/* ═══════════════════════════════════════════════════════════════
   Drug Library Optimization — Premium Dark Mode Design
   ═══════════════════════════════════════════════════════════════ */

/* Fonts loaded via <link> in HTML for non-render-blocking behavior */

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #070712;
    --bg-secondary: #0f0f1d;
    --bg-card: rgba(18, 18, 30, 0.55);
    --bg-card-hover: rgba(28, 28, 45, 0.65);
    --border-card: rgba(130, 130, 255, 0.15);
    --border-active: rgba(130, 200, 255, 0.4);

    --text-primary: #f8f8ff;
    --text-secondary: #a8a8c8;
    --text-muted: #9696b9;

    --accent-teal: #12f3b9;
    --accent-purple: #9d7cff;
    --accent-blue: #32c4ff;
    --accent-pink: #ff5eb0;
    --accent-green: #3fff70;
    --accent-orange: #ffaa33;
    --accent-red: #ff4a4a;

    --gradient-primary: linear-gradient(135deg, #12f3b9, #9d7cff);
    --gradient-bg: linear-gradient(160deg, #070712 0%, #151532 50%, #0a0a1a 100%);
    --gradient-card: linear-gradient(135deg, rgba(18, 243, 185, 0.08), rgba(157, 124, 255, 0.08));

    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.22);

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 15px;
    scroll-behavior: smooth;
    scroll-padding-top: 6rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    color-scheme: dark;
}


button,
input,
select,
textarea {
    font: inherit;
}

/* ─── Layout ─── */
.app-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* ─── Header ─── */
.app-header {
    margin-bottom: 2.5rem;
    animation: fadeInDown 0.6s ease-out;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
}

.app-logo {
    max-height: 100px;
    object-fit: contain;
}

.logo-text-container {
    text-align: left;
}

.logo-text-container h1 {
    font-size: 3.2rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.text-teal {
    color: var(--accent-teal);
}

.text-white {
    color: var(--text-primary);
}

.app-header .subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 500;
    margin: 0;
    margin-top: 0.8rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-align: center;
}

/* ─── Step Indicator ─── */
.step-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    margin-bottom: 2.5rem;
    animation: fadeInDown 0.6s ease-out 0.1s both;
}

.step-dot {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 700;
    background: var(--bg-secondary);
    border: 2px solid var(--border-card);
    color: var(--text-muted);
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.step-dot.active {
    background: var(--gradient-primary);
    border: none;
    color: var(--bg-primary);
    box-shadow: 0 0 12px rgba(18, 243, 185, 0.35);
}

.step-dot.completed {
    background: var(--accent-teal);
    border: none;
    color: #070712;
}

.step-line {
    width: 80px;
    height: 2px;
    background: var(--border-card);
    transition: background var(--transition-smooth);
    flex-shrink: 0;
}

.step-line.completed {
    background: var(--accent-teal);
}

/* ─── Cards ─── */
.card {
    background: rgba(18, 18, 30, 0.85);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast);
}

.card:hover {
    border-color: var(--border-active);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.card-title .icon {
    font-size: 1.3rem;
}

/* ─── Step Sections ─── */
.step-section {
    display: none;
}

.step-section.active {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

/* ─── File Upload Drop Zone ─── */
.drop-zone {
    border: 2px dashed var(--border-card);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast);
    background: rgba(56, 217, 169, 0.02);
    position: relative;
    overflow: hidden;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-teal);
    background: rgba(56, 217, 169, 0.06);
}

.drop-zone .upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.drop-zone .upload-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.drop-zone .upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-selected {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(56, 217, 169, 0.08);
    border: 1px solid rgba(56, 217, 169, 0.2);
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--accent-teal);
}

/* ─── Validation Summary ─── */
.validation-summary {
    margin-top: 1.5rem;
    animation: fadeInUp 0.4s ease-out;
}

.validation-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.validation-row.matched {
    background: rgba(81, 207, 102, 0.08);
    border: 1px solid rgba(81, 207, 102, 0.15);
    color: var(--accent-green);
}

.validation-row.unmatched {
    background: rgba(255, 107, 107, 0.08);
    border: 1px solid rgba(255, 107, 107, 0.15);
    color: var(--accent-red);
}

.target-list {
    max-height: 180px;
    overflow-y: auto;
    margin-top: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
    line-height: 1.8;
}

.target-list::-webkit-scrollbar {
    width: 6px;
}

.target-list::-webkit-scrollbar-thumb {
    background: var(--border-card);
    border-radius: 3px;
}

.target-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 4px;
    border-radius: 4px;
}

.target-list-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.target-list-delete {
    cursor: pointer;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.target-list-delete:hover {
    opacity: 1;
}

/* ─── Threshold Control ─── */
.threshold-control {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
}

.threshold-control label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

/* ─── Form Controls ─── */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group .label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-group .value-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent-teal);
    font-weight: 500;
}

.form-group .value-display-input {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent-teal);
    font-weight: 500;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-card);
    border-radius: 4px;
    width: 48px;
    text-align: center;
    padding: 2px 4px;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.form-group .value-display-input:hover,
.form-group .value-display-input:focus {
    border-color: var(--border-card);
    background: rgba(0, 0, 0, 0.2);
    outline: none;
}

.form-group .value-display-input::-webkit-outer-spin-button,
.form-group .value-display-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-group .value-display-input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.3);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(56, 217, 169, 0.3);
    transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="number"] {
    width: 100%;
    padding: 0.65rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

input[type="number"]:focus {
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 3px rgba(56, 217, 169, 0.1);
}

/* ─── Hyperparameters Grid ─── */
.params-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 640px) {
    .params-grid {
        grid-template-columns: 1fr;
    }
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
    white-space: normal;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-card);
}

.btn-secondary:hover {
    border-color: var(--border-active);
    background: rgba(255, 255, 255, 0.08);
}

.btn-icon {
    font-size: 1.1rem;
}

.btn-row {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.optimization-actions {
    align-items: center;
}

.optimization-actions .opt-complete-inline {
    flex: 1;
    min-width: 0;
}

.optimization-actions .opt-complete-text {
    min-width: 0;
    overflow-wrap: anywhere;
}

.optimization-buttons {
    display: flex;
    flex-shrink: 0;
    gap: 1rem;
    margin-left: auto;
}

.optimization-actions .btn {
    flex-shrink: 0;
    white-space: nowrap;
}

/* ─── Pipeline Progress ─── */
.pipeline-steps {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pipeline-step {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid transparent;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.pipeline-step.active {
    background: rgba(56, 217, 169, 0.06);
    border-color: rgba(56, 217, 169, 0.2);
}

.pipeline-step.completed {
    background: rgba(81, 207, 102, 0.06);
    border-color: rgba(81, 207, 102, 0.15);
}

.pipeline-step.error {
    background: rgba(255, 107, 107, 0.06);
    border-color: rgba(255, 107, 107, 0.15);
}

.pipeline-step .step-icon {
    font-size: 1.2rem;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex-shrink: 0;
}

.pipeline-step .step-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pipeline-step.active .step-text,
.pipeline-step.completed .step-text {
    color: var(--text-primary);
}

.pipeline-step .step-detail {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    margin-top: 0.2rem;
}

/* Spinner animation */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(56, 217, 169, 0.2);
    border-top-color: var(--accent-teal);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    will-change: transform;
    box-sizing: border-box;
    vertical-align: middle;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ─── Dataset Summary Card ─── */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    padding: 1.25rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    text-align: center;
}

.stat-card:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--accent-teal);
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ─── Results Dashboard ─── */
.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

/* ─── Comparison Table ─── */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.comparison-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-card);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.comparison-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(120, 120, 255, 0.06);
}

.comparison-table tr:hover td {
    background: rgba(56, 217, 169, 0.03);
}

.comparison-table .metric-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.comparison-table .value {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}

.pct-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    margin-left: 0.5rem;
}

.pct-badge.good {
    background: rgba(81, 207, 102, 0.12);
    color: var(--accent-green);
}

.pct-badge.neutral {
    background: rgba(255, 146, 43, 0.12);
    color: var(--accent-orange);
}

.pct-badge.bad {
    background: rgba(255, 107, 107, 0.12);
    color: var(--accent-red);
}


/* ─── Charts ─── */
.chart-container {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-card);
    padding: 0.5rem;
}

/* ─── Optimization Status Indicator ─── */
.opt-status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
}

.opt-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-teal);
    box-shadow: 0 0 6px var(--accent-teal);
    animation: statusPulse 1.4s ease-in-out infinite;
    flex-shrink: 0;
}

.opt-status-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

@keyframes statusPulse {

    0%,
    100% {
        opacity: 0.4;
        transform: scale(0.85);
    }

    50% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ─── Optimization Complete Text ─── */
.opt-complete-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: auto;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.opt-complete-inline.visible {
    opacity: 1;
    transform: translateY(0);
}

.opt-complete-icon {
    font-size: 1.2rem;
}

.opt-complete-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-teal);
    font-family: 'Inter', sans-serif;
}

/* ─── Download Buttons ─── */
.download-row {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* ─── Error Display ─── */
.error-box {
    padding: 1rem 1.25rem;
    background: rgba(255, 107, 107, 0.08);
    border: 1px solid rgba(255, 107, 107, 0.2);
    border-radius: var(--radius-sm);
    color: var(--accent-red);
    font-size: 0.9rem;
    margin-top: 0rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.3s ease-out;
}

/* ═══════════════════════════════════════════════════════════════
   Navigation Bar
   ═══════════════════════════════════════════════════════════════ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: var(--bg-primary);
    box-shadow: 0 1px 0 rgba(130, 130, 255, 0.08);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.navbar-brand:hover {
    opacity: 0.85;
}

.navbar-logo {
    height: 42px;
    width: auto;
    object-fit: contain;
}

.navbar-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--accent-teal);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-teal);
    border-radius: 1px;
}

.nav-link.nav-cta {
    background: var(--gradient-primary);
    color: #fff;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-left: 0.5rem;
}

.nav-link.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    background: var(--gradient-primary);
}

.nav-link.nav-cta.active::after {
    display: none;
}

/* Hamburger */
.navbar-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 11px;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
}

.navbar-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.navbar-hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar-hamburger.open span:nth-child(2) {
    opacity: 0;
}

.navbar-hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.navbar-mobile-menu {
    display: none;
    flex-direction: column;
    padding: 0.5rem 2rem 1.25rem;
    gap: 0.25rem;
    background: var(--bg-primary);
    border-top: 1px solid rgba(130, 130, 255, 0.08);
}

.navbar-mobile-menu.open {
    display: flex;
}

/* Tool page offset for fixed navbar */
.tool-page .tool-app-container {
    padding-top: 6rem;
}

.home-page {
    overflow-x: hidden;
}


/* ═══════════════════════════════════════════════════════════════
   Hero Section
   ═══════════════════════════════════════════════════════════════ */

.hero-section {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10rem 2rem 4rem;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(18, 243, 185, 0.12) 0%, rgba(157, 124, 255, 0.06) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.hero-particle {
    position: absolute;
    border-radius: 50%;
    background: var(--accent-teal);
    opacity: 0.2;
    animation: floatParticle 10s ease-in-out infinite;
    animation-play-state: paused;
}

@keyframes floatParticle {

    0%,
    100% {
        transform: translateY(0) translateX(0);
        opacity: 0.15;
    }

    25% {
        transform: translateY(-30px) translateX(15px);
        opacity: 0.3;
    }

    50% {
        transform: translateY(-15px) translateX(-10px);
        opacity: 0.1;
    }

    75% {
        transform: translateY(-40px) translateX(5px);
        opacity: 0.25;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}


.hero-section.hero-motion-active .hero-particle {
    animation-play-state: running;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3.5rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
}


/* ═══════════════════════════════════════════════════════════════
   Sections
   ═══════════════════════════════════════════════════════════════ */

.section {
    padding: 6rem 2rem;
    position: relative;
}

.section-alt {
    background: rgba(15, 15, 29, 0.5);
}

.section-container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: rgba(157, 124, 255, 0.1);
    border: 1px solid rgba(157, 124, 255, 0.2);
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-purple);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}


/* ═══════════════════════════════════════════════════════════════
   Visualization Showcase
   ═══════════════════════════════════════════════════════════════ */

.viz-showcase {
    display: flex;
    flex-direction: column;
    gap: 5.5rem;
}

.viz-item {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 2.5rem;
    align-items: start;
}

.viz-item.viz-reverse {
    grid-template-columns: 1.15fr 1fr;
}

.viz-item.viz-reverse .viz-info {
    order: 2;
}

.viz-item.viz-reverse .viz-plot-card {
    order: 1;
}

.viz-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 0.25rem;
}

.viz-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    background: rgba(18, 243, 185, 0.08);
    border: 1px solid rgba(18, 243, 185, 0.2);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-teal);
    width: fit-content;
}

.viz-badge-purple {
    background: rgba(157, 124, 255, 0.1);
    border-color: rgba(157, 124, 255, 0.25);
    color: var(--accent-purple);
}

.viz-badge-blue {
    background: rgba(50, 196, 255, 0.1);
    border-color: rgba(50, 196, 255, 0.25);
    color: var(--accent-blue);
}

.viz-badge-icon {
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
}

.viz-title {
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.25;
}

.viz-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.viz-features {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.viz-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.viz-features li strong {
    color: var(--text-primary);
}

.viz-features li em {
    color: var(--accent-teal);
    font-style: normal;
    font-weight: 500;
}

.viz-feat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-primary);
    margin-top: 0.45rem;
    flex-shrink: 0;
}

.viz-plot-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
    position: relative;
}

.viz-plot-card:hover {
    border-color: var(--border-active);
}

.viz-plot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.viz-plot-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.viz-plot-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.04);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.viz-nodata-badge {
    position: absolute;
    bottom: 22px;
    right: 7px;
    color: #9898b8;
    font-size: 11px;
    display: flex;
    align-items: center;
    gap: 6px;
    pointer-events: none;
}

.viz-nodata-box {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid #9898b8;
    border-radius: 2px;
}


/* ═══════════════════════════════════════════════════════════════
   CTA Section
   ═══════════════════════════════════════════════════════════════ */

.cta-section {
    padding: 6rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 800px;
    height: 100%;
    background: radial-gradient(ellipse 50% 50% at 50% 50%, rgba(18, 243, 185, 0.13) 0%, rgba(157, 124, 255, 0.05) 45%, transparent 75%);
    pointer-events: none;
    z-index: 0;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.cta-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 2rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}


/* ═══════════════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════════════ */

.site-footer {
    padding: 2rem;
    border-top: 1px solid var(--border-card);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
}

.footer-text {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-text a {
    color: var(--accent-teal);
    text-decoration: none;
    transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

.footer-text a:hover {
    text-decoration: underline;
    color: #fff;
}


/* ═══════════════════════════════════════════════════════════════
   Scroll Animations
   ═══════════════════════════════════════════════════════════════ */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animations for cards */


@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ─── Tooltip Info Icon ─── */
.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(132, 94, 247, 0.2);
    color: var(--accent-teal);
    font-size: 10px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    cursor: help;
    margin-left: 0.4rem;
    position: relative;
    vertical-align: middle;
}

.info-icon:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 160%;
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    max-width: 260px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-card);
    font-size: 0.75rem;
    font-weight: 400;
    line-height: 1.5;
    text-align: left;
    white-space: pre-wrap;
    box-shadow: var(--shadow-card);
    z-index: 1000;
    pointer-events: none;
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }

    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}

/* ═══════════════════════════════════════════════════════════════
   Set Up Section — 2-Tier Workflow & Ingestion Engine
   ═══════════════════════════════════════════════════════════════ */

.setup-grid-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.setup-tier-primary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: stretch;
}

.setup-workflow-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: stretch;
}

.setup-step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.setup-step-card:hover {
    border-color: var(--border-active);
    transform: translateY(-4px);
}

.setup-card-teal:hover {
    border-color: rgba(18, 243, 185, 0.45);
}

.setup-card-purple:hover {
    border-color: rgba(157, 124, 255, 0.45);
}

.setup-card-amber:hover {
    border-color: rgba(255, 170, 51, 0.45);
}

.setup-card-top {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setup-step-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.25rem;
}

.setup-step-number {
    padding: 0.25rem 0.65rem;
    background: linear-gradient(135deg, rgba(18, 243, 185, 0.15), rgba(18, 243, 185, 0.05));
    border: 1px solid rgba(18, 243, 185, 0.35);
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-teal);
    letter-spacing: 0.05em;
}

.setup-step-badge-purple .setup-step-number {
    background: linear-gradient(135deg, rgba(157, 124, 255, 0.15), rgba(157, 124, 255, 0.05));
    border-color: rgba(157, 124, 255, 0.35);
    color: var(--accent-purple);
}

.setup-step-badge-amber .setup-step-number {
    background: linear-gradient(135deg, rgba(255, 170, 51, 0.15), rgba(255, 170, 51, 0.05));
    border-color: rgba(255, 170, 51, 0.35);
    color: var(--accent-orange);
}

.setup-step-pill {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.setup-card-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
}

.setup-card-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* Interactive Preview Boxes */
.setup-interactive-preview {
    background: rgba(10, 10, 22, 0.6);
    border: 1px solid rgba(120, 120, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    flex: 1;
}

.setup-dropzone-mock {
    border: 2px dashed rgba(18, 243, 185, 0.3);
    border-radius: var(--radius-sm);
    padding: 1.5rem 1.25rem;
    text-align: center;
    background: rgba(18, 243, 185, 0.02);
    transition: border-color var(--transition-fast), background var(--transition-fast);
    margin: auto 0;
}

.setup-dropzone-mock:hover {
    border-color: var(--accent-teal);
    background: rgba(18, 243, 185, 0.05);
}

.setup-dropzone-teal {
    border-color: rgba(18, 243, 185, 0.3);
    background: rgba(18, 243, 185, 0.02);
}

.setup-dropzone-teal:hover {
    border-color: var(--accent-teal);
    background: rgba(18, 243, 185, 0.05);
}

.setup-dropzone-teal .setup-dropzone-icon {
    color: var(--accent-teal);
}

.setup-dropzone-purple {
    border-color: rgba(157, 124, 255, 0.3);
    background: rgba(157, 124, 255, 0.02);
}

.setup-dropzone-purple:hover {
    border-color: var(--accent-purple);
    background: rgba(157, 124, 255, 0.05);
}

.setup-dropzone-purple .setup-dropzone-icon {
    color: var(--accent-purple);
}

.setup-dropzone-amber {
    border-color: rgba(255, 170, 51, 0.3);
    background: rgba(255, 170, 51, 0.02);
}

.setup-dropzone-amber:hover {
    border-color: var(--accent-orange);
    background: rgba(255, 170, 51, 0.05);
}

.setup-dropzone-amber .setup-dropzone-icon {
    color: var(--accent-orange);
}

.setup-dropzone-icon {
    color: var(--accent-teal);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.4rem;
}

.setup-dropzone-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.setup-dropzone-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.setup-format-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.75rem;
}

.setup-format-badges span {
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.setup-format-badges .badge-group-label {
    background: transparent;
    border: none;
    font-weight: 600;
    color: var(--text-muted);
    padding: 0.15rem 0.2rem;
    font-size: 0.7rem;
}

.setup-format-badges .badge-accent {
    background: rgba(255, 170, 51, 0.12);
    border-color: rgba(255, 170, 51, 0.3);
    color: var(--accent-orange);
    font-weight: 600;
}

.setup-stats-preview-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.setup-mini-chip {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(157, 124, 255, 0.18);
    border-radius: 6px;
    padding: 0.4rem 0.3rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.setup-mini-chip .chip-val {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-purple);
    font-family: 'JetBrains Mono', monospace;
}

.setup-mini-chip .chip-lbl {
    font-size: 0.64rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.setup-validated-box {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    border: 1px solid rgba(120, 120, 255, 0.1);
}

.setup-validated-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    font-size: 0.82rem;
}

.setup-check-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(18, 243, 185, 0.2);
    color: var(--accent-teal);
    font-weight: 700;
    font-size: 0.7rem;
    margin-right: 0.4rem;
}

.setup-validated-title {
    color: var(--text-primary);
    font-weight: 600;
    flex: 1;
}

.setup-status-pill {
    font-size: 0.72rem;
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    background: rgba(18, 243, 185, 0.1);
    color: var(--accent-teal);
    border: 1px solid rgba(18, 243, 185, 0.3);
    font-weight: 600;
}

.setup-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.setup-tag {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    background: rgba(18, 243, 185, 0.08);
    border: 1px solid rgba(18, 243, 185, 0.25);
    border-radius: 5px;
    font-size: 0.75rem;
    color: var(--accent-teal);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.setup-tag:hover {
    background: rgba(18, 243, 185, 0.18);
    transform: translateY(-1px);
}

/* Pipeline Tracker Preview */
.setup-pipeline-card {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.setup-pipeline-step-v2 {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(120, 120, 255, 0.08);
    border-radius: 8px;
}

.setup-step-marker {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-teal), #0ec292);
    color: #070712;
    font-weight: 800;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.setup-step-heading {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.setup-step-sub {
    font-size: 0.76rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
    line-height: 1.4;
}

/* Pricing Card & Split Preview */
.setup-pricing-card {
    width: 100%;
}

.setup-pricing-split {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 1.5rem;
    background: rgba(10, 10, 22, 0.6);
    border: 1px solid rgba(120, 120, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.setup-pricing-subpanel {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.setup-subpanel-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--text-primary);
}

.setup-subpanel-title svg {
    color: var(--accent-orange);
    flex-shrink: 0;
}

.setup-pipe-amber {
    border-color: rgba(255, 170, 51, 0.15);
    background: rgba(255, 170, 51, 0.02);
}

.setup-marker-amber {
    background: linear-gradient(135deg, var(--accent-orange), #e68a00);
    color: #070712;
}

.setup-pricing-feat-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 0.5rem;
}

.setup-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
}

.setup-stat-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(120, 120, 255, 0.1);
    border-radius: 8px;
    padding: 0.65rem 0.4rem;
    text-align: center;
}

.setup-stat-num {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-teal);
    font-family: 'JetBrains Mono', monospace;
}

.setup-stat-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Feature Checkmarks List */
.setup-feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: auto;
}

.setup-feat-item {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

.setup-feat-item strong {
    color: var(--text-primary);
}

.setup-feat-icon {
    font-size: 0.95rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.setup-feat-bullet {
    color: var(--accent-teal);
    font-size: 1.1rem;
    line-height: 1.35;
    flex-shrink: 0;
}

.setup-bullet-purple {
    color: var(--accent-purple) !important;
}

.setup-bullet-amber {
    color: var(--accent-orange) !important;
}


/* ═══════════════════════════════════════════════════════════════
   Optimization Section — Cockpit Dashboard & Genetic Engine
   ═══════════════════════════════════════════════════════════════ */

.opt-cockpit {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 2rem;
    align-items: stretch;
    margin-bottom: 2.5rem;
}

.opt-cockpit-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast);
}

.opt-cockpit-panel:hover {
    border-color: var(--border-active);
}

.opt-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.opt-panel-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.opt-panel-icon {
    font-size: 1.6rem;
}

.opt-panel-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.opt-panel-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.opt-badge-live {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: 50px;
    background: rgba(18, 243, 185, 0.1);
    border: 1px solid rgba(18, 243, 185, 0.3);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-teal);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.opt-panel-desc,
.opt-chart-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.opt-controls-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex: 1;
    gap: 1.25rem;
}

.opt-slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.opt-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.opt-slider-label {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--text-primary);
}

.opt-slider-val {
    font-size: 0.88rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-teal);
}

.opt-slider-sub {
    font-size: 0.74rem;
    color: var(--text-muted);
}

.opt-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.opt-slider:hover {
    background: rgba(255, 255, 255, 0.15);
}

.opt-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-teal);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(18, 243, 185, 0.5);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.opt-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.opt-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-teal);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(18, 243, 185, 0.5);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.opt-formula-box {
    background: rgba(10, 10, 22, 0.7);
    border: 1px solid rgba(120, 120, 255, 0.18);
    border-radius: 8px;
    padding: 0.85rem 1rem;
}

.opt-formula-header {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    font-weight: 600;
}

.opt-formula-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.84rem;
    color: var(--text-primary);
}

.opt-highlight-teal {
    color: var(--accent-teal);
    font-weight: 700;
}

.opt-highlight-purple {
    color: var(--accent-purple);
    font-weight: 700;
}

.opt-advanced-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.opt-adv-badge {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(120, 120, 255, 0.1);
    border-radius: 6px;
    padding: 0.4rem 0.3rem;
    text-align: center;
}

.opt-adv-label {
    display: block;
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.opt-adv-val {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
    margin-top: 0.1rem;
}

/* History Chart Card */
.opt-cockpit-chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast);
}

.opt-cockpit-chart-card:hover {
    border-color: var(--border-active);
}

.opt-chart-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.opt-chart-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.opt-chart-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.opt-metrics-strip {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
    background: rgba(10, 10, 22, 0.6);
    border: 1px solid rgba(120, 120, 255, 0.12);
    border-radius: 8px;
    padding: 0.75rem 1rem;
}

.opt-metric-item {
    text-align: center;
}

.opt-metric-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.opt-metric-val {
    display: block;
    font-size: 1.15rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
    margin-top: 0.1rem;
}

.opt-text-teal {
    color: var(--accent-teal);
}

.opt-text-purple {
    color: var(--accent-purple);
}

.opt-metric-divider {
    width: 1px;
    height: 28px;
    background: rgba(120, 120, 255, 0.12);
}

.opt-chart-wrapper {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.15);
}

.opt-chart-footer {
    display: flex;
    align-items: center;
}

.opt-chart-note {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(120, 120, 255, 0.08);
    border-radius: 6px;
    padding: 0.6rem 0.85rem;
    width: 100%;
}

.opt-note-icon {
    font-size: 0.95rem;
    flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   Maximum Price Limit Card — Side-by-Side Pareto Comparison
   ═══════════════════════════════════════════════════════════════ */

.opt-budget-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    margin-bottom: 2.75rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.opt-budget-card:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
}

.opt-budget-card-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.opt-budget-badge-wrap {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.25rem;
}

.opt-budget-badge-tag {
    padding: 0.25rem 0.65rem;
    background: linear-gradient(135deg, rgba(50, 196, 255, 0.15), rgba(157, 124, 255, 0.1));
    border: 1px solid rgba(50, 196, 255, 0.4);
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-blue);
    letter-spacing: 0.05em;
}

.opt-budget-badge-sub {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.opt-budget-card-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--text-primary);
}

.opt-budget-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 900px;
}

/* Grid Layout */
.opt-budget-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.opt-budget-panel {
    background: rgba(10, 10, 24, 0.65);
    border: 1px solid rgba(120, 120, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.opt-budget-panel:hover {
    border-color: rgba(50, 196, 255, 0.3);
    background: rgba(14, 14, 32, 0.8);
}

.opt-panel-filtered {
    border-color: rgba(157, 124, 255, 0.22);
}

.opt-panel-filtered:hover {
    border-color: rgba(157, 124, 255, 0.45);
}

.opt-budget-panel-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(120, 120, 255, 0.1);
}

.opt-budget-panel-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.opt-budget-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.opt-dot-cyan {
    background: var(--accent-blue);
    box-shadow: 0 0 8px rgba(50, 196, 255, 0.6);
}

.opt-dot-indigo {
    background: var(--accent-purple);
    box-shadow: 0 0 8px rgba(157, 124, 255, 0.6);
}

.opt-budget-limit-pill {
    display: inline-block;
    background: rgba(157, 124, 255, 0.15);
    border: 1px solid rgba(157, 124, 255, 0.35);
    color: var(--accent-purple);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.1rem 0.45rem;
    border-radius: 4px;
    margin-left: 0.35rem;
}

.opt-budget-count-badge {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.opt-badge-green {
    color: var(--accent-green);
    font-weight: 600;
}

/* Candidate list */
.opt-budget-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.opt-budget-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(120, 120, 255, 0.08);
    border-radius: 8px;
    padding: 0.65rem 0.9rem;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

.opt-candidate-info {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.opt-candidate-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.opt-candidate-metric {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.opt-candidate-metric strong {
    color: var(--accent-teal);
}

.opt-candidate-cost-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.opt-candidate-cost {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.opt-candidate-tag {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    letter-spacing: 0.02em;
}

.opt-tag-muted {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Highlighted Knee Points */
.opt-item-highlight-cyan {
    background: rgba(50, 196, 255, 0.08);
    border: 1px solid rgba(50, 196, 255, 0.35);
    box-shadow: 0 0 12px rgba(50, 196, 255, 0.15);
}

.opt-tag-cyan {
    background: rgba(50, 196, 255, 0.2);
    color: var(--accent-blue);
    border: 1px solid rgba(50, 196, 255, 0.4);
}

.opt-item-highlight-indigo {
    background: rgba(157, 124, 255, 0.1);
    border: 1px solid rgba(157, 124, 255, 0.45);
    box-shadow: 0 0 12px rgba(157, 124, 255, 0.2);
}

.opt-tag-indigo {
    background: rgba(157, 124, 255, 0.22);
    color: var(--accent-purple);
    border: 1px solid rgba(157, 124, 255, 0.5);
    font-weight: 700;
}

.opt-tag-in-budget {
    background: rgba(63, 255, 112, 0.12);
    color: var(--accent-green);
    border: 1px solid rgba(63, 255, 112, 0.3);
}

/* Dimmed / Excluded Candidates */
.opt-item-dimmed {
    opacity: 0.38;
    background: rgba(10, 10, 20, 0.4);
    border: 1px dashed rgba(255, 74, 74, 0.2);
}

.opt-item-dimmed:hover {
    opacity: 0.65;
}

.opt-cost-strike {
    text-decoration: line-through;
    color: var(--text-muted);
}

.opt-tag-excluded {
    background: rgba(255, 74, 74, 0.12);
    color: var(--accent-red);
    border: 1px solid rgba(255, 74, 74, 0.25);
    font-size: 0.7rem;
}

.opt-budget-panel-footer {
    font-size: 0.78rem;
    color: var(--text-muted);
    padding-top: 0.4rem;
    border-top: 1px solid rgba(120, 120, 255, 0.08);
    line-height: 1.45;
}

.opt-budget-panel-footer strong {
    color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════════
   Advanced Options Overview Card
   ═══════════════════════════════════════════════════════════════ */

.opt-advanced-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    box-shadow: var(--shadow-card);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.opt-advanced-card:hover {
    border-color: var(--border-active);
    transform: translateY(-3px);
}

.opt-adv-card-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.opt-adv-badge-wrap {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.25rem;
}

.opt-adv-badge-tag {
    padding: 0.25rem 0.65rem;
    background: linear-gradient(135deg, rgba(18, 243, 185, 0.15), rgba(18, 243, 185, 0.05));
    border: 1px solid rgba(18, 243, 185, 0.35);
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-teal);
    letter-spacing: 0.05em;
}

.opt-adv-badge-sub {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.opt-adv-card-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--text-primary);
}

.opt-adv-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 900px;
}

.opt-adv-params-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.opt-adv-param-box {
    background: rgba(10, 10, 24, 0.6);
    border: 1px solid rgba(120, 120, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.opt-adv-param-box:hover {
    border-color: rgba(18, 243, 185, 0.35);
    background: rgba(16, 16, 36, 0.75);
}

.opt-adv-param-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.opt-adv-param-heading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.opt-adv-param-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.opt-adv-param-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.opt-adv-param-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    color: var(--accent-purple);
    background: rgba(157, 124, 255, 0.08);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    border: 1px solid rgba(157, 124, 255, 0.2);
}

.opt-adv-param-badges {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.opt-adv-badge-val {
    font-size: 0.74rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-teal);
    background: rgba(18, 243, 185, 0.08);
    border: 1px solid rgba(18, 243, 185, 0.25);
    border-radius: 4px;
    padding: 0.2rem 0.45rem;
}

.opt-adv-badge-range {
    font-size: 0.72rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(120, 120, 255, 0.1);
    border-radius: 4px;
    padding: 0.2rem 0.45rem;
}

.opt-adv-param-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

.opt-adv-param-features {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    border-top: 1px solid rgba(120, 120, 255, 0.08);
    padding-top: 0.75rem;
}

.opt-adv-feat-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.opt-adv-feat-bullet {
    color: var(--accent-teal);
    font-size: 1.1rem;
    line-height: 1.25;
    flex-shrink: 0;
}

.opt-adv-card-footer {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1.5rem;
    background: rgba(10, 10, 24, 0.75);
    border: 1px solid rgba(120, 120, 255, 0.14);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
}

.opt-adv-footer-item {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
}

.opt-adv-footer-icon {
    font-size: 1.4rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.opt-adv-footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.opt-adv-footer-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.opt-adv-footer-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.opt-adv-footer-divider {
    width: 1px;
    height: 48px;
    background: rgba(120, 120, 255, 0.15);
}

/* ═══════════════════════════════════════════════════════════════
   References Section (IEEE Citation)
   ═══════════════════════════════════════════════════════════════ */

.references-section {
    padding: 3rem 2rem 3.5rem;
    border-top: 1px solid var(--border-card);
    background: rgba(10, 10, 22, 0.45);
}

.references-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.references-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.reference-item {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.ref-num {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent-teal);
    flex-shrink: 0;
}

.ref-text {
    color: var(--text-secondary);
}

.ref-text em {
    font-style: italic;
    color: #dedee8;
}

.ref-text a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.ref-text a:hover {
    color: var(--accent-teal);
    text-decoration: underline;
}

/* Citation in-text links */
.citation-ref {
    color: var(--accent-teal);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.88em;
    padding: 0 0.15rem;
    transition: color var(--transition-fast);
}

.citation-ref:hover {
    color: #fff;
    text-decoration: underline;
    text-shadow: 0 0 8px rgba(18, 243, 185, 0.4);
}

@media (max-width: 768px) {
    .references-section {
        padding: 2.5rem 1.5rem;
    }

    .reference-item {
        font-size: 0.85rem;
    }
}

/* ─── Heatmap Vertical Compound Slider ─── */
.heatmap-vslider-container {
    user-select: none;
    position: relative;
    width: 100%;
    overflow: visible;
}

.heatmap-vertical-slider {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) rotate(90deg) !important;
    transform-origin: center center !important;
    height: 6px !important;
    cursor: pointer !important;
    margin: 0 !important;
    padding: 0 !important;
    background: rgba(255, 255, 255, 0.3) !important;
    outline: none !important;
    max-width: none !important;
    box-sizing: border-box !important;
}

.heatmap-vertical-slider::-webkit-slider-thumb {
    width: 18px;
    height: 18px;
}

/* ─── Upload Mode Switcher ─── */
.mode-switch-container {
    display: flex;
    background: rgba(15, 15, 29, 0.7);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 5px;
    gap: 6px;
    margin-bottom: 1.5rem;
}

.mode-tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.mode-tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.mode-tab-btn.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(18, 243, 185, 0.18), rgba(157, 124, 255, 0.18));
    border-color: rgba(18, 243, 185, 0.35);
    box-shadow: 0 4px 15px rgba(18, 243, 185, 0.12);
}

.mode-tab-btn .tab-icon {
    font-size: 1.15rem;
}

/* ─── Secondary Price Upload Section ─── */
.secondary-upload-card {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(157, 124, 255, 0.3);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.secondary-upload-card:hover {
    border-color: rgba(157, 124, 255, 0.5);
    background: rgba(157, 124, 255, 0.03);
}

.secondary-upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.secondary-upload-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.price-drop-zone {
    position: relative;
    border: 1px dashed var(--border-card);
    border-radius: var(--radius-sm);
    padding: 1rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.price-drop-zone:hover,
.price-drop-zone.drag-over {
    border-color: var(--accent-purple);
    background: rgba(157, 124, 255, 0.06);
}

.price-drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 5;
}

.price-drop-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    pointer-events: none;
}

.price-drop-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
    pointer-events: none;
}

/* ─── Affinity Stats Grid ─── */
.affinity-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.affinity-stat-chip {
    background: rgba(18, 243, 185, 0.06);
    border: 1px solid rgba(18, 243, 185, 0.2);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    text-align: center;
}

.affinity-stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-teal);
    font-family: 'JetBrains Mono', monospace;
}

.affinity-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

.affinity-list-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    margin-bottom: 0.35rem;
    letter-spacing: 0.3px;
}
/* ─── Shared interaction and workspace polish ─── */
.ui-icon {
    width: 1.2em;
    height: 1.2em;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.2em;
    flex-shrink: 0;
}

.upload-icon .ui-icon {
    color: var(--accent-teal);
}

:focus-visible,
.form-group .value-display-input:focus-visible,
input[type="range"]:focus-visible {
    outline: 2px solid var(--accent-teal);
    outline-offset: 4px;
}

/* Show focus on the visible wrapper only for keyboard-focused file inputs. */
.drop-zone:has(input[type="file"]:focus-visible),
.price-drop-zone:has(input[type="file"]:focus-visible) {
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 3px rgba(18, 243, 185, 0.15);
}

input[type="checkbox"] {
    accent-color: var(--accent-teal);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border: 0;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 1rem;
    z-index: 1100;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--accent-teal);
    color: var(--bg-primary);
    font-weight: 600;
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}

.workspace-header {
    margin-bottom: 2rem;
}

.workspace-eyebrow {
    color: var(--accent-teal);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.workspace-header h1 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    line-height: 1.2;
    letter-spacing: -0.035em;
    margin-bottom: 0.65rem;
}

.workspace-header p:last-child {
    color: var(--text-secondary);
    max-width: 60ch;
}

.step-indicator {
    padding: 1.5rem 1rem 3.25rem;
    background: rgba(15, 15, 29, 0.65);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.step-indicator:hover {
    border-color: var(--border-active);
}

.step-label {
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
}

.step-dot.active .step-label,
.step-dot.completed .step-label {
    color: var(--accent-teal);
}

.mode-tab-btn {
    font-family: inherit;
    min-height: 44px;
}

.mode-tab-btn.active {
    background: rgba(18, 243, 185, 0.1);
    color: var(--accent-teal);
    box-shadow: none;
}

.form-group .label-row {
    gap: 1rem;
}

.form-group .value-display-input {
    min-width: 4.5rem;
    min-height: 36px;
    border-radius: 8px;
}

.file-selected,
.secondary-upload-title,
.ref-text {
    overflow-wrap: anywhere;
    min-width: 0;
}

.setup-tier-primary > *,
.setup-pricing-split > *,
.opt-cockpit > *,
.opt-budget-grid > *,
.opt-adv-params-grid > *,
.viz-item > * {
    min-width: 0;
}

.comparison-table tbody tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.hero-title,
.section-title {
    text-wrap: balance;
}

/* Keep responsive rules after components so mobile layouts take precedence. */
/* ─── Responsive ─── */
@media (max-width: 992px) {
    .setup-pricing-split {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .setup-pricing-feat-list {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }
}

@media (max-width: 768px) {

    /* Navbar mobile */
    .navbar-links {
        display: none;
    }

    .navbar-hamburger {
        display: flex;
    }

    .navbar-inner {
        padding: 0.6rem 1.25rem;
    }

    .navbar-logo {
        height: 34px;
    }

    .navbar-title {
        font-size: 1.25rem;
    }

    /* Hero mobile */
    .hero-section {
        padding: 6rem 1.25rem 3rem;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }


    /* Sections mobile */
    .section {
        padding: 3.5rem 1.25rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    /* Set Up mobile */
    .setup-tier-primary,
    .setup-workflow-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .setup-stats-preview-row {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }

    /* Optimization mobile */
    .opt-cockpit {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .opt-budget-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .opt-adv-params-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .opt-adv-card-footer {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .opt-adv-footer-divider {
        display: none;
    }

    .opt-budget-card,
    .opt-advanced-card {
        padding: 1.5rem;
    }

    .opt-metrics-strip {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .opt-metric-divider {
        display: none;
    }

    .opt-cockpit-panel,
    .opt-cockpit-chart-card {
        padding: 1.5rem;
    }

    /* Visualizations mobile */
    .viz-showcase {
        gap: 4rem;
    }

    .viz-item,
    .viz-item.viz-reverse {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .viz-item.viz-reverse .viz-info {
        order: 1;
    }

    .viz-item.viz-reverse .viz-plot-card {
        order: 2;
    }

    .viz-title {
        font-size: 1.5rem;
    }

    .viz-plot-card {
        padding: 1rem;
    }



    /* CTA mobile */
    .cta-title {
        font-size: 1.8rem;
    }

    /* Footer mobile */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    /* Existing tool page styles */
    .app-container {
        padding: 1rem;
    }

    .logo-container {
        gap: 1rem;
    }

    .app-logo {
        max-height: 70px;
    }

    .logo-text-container h1 {
        font-size: 2.2rem;
    }

    .app-header .subtitle {
        font-size: 1rem;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }

    .step-dot {
        width: 38px;
        height: 38px;
        font-size: 0.85rem;
    }

    .step-line {
        width: 40px;
    }

    .card {
        padding: 1.25rem;
        border-radius: var(--radius-md);
    }

    .card-title {
        font-size: 1.1rem;
    }

    .card:hover {
        transform: none;
    }

    /* Params grid → single column on tablets */
    .params-grid {
        grid-template-columns: 1fr;
    }

    /* Button row stacks vertically */
    .btn-row {
        flex-direction: column;
        gap: 0.75rem;
    }

    .btn-row .btn {
        width: 100%;
    }

    .optimization-actions .opt-complete-inline,
    .optimization-buttons {
        width: 100%;
    }

    .optimization-buttons {
        gap: 0.5rem;
    }

    .optimization-buttons .btn {
        flex: 1;
        width: auto;
        padding-inline: 0.6rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    /* Download row stacks */
    .download-row {
        flex-direction: column;
    }

    .download-row .btn {
        width: 100%;
        justify-content: center;
    }

    /* Comparison table horizontal scroll */
    .comparison-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }


    /* Chart containers adapt */
    .chart-container {
        min-height: 280px;
    }

    /* Drop zone compact */
    .drop-zone {
        padding: 2rem 1.25rem;
    }

    .drop-zone .upload-icon {
        font-size: 2.2rem;
    }

    .drop-zone .upload-text {
        font-size: 0.9rem;
    }

    /* Pipeline steps */
    .pipeline-step {
        padding: 0.7rem 1rem;
        gap: 0.75rem;
    }

    /* Tooltips reposition for mobile */
    .info-icon:hover::after {
        left: auto;
        right: 0;
        transform: none;
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero-title {
        font-size: 1.7rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }


    .section-title {
        font-size: 1.5rem;
    }

    .setup-step-card,
    .opt-cockpit-panel,
    .opt-cockpit-chart-card,
    .opt-budget-card,
    .opt-budget-panel,
    .opt-advanced-card {
        padding: 1.25rem;
    }

    .opt-candidate-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .setup-stats-grid {
        grid-template-columns: 1fr;
    }

    .opt-advanced-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .btn-lg {
        padding: 0.8rem 1.75rem;
        font-size: 0.9rem;
    }

    .app-container {
        padding: 0.75rem;
    }

    .logo-container {
        flex-direction: column;
        gap: 0.5rem;
    }

    .app-logo {
        max-height: 60px;
    }

    .logo-text-container {
        text-align: center;
    }

    .logo-text-container h1 {
        font-size: 1.8rem;
    }

    .app-header .subtitle {
        font-size: 0.85rem;
    }

    .step-indicator {
        margin-bottom: 1.5rem;
    }

    .step-dot {
        width: 32px;
        height: 32px;
        font-size: 0.75rem;
    }

    .step-line {
        width: 24px;
    }

    .card {
        padding: 1rem;
        border-radius: var(--radius-sm);
    }

    .card-title {
        font-size: 1rem;
        gap: 0.4rem;
    }

    .card-title .icon {
        font-size: 1.1rem;
    }

    .stat-card {
        padding: 0.9rem;
    }

    .stat-value {
        font-size: 1.3rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    .btn {
        padding: 0.7rem 1.25rem;
        font-size: 0.85rem;
    }

    .drop-zone {
        padding: 1.5rem 1rem;
    }

    .drop-zone .upload-icon {
        font-size: 1.8rem;
        margin-bottom: 0.5rem;
    }

    .drop-zone .upload-text {
        font-size: 0.82rem;
    }

    .drop-zone .upload-hint {
        font-size: 0.72rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem 0.6rem;
        font-size: 0.78rem;
    }


    .threshold-control {
        padding: 1rem;
    }

    .validation-row {
        font-size: 0.82rem;
        padding: 0.5rem 0.75rem;
    }

    .target-list {
        font-size: 0.75rem;
        max-height: 140px;
    }

    .pipeline-step .step-text {
        font-size: 0.82rem;
    }

    .pipeline-step .step-detail {
        font-size: 0.7rem;
    }

    .pct-badge {
        font-size: 0.65rem;
        padding: 0.1rem 0.4rem;
    }
}


@media (min-width: 769px) {
    .navbar-mobile-menu.open {
        display: none;
    }
}

@media (max-width: 992px) and (min-width: 769px) {
    .navbar-inner {
        padding-inline: 1rem;
    }

    .nav-link {
        padding-inline: 0.55rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .step-indicator {
        justify-content: space-between;
        padding-inline: 1.5rem;
    }

    .step-line {
        flex: 1;
        min-width: 8px;
    }

    .step-label {
        font-size: 0.7rem;
    }

    .mode-tab-btn {
        padding: 0.65rem 0.5rem;
        font-size: 0.85rem;
    }

    .opt-budget-item {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .optimization-buttons .btn {
        gap: 0.3rem;
        padding-inline: 0.4rem;
        font-size: 0.75rem;
    }

    .optimization-buttons .btn-icon {
        font-size: 0.9rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }

    .hero-section .hero-particle {
        animation: none !important;
    }
}

/* Public session policy and bounded-list navigation. */
.workspace-header .session-notice {
    max-width: 70ch;
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 0.8rem;
}
.public-pagination {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 0.8rem;
}
.public-pagination .btn { padding: 6px 12px; font-size: 0.8rem; }