:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #7dd3fc;
    --accent: #f97316;
    --surface: #0b172a;
    --surface-soft: #111d33;
    --card-bg: #0f243f;
    --card-alt: #0f2a4f;
    --text-main: #e2e8f0;
    --text-light: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --nav-height: 70px;
    --grid-bg: var(--card-bg);
    --grid-line: var(--border);
    --input-bg: #1e293b;
}

[data-theme="light"] {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #0369a1;
    --accent: #f97316;
    --surface: #f8fafc;
    --surface-soft: #eef2ff;
    --card-bg: #ffffff;
    --card-alt: #f1f5f9;
    --text-main: #0f172a;
    --text-light: #475569;
    --border: rgba(15, 23, 42, 0.10);
    --shadow: 0 20px 60px rgba(2, 6, 23, 0.12);
    --success: #16a34a;
    --warning: #d97706;
    --error: #dc2626;
    --input-bg: #ffffff;
}

* {
    box-sizing: border-box;
}

input, select, textarea {
    background-color: var(--input-bg);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    font-family: inherit;
    font-size: 0.9rem;
}

input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--primary);
    border-color: transparent;
}

.skip-link {
    position: absolute;
    left: 14px;
    top: 10px;
    padding: 10px 14px;
    border-radius: 12px;
    background: rgba(12, 20, 35, 0.95);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.18);
    text-decoration: none;
    font-weight: 700;
    transform: translateY(-140%);
    transition: transform 0.15s ease;
    z-index: 40;
}

[data-theme="light"] .skip-link {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--border);
}

.skip-link:focus,
.skip-link:focus-visible {
    transform: translateY(0);
    outline: 3px solid rgba(125, 211, 252, 0.9);
    outline-offset: 2px;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Manrope', 'Space Grotesk', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
    background: radial-gradient(circle at 15% 20%, rgba(14, 165, 233, 0.15), transparent 35%),
        radial-gradient(circle at 85% 10%, rgba(249, 115, 22, 0.12), transparent 30%),
        linear-gradient(135deg, #050d18 0%, #0b1627 45%, #0f1f35 100%);
    padding: 24px 18px 80px;
    line-height: 1.6;
}

[data-theme="light"] body {
    background: radial-gradient(circle at 15% 20%, rgba(14, 165, 233, 0.18), transparent 35%),
        radial-gradient(circle at 85% 10%, rgba(249, 115, 22, 0.14), transparent 30%),
        linear-gradient(135deg, #f8fafc 0%, #eef2ff 55%, #f1f5f9 100%);
}

a {
    color: var(--primary-light);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.18em;
}

a:hover {
    color: #b5e3ff;
}

[data-theme="light"] a:hover {
    color: var(--primary-dark);
}

.container,
.lab-shell {
    max-width: 1400px;
    margin: 0 auto;
}

.card,
.lab-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
    box-shadow: var(--shadow);
}

.lab-card.soft {
    background: linear-gradient(145deg, rgba(14, 165, 233, 0.12), rgba(15, 37, 65, 0.8));
    border-color: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .lab-card.soft {
    background: linear-gradient(145deg, rgba(14, 165, 233, 0.10), rgba(255, 255, 255, 0.75));
    border-color: var(--border);
}

.lab-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    margin: -24px -18px 24px;
    width: calc(100% + 36px);
    backdrop-filter: blur(12px);
    background: rgba(8, 14, 26, 0.9);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .lab-nav {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(2, 6, 23, 0.05);
}

.lab-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--text-main);
    white-space: nowrap;
}

.lab-brand .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 18px rgba(14, 165, 233, 0.65);
}

.lab-brand-name {
    text-decoration: none;
    color: var(--text-main);
    font-size: 1.1rem;
}

.lab-divider {
    color: var(--text-light);
    opacity: 0.5;
}

.lab-current {
    color: var(--primary-light);
    font-weight: 600;
    display: none; /* Hide current page name on mobile/small screens if needed, or keep it */
}

@media (min-width: 768px) {
    .lab-current {
        display: inline-block;
    }
}

.lab-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
}

.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 36px;
    padding: 0 16px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    cursor: pointer;
    box-sizing: border-box;
    line-height: 1;
}

.pill:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border);
}

[data-theme="light"] .pill:hover {
    background: rgba(0, 0, 0, 0.05);
}

.pill.ghost {
    background: transparent;
    border-color: transparent;
}

select.pill {
    cursor: pointer;
    font: inherit;
    appearance: none;
    -webkit-appearance: none;
    padding-right: 16px; /* Balance padding since arrow is removed/hidden */
    text-align: center;
    text-align-last: center;
    background-color: transparent; /* Override global select bg */
}

select.pill option {
    background-color: var(--card-bg);
    color: var(--text-main);
}

.lab-nav select.pill {
    width: auto;
    min-width: 72px;
    max-width: 96px;
    flex: 0 0 auto;
}

.lab-nav select.pill option,
.lab-nav select.pill optgroup {
    background: var(--card-bg);
    color: var(--text-main);
}

[data-theme="light"] .pill {
    background: rgba(15, 23, 42, 0.03);
}

.pill:focus,
.pill:focus-visible,
button.pill:focus,
button.pill:focus-visible,
.btn:focus,
.btn:focus-visible,
button:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(125, 211, 252, 0.9);
    outline-offset: 2px;
}

h1,
h2,
h3,
h4,
[id] {
    scroll-margin-top: calc(var(--nav-height) + 18px);
}

.pill:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .pill:hover {
    border-color: rgba(15, 23, 42, 0.18);
    background: rgba(15, 23, 42, 0.06);
}

.pill.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    color: #0b1220;
    box-shadow: 0 12px 35px rgba(14, 165, 233, 0.35);
}

.pill.ghost {
    background: rgba(255, 255, 255, 0.04);
}

[data-theme="light"] .pill.ghost {
    background: rgba(15, 23, 42, 0.03);
}

.lab-tagbar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.tag {
    padding: 6px 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-light);
    border: 1px solid var(--border);
    font-size: 0.85rem;
}

[data-theme="light"] .tag {
    background: rgba(15, 23, 42, 0.03);
}

.hero {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 20px;
    align-items: stretch;
    margin-bottom: 26px;
}

.grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
    align-items: start;
}

@media (max-width: 1024px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 3vw, 3rem);
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.hero p {
    margin: 0;
    color: var(--text-light);
    max-width: 780px;
}

.hero .cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 18px;
}

.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.lab-tile {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 10px;
}

.lab-tile h3 {
    margin: 0;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.lab-tile p {
    margin: 0;
    color: var(--text-light);
}

.lab-tile .tile-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.lab-tile::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(249, 115, 22, 0.12));
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

.lab-tile:hover::after {
    opacity: 1;
}

.lab-tile > * {
    position: relative;
    z-index: 1;
}



.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-light);
    font-size: 0.85rem;
}

h1,
.h1,
header h1,
.card-header,
.lab-card h3,
.lab-card h4 {
    font-family: 'Space Grotesk', 'Manrope', system-ui, sans-serif;
}

.card-header,
.lab-card h4 {
    letter-spacing: 0.01em;
    color: var(--primary-light);
}

.btn,
.button-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #061020;
    transition: transform 0.1s ease, box-shadow 0.2s ease;
}

.btn:hover,
.button-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(14, 165, 233, 0.35);
}

.btn-secondary,
.button-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    border: 1px solid var(--border);
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 12px 0 10px;
    color: var(--text-main);
}

.section-title span {
    color: var(--text-light);
    font-size: 0.95rem;
}

.responsive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 16px;
}

@media (max-width: 920px) {
    body {
        padding: 16px 14px 90px;
    }
    .lab-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .hero {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }
}

/* Tabs */
.tab-header {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
    padding-bottom: 8px;
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-light);
    padding: 8px 12px;
    cursor: pointer;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.tab-btn:hover {
    background: var(--surface);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}