:root {
    --bg: #081122;
    --bg-soft: #0f1b33;
    --panel: rgba(15, 23, 42, 0.85);
    --panel-strong: #111c35;
    --text: #e5eefc;
    --muted: #9db0d1;
    --line: rgba(157, 176, 209, 0.18);
    --brand: #7c3aed;
    --brand-strong: #4f46e5;
    --brand-soft: rgba(124, 58, 237, 0.18);
    --success: #22c55e;
    --shadow: 0 30px 80px rgba(3, 7, 18, 0.45);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.28), transparent 30%),
        radial-gradient(circle at top right, rgba(79, 70, 229, 0.22), transparent 28%),
        linear-gradient(180deg, #081122 0%, #0a1328 40%, #060c19 100%);
    line-height: 1.6;
}

img {
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input {
    font: inherit;
}

.skip-link,
.visually-hidden {
    position: absolute;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    width: 1px;
    height: 1px;
    overflow: hidden;
    white-space: nowrap;
}

.skip-link:focus {
    clip: auto;
    clip-path: none;
    width: auto;
    height: auto;
    padding: 0.75rem 1rem;
    background: #ffffff;
    color: #111827;
    left: 1rem;
    top: 1rem;
    z-index: 1000;
    border-radius: 12px;
}

.container {
    width: min(calc(100% - 2rem), var(--container));
    margin: 0 auto;
    width: 90%;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
    background: rgba(8, 17, 34, 0.72);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-shell,
.footer-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.nav-shell {
    min-height: 76px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--muted);
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--brand) 0%, #22d3ee 100%);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 18px 40px rgba(124, 58, 237, 0.3);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-meta a:hover,
.footer-meta a:focus-visible {
    color: #ffffff;
}

.hero {
    padding: 2rem 0;
}

.section {
    padding: 4rem 0;

}

.section-alt {
    background: rgba(10, 18, 36, 0.65);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    gap: 2rem;
    align-items: center;
}

.eyebrow {
    margin: 0 0 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.8rem;
    font-weight: 700;
    color: #9cc2ff;
}

h1,
h2,
h3,
summary {
    line-height: 1.15;
}

h1 {
    margin: 0;
    font-size: clamp(2.7rem, 6vw, 4.8rem);
    letter-spacing: -0.04em;
}

h2 {
    margin: 0;
    font-size: clamp(2rem, 3vw, 3rem);
    letter-spacing: -0.03em;
}

h3 {
    margin: 0 0 0.75rem;
    font-size: 1.2rem;
}

.hero-text,
.section-heading p,
.card-copy,
.value-card p,
.faq-list p,
.footer-copy,
.focus-box p {
    color: var(--muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin: 2rem 0 1.4rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.85rem 1.25rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 700;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible,
.filter-button:hover,
.filter-button:focus-visible,
.card-link:hover,
.card-link:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
    box-shadow: 0 18px 45px rgba(79, 70, 229, 0.28);
}

.button-secondary {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.hero-points {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--muted);
}

.hero-points li+li {
    margin-top: 0.45rem;
}

.hero-panel,
.track-card,
.notebook-card,
.value-card,
.notice,
.faq-list details,
.timeline-item {
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: var(--shadow);
}

.hero-panel {
    margin-top: 24px;
    padding: 1.4rem;
    border-radius: var(--radius-lg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.stats-grid article,
.focus-box {
    padding: 1.2rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.stat-label {
    display: block;
    margin-top: 0.35rem;
    color: var(--muted);
}

.focus-box {
    margin-top: 1rem;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 2rem;
}

.curriculum-helper {
    margin-top: 0.5rem;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.split-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    max-width: none;
}

.results-count {
    color: var(--muted);
}

.track-grid,
.card-grid,
.value-grid,
.project-grid {
    display: grid;
    gap: 1.2rem;
}

.track-grid,
.value-grid,
.project-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.track-card,
.value-card,
.timeline-item,
.notebook-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.track-card {
    border-radius: var(--radius-lg);
    padding: 1.6rem;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    background: var(--panel);
    border: 1px solid var(--line);
}

.track-card-head {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.track-eyebrow {
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: #9cc2ff;
}

.track-metrics {
    display: flex;
    gap: 0.8rem;
    color: var(--muted);
    font-weight: 600;
}

.track-description {
    margin: 0;
    color: #d6e0ff;
}

.track-list {
    margin: 0;
    color: #b4c9ff;
    font-size: 0.95rem;
}

.project-card {
    border-radius: var(--radius-lg);
    background: var(--panel);
    border: 1px solid var(--line);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    min-height: 230px;
}

.project-card p {
    color: var(--muted);
    margin: 0;
}

.project-card a {
    margin-top: auto;
    align-self: flex-start;
}

.track-card,
.value-card,
.timeline-item {
    padding: 1.4rem;
}

.track-card .pill,
.meta-pill,
.section-pill,
.outcome-pill,
.filter-button {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    color: #d8e6ff;
    font-size: 0.9rem;
}

.track-card .pill-row,
.meta-row,
.section-row,
.outcome-row,
.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.search-field {
    flex: 1 1 320px;
}

.search-field input {
    width: 100%;
    min-height: 54px;
    padding: 0.95rem 1.1rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    color: #ffffff;
}

.search-field input::placeholder {
    color: #8ea3c8;
}

.filter-group {
    justify-content: flex-end;
}

.filter-button {
    cursor: pointer;
}

.filter-button[aria-pressed="true"] {
    background: var(--brand-soft);
    border-color: rgba(124, 58, 237, 0.5);
}

.card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.notebook-card {
    display: flex;
    flex-direction: column;
}

.card-accent {
    height: 7px;
    background: linear-gradient(90deg, #7c3aed 0%, #22d3ee 100%);
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.4rem;
}

.card-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: #d4ddf3;
}

.card-part {
    font-weight: 700;
    color: #a8c5ff;
}

.card-copy {
    margin: 0;
}

.meta-row {
    margin-top: 0.2rem;
}

.section-title {
    margin: 0 0 0.55rem;
    font-size: 0.95rem;
    color: #dbe8ff;
}

.section-row,
.outcome-row {
    margin-bottom: 0.2rem;
}

.section-pill {
    color: var(--muted);
}

.outcome-pill {
    background: rgba(34, 197, 94, 0.08);
    border-color: rgba(34, 197, 94, 0.24);
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: auto;
}

.card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.8rem 1rem;
    border-radius: 14px;
    font-weight: 700;
    transition: transform 0.2s ease, background 0.2s ease;
}

.card-link.primary {
    background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
}

.card-link.secondary {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.timeline {
    display: grid;
    gap: 1rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    align-items: start;
}

.timeline-step {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(34, 211, 238, 0.25));
    font-weight: 800;
}

.timeline-item p,
.track-card p {
    color: var(--muted);
    margin-bottom: 0;
}

.faq-list {
    display: grid;
    gap: 1rem;
}

.faq-list details {
    padding: 1rem 1.2rem;
    border-radius: var(--radius-md);
}

summary {
    cursor: pointer;
    font-weight: 700;
}

summary::-webkit-details-marker {
    display: none;
}

.notice {
    padding: 1rem 1.15rem;
    border-radius: 16px;
}

.site-footer {
    padding: 2rem 0 3rem;
}

.footer-copy {
    max-width: 580px;
    margin: 0.45rem 0 0;
}

.footer-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    color: var(--muted);
}

@media (max-width: 980px) {

    .hero-grid,
    .track-grid,
    .card-grid,
    .value-grid,
    .project-grid {
        grid-template-columns: 1fr;
    }

    .split-heading,
    .nav-shell,
    .footer-shell {
        align-items: flex-start;
        flex-direction: column;
    }

    .site-nav,
    .footer-meta {
        justify-content: flex-start;
    }
}

@media (max-width: 720px) {

    .hero,
    .section {
        padding: 4rem 0;
    }

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

    .timeline-item {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .container {
        width: min(calc(100% - 1.25rem), var(--container));
    }

    .site-nav {
        flex-wrap: wrap;
    }

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

    .hero-actions,
    .card-actions {
        flex-direction: column;
    }

    .card-link,
    .button {
        width: 100%;
    }
}