:root {
    --bg-main: #030806;
    --bg-elevated: #08120e;
    --bg-soft: #0c1a15;
    --panel: rgba(11, 24, 19, 0.82);
    --panel-strong: rgba(8, 18, 14, 0.95);
    --text: #e6ffe7;
    --muted: #95c7a2;
    --line: rgba(64, 145, 89, 0.35);
    --line-strong: rgba(90, 226, 128, 0.55);
    --accent: #55ff9e;
    --accent-strong: #33d17a;
    --accent-hot: #7efcc2;
    --danger: #ff5c73;
    --warning: #f5e663;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --container: 1180px;
    --transition: 220ms ease;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: "IBM Plex Mono", "Consolas", "Liberation Mono", monospace;
    line-height: 1.6;
    background:
        radial-gradient(circle at 10% 10%, rgba(80, 255, 160, 0.08), transparent 36%),
        radial-gradient(circle at 88% 16%, rgba(61, 213, 124, 0.09), transparent 30%),
        linear-gradient(120deg, rgba(13, 44, 31, 0.45), rgba(1, 8, 5, 0.95) 55%),
        repeating-linear-gradient(90deg, rgba(101, 230, 147, 0.04) 0 1px, transparent 1px 56px),
        var(--bg-main);
    position: relative;
    min-height: 100vh;
}

/* Ambient CRT glow and scanline pass. */
body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

body::before {
    background:
        radial-gradient(circle at 50% 0%, rgba(85, 255, 158, 0.08), transparent 62%),
        linear-gradient(transparent 50%, rgba(19, 33, 27, 0.28) 50%);
    background-size: 100% 100%, 100% 4px;
    mix-blend-mode: screen;
    opacity: 0.42;
}

body::after {
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.18), transparent 3%, transparent 97%, rgba(0, 0, 0, 0.18)),
        radial-gradient(circle at 50% 120%, rgba(85, 255, 158, 0.12), transparent 45%);
    opacity: 0.55;
}

main,
.site-header,
.site-footer {
    position: relative;
    z-index: 1;
}

img {
    max-width: 100%;
}

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

button,
input {
    font: inherit;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.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: 0.7rem 1rem;
    background: #d8ffe8;
    color: #02220f;
    left: 1rem;
    top: 1rem;
    z-index: 999;
    border-radius: 10px;
}

.container {
    width: 90%;
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(5, 13, 10, 0.94), rgba(5, 13, 10, 0.72));
}

.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: 0.85rem;
}

.brand strong,
.brand small {
    display: block;
    line-height: 1.2;
}

.brand strong {
    font-family: "Chakra Petch", "Trebuchet MS", sans-serif;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.brand small {
    color: var(--muted);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background:
        linear-gradient(140deg, rgba(24, 50, 35, 0.92), rgba(14, 25, 20, 0.96)),
        var(--bg-soft);
    border: 1px solid var(--line-strong);
    color: var(--accent-hot);
    font-weight: 700;
    box-shadow: inset 0 0 0 1px rgba(85, 255, 158, 0.15), 0 14px 30px rgba(0, 0, 0, 0.42);
}

.site-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.9rem;
}

.site-nav a,
.footer-meta a {
    color: var(--muted);
    font-size: 0.88rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    transition: color var(--transition), text-shadow var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-meta a:hover,
.footer-meta a:focus-visible {
    color: var(--accent-hot);
    text-shadow: 0 0 12px rgba(85, 255, 158, 0.35);
}

.hero {
    padding: 4rem 0 2.2rem;
}

.section {
    padding: 4.3rem 0;
}

.section-alt {
    border-top: 1px solid rgba(85, 255, 158, 0.15);
    border-bottom: 1px solid rgba(85, 255, 158, 0.15);
    background: linear-gradient(180deg, rgba(8, 18, 14, 0.85), rgba(8, 15, 12, 0.58));
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    gap: 1.6rem;
    align-items: stretch;
}

.eyebrow {
    margin: 0 0 0.85rem;
    font-size: 0.75rem;
    letter-spacing: 0.17em;
    text-transform: uppercase;
    color: var(--warning);
}

h1,
h2,
h3,
summary {
    font-family: "Chakra Petch", "Trebuchet MS", sans-serif;
    letter-spacing: 0.01em;
    line-height: 1.15;
    margin-top: 0;
}

h1 {
    margin-bottom: 0;
    font-size: clamp(2.35rem, 5vw, 4.6rem);
    text-transform: uppercase;
}

h2 {
    font-size: clamp(1.8rem, 3.4vw, 3rem);
    text-transform: uppercase;
    margin-bottom: 0;
}

h3 {
    font-size: 1.25rem;
    margin: 0;
}

.hero-text,
.section-heading p,
.card-copy,
.value-card p,
.faq-list p,
.footer-copy,
.focus-box p,
.track-description,
.project-card p,
.notice p,
.timeline-item p,
.curriculum-helper {
    color: var(--muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1.9rem 0 1.3rem;
}

.button,
.card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.82rem 1.05rem;
    border-radius: 10px;
    border: 1px solid transparent;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

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

.button-primary,
.card-link.primary {
    background: linear-gradient(160deg, rgba(50, 164, 103, 0.9), rgba(21, 91, 59, 0.96));
    border-color: rgba(126, 252, 194, 0.45);
    color: #deffe9;
    box-shadow: inset 0 0 0 1px rgba(134, 255, 200, 0.18), 0 14px 30px rgba(0, 0, 0, 0.45);
}

.button-secondary,
.card-link.secondary {
    background: rgba(9, 20, 15, 0.7);
    border-color: var(--line);
    color: var(--text);
}

.hero-points {
    margin: 0;
    padding-left: 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,
.project-card {
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(11, 24, 19, 0.86), rgba(7, 16, 13, 0.9));
    box-shadow: var(--shadow);
}

.hero-panel {
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
}

.hero-panel::before {
    content: "system-monitor";
    position: absolute;
    top: 0.9rem;
    right: 1rem;
    font-size: 0.69rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(126, 252, 194, 0.65);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.stats-grid article,
.focus-box {
    border-radius: var(--radius-md);
    border: 1px solid rgba(98, 240, 153, 0.25);
    background: rgba(10, 22, 17, 0.78);
    padding: 1rem;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-hot);
    text-shadow: 0 0 14px rgba(126, 252, 194, 0.25);
}

.stat-label {
    display: block;
    margin-top: 0.25rem;
    color: var(--muted);
}

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

.section-heading {
    max-width: 70%;
    margin-bottom: 2rem;
}

.curriculum-helper {
    margin-top: 0.5rem;
    font-size: 0.94rem;
}

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

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

.track-grid,
.card-grid,
.value-grid,
.project-grid {
    display: grid;
    gap: 1rem;
}

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

.track-card,
.value-card,
.timeline-item,
.notebook-card,
.project-card {
    overflow: hidden;
}

.track-card,
.value-card,
.timeline-item,
.project-card {
    padding: 1.25rem;
}

.track-card {
    min-height: 270px;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.track-card-head {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.track-eyebrow {
    margin: 0;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--warning);
}

.track-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.track-metrics span,
.meta-pill,
.section-pill,
.outcome-pill,
.filter-button {
    display: inline-flex;
    align-items: center;
    padding: 0.37rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(90, 226, 128, 0.32);
    background: rgba(11, 24, 19, 0.85);
    color: #b8f8cf;
    font-size: 0.84rem;
}

.track-list {
    margin: 0;
    font-size: 0.92rem;
    color: #b9debf;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-bottom: 1.25rem;
}

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

.search-field input {
    width: 100%;
    min-height: 50px;
    border-radius: 10px;
    border: 1px solid rgba(90, 226, 128, 0.35);
    background: rgba(8, 18, 14, 0.9);
    color: var(--text);
    padding: 0.85rem 1rem;
}

.search-field input::placeholder {
    color: #7eb58d;
}

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

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

.filter-button {
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.filter-button[aria-pressed="true"] {
    border-color: var(--line-strong);
    background: rgba(44, 132, 84, 0.36);
    color: #deffe9;
}

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

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

.card-accent {
    height: 4px;
    background: linear-gradient(90deg, var(--accent-strong), var(--accent-hot), #daf6a8, var(--accent-strong));
    background-size: 200% 100%;
    animation: accent-flow 4.5s linear infinite;
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: 0.95rem;
    padding: 1.2rem;
    height: 100%;
}

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

.card-part {
    color: var(--warning);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.section-title {
    margin: 0 0 0.5rem;
    color: #c8fdd5;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    font-size: 0.78rem;
}

.section-pill {
    color: #a4d8b2;
}

.outcome-pill {
    border-color: rgba(245, 230, 99, 0.42);
    color: #f4f5b7;
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: auto;
}

.timeline {
    display: grid;
    gap: 0.85rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: start;
    gap: 0.95rem;
}

.timeline-step {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(63, 202, 119, 0.38), rgba(22, 65, 44, 0.82));
    border: 1px solid rgba(126, 252, 194, 0.42);
    color: #e3ffe9;
    font-weight: 700;
}

.faq-list {
    display: grid;
    gap: 0.8rem;
}

.faq-list details {
    padding: 1rem 1.1rem;
}

summary {
    cursor: pointer;
    font-size: 1.08rem;
}

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

summary::after {
    content: ">";
    float: right;
    color: var(--accent);
}

details[open] summary::after {
    content: "v";
}

.notice {
    padding: 1rem 1.1rem;
}

.project-card {
    min-height: 210px;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

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

.related-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.8rem;
}

.related-list a {
    display: block;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--panel);
    padding: 0.9rem 1rem;
    color: #c7f7d5;
    transition: border-color var(--transition), color var(--transition), transform var(--transition);
}

.related-list a:hover,
.related-list a:focus-visible {
    border-color: var(--line-strong);
    color: #ecfff1;
    transform: translateX(3px);
}

.site-footer {
    padding: 2.1rem 0 2.6rem;
    border-top: 1px solid var(--line);
    background: rgba(5, 13, 10, 0.7);
}

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

.footer-meta {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.95rem;
    color: var(--muted);
}

/* Shared 404 styling */
.error-shell {
    max-width: 720px;
    margin: 4rem auto;
    text-align: center;
}

.breadcrumbs {
    text-align: left;
    margin-bottom: 1rem;
}

.breadcrumbs ol {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--muted);
}

.breadcrumbs a {
    color: #ccf9d9;
}

.error-title {
    font-size: clamp(2.4rem, 8vw, 4rem);
    margin-bottom: 1rem;
}

.error-actions {
    justify-content: center;
    margin-bottom: 0;
}

/* Progressive reveal for sections and generated cards. */
.reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 480ms ease, transform 480ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes accent-flow {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 200% 50%;
    }
}

@media (max-width: 1040px) {

    .hero-grid,
    .track-grid,
    .value-grid,
    .project-grid,
    .card-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 {
        padding-top: 3rem;
    }

    .section {
        padding: 3.5rem 0;
    }

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

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

@media (max-width: 560px) {
    .container {
        width: min(calc(100% - 1.1rem), var(--container));
    }

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

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

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

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

    .reveal {
        opacity: 1;
        transform: none;
    }
}