:root {
    --bg: #071014;
    --panel: rgba(255, 255, 255, 0.08);
    --panel-strong: rgba(255, 255, 255, 0.13);
    --text: #f3f7f5;
    --muted: #bdd0c9;
    --line: rgba(255, 255, 255, 0.16);
    --accent: #52d6b2;
    --accent-2: #f7c35f;
    --accent-3: #7fa7ff;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 18% 14%, rgba(82, 214, 178, 0.18), transparent 32rem),
        radial-gradient(circle at 82% 8%, rgba(247, 195, 95, 0.14), transparent 28rem),
        linear-gradient(135deg, #071014 0%, #10202a 48%, #14151c 100%);
    line-height: 1.6;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
}

#noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.05;
    background-image: linear-gradient(45deg, rgba(255,255,255,0.2) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.2) 25%, transparent 25%);
    background-size: 5px 5px;
    z-index: 1;
}

.cursor-glow,
.orb {
    display: none;
}

.glass-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid var(--line);
    background: rgba(7, 16, 20, 0.78);
    backdrop-filter: blur(18px);
}

.nav-content {
    width: min(1160px, calc(100% - 32px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    font-family: "Outfit", sans-serif;
    font-weight: 800;
    font-size: 1.08rem;
    letter-spacing: 0;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
    font-size: 0.92rem;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--text);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: var(--panel);
}

.fullscreen-section,
.content-section {
    position: relative;
    z-index: 2;
}

.fullscreen-section {
    min-height: calc(100vh - 72px);
    display: grid;
    place-items: center;
    padding: 80px 24px;
}

.hero-content {
    width: min(980px, 100%);
}

.subtitle {
    margin: 0 0 16px;
    color: var(--accent-2);
    font-family: "Outfit", sans-serif;
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 600;
}

.title,
.section-title {
    font-family: "Outfit", sans-serif;
    line-height: 1.02;
    letter-spacing: 0;
}

.title {
    margin: 0;
    max-width: 920px;
    font-size: clamp(3rem, 8vw, 7.5rem);
}

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

.description {
    max-width: 760px;
    margin: 28px 0 34px;
    color: var(--muted);
    font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    padding: 12px 18px;
    border: 1px solid transparent;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
}

.primary-btn {
    color: #071014;
    background: var(--accent);
}

.outline-btn {
    border-color: var(--line);
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.content-section {
    padding: 96px 0;
}

.container {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
}

.section-title {
    margin: 0 0 34px;
    font-size: clamp(2.1rem, 5vw, 4.2rem);
}

.grid-2,
.grid-3 {
    display: grid;
    gap: 18px;
}

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

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.glass-card,
.method-card,
.hub-card,
.model-stage,
.rq-item,
.step,
.stage-card,
.framework-card,
.timeline-content,
.split-pane,
.terminal-window,
.threat-box {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.glass-card,
.method-card,
.model-stage,
.step,
.stage-card,
.framework-card,
.timeline-content,
.split-pane,
.threat-box {
    padding: 26px;
}

.glass-card h3,
.method-card h3,
.hub-category h3,
.model-stage h3,
.step h3,
.stage-card h3,
.framework-card h3,
.timeline-content h3,
.split-pane h3 {
    margin: 0 0 12px;
    font-family: "Outfit", sans-serif;
    line-height: 1.2;
}

.glass-card p,
.method-card p,
.model-stage p,
.step p,
.stage-card p,
.framework-card p,
.timeline-content p,
.split-pane p,
.threat-box p,
.section-subtitle {
    color: var(--muted);
}

.card-icon,
.hub-icon {
    color: var(--accent-2);
    font-size: 1.6rem;
}

.mt-5 {
    margin-top: 48px;
}

.mt-4 {
    margin-top: 32px;
}

.dark-alt {
    background: rgba(0, 0, 0, 0.14);
}

.section-subtitle {
    max-width: 780px;
    margin: -18px 0 36px;
    font-size: 1.08rem;
}

.research-questions {
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
}

.rq-list {
    display: grid;
    gap: 14px;
}

.rq-item {
    display: grid;
    grid-template-columns: 76px 1fr;
    align-items: start;
    gap: 18px;
    padding: 18px;
}

.rq-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    border-radius: 8px;
    color: #071014;
    background: var(--accent-2);
    font-weight: 800;
}

.theory-map,
.flow-diagram,
.data-flow {
    display: grid;
    gap: 18px;
}

.theory-map {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ecology-stages,
.framework-grid,
.split-view,
.hub-grid {
    display: grid;
    gap: 18px;
}

.ecology-stages {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

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

.hub-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.stage-num,
.stage-badge,
.icon-wrap,
.threat-icon {
    color: var(--accent-2);
    font-weight: 800;
}

.stage-num {
    margin-bottom: 12px;
    font-size: 1.4rem;
}

.stage-badge {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 6px 9px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.78rem;
    background: rgba(255,255,255,0.08);
}

.danger-card .stage-badge,
.text-red {
    color: #ff9b9b;
}

.highlight-card,
.highlight-border {
    border-color: rgba(82, 214, 178, 0.45);
}

.threat-box {
    display: grid;
    grid-template-columns: 54px 1fr;
    gap: 18px;
    align-items: start;
}

.threat-icon,
.icon-wrap,
.pane-header i {
    font-size: 1.7rem;
}

.timeline {
    position: relative;
    display: grid;
    gap: 18px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 24px 1fr;
    gap: 14px;
}

.timeline-dot {
    width: 16px;
    height: 16px;
    margin-top: 30px;
    border-radius: 999px;
    background: var(--accent);
}

.pane-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.feature-list {
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
    color: var(--muted);
}

.feature-list i,
.text-green {
    color: var(--accent);
}

.terminal-window {
    overflow: hidden;
    background: rgba(2, 7, 10, 0.86);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(255,255,255,0.07);
}

.mac-btns {
    display: flex;
    gap: 6px;
}

.mac-btns span {
    width: 11px;
    height: 11px;
    border-radius: 999px;
    background: var(--accent-2);
}

.terminal-body {
    padding: 22px;
    overflow-x: auto;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.94rem;
}

.code-line {
    min-width: 720px;
    color: #d9eee7;
}

.prompt,
.cmd,
.text-blue {
    color: var(--accent-3);
}

.theory-node,
.flow-node,
.data-node {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.07);
}

.arrow,
.flow-arrow {
    align-self: center;
    justify-self: center;
    color: var(--accent);
    font-size: 1.5rem;
}

.framework-list,
.hub-links,
.method-grid {
    display: grid;
    gap: 16px;
}

.hub-category {
    margin-top: 36px;
}

.hub-card {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 18px;
    padding: 20px;
    text-decoration: none;
    transition: transform 160ms ease, background 160ms ease;
}

.hub-card:hover,
.hub-card:focus {
    transform: translateY(-2px);
    background: var(--panel-strong);
}

.hub-card h4,
.hub-card p {
    margin: 0;
}

.hub-card p {
    color: var(--muted);
}

footer {
    position: relative;
    z-index: 2;
    padding: 44px 0;
    border-top: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.18);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.copyright {
    margin-top: 24px;
    color: var(--muted);
    font-size: 0.9rem;
}

.fade-up {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .fade-up {
        opacity: 0;
        transform: translateY(16px);
        transition: opacity 500ms ease, transform 500ms ease;
    }

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

@media (max-width: 860px) {
    .nav-content {
        min-height: 64px;
    }

    .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links {
        position: fixed;
        inset: 64px 0 auto 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 18px;
        border-bottom: 1px solid var(--line);
        background: rgba(7, 16, 20, 0.96);
    }

    .nav-links.is-open {
        display: flex;
    }

    .nav-links a {
        padding: 12px;
        border-radius: 8px;
        background: rgba(255,255,255,0.05);
    }

    .grid-2,
    .grid-3,
    .theory-map,
    .ecology-stages,
    .framework-grid,
    .split-view,
    .hub-grid {
        grid-template-columns: 1fr;
    }

    .rq-item,
    .hub-card {
        grid-template-columns: 1fr;
    }

    .footer-content {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 520px) {
    .fullscreen-section,
    .content-section {
        padding-left: 0;
        padding-right: 0;
    }

    .title {
        font-size: 2.8rem;
    }
}