*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --c-bg: #080808;
    --c-surface: #0f0f0f;
    --c-card: #141414;
    --c-border: rgba(255, 255, 255, 0.07);
    --c-accent: #b22222;
    --c-accent-h: #cc2929;
    --c-text: #f0f0f0;
    --c-muted: #707070;
    --c-dim: #303030;
    --f-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --f-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 14px;
    --nav-h: 68px;
    --max-w: 1160px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--f-body);
    background: var(--c-bg);
    color: var(--c-text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    font-size: 16px;
    line-height: 1.6;
}

img {
    display: block;
    max-width: 100%;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px;
}

.container--wide {
    max-width: 1340px;
}

/* NAV */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 100;
    border-bottom: 1px solid var(--c-border);
    background: rgba(8, 8, 8, 0.85);
    backdrop-filter: blur(16px);
    transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.nav--scrolled {
    background: rgba(8, 8, 8, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 32px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.05rem;
    flex-shrink: 0;
}

.nav__logo {
    height: 28px;
}

.nav__links {
    display: flex;
    gap: 28px;
    flex: 1;
}

.nav__links a {
    font-size: 0.9rem;
    color: var(--c-muted);
    font-weight: 500;
    transition: color 0.2s;
}

.nav__links a:hover {
    color: var(--c-text);
}

.nav__cta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    padding: 8px 16px;
    border-radius: var(--r-sm);
    transition: background 0.2s, border-color 0.2s;
    flex-shrink: 0;
}

.nav__cta:hover {
    background: var(--c-dim);
    border-color: rgba(255, 255, 255, 0.15);
}

.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 102;
}

.nav__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--c-text);
    transition: transform 0.3s, opacity 0.3s;
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 32px;
    position: relative;
}

.hero__content {
    text-align: center;
    max-width: 820px;
    width: 100%;
}

.hero__icon {
    height: 180px;
    margin: 0 auto 40px;
    filter: drop-shadow(0 12px 40px rgba(178, 34, 34, 0.45));
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.08;
    color: #fff;
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--c-muted);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.hero__scroll {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--c-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--c-border);
    transition: color 0.2s, border-color 0.2s, transform 0.2s;
    animation: bounce 2.5s ease-in-out infinite;
}

.hero__scroll:hover {
    color: var(--c-text);
    border-color: rgba(255, 255, 255, 0.2);
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(6px);
    }
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--r-sm);
    padding: 12px 24px;
    transition: all 0.2s;
    cursor: pointer;
}

.btn--primary {
    background: var(--c-accent);
    color: #fff;
    border: 1px solid transparent;
}

.btn--primary:hover {
    background: var(--c-accent-h);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(178, 34, 34, 0.35);
}

.btn--outline {
    background: transparent;
    color: var(--c-text);
    border: 1px solid var(--c-border);
}

.btn--outline:hover {
    background: var(--c-card);
    border-color: rgba(255, 255, 255, 0.15);
}

.badge {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--c-muted);
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: 100px;
    padding: 7px 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.badge:hover {
    color: var(--c-text);
    background: var(--c-dim);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
}

.badge__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-accent);
    box-shadow: 0 0 10px var(--c-accent);
}

/* HERO PREVIEW */
.hero__preview {
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    overflow: hidden;
    border: 1px solid var(--c-border);
    border-bottom: none;
    box-shadow: 0 -1px 0 rgba(255, 255, 255, 0.05) inset, 0 40px 80px rgba(0, 0, 0, 0.6);
    background: var(--c-surface);
}

/* BROWSER CHROME */
.browser-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 12px 16px;
    background: #141414;
    border-bottom: 1px solid var(--c-border);
}

.dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot--red {
    background: #ff5f56;
}

.dot--yellow {
    background: #ffbd2e;
}

.dot--green {
    background: #27c93f;
}

.browser-url {
    font-size: 0.78rem;
    color: var(--c-muted);
    background: #1e1e1e;
    border: 1px solid var(--c-border);
    border-radius: 4px;
    padding: 4px 12px;
    margin: 0 auto;
}

.browser-body img {
    width: 100%;
    display: block;
}

/* ── PREVIEW SECTION ── */
.preview-section {
    padding: 96px 0;
    border-bottom: 1px solid var(--c-border);
}

.preview-block {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 56px;
    align-items: center;
    margin-bottom: 96px;
}

.preview-block:last-child {
    margin-bottom: 0;
}

.preview-block--reverse {
    grid-template-columns: 340px 1fr;
}

.preview-block--reverse .preview-block__frame {
    order: 2;
}

.preview-block--reverse .preview-block__meta {
    order: 1;
}

.preview-block__frame {
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
    background: var(--c-card);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.04) inset,
        0 32px 80px rgba(0, 0, 0, 0.6);
}

.preview-block__meta {
    padding: 8px 0;
}

.preview-block__meta h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    line-height: 1.3;
}

.preview-block__meta>p {
    font-size: 0.95rem;
    color: var(--c-muted);
    line-height: 1.75;
    margin-bottom: 28px;
}

/* Spotlight panel: large image + metadata sidebar */
.gallery-spotlight {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.gallery-frame {
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
    background: var(--c-card);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04) inset, 0 32px 80px rgba(0, 0, 0, 0.7);
}

.gallery-frame .browser-body img {
    border-radius: 0;
}

.gallery-meta {
    padding-top: 8px;
}

.gallery-meta__label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: 12px;
}

.gallery-meta h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    line-height: 1.3;
}

.gallery-meta p {
    font-size: 0.9rem;
    color: var(--c-muted);
    line-height: 1.7;
    margin-bottom: 24px;
}

.gallery-meta__features {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.gallery-feat {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--c-muted);
}

.gallery-feat__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-accent);
    flex-shrink: 0;
    margin-top: 6px;
}

/* Thumbnail strip */
.gallery-thumbs {
    display: flex;
    gap: 12px;
    max-width: 1200px;
    margin: 32px auto 0;
    padding: 0 32px;
    overflow-x: auto;
}

.gallery-thumb {
    flex-shrink: 0;
    width: 160px;
    cursor: pointer;
    border-radius: var(--r-md);
    overflow: hidden;
    border: 2px solid var(--c-border);
    transition: border-color 0.2s, transform 0.2s;
    opacity: 0.55;
    transition: all 0.25s;
}

.gallery-thumb:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.gallery-thumb.active {
    border-color: var(--c-accent);
    opacity: 1;
}

.gallery-thumb img {
    width: 100%;
    display: block;
}

.gallery-thumb-label {
    font-size: 0.75rem;
    color: var(--c-muted);
    font-weight: 500;
    padding: 8px 10px;
    background: var(--c-card);
    border-top: 1px solid var(--c-border);
    text-align: center;
}

/* SECTIONS */
.section {
    padding: 96px 0;
    border-bottom: 1px solid var(--c-border);
}

.section--dark {
    background: var(--c-surface);
}

.section__header {
    text-align: center;
    margin-bottom: 64px;
}

.section__label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: 14px;
}

.section__header h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #fff;
    max-width: 640px;
    margin: 0 auto 20px;
    line-height: 1.15;
}

.section__desc {
    font-size: 1.1rem;
    color: var(--c-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* FEATURES */
.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    overflow: hidden;
}

.feature {
    padding: 40px;
    display: flex;
    gap: 20px;
    background: var(--c-card);
    opacity: 0;
    transform: translateY(24px);
    transition: background 0.3s, opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature:hover {
    background: #191919;
}

.feature__icon {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    background: rgba(178, 34, 34, 0.12);
    border-radius: var(--r-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-accent);
    margin-top: 2px;
}

.feature__body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.feature__body p {
    font-size: 0.95rem;
    color: var(--c-muted);
    line-height: 1.7;
}

/* ARCHITECTURE - larger */
.arch-wrap {
    padding: 96px 0;
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
}

.arch-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 56px;
    align-items: start;
}

.arch-diagram {
    background: #000;
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    padding: 56px 40px;
    display: flex;
    justify-content: center;
    min-height: 440px;
    align-items: center;
}

/* Make mermaid diagram larger */
.arch-diagram .mermaid {
    width: 100%;
}

.arch-diagram svg {
    max-width: 100% !important;
    font-size: 15px !important;
}

.arch-layers {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    overflow: hidden;
}

.layer {
    padding: 32px 36px;
    border-bottom: 1px solid var(--c-border);
    opacity: 0;
    transform: translateX(16px);
    transition: opacity 0.5s ease, transform 0.5s ease, background 0.3s;
}

.layer:last-child {
    border-bottom: none;
}

.layer.visible {
    opacity: 1;
    transform: translateX(0);
}

.layer:hover {
    background: var(--c-card);
}

.layer h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.layer p {
    font-size: 0.88rem;
    color: var(--c-muted);
    line-height: 1.6;
}

/* STACK */
.stack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--c-border);
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    overflow: hidden;
}

.stack-item {
    background: var(--c-card);
    padding: 32px;
    opacity: 0;
    transform: translateY(10px);
    transition: background 0.3s, opacity 0.4s ease, transform 0.4s ease;
}

.stack-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.stack-item:hover {
    background: #191919;
}

.stack-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.stack-item p {
    font-size: 0.85rem;
    color: var(--c-muted);
}

/* STEPS */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.step {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step__num {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--c-accent);
    display: block;
    margin-bottom: 12px;
}

.step h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.step p {
    font-size: 0.88rem;
    color: var(--c-muted);
    margin-bottom: 14px;
    line-height: 1.6;
}

.step pre {
    background: #000;
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    padding: 12px 16px;
    overflow-x: auto;
}

.step code {
    font-family: var(--f-mono);
    font-size: 0.8rem;
    color: #ccc;
}

.contribute__footer {
    text-align: center;
}

/* CONTRIBUTORS */
.contributors-section {
    border-bottom: 1px solid var(--c-border);
}

.contributors-display {
    display: flex;
    justify-content: center;
}

.contributors-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    cursor: pointer;
}

.contributors-img {
    max-width: 600px;
    width: 100%;
    border-radius: 8px;
    filter: grayscale(0.2);
    transition: filter 0.3s, transform 0.3s;
}

.contributors-link:hover .contributors-img {
    filter: grayscale(0);
    transform: scale(1.02);
}

.contributors-cta {
    font-size: 0.9rem;
    color: var(--c-muted);
    font-weight: 500;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 2px;
    transition: color 0.2s, border-color 0.2s;
}

.contributors-link:hover .contributors-cta {
    color: var(--c-accent);
    border-color: var(--c-accent);
}

/* FOOTER */
.footer {
    padding: 48px 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--c-border);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1rem;
}

.footer__links {
    display: flex;
    gap: 28px;
}

.footer__links a {
    font-size: 0.88rem;
    color: var(--c-muted);
    font-weight: 500;
    transition: color 0.2s;
}

.footer__links a:hover {
    color: var(--c-text);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__bottom p {
    font-size: 0.85rem;
    color: #444;
}

.footer__bottom a {
    font-size: 0.85rem;
    color: var(--c-muted);
    font-weight: 500;
    transition: color 0.2s;
}

.footer__bottom a:hover {
    color: var(--c-text);
}

/* REPOSITORY STATS */
.repo-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 40px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.5s ease;
}

.repo-stats.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--c-muted);
    font-weight: 500;
    padding: 6px 12px;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    transition: all 0.2s;
}

.stat-item:hover {
    color: var(--c-text);
    border-color: rgba(255, 255, 255, 0.15);
    background: var(--c-dim);
}

.stat-item svg {
    color: var(--c-accent);
}

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

    .gallery-spotlight {
        grid-template-columns: 1fr;
    }

    .gallery-meta {
        padding-top: 0;
    }

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

    .preview-block,
    .preview-block--reverse {
        grid-template-columns: 1fr;
    }

    .preview-block--reverse .preview-block__frame {
        order: 1;
    }

    .preview-block--reverse .preview-block__meta {
        order: 2;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--c-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        transition: right 0.3s ease;
        z-index: 101;
    }

    .nav.nav--open .nav__links {
        right: 0;
    }

    .nav__hamburger {
        display: flex;
    }

    /* Hamburger transform to X */
    .nav.nav--open .nav__hamburger span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav.nav--open .nav__hamburger span:nth-child(2) {
        opacity: 0;
    }

    .nav.nav--open .nav__hamburger span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .nav__inner {
        gap: 16px;
        justify-content: space-between;
    }

    .nav__cta {
        display: none;
    }

    .hero {
        padding-left: 20px;
        padding-right: 20px;
    }

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

    .hero__actions {
        flex-direction: column;
    }
    .hero__icon {
        height: 120px;
        margin-bottom: 24px;
    }

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

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

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

    .footer__inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .footer__links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .gallery-spotlight {
        padding: 0 20px;
    }

    .gallery-thumbs {
        padding: 0 20px;
    }
}