/* ── rocked — cyberpunk tunnel theme ──────────────────── */

:root {
    --bg: #0a0a0f;
    --bg-card: rgba(10, 10, 20, 0.75);
    --cyan: #00f0ff;
    --cyan-dim: rgba(0, 240, 255, 0.15);
    --cyan-glow: rgba(0, 240, 255, 0.4);
    --text: #c8ccd4;
    --text-dim: #5a5e6a;
    --green: #27c93f;
    --red: #ff5f56;
    --yellow: #ffbd2e;
    --font-display: 'Orbitron', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ── Scan lines overlay ─────────────────────────── */

.scanlines {
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        transparent 0px,
        transparent 2px,
        rgba(0, 0, 0, 0.04) 2px,
        rgba(0, 0, 0, 0.04) 4px
    );
    pointer-events: none;
    z-index: 100;
}

/* ── Tunnel background ──────────────────────────── */

.tunnel-bg {
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: -1;
}

.tunnel-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
}

.ring {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 140px;
    height: 90px;
    margin: -45px 0 0 -70px;
    border: 1px solid var(--cyan-dim);
    border-radius: 2px;
    animation: tunnel-expand 5s linear infinite;
    animation-delay: calc(var(--i) * -0.5s);
}

@keyframes tunnel-expand {
    0% {
        transform: scale(0.05);
        opacity: 0;
        border-color: rgba(0, 240, 255, 0.5);
    }
    15% {
        opacity: 0.8;
    }
    100% {
        transform: scale(18);
        opacity: 0;
        border-color: rgba(0, 240, 255, 0.01);
    }
}

.grid-floor {
    position: absolute;
    bottom: 0;
    left: -50%;
    width: 200%;
    height: 55%;
    background:
        linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px),
        linear-gradient(0deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(400px) rotateX(55deg);
    transform-origin: center top;
    mask-image: linear-gradient(to top, rgba(0,0,0,0.6), transparent 90%);
    -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.6), transparent 90%);
}

/* ── Vignette ───────────────────────────────────── */

.tunnel-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, var(--bg) 80%);
    pointer-events: none;
}

/* ── Fade-in animation ──────────────────────────── */

.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* stagger children */
.features-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.features-grid .fade-in:nth-child(3) { transition-delay: 0.2s; }
.features-grid .fade-in:nth-child(4) { transition-delay: 0.3s; }
.examples .fade-in:nth-child(2) { transition-delay: 0.1s; }
.examples .fade-in:nth-child(3) { transition-delay: 0.2s; }

/* ── Hero ───────────────────────────────────────── */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 2rem;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-pre {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1.2rem;
}

.logo {
    font-family: var(--font-display);
    font-size: clamp(4rem, 14vw, 11rem);
    font-weight: 900;
    color: var(--cyan);
    letter-spacing: 0.08em;
    line-height: 1;
    text-shadow:
        0 0 10px rgba(0, 240, 255, 0.9),
        0 0 40px rgba(0, 240, 255, 0.5),
        0 0 80px rgba(0, 240, 255, 0.25),
        0 0 120px rgba(0, 240, 255, 0.1);
    animation: glow-pulse 3s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
    from {
        text-shadow:
            0 0 10px rgba(0, 240, 255, 0.9),
            0 0 40px rgba(0, 240, 255, 0.5),
            0 0 80px rgba(0, 240, 255, 0.25);
    }
    to {
        text-shadow:
            0 0 15px rgba(0, 240, 255, 1),
            0 0 50px rgba(0, 240, 255, 0.6),
            0 0 100px rgba(0, 240, 255, 0.35),
            0 0 150px rgba(0, 240, 255, 0.15);
    }
}

.tagline {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: var(--text);
    margin-top: 1.5rem;
    letter-spacing: 0.05em;
}

.sub {
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-top: 0.8rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ── CTA Button ─────────────────────────────────── */

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-top: 2.5rem;
    padding: 0.85rem 2.4rem;
    border: 1px solid var(--cyan);
    color: var(--cyan);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: transparent;
    position: relative;
    overflow: hidden;
    transition: all 0.35s ease;
}

.cta-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--cyan);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.cta-btn:hover {
    color: var(--bg);
    box-shadow:
        0 0 20px var(--cyan-glow),
        0 0 60px rgba(0, 240, 255, 0.15);
}

.cta-btn:hover::before {
    opacity: 1;
}

.cta-text,
.cta-arrow {
    position: relative;
    z-index: 1;
}

.cta-arrow {
    transition: transform 0.35s ease;
}

.cta-btn:hover .cta-arrow {
    transform: translateX(4px);
}

/* ── Sections ───────────────────────────────────── */

.section {
    max-width: 900px;
    margin: 0 auto;
    padding: 6rem 2rem;
    position: relative;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.06em;
    margin-bottom: 2.5rem;
    text-align: center;
}

.title-decoration {
    color: var(--cyan);
    margin-right: 0.4rem;
}

/* ── Terminal ───────────────────────────────────── */

.terminal {
    max-width: 620px;
    margin: 0 auto;
    border: 1px solid rgba(0, 240, 255, 0.12);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(0, 240, 255, 0.08);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red { background: var(--red); }
.dot-yellow { background: var(--yellow); }
.dot-green { background: var(--green); }

.terminal-title {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

.terminal-body {
    display: flex;
    align-items: center;
    padding: 20px;
    gap: 12px;
}

.terminal-prompt {
    color: var(--green);
    font-weight: 700;
    user-select: none;
    flex-shrink: 0;
}

.terminal-body code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--cyan);
    flex: 1;
    word-break: break-all;
}

.copy-btn {
    flex-shrink: 0;
    padding: 6px 16px;
    background: transparent;
    border: 1px solid rgba(0, 240, 255, 0.25);
    color: rgba(0, 240, 255, 0.6);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.copy-btn:hover {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--cyan);
    color: var(--cyan);
}

.copy-btn.copied {
    border-color: var(--green);
    color: var(--green);
}

.note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 1.2rem;
}

/* ── Examples ───────────────────────────────────── */

.examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
}

.example {
    background: var(--bg-card);
    border: 1px solid rgba(0, 240, 255, 0.08);
    border-radius: 8px;
    padding: 1.4rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.example:hover {
    border-color: rgba(0, 240, 255, 0.25);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.05);
}

.example-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}

.example pre {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--cyan);
    white-space: nowrap;
    overflow-x: auto;
}

.example pre .terminal-prompt {
    margin-right: 0.6rem;
}

/* ── Features ───────────────────────────────────── */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.4rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 240, 255, 0.08);
    border-radius: 8px;
    padding: 2rem 1.6rem;
    text-align: center;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.feature-card:hover {
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.06);
    transform: translateY(-2px);
}

.feature-icon {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--cyan);
    margin-bottom: 1rem;
    text-shadow: 0 0 12px var(--cyan-glow);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.04em;
    margin-bottom: 0.6rem;
}

.feature-card p {
    font-size: 0.82rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ── Footer ─────────────────────────────────────── */

.footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem 2rem;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.3s ease;
}

.github-link:hover {
    color: var(--cyan);
}

.footer-sep {
    color: rgba(0, 240, 255, 0.15);
}

.footer-rust {
    letter-spacing: 0.05em;
}

/* ── Responsive ─────────────────────────────────── */

@media (max-width: 600px) {
    .section {
        padding: 4rem 1.2rem;
    }

    .terminal-body {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .terminal-body code {
        font-size: 0.78rem;
    }

    .copy-btn {
        align-self: flex-end;
    }

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

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

    .hero-pre {
        font-size: 0.7rem;
    }
}

/* ── Selection color ────────────────────────────── */

::selection {
    background: rgba(0, 240, 255, 0.25);
    color: #fff;
}

/* ── Scrollbar ──────────────────────────────────── */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 240, 255, 0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 240, 255, 0.3);
}