/* nanokern — retro systems / bios / vga */

:root {
    --bg: #0f0f12;
    --bg-2: #15151a;
    --bg-3: #1c1c22;
    --ink: #e4ecff;
    --ink-dim: #7d8ba0;
    --ink-faint: #4a5368;
    --blue: #4d8bf0;
    --blue-2: #5a6fc7;
    --blue-deep: #1e3a7a;
    --cyan: #55ffff;
    --ok: #7dd87d;
    --border: #2a2d38;
    --border-2: #373a47;
}

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

html, body {
    background: var(--bg);
    color: var(--ink);
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg);
    background-image:
        radial-gradient(circle at 1px 1px, rgba(77, 139, 240, 0.06) 1px, transparent 0);
    background-size: 22px 22px;
    min-height: 100vh;
}

code { font-family: 'JetBrains Mono', monospace; color: var(--cyan); font-size: 0.92em; }
a { color: inherit; text-decoration: none; }

.page { max-width: 1080px; margin: 0 auto; padding: 0 28px; }

/* nav */
.nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 22px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 56px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 500; color: var(--ink); }
.nav-logo span { font-size: 13px; letter-spacing: 0.02em; }
.nav-right { display: flex; align-items: center; gap: 22px; }
.nav-link { color: var(--ink-dim); font-size: 13px; transition: color 0.15s; }
.nav-link:hover { color: var(--cyan); }
.nav-cta {
    background: var(--blue);
    color: #fff;
    padding: 7px 16px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--blue);
    transition: background 0.15s;
}
.nav-cta:hover { background: #5c99f5; }

/* hero */
.hero { padding: 40px 0 72px; }
.hero-inner { max-width: 860px; }
.hero-kicker {
    color: var(--ink-dim);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: lowercase;
    margin-bottom: 22px;
    padding-bottom: 10px;
    border-bottom: 1px dashed var(--border-2);
    display: inline-block;
    padding-right: 18px;
}
.hero-title {
    font-family: 'Space Grotesk', 'JetBrains Mono', sans-serif;
    font-weight: 500;
    font-size: clamp(34px, 5vw, 56px);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: #eef3ff;
    margin-bottom: 26px;
}
.hero-title .accent {
    color: var(--cyan);
    text-shadow: 0 0 12px rgba(85, 255, 255, 0.35);
}
.hero-sub {
    color: var(--ink-dim);
    font-size: 15px;
    line-height: 1.75;
    margin-bottom: 32px;
    max-width: 720px;
}
.hero-cta-row { display: flex; gap: 14px; margin-bottom: 44px; flex-wrap: wrap; }

.btn {
    display: inline-block;
    padding: 11px 22px;
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    border: 1px solid transparent;
    transition: all 0.15s;
    cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover { background: #5c99f5; border-color: #5c99f5; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border-2); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* terminal block */
.terminal {
    background: #05050a;
    border: 1px solid var(--blue-deep);
    box-shadow: 0 0 0 1px rgba(77, 139, 240, 0.08), inset 0 0 24px rgba(77, 139, 240, 0.04);
    margin: 32px 0;
}
.terminal-bar {
    background: linear-gradient(to bottom, #1a1d2a, #12141c);
    border-bottom: 1px solid var(--blue-deep);
    padding: 8px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.terminal-dot {
    width: 9px; height: 9px;
    background: var(--cyan);
    box-shadow: 0 0 6px var(--cyan);
    border-radius: 1px;
}
.terminal-label {
    font-size: 11px;
    color: var(--ink-dim);
    letter-spacing: 0.05em;
}

pre.demo {
    padding: 22px 26px;
    color: var(--cyan);
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.75;
    overflow-x: auto;
    white-space: pre;
    background: transparent;
}

.c-dim { color: var(--ink-faint); }
.c-ok { color: var(--ok); font-weight: 500; }
.c-accent { color: var(--blue); font-weight: 500; }
.c-key { color: #c58af0; }
.c-str { color: #f0c674; }
.c-num { color: #f0a58a; }

.cursor {
    display: inline-block;
    background: var(--cyan);
    color: #05050a;
    width: 9px;
    animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* sections */
.demo-section, .features, .essay, .install { padding: 64px 0; border-top: 1px solid var(--border); }

.section-eyebrow {
    color: var(--ink-dim);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: lowercase;
    margin-bottom: 14px;
}
.section-title {
    font-family: 'Space Grotesk', 'JetBrains Mono', sans-serif;
    font-weight: 500;
    font-size: clamp(26px, 3.4vw, 36px);
    color: #eef3ff;
    letter-spacing: -0.015em;
    margin-bottom: 36px;
    line-height: 1.2;
}

/* features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0;
    border: 1px solid var(--border);
}
.feature {
    padding: 26px 24px;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-2);
    position: relative;
    transition: background 0.15s;
}
.feature:hover { background: var(--bg-3); }
.feature:hover .feature-tag { color: var(--cyan); }

.feature-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--blue);
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    padding: 2px 7px;
    display: inline-block;
    border: 1px solid var(--blue-deep);
    background: rgba(77, 139, 240, 0.06);
    transition: color 0.15s;
}
.feature h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 10px;
    letter-spacing: -0.005em;
}
.feature p {
    color: var(--ink-dim);
    font-size: 13.5px;
    line-height: 1.7;
}
.feature p code { font-size: 0.9em; }

/* cleanup edge borders on grid */
@media (min-width: 900px) {
    .feature:nth-child(3n) { border-right: none; }
    .feature:nth-last-child(-n+3):nth-child(3n+1),
    .feature:nth-last-child(-n+3):nth-child(3n+1) ~ .feature { border-bottom: none; }
}

/* essay */
.essay { max-width: 760px; margin: 0 auto; }
.essay-rule {
    width: 44px; height: 1px;
    background: var(--blue);
}
.essay-body p {
    color: var(--ink);
    font-size: 15px;
    line-height: 1.85;
    margin-bottom: 22px;
}
.essay-body p code { color: var(--cyan); background: rgba(85, 255, 255, 0.06); padding: 1px 5px; }

/* install */
.install-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.install-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    padding: 22px;
    position: relative;
}
.install-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--blue);
}
.install-card h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--blue);
    margin-bottom: 14px;
    letter-spacing: 0.03em;
}
.install-card pre {
    background: #05050a;
    border: 1px solid var(--border-2);
    padding: 12px 14px;
    margin-bottom: 12px;
    overflow-x: auto;
}
.install-card pre code {
    color: var(--cyan);
    font-size: 12.5px;
    line-height: 1.6;
}
.install-card .note {
    color: var(--ink-dim);
    font-size: 12.5px;
    line-height: 1.65;
}
.install-card .note code { color: var(--cyan); font-size: 0.95em; }

/* footer */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--ink-dim);
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
    flex-wrap: wrap;
    gap: 14px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--ink-dim); transition: color 0.15s; }
.footer-links a:hover { color: var(--cyan); }

/* mobile */
@media (max-width: 680px) {
    .page { padding: 0 18px; }
    .hero { padding: 20px 0 48px; }
    pre.demo { font-size: 11.5px; padding: 16px; }
    .feature { border-right: none !important; }
    .section-title { margin-bottom: 24px; }
    .nav { margin-bottom: 32px; }
}