@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
    --bg:       #080c10;
    --surface:  #0e1520;
    --cyan:     #06b6d4;
    --cyan-lt:  #22d3ee;
    --green:    #22c55e;
    --green-lt: #4ade80;
    --amber:    #f59e0b;
    --muted:    #64748b;
    --ink:      #e2e8f0;
    --border:   rgba(6, 182, 212, 0.14);
}

* { box-sizing: border-box; }

body, html {
    margin: 0; padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ── Canvas ─────────────────────────────────────────────────────── */

#unicode-canvas {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
}

/* ── Nav ─────────────────────────────────────────────────────────── */

nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 18px 8%;
    background: rgba(8, 12, 16, 0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
}

.logo {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.35rem; font-weight: 700;
    letter-spacing: -0.5px;
    display: flex; align-items: baseline; gap: 0;
}

.logo-unicode { color: var(--green); }
.logo-lab     { color: var(--cyan); font-weight: 400; }

.nav-link {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600; font-size: 0.78rem;
    text-decoration: none;
    color: var(--bg);
    background: var(--cyan);
    padding: 10px 22px; border-radius: 4px;
    letter-spacing: 0.4px;
    transition: background 0.2s, transform 0.2s;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--cyan-lt);
    transform: translateY(-1px);
}

@media (max-width: 650px) {
    nav { padding: 14px 5%; }
    .logo { font-size: 1.1rem; }
    .nav-link { padding: 8px 14px; font-size: 0.72rem; }
}

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

.hero {
    max-width: 1100px; margin: 0 auto;
    padding: 13vh 24px 5vh;
    text-align: center;
    position: relative; z-index: 1;
}

.hero-eyebrow {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem; font-weight: 500;
    letter-spacing: 3px; text-transform: uppercase;
    color: var(--green);
    border: 1px solid rgba(34, 197, 94, 0.25);
    padding: 6px 18px; border-radius: 3px;
    margin-bottom: 28px;
    background: rgba(34, 197, 94, 0.06);
}

.brand-h1 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(2.4rem, 9vw, 8rem);
    font-weight: 700; line-height: 1;
    margin: 0 0 28px;
    letter-spacing: -2px;
}

.brand-h1 .unicode { color: var(--green); }
.brand-h1 .lab     { color: var(--cyan); font-weight: 400; }

.hero-sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.9rem, 2vw, 1.15rem);
    font-weight: 500;
    color: var(--cyan);
    margin: 0 0 18px;
    letter-spacing: 0.5px;
}

.hero-tagline {
    max-width: 640px; margin: 0 auto 60px;
    color: var(--muted);
    font-size: 1.04rem; line-height: 1.8;
}

@media (max-width: 480px) {
    .brand-h1 { letter-spacing: -1px; }
    .hero-tagline { font-size: 0.95rem; }
}

/* ── Cards ───────────────────────────────────────────────────────── */

.grid {
    max-width: 1100px; margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
    gap: 18px;
    position: relative; z-index: 1;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 32px 26px;
    border-radius: 6px;
    text-align: left;
    box-shadow: 0 2px 16px rgba(6, 182, 212, 0.04);
    transition: transform 0.28s, box-shadow 0.28s, border-color 0.28s;
    position: relative; overflow: hidden;
}

.card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--green), var(--cyan));
    opacity: 0; transition: opacity 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 32px rgba(6, 182, 212, 0.10);
    border-color: rgba(6, 182, 212, 0.30);
}

.card:hover::before { opacity: 1; }

.card-icon {
    font-size: 1.4rem; margin-bottom: 14px; display: block;
}

.card-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem; font-weight: 600;
    letter-spacing: 2.5px; text-transform: uppercase;
    color: var(--green); margin-bottom: 14px; display: block;
}

.card h3 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.95rem; font-weight: 600;
    margin: 0 0 12px; color: var(--ink);
    line-height: 1.4;
}

.card p {
    font-size: 0.91rem; line-height: 1.72;
    color: var(--muted); margin: 0;
}

/* ── Use cases ───────────────────────────────────────────────────── */

.use-cases {
    max-width: 1100px; margin: 64px auto 0;
    padding: 0 24px;
    text-align: center;
    position: relative; z-index: 1;
}

.use-cases-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem; font-weight: 600;
    letter-spacing: 2.5px; text-transform: uppercase;
    color: var(--muted); margin-bottom: 20px;
}

.pills {
    display: flex; flex-wrap: wrap;
    gap: 8px; justify-content: center;
}

.pill {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem; font-weight: 500;
    color: var(--cyan);
    background: rgba(6, 182, 212, 0.07);
    border: 1px solid rgba(6, 182, 212, 0.2);
    padding: 6px 16px; border-radius: 3px;
}

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

.signal-line {
    padding: 88px 20px 100px;
    text-align: center;
    position: relative; z-index: 1;
}

.signal-inner { max-width: 520px; margin: 0 auto; }

.signal-status {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem; font-weight: 600;
    letter-spacing: 3px; text-transform: uppercase;
    color: var(--green); margin-bottom: 28px;
}

.signal-cta {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 700; font-size: 0.85rem;
    text-decoration: none;
    background: var(--cyan);
    color: var(--bg);
    padding: 16px 44px; border-radius: 4px;
    letter-spacing: 0.4px;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 24px rgba(6, 182, 212, 0.30);
}

.signal-cta:hover {
    background: var(--cyan-lt);
    transform: translateY(-2px);
    box-shadow: 0 8px 36px rgba(6, 182, 212, 0.42);
}

.signal-sub {
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--muted);
}