/* ghost-surface.ai — Deterministic Signals Registry
   The 18-Node Global Mesh
   © 2026 Allooloo Technologies Corp. */

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

:root {
    --bg: #0a0a0f;
    --bg-card: #1a1a24;
    --bg-card-2: #14141c;
    --cyan: #06b6d4;
    --cyan-dim: #0891b2;
    --amber: #fbbf24;
    --green: #22c55e;
    --purple: #a855f7;
    --azure: #0078D4;
    --red: #ef4444;
    --orange: #f97316;
    --white: #ffffff;
    --gray: #a1a1aa;
    --muted: #71717a;
    --border: #27272a;
    --border-bright: #3f3f46;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

/* LANGUAGE BAR */
.lang-bar { background: #050508; border-bottom: 1px solid var(--border); padding: 0.5rem 2rem; font-size: 0.75rem; }
.lang-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.lang-links { display: flex; gap: 1rem; }
.lang-links a { color: var(--muted); transition: color 0.2s; }
.lang-links a:hover, .lang-links a.lang-active { color: var(--white); text-decoration: none; }
.lang-social { color: var(--cyan); }
.lang-social:hover { text-decoration: none; opacity: 0.8; }

/* NAV */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10,10,15,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 2rem;
}
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.nav-brand { display: flex; align-items: center; gap: 0.75rem; }
.logo-mark { font-size: 1.5rem; color: var(--cyan); }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name { font-size: 1rem; font-weight: 600; }
.logo-sub { font-size: 0.7rem; color: var(--muted); }
.nav-links { display: flex; gap: 2rem; }
.nav-links a { font-size: 0.9rem; color: var(--gray); }
.nav-links a:hover { color: var(--white); text-decoration: none; }

/* HERO */
.hero { padding: 10rem 2rem 5rem; max-width: 1200px; margin: 0 auto; text-align: center; }
.hero-badges { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 2rem; }
.hero-badge { padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.hero-badge.cyan { background: var(--cyan); color: var(--bg); }
.hero-badge.azure { background: var(--azure); color: var(--white); }
.hero-badge.green { background: var(--green); color: var(--bg); }
.hero h1 { font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 700; line-height: 1.1; margin-bottom: 1.5rem; }
.hero h1 .highlight { color: var(--cyan); }
.hero-subtitle { font-size: 1.1rem; color: var(--gray); max-width: 740px; margin: 0 auto; }

/* SECTIONS */
.section { padding: 4rem 2rem; border-top: 1px solid var(--border); }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-label { display: block; font-size: 0.75rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.section h2 { font-size: 1.75rem; font-weight: 600; margin-bottom: 1rem; }
.section-desc { color: var(--gray); margin-bottom: 2rem; max-width: 840px; }

/* AGENT SECTION (MESH) */
.agent-section { text-align: center; background: linear-gradient(180deg, #12121a 0%, var(--bg) 100%); }
.agent-section h2 { font-size: 2.5rem; color: var(--cyan); }
.partner-list { font-size: 1.1rem; color: var(--gray); margin: 1.5rem 0; }
.agent-desc { font-size: 1rem; color: var(--gray); max-width: 800px; margin: 0 auto; }
.agent-stack { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }
.agent-stack-item { background: var(--bg-card); border: 1px solid var(--cyan); padding: 0.5rem 1rem; border-radius: 4px; font-size: 0.85rem; }

/* FIRSTS GRID */
.firsts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.first-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; transition: border-color 0.2s; }
.first-card:hover { border-color: var(--green); }
.first-card .badge { display: inline-block; background: var(--green); color: var(--bg); padding: 0.25rem 0.75rem; border-radius: 12px; font-size: 0.7rem; font-weight: 700; margin-bottom: 0.75rem; }
.first-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.first-card p { color: var(--muted); font-size: 0.9rem; }

/* REGISTRY SECTION */
.registry-section { background: linear-gradient(180deg, var(--bg) 0%, #0d0d14 100%); }
.registry-layers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}
@media (max-width: 900px) { .registry-layers { grid-template-columns: 1fr; } }
.registry-column {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}
.column-header { margin-bottom: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.column-tag {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.25rem 0.6rem;
    border-radius: 3px;
    margin-bottom: 0.75rem;
}
.column-tag.human { background: var(--amber); color: var(--bg); }
.column-tag.agentic { background: var(--cyan); color: var(--bg); }
.column-header h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.column-desc { color: var(--muted); font-size: 0.85rem; }
.registry-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
}
@media (max-width: 520px) { .registry-list { grid-template-columns: 1fr; } }
.registry-node {
    display: flex; align-items: center; gap: 0.6rem;
    background: var(--bg-card-2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--amber);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    transition: all 0.15s ease;
}
.registry-node.agentic-node { border-left-color: var(--cyan); }
.registry-node:hover {
    text-decoration: none;
    border-color: var(--amber);
    background: #1e1e2a;
    transform: translateX(2px);
}
.registry-node.agentic-node:hover { border-color: var(--cyan); }
.registry-node .cc {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--amber);
    font-size: 0.75rem;
    min-width: 1.8rem;
}
.registry-node.agentic-node .cc { color: var(--cyan); }
.registry-node .dom {
    font-family: 'JetBrains Mono', monospace;
    color: var(--gray);
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* SIGNALS GRID */
.signals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}
.signal-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
}
.signal-card::before {
    content: ""; position: absolute; top: 0; left: 0; bottom: 0; width: 4px;
    background: var(--muted);
}
.signal-card.signal-000::before { background: var(--muted); }
.signal-card.signal-200::before { background: var(--green); }
.signal-card.signal-300::before { background: var(--amber); }
.signal-card.signal-403::before { background: var(--red); }
.signal-card.signal-404::before { background: #444; }
.signal-card.signal-451::before { background: var(--orange); }
.signal-card.signal-500::before { background: var(--purple); }
.signal-code { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 1.05rem; margin-bottom: 0.35rem; }
.signal-card.signal-000 .signal-code { color: var(--muted); }
.signal-card.signal-200 .signal-code { color: var(--green); }
.signal-card.signal-300 .signal-code { color: var(--amber); }
.signal-card.signal-403 .signal-code { color: var(--red); }
.signal-card.signal-404 .signal-code { color: #999; }
.signal-card.signal-451 .signal-code { color: var(--orange); }
.signal-card.signal-500 .signal-code { color: var(--purple); }
.signal-state {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--white);
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}
.signal-desc { color: var(--muted); font-size: 0.85rem; }

/* GHOST HEADERS */
.ghost-intro { color: var(--gray); margin-bottom: 2rem; max-width: 840px; }
.ghost-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 0.5rem; }
.ghost-row {
    display: flex; justify-content: space-between; align-items: center;
    background: var(--bg-card);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    border-left: 3px solid var(--cyan);
}
.ghost-row .name { font-family: 'JetBrains Mono', monospace; color: var(--cyan); font-size: 0.8rem; }
.ghost-row .value { color: var(--muted); font-size: 0.78rem; text-align: right; max-width: 55%; word-break: break-all; font-family: 'JetBrains Mono', monospace; }

/* ARCHITECTURE */
.arch-section { background: linear-gradient(180deg, #0d0d14 0%, var(--bg) 100%); }
.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-top: 2rem;
}
.arch-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.2s;
}
.arch-card:hover { border-color: var(--azure); }
.arch-tier {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}
.arch-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.arch-card p { color: var(--muted); font-size: 0.85rem; }

/* CONTACT */
.contact-section { background: linear-gradient(180deg, var(--bg) 0%, #0d0d14 100%); }
.contact-intro { color: var(--gray); max-width: 720px; margin-bottom: 2rem; }
.contact-form {
    display: flex; flex-direction: column; gap: 1rem;
    max-width: 720px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.contact-form input, .contact-form textarea {
    background: var(--bg-card-2);
    border: 1px solid var(--border);
    color: var(--white);
    padding: 0.85rem 1rem;
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: border-color 0.15s;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--cyan);
}
.contact-form textarea { resize: vertical; }
.contact-btn {
    background: var(--cyan);
    color: var(--bg);
    border: none;
    padding: 0.95rem 1.5rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: all 0.15s;
    align-self: flex-start;
}
.contact-btn:hover { background: var(--cyan-dim); transform: translateY(-1px); }

/* FOOTER */
.footer {
    background: #050508;
    border-top: 1px solid var(--border);
    padding: 2.5rem 2rem;
}
.footer-inner { max-width: 1200px; margin: 0 auto; display: grid; gap: 1.25rem; }
.footer-brand { display: flex; align-items: center; gap: 0.75rem; }
.footer-brand .logo-mark { font-size: 1.5rem; color: var(--cyan); }
.footer-name { font-weight: 600; font-size: 1rem; }
.footer-sub { font-size: 0.75rem; color: var(--muted); }
.footer-tagline {
    font-size: 1rem;
    color: var(--cyan);
    font-weight: 500;
}
.footer-meta {
    display: flex; flex-wrap: wrap; gap: 1.5rem;
    color: var(--muted);
    font-size: 0.8rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* SMALL SCREENS */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero { padding-top: 7rem; }
    .section { padding: 3rem 1.25rem; }
}