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

:root {
    --bg: #060b12;
    --bg-alt: #0b1420;
    --ink: #f2f6fb;
    --muted: #9db0c4;
    --cyan: #3fe0e0;
    --amber: #ffb347;
    --line: rgba(255, 255, 255, 0.09);
    --card-bg: rgba(255, 255, 255, 0.035);
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

html {
    overflow-x: hidden;
    background: var(--bg);
}

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

h1, h2, h3, .wordmark {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
}

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

/* ---- Layered backdrop ---- */

#bg-layer {
    position: fixed; inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(63, 224, 224, 0.14), transparent 60%),
        radial-gradient(ellipse 60% 40% at 90% 100%, rgba(255, 179, 71, 0.08), transparent 60%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

#trace-canvas {
    position: fixed; inset: 0;
    z-index: 1;
    display: block;
    width: 100%; height: 100%;
    pointer-events: none;
}

main, nav, footer {
    position: relative;
    z-index: 10;
}

/* ---- Nav ---- */

nav {
    display: flex; justify-content: space-between; align-items: center;
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 20px clamp(20px, 5vw, 64px);
    background: rgba(6, 11, 18, 0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    transition: padding 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
}

nav.nav-scrolled {
    padding: 14px clamp(20px, 5vw, 64px);
    background: rgba(6, 11, 18, 0.92);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

@media (prefers-reduced-motion: reduce) {
    nav { transition: none; }
}

.wordmark {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    color: var(--ink);
    transition: font-size 0.25s ease;
}

nav.nav-scrolled .wordmark {
    font-size: 1.1rem;
}
.wordmark-accent { color: var(--cyan); }
.wordmark-domain { color: var(--muted); font-weight: 400; }

.nav-link {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 999px;
    background: var(--cyan);
    color: #06121a;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
    border: 1px solid transparent;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, padding 0.25s ease;
}

nav.nav-scrolled .nav-link {
    padding: 8px 18px;
}
.nav-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(63, 224, 224, 0.35);
    background: #5cf0f0;
}
.nav-link:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 3px;
}

@media (max-width: 480px) {
    nav { padding: 16px 18px; }
    .wordmark { font-size: 1.1rem; }
    .nav-link { padding: 8px 16px; font-size: 0.82rem; }

    nav.nav-scrolled { padding: 12px 18px; }
    nav.nav-scrolled .wordmark { font-size: 0.98rem; }
    nav.nav-scrolled .nav-link { padding: 6px 14px; }
}

/* ---- Hero ---- */

.hero {
    padding: 18vh clamp(20px, 6vw, 64px) 10vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--cyan);
    font-weight: 600;
    margin-bottom: 22px;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 5rem);
    line-height: 1.08;
    font-weight: 700;
    margin: 0 0 26px;
    letter-spacing: -0.01em;
    color: var(--ink);
}

.hero h1 .accent {
    color: var(--cyan);
}

.hero p {
    max-width: 680px;
    margin: 0 auto;
    color: var(--muted);
    font-size: clamp(1rem, 1.6vw, 1.2rem);
    line-height: 1.65;
}

@media (max-width: 480px) {
    .hero { padding: 14vh 18px 8vh; }
}

/* ---- Cards ---- */

.cards-section {
    padding: 6vh clamp(20px, 6vw, 64px) 8vh;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 38px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: rgba(63, 224, 224, 0.35);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.card .icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: rgba(63, 224, 224, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--cyan);
}

.card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0 0 12px;
    color: var(--ink);
}

.card p {
    color: var(--muted);
    font-size: 0.96rem;
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 480px) {
    .card { padding: 28px; }
}

/* ---- Signal line / CTA ---- */

.signal-line {
    padding: 10vh clamp(20px, 6vw, 64px) 14vh;
    text-align: center;
    position: relative;
    z-index: 2;
}

.signal-inner {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.signal-status {
    font-size: 0.78rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--amber);
    font-weight: 600;
    margin: 0;
}

.signal-cta {
    display: inline-block;
    padding: 18px 44px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--cyan), #57e6c8);
    color: #06121a;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
    box-shadow: 0 10px 30px rgba(63, 224, 224, 0.25);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.signal-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(63, 224, 224, 0.4);
}
.signal-cta:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 4px;
}

.signal-sub {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0;
}

@media (max-width: 480px) {
    .signal-cta { padding: 16px 32px; font-size: 0.98rem; }
}

/* ---- Footer (served via SSI, styled here for contrast on dark bg) ---- */

footer {
    text-align: center;
    padding: 24px;
    color: var(--muted);
    font-size: 0.8rem;
    background: var(--bg-alt);
    border-top: 1px solid var(--line);
}

footer div {
    line-height: 1.6;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    #trace-canvas { display: none; }
}