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

:root{
    --bg: #08090d;
    --bg-2: #0d1016;
    --text: #f4f6fa;
    --muted: #a7b0c2;
    --muted-2: #8891a6;
    --border: rgba(255,255,255,0.09);
    --card-bg: rgba(255,255,255,0.035);
    --card-bg-hover: rgba(255,255,255,0.06);
    --accent: #4cc9f0;
    --accent-2: #b8f24c;
    --accent-3: #f2c14c;
}

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

html{ scroll-behavior: smooth; overflow-x: hidden; }

body{
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

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

.mono{
    font-family: 'JetBrains Mono', monospace;
}

/* ---- Background ---- */

.bg-layer{
    position: fixed;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 70% 55% at 50% -5%, rgba(76,201,240,0.14), transparent 60%),
        radial-gradient(ellipse 60% 45% at 85% 100%, rgba(184,242,76,0.06), transparent 60%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

#network{
    position: fixed;
    inset: 0;
    z-index: 1;
    display: block;
    pointer-events: none;
}

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

nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 5vw;
    background: rgba(8,9,13,0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
    transition: padding 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
}

nav.nav-scrolled {
    padding: 14px 5vw;
    background: rgba(8,9,13,0.92);
    box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

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

.wordmark{
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text);
    text-decoration: none;
    transition: font-size 0.25s ease;
}

nav.nav-scrolled .wordmark {
    font-size: 1.08rem;
}

@media (prefers-reduced-motion: reduce) {
    .wordmark { transition: none; }
}
.wordmark .wm-a{ color: var(--text); }
.wordmark .wm-b{ color: var(--accent); }
.wordmark .wm-suffix{ color: var(--muted-2); font-weight: 500; }

.nav-link{
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--text);
    padding: 10px 20px;
    border-radius: 999px;
    text-decoration: none;
    letter-spacing: 0.01em;
    transition: padding 0.25s ease, font-size 0.25s ease, transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}

nav.nav-scrolled .nav-link {
    padding: 8px 16px;
    font-size: 0.8rem;
}

@media (prefers-reduced-motion: reduce) {
    .nav-link { transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease; }
}
.nav-link:hover,
.nav-link:focus-visible{
    background: var(--accent);
    color: #06121a;
    box-shadow: 0 8px 24px rgba(76,201,240,0.28);
    transform: translateY(-1px);
}
.nav-link:focus-visible{
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

@media (max-width: 650px) {
    nav { padding: 16px 5%; }
    .wordmark { font-size: 1.05rem; }
    .nav-link { padding: 8px 16px; font-size: 0.8rem; }

    nav.nav-scrolled { padding: 12px 5%; }
    nav.nav-scrolled .wordmark { font-size: 0.92rem; }
    nav.nav-scrolled .nav-link { padding: 6px 13px; font-size: 0.72rem; }
}

/* ---- Layout ---- */

main{
    position: relative;
    z-index: 10;
}

section{
    padding: 0 6vw;
}

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

.hero{
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 12vh;
    padding-bottom: 8vh;
}

.hero .eyebrow{
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 22px;
    font-weight: 500;
}

.hero h1{
    font-size: clamp(2rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.02em;
    max-width: 900px;
}
.hero h1 .line{ display: block; }
.hero h1 .line + .line{ color: var(--muted); }

.hero-tagline,
.hero p.sub{
    margin-top: 28px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    line-height: 1.65;
    color: var(--muted);
}

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

.cards{
    padding-top: 6vh;
    padding-bottom: 10vh;
}

.grid,
.cards-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.card{
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 38px 35px;
    text-align: left;
    transition: transform 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.card:hover{
    transform: translateY(-6px);
    background: var(--card-bg-hover);
    border-color: rgba(76,201,240,0.35);
}

.card h3,
.card .card-label{
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
    font-weight: 500;
}

.card p{
    font-size: 0.98rem;
    line-height: 1.6;
    color: var(--muted);
    margin: 0;
}

@media (max-width: 600px) {
    .card { padding: 30px 24px; }
}

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

.cta{
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-top: 8vh;
    padding-bottom: 14vh;
}

.signal-status{
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent-2);
    margin-bottom: 22px;
    font-weight: 500;
}

.signal-cta{
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1rem, 1.6vw, 1.2rem);
    font-weight: 600;
    color: #06121a;
    background: linear-gradient(135deg, var(--accent), #7fdcf5);
    padding: 18px 42px;
    border-radius: 12px;
    text-decoration: none;
    letter-spacing: 0.01em;
    box-shadow: 0 12px 32px rgba(76,201,240,0.22);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: inline-block;
}
.signal-cta:hover,
.signal-cta:focus-visible{
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(76,201,240,0.34);
}
.signal-cta:focus-visible{
    outline: 2px solid var(--text);
    outline-offset: 4px;
}

.signal-sub{
    margin-top: 22px;
    font-size: 0.88rem;
    color: var(--muted-2);
}

/* ---- Responsive ---- */

@media (max-width: 480px){
    .hero{ padding-top: 14vh; }
    .hero h1{ letter-spacing: -0.01em; }

    .signal-cta{
        width: 100%;
        padding: 16px 20px;
    }
}

@media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    * { transition: none !important; }
}