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

:root {
    --bg: #040D14;
    --cyan: #22D3EE;
    --blue: #3B82F6;
    --text: #E0F0F8;
    --muted: #4A6C80;
}

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

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

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

nav {
    position: sticky;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: rgba(4, 13, 20, 0.90);
    backdrop-filter: blur(8px);
    z-index: 100;
}

.logo {
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: var(--text);
    text-transform: lowercase;
}

.logo span {
    color: var(--cyan);
}

.nav-link {
    color: var(--cyan);
    background: transparent;
    border: 1px solid var(--cyan);
    padding: 8px 18px;
    border-radius: 3px;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-decoration: none;
    transition: background-color 0.3s, color 0.3s;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
    background: rgba(34, 211, 238, 0.10);
    outline: none;
}

@media (max-width: 480px) {
    nav { padding: 14px 16px; }
    .logo { font-size: 1.25rem; }
}

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

.hero {
    text-align: center;
    padding: 22vh 20px 10vh;
    position: relative;
    z-index: 10;
}

.hero h1 {
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 700;
    font-size: clamp(2.4rem, 7vw, 6rem);
    line-height: 1.1;
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

.hero p {
    max-width: 640px;
    margin: 26px auto 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.75;
}

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

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    padding: 20px;
    margin: 0 auto;
    max-width: 1200px;
    position: relative;
    z-index: 10;
}

@media (max-width: 768px) {
    .cards { grid-template-columns: 1fr; }
}

.card {
    background-color: rgba(34, 211, 238, 0.03);
    border: 1px solid rgba(34, 211, 238, 0.10);
    padding: 32px;
    border-radius: 4px;
    transition: transform 0.3s, border-color 0.3s;
}

.card:hover {
    transform: translateY(-6px);
    border-color: rgba(34, 211, 238, 0.35);
}

.card h3 {
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 8px;
    color: var(--text);
}

.card p {
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.label {
    color: var(--cyan);
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

.cta {
    text-align: center;
    padding: 40px 20px 80px;
    position: relative;
    z-index: 10;
}

.signal-status {
    margin: 0 0 16px;
    color: var(--muted);
    letter-spacing: 3px;
    text-transform: uppercase;
    font-size: 0.78rem;
    font-family: 'Chakra Petch', sans-serif;
}

.signal-cta {
    display: inline-block;
    color: var(--cyan);
    background: transparent;
    border: 1px solid var(--cyan);
    padding: 14px 36px;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: 3px;
    transition: background-color 0.3s, transform 0.2s;
}

.signal-cta:hover,
.signal-cta:focus {
    background: rgba(34, 211, 238, 0.10);
    transform: translateY(-2px);
    outline: none;
}

.signal-sub {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 0.875rem;
}