@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700;900&family=Inter:wght@400;500&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: #F0F4FF;
    color: #1E293B;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ── Background canvas ─────────────────────────────────────────── */

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

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

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 40px;
    background-color: rgba(240, 244, 255, 0.88);
    backdrop-filter: blur(12px);
    z-index: 100;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    text-decoration: none;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.logo span:first-child {
    color: #1E293B;
}

.logo span:last-child {
    color: #1B4FD8;
}

.nav-link {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.9rem;
    background-color: #1B4FD8;
    color: #ffffff;
    padding: 10px 22px;
    border-radius: 6px;
    transition: background-color 0.25s ease;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
    background-color: #1440B0;
}

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

main {
    z-index: 10;
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 14vh 24px 6vh;
}

.hero {
    text-align: center;
    margin-bottom: 64px;
}

.hero h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin: 0 0 24px;
    color: #1E293B;
    letter-spacing: -1px;
}

.hero p {
    color: #475569;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
    font-size: 1.05rem;
}

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

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.card {
    background-color: #ffffff;
    padding: 32px 36px;
    border-radius: 10px;
    border-left: 3px solid #1B4FD8;
    box-shadow: 0 2px 12px rgba(27, 79, 216, 0.07);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(27, 79, 216, 0.13);
}

.card label {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: #1B4FD8;
    display: block;
    margin-bottom: 10px;
}

.card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: #1E293B;
    margin: 0 0 10px;
}

.card p {
    color: #475569;
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}

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

.cta {
    text-align: center;
    margin-top: 64px;
    padding-bottom: 40px;
}

.signal-status {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #94A3B8;
    margin-bottom: 16px;
}

.signal-cta {
    display: inline-block;
    background-color: #1B4FD8;
    color: #ffffff;
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: background-color 0.25s ease;
}

.signal-cta:hover,
.signal-cta:focus {
    background-color: #1440B0;
}

.signal-sub {
    margin-top: 14px;
    color: #94A3B8;
    font-size: 0.9rem;
}

/* ── Responsive ─────────────────────────────────────────────────── */

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

@media (max-width: 480px) {
    nav { padding: 14px 20px; }
    main { padding-top: 12vh; }
    .hero { margin-bottom: 40px; }
    .hero h1 { letter-spacing: -0.5px; }
    .hero p { font-size: 0.95rem; }
    .card { padding: 24px; }
    .cta { margin-top: 40px; }
    .signal-cta { padding: 13px 20px; font-size: 0.85rem; }
}