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

:root {
    --teal-deep: #005F73;
    --teal-dark: #003844;
    --teal-light: #E8F5F7;
    --mint: #7FDBB6;
    --slate: #7A9E9F;
}

* {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: 'Montserrat', sans-serif;
    background-color: var(--teal-light);
    color: var(--teal-dark);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

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

nav {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(232, 245, 247, 0.8);
    backdrop-filter: blur(10px);
    z-index: 10;
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    color: var(--teal-deep);
    position: relative;
}

.logo::after {
    content: '';
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--mint);
    position: absolute;
    left: 0;
    bottom: -5px;
}

.nav-link {
    background-color: var(--mint);
    color: var(--teal-dark);
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.nav-link:hover, .nav-link:focus {
    background-color: var(--teal-deep);
    color: var(--teal-light);
}

@media (max-width: 480px) {
    nav { padding: 15px 20px; }
}

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

.hero {
    text-align: center;
    padding: 10vh 20px 0;
    z-index: 10;
    position: relative;
}

.hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 6vw, 5rem);
    margin-bottom: 20px;
}

.hero p {
    max-width: 680px;
    margin: 0 auto;
    color: var(--slate);
}

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

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    padding: 60px 40px;
    z-index: 10;
    position: relative;
}

.card {
    background-color: #FFFFFF;
    border-radius: 10px;
    padding: 35px 40px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card .label {
    font-weight: bold;
    color: var(--mint);
    margin-bottom: 10px;
}

.card h3 {
    margin-bottom: 15px;
    font-family: 'Playfair Display', serif;
    color: var(--teal-deep);
}

.card p {
    color: var(--teal-dark);
}

@media (max-width: 480px) {
    .cards { padding: 40px 20px; }
}

/* ── Signal Line / CTA ─────────────────────────────────────────── */

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

.signal-inner {
    max-width: 600px;
    margin: 0 auto;
}

.signal-status {
    margin-bottom: 20px;
    color: var(--teal-deep);
}

.signal-cta {
    background-color: var(--mint);
    color: var(--teal-dark);
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease;
    display: inline-block;
}

.signal-cta:hover, .signal-cta:focus {
    background-color: var(--teal-deep);
    color: var(--teal-light);
}

.signal-sub {
    margin-top: 20px;
    color: var(--teal-deep);
}

@media (max-width: 480px) {
    .signal-line { padding: 30px 20px; }
}

/* ── Wave background ──────────────────────────────────────────── */

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

.wave-1 { animation: wave1 10s linear infinite; }
.wave-2 { animation: wave2 15s linear infinite; }
.wave-3 { animation: wave3 20s linear infinite; }

@keyframes wave1 {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}

@keyframes wave2 {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

@keyframes wave3 {
    from { transform: translateX(0); }
    to { transform: translateX(-150%); }
}