@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,600;0,700;1,400&family=Work+Sans:wght@400;500;600;700&display=swap');

:root {
    --sand: #f5f1e3;
    --sand-dark: #ede8d4;
    --teal: #6da395;
    --deep-teal: #4a7a6c;
    --tan: #c5a880;
    --charcoal: #3c3b3b;
    --muted: #7d7d7d;
    --white: #ffffff;
}

* { box-sizing: border-box; }

body, html {
    margin: 0; padding: 0;
    font-family: 'Work Sans', sans-serif;
    background-color: var(--sand);
    color: var(--charcoal);
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

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

.dune-nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 8%;
    background-color: rgba(245, 241, 227, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid rgba(109, 163, 149, 0.18);
}

.logo {
    font-family: 'Lora', serif;
    font-size: 1.5rem;
    color: var(--teal);
    letter-spacing: -0.3px;
}

.logo span { color: var(--tan); font-weight: 400; }

.nav-link {
    background-color: var(--teal);
    color: var(--sand);
    padding: 10px 24px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
    transition: background-color 0.25s ease;
    white-space: nowrap;
}

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

@media (max-width: 650px) {
    .dune-nav { padding: 12px 5%; }
    .logo { font-size: 1.15rem; }
    .nav-link { padding: 8px 16px; font-size: 0.85rem; }
}

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

.hero {
    max-width: 1100px; margin: 0 auto; padding: 12vh 20px 6vh;
    text-align: center; position: relative; z-index: 10;
    overflow: hidden;
}

.delta-mark {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Lora', serif;
    font-size: clamp(180px, 38vw, 440px);
    color: var(--teal);
    opacity: 0.05;
    pointer-events: none;
    user-select: none;
    line-height: 1;
    z-index: 0;
}

.eyebrow {
    font-size: 0.72rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--teal);
    font-weight: 600;
    margin: 0 0 20px;
    position: relative; z-index: 1;
}

.brand-h1 {
    font-family: 'Lora', serif;
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    font-weight: 700;
    margin: 0 0 28px;
    color: var(--charcoal);
    line-height: 1.15;
    position: relative; z-index: 1;
}

.hero-tagline {
    max-width: 620px; margin: 0 auto;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.75;
    position: relative; z-index: 1;
}

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

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
    max-width: 1100px; margin: 0 auto;
    padding: 8px 20px 64px;
    position: relative; z-index: 10;
}

.card {
    background-color: var(--white);
    padding: 34px 32px;
    border-radius: 10px;
    border-left: 3px solid var(--teal);
    text-align: left;
    box-shadow: 0 2px 10px rgba(60, 59, 59, 0.07);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(60, 59, 59, 0.13);
}

.label {
    font-size: 0.7rem;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--teal);
    font-weight: 700;
    margin-bottom: 10px;
}

.card h3 {
    font-family: 'Lora', serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 10px;
    color: var(--charcoal);
}

.card p {
    color: var(--muted);
    margin: 0;
    line-height: 1.7;
    font-size: 0.94rem;
}

@media (max-width: 600px) {
    .card { padding: 26px 22px; }
}

/* ---- Signal Line ---- */

.signal-line {
    padding: 40px 20px 130px;
    text-align: center;
    position: relative; z-index: 10;
}

.signal-inner { max-width: 500px; margin: 0 auto; }

.signal-status {
    font-size: 0.72rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--teal);
    font-weight: 700;
    margin-bottom: 22px;
}

.signal-cta {
    display: inline-block;
    background-color: var(--teal);
    color: var(--sand);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-size: 0.88rem;
    padding: 15px 42px;
    border-radius: 5px;
    transition: background-color 0.25s ease;
}

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

.signal-sub {
    margin-top: 18px;
    font-size: 0.88rem;
    color: var(--muted);
}

/* ---- Animated landscape background ---- */

.dune-waves {
    position: fixed; bottom: 0; left: 0;
    width: 200%; height: 48vh;
    z-index: 1;
    opacity: 0.65;
    pointer-events: none;
}

@media (max-width: 768px) {
    .dune-waves { height: 36vh; }
}

@media (max-width: 480px) {
    .hero { padding: 10vh 16px 4vh; }
    .hero-tagline { padding: 0 8px; }
    .brand-h1 { line-height: 1.2; }
}

@media (prefers-reduced-motion: reduce) {
    .card { transition: none; }
    .dune-waves path { animation-play-state: paused; }
}