:root {
    --abyss: #050f29;
    --deep-sea: #08335c;
    --lagoon: #1f9ec7;
    --foam: #b8f2ff;
    --good: #40e09e;
    --epic: #ffad33;
    --text: #e8f6fb;
    --muted: rgba(232, 246, 251, 0.72);
    --card: rgba(255, 255, 255, 0.06);
    --card-border: rgba(255, 255, 255, 0.12);
    --radius: 24px;
    color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--abyss);
    background-image:
        radial-gradient(1200px 600px at 80% -10%, rgba(31, 158, 199, 0.35), transparent 60%),
        radial-gradient(900px 500px at 0% 20%, rgba(8, 51, 92, 0.9), transparent 70%),
        linear-gradient(180deg, #071c3d 0%, var(--abyss) 60%);
    background-attachment: fixed;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--foam); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.stars {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        radial-gradient(1.5px 1.5px at 12% 18%, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 28% 42%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1.5px 1.5px at 66% 12%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 82% 34%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 46% 8%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1.5px 1.5px at 90% 70%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 8% 64%, rgba(255,255,255,0.4), transparent);
    opacity: 0.8;
    z-index: 0;
}

main, header, footer { position: relative; z-index: 1; }

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.brand img { width: 36px; height: 36px; border-radius: 9px; }

.top-links a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 20px;
    font-size: 0.95rem;
}

.top-links a:hover { color: var(--text); }

.hero {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
    padding-block: 40px 80px;
}

.app-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    box-shadow: 0 12px 40px rgba(31, 158, 199, 0.45);
}

.eyebrow {
    display: block;
    margin: 24px 0 10px;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--foam);
}

h1 {
    margin: 0 0 18px;
    font-size: clamp(2.6rem, 6vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: -0.02em;
    background: linear-gradient(120deg, #ffffff 0%, var(--foam) 45%, var(--lagoon) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.lede { font-size: 1.2rem; color: var(--muted); max-width: 34em; margin: 0 0 28px; }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 14px;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    font-weight: 600;
    text-decoration: none;
}

.badge small { display: block; font-size: 0.7rem; font-weight: 500; opacity: 0.75; }

.ghost-button {
    padding: 12px 20px;
    border-radius: 14px;
    border: 1px solid var(--card-border);
    background: var(--card);
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
}

.phone {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    border-radius: 44px;
    padding: 10px;
    background: linear-gradient(160deg, #1c2a44, #0a1428);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.08), 0 0 60px rgba(31, 158, 199, 0.25);
}

.phone img { display: block; width: 100%; height: auto; border-radius: 34px; }

.hero-phones {
    position: relative;
    display: flex;
    justify-content: center;
    padding: 20px 0 20px 60px;
}

.hero-phones .phone { max-width: 280px; }

.hero-phones .back {
    position: absolute;
    left: 0;
    top: 50px;
    transform: rotate(-8deg) scale(0.88);
    opacity: 0.85;
}

.hero-phones .front { position: relative; transform: rotate(3deg); }

.section { padding-block: 70px; }

.feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    padding: 50px 0;
}

.feature.reverse .feature-text { order: 2; }

.feature-text h2 {
    font-size: clamp(1.8rem, 3.6vw, 2.6rem);
    line-height: 1.15;
    margin: 6px 0 16px;
    letter-spacing: -0.01em;
}

.feature-text p { color: var(--muted); font-size: 1.08rem; }

.tag {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.tag.tide { color: var(--foam); }
.tag.surf { color: var(--good); }
.tag.moon { color: #9ec8ff; }
.tag.fish { color: var(--epic); }
.tag.boat { color: #ffc561; }

.checks { list-style: none; padding: 0; margin: 18px 0 0; }

.checks li { padding: 6px 0 6px 30px; position: relative; color: var(--text); }

.checks li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 13px;
    width: 16px;
    height: 10px;
    border-left: 2.5px solid var(--lagoon);
    border-bottom: 2.5px solid var(--lagoon);
    transform: rotate(-45deg);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 22px;
    backdrop-filter: blur(12px);
}

.card h3 { margin: 10px 0 6px; font-size: 1.1rem; }

.card p { margin: 0; color: var(--muted); font-size: 0.97rem; }

.card .icon { font-size: 1.6rem; }

.center { text-align: center; }

.section-title {
    font-size: clamp(1.8rem, 3.6vw, 2.6rem);
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.section-sub { color: var(--muted); margin: 0 auto 36px; max-width: 38em; }

details {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 16px 20px;
    margin-bottom: 12px;
}

summary { cursor: pointer; font-weight: 650; list-style: none; }

summary::-webkit-details-marker { display: none; }

summary::after { content: "+"; float: right; color: var(--foam); font-weight: 400; font-size: 1.3rem; line-height: 1; }

details[open] summary::after { content: "–"; }

details p { color: var(--muted); margin: 12px 0 0; }

.contact {
    text-align: center;
    padding: 48px 24px;
    border-radius: 32px;
    background: linear-gradient(135deg, rgba(31, 158, 199, 0.25), rgba(8, 51, 92, 0.5));
    border: 1px solid var(--card-border);
}

.wave-divider { display: block; width: 100%; height: 80px; }

footer {
    padding-block: 40px 50px;
    color: var(--muted);
    font-size: 0.88rem;
    text-align: center;
}

footer a { color: var(--muted); }

.doc {
    max-width: 780px;
    margin: 20px auto 60px;
    padding: 40px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    backdrop-filter: blur(12px);
}

.doc h1 { font-size: clamp(2rem, 5vw, 3rem); }

.doc h2 { margin-top: 34px; font-size: 1.3rem; color: var(--foam); }

.doc p, .doc li { color: var(--muted); }

.doc .summary-box {
    padding: 18px 20px;
    border-radius: 16px;
    background: rgba(64, 224, 158, 0.1);
    border: 1px solid rgba(64, 224, 158, 0.35);
    color: var(--text);
}

.phone-pair {
    display: flex;
    gap: 18px;
    justify-content: center;
}

.phone-pair .phone { max-width: 250px; }
.phone-pair .phone:last-child { margin-top: 60px; }

.showcase { text-align: center; }

.showcase .tag { display: block; margin-bottom: 8px; }

.wide-shot {
    display: block;
    width: 100%;
    max-width: 720px;
    height: auto;
    margin: 0 auto;
    border-radius: 28px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.1), 0 0 60px rgba(64, 224, 158, 0.18);
}

.mac-frame {
    max-width: 900px;
    margin: 0 auto;
    padding: 14px 14px 26px;
    border-radius: 22px;
    background: linear-gradient(160deg, #2a3650, #0d1628);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.mac-frame img { display: block; width: 100%; height: auto; border-radius: 10px; }

.all-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.all-features h3 { margin: 0 0 10px; }

.all-features ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 0.95rem; }

.all-features li { padding: 3px 0; }

@media (max-width: 820px) {
    .phone-pair .phone { max-width: 46%; }
    .phone-pair .phone:last-child { margin-top: 30px; }

    .hero, .feature { grid-template-columns: 1fr; gap: 32px; }
    .feature.reverse .feature-text { order: 0; }
    .hero { text-align: center; padding-block-start: 20px; }
    .hero .lede { margin-left: auto; margin-right: auto; }
    .cta-row { justify-content: center; }
    .phone { max-width: 280px; }
    .hero-phones { padding: 10px 0 10px 40px; }
    .hero-phones .phone { max-width: 230px; }
    .hero-phones .back { left: 4%; }
    .top-links { white-space: nowrap; }
    .top-links a { margin-left: 14px; font-size: 0.9rem; }
    .top-links a[href="#features"] { display: none; }
    .doc { padding: 26px 20px; border-radius: 22px; }
}