/* ── Reset & Base ─────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --navy:       #0A1628;
    --midnight:   #0D2137;
    --accent:     #00B4D8;
    --accent-dim: #00B4D840;
    --surface:    #F5F7FA;
    --text:       #E8ECF1;
    --text-muted: #8899AA;
    --radius:     12px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background: var(--navy);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ── Hero ────────────────────────────────────── */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 24px 60px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
    pointer-events: none;
}

.app-icon {
    border-radius: 26px;
    box-shadow: 0 20px 60px rgba(0, 180, 216, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.06);
    margin-bottom: 32px;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff 30%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.subtitle {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    color: var(--text-muted);
    max-width: 440px;
    margin: 0 auto 36px;
}

.download-badge {
    display: inline-block;
    transition: transform 0.2s ease, opacity 0.2s ease;
}
.download-badge:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

/* ── Screenshots Slider ──────────────────────── */
.screenshots {
    padding: 0 24px 60px;
    max-width: 960px;
    margin: 0 auto;
}

.slider {
    position: relative;
    overflow: hidden;
}

.slider-track {
    display: flex;
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

/* Shared device frame */
.device-frame {
    position: relative;
}

/* Phone frame */
.phone-frame {
    background: #1a1a1a;
    border-radius: 44px;
    padding: 14px;
    box-shadow:
        0 24px 80px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.phone-frame img {
    display: block;
    width: 260px;
    border-radius: 32px;
}

.phone-notch {
    width: 100px;
    height: 28px;
    background: #1a1a1a;
    border-radius: 0 0 16px 16px;
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

/* Watch frame */
.watch-frame {
    background: #2a2a2a;
    border-radius: 62px;
    padding: 14px;
    box-shadow:
        0 16px 60px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.watch-frame img {
    display: block;
    width: 180px;
    border-radius: 50px;
}

.watch-crown {
    position: absolute;
    right: -7px;
    top: 36%;
    width: 7px;
    height: 32px;
    background: #3a3a3a;
    border-radius: 0 4px 4px 0;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

/* Slider controls */
.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 24px;
}

.slider-btn {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.slider-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent-dim);
}

.slider-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    padding: 0;
    transition: background 0.2s ease, transform 0.2s ease;
}
.dot.active {
    background: var(--accent);
    transform: scale(1.3);
}
.dot:hover {
    background: rgba(255, 255, 255, 0.4);
}

@media (max-width: 600px) {
    .phone-frame img { width: 220px; }
    .phone-frame { border-radius: 36px; padding: 12px; }
    .phone-notch { width: 84px; height: 24px; top: 12px; border-radius: 0 0 14px 14px; }
    .watch-frame img { width: 140px; }
    .watch-frame { border-radius: 52px; padding: 12px; }
    .watch-crown { height: 26px; }
    .slider-btn { width: 36px; height: 36px; font-size: 1.1rem; }
}

/* ── Features ────────────────────────────────── */
.features {
    padding: 80px 24px;
    max-width: 960px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.feature {
    background: linear-gradient(145deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.feature:hover {
    transform: translateY(-4px);
    border-color: var(--accent-dim);
}

.feature-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
    margin-bottom: 16px;
}
.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── Callout ─────────────────────────────────── */
.callout {
    padding: 80px 24px;
}

.callout-inner {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    background: linear-gradient(145deg, var(--midnight), rgba(13, 33, 55, 0.5));
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 20px;
    padding: 48px 32px;
}

.callout h2 {
    font-size: clamp(1.6rem, 4vw, 2rem);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.callout p {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 480px;
    margin: 0 auto 24px;
    line-height: 1.6;
}

.stations-note {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid rgba(0, 180, 216, 0.2);
    border-radius: 100px;
    padding: 6px 16px;
}

/* ── Footer ──────────────────────────────────── */
footer {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 40px 24px;
}

.footer-content {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
}

.footer-icon {
    border-radius: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s ease;
}
.footer-links a:hover {
    color: var(--accent);
}

.copyright {
    width: 100%;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 600px) {
    .hero { padding: 60px 20px 40px; }
    .features { padding: 48px 20px; }
    .callout { padding: 48px 20px; }
    .callout-inner { padding: 32px 20px; }
    .features-grid { grid-template-columns: 1fr; gap: 20px; }
    .footer-content { justify-content: center; text-align: center; }
    .footer-brand { width: 100%; justify-content: center; }
    .footer-links { width: 100%; justify-content: center; }
}