:root {
    --blue: #007AFF;
    --blue-dark: #0055C4;
    --bg-dark: #0a0a1a;
    --text: #1d1d1f;
    --text-sec: #6e6e73;
    --radius: 16px;
    --max-w: 960px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: #fff;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Nav */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,0.82);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
}
nav .inner {
    max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
    height: 52px; display: flex; align-items: center; justify-content: space-between;
}
nav .logo {
    font-size: 20px; font-weight: 700; color: var(--blue);
    text-decoration: none; letter-spacing: -0.3px;
}
nav .links { display: flex; gap: 24px; list-style: none; }
nav .links a {
    font-size: 14px; font-weight: 500; color: var(--text-sec);
    text-decoration: none; transition: color 0.2s;
}
nav .links a:hover { color: var(--blue); }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff; padding: 160px 24px 100px; text-align: center;
}
.hero h1 { font-size: 56px; font-weight: 700; letter-spacing: -1.5px; margin-bottom: 16px; }
.hero .tagline { font-size: 22px; opacity: 0.9; max-width: 520px; margin: 0 auto 40px; }
.store-btn {
    display: inline-flex; align-items: center; gap: 10px;
    background: #000; color: #fff; padding: 14px 32px; border-radius: 12px;
    text-decoration: none; font-size: 18px; font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}
.store-btn:hover { transform: scale(1.04); box-shadow: 0 8px 30px rgba(0,0,0,0.25); }
.store-btn svg { width: 24px; height: 24px; fill: #fff; }

/* Features */
.features { max-width: var(--max-w); margin: 0 auto; padding: 80px 24px; }
.features h2 { text-align: center; font-size: 36px; font-weight: 700; letter-spacing: -0.8px; margin-bottom: 48px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
    background: #f5f5f7; border-radius: var(--radius); padding: 36px;
}
.card .icon { font-size: 36px; margin-bottom: 16px; display: block; }
.card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--text-sec); line-height: 1.5; }

/* Footer */
footer {
    background: var(--bg-dark); color: rgba(255,255,255,0.6);
    text-align: center; padding: 40px 24px; font-size: 14px;
}
footer a { color: rgba(255,255,255,0.8); text-decoration: none; }
footer a:hover { color: #fff; }
footer .links { margin-bottom: 16px; }
footer .links a { margin: 0 12px; }

/* Legal */
.legal {
    max-width: 720px; margin: 0 auto; padding: 100px 24px 60px;
}
.legal h1 { font-size: 36px; font-weight: 700; letter-spacing: -0.8px; margin-bottom: 8px; }
.legal .date { font-size: 14px; color: var(--text-sec); margin-bottom: 40px; }
.legal h2 { font-size: 22px; font-weight: 600; margin-top: 36px; margin-bottom: 12px; }
.legal p, .legal ul { font-size: 16px; color: #444; margin-bottom: 16px; line-height: 1.7; }
.legal ul { padding-left: 24px; }
.legal ul li { margin-bottom: 8px; }

/* Responsive */
@media (max-width: 640px) {
    .hero h1 { font-size: 36px; }
    .hero .tagline { font-size: 18px; }
    .features h2 { font-size: 28px; }
    .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .grid { grid-template-columns: 1fr; }
    nav .links { gap: 16px; }
    nav .links a { font-size: 13px; }
}