:root {
    --brand-primary: #424242;
    --brand-secondary: #616161;
    --text-primary: #1a1a1a;
    --text-muted: #6b6b6b;
    --bg: #ffffff;
    --bg-soft: #f6f6f6;
    --divider: #e6e6e6;
    --max-width: 1080px;
    --radius: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
        Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--brand-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: #000;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--divider);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--brand-primary);
    font-weight: 700;
    letter-spacing: 0.2px;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--brand-primary);
    color: #fff;
}

.brand-name {
    font-size: 20px;
}

.site-nav a {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 15px;
}

.site-nav a:hover {
    color: var(--brand-primary);
}

/* ---------- Hero ---------- */
.hero {
    padding: 96px 0 120px;
    text-align: center;
    background: linear-gradient(180deg, #fafafa 0%, #ffffff 70%);
    border-bottom: 1px solid var(--divider);
}

.hero-title {
    font-size: clamp(56px, 9vw, 112px);
    line-height: 1.02;
    margin: 0 0 20px;
    color: var(--brand-primary);
    font-weight: 800;
    letter-spacing: -2px;
}

.hero-tagline {
    font-size: clamp(18px, 2.4vw, 24px);
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto 56px;
    font-weight: 400;
}

.store-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 22px;
    background: #000;
    color: #fff !important;
    border-radius: 12px;
    min-width: 200px;
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.15s ease;
    box-shadow: var(--shadow-sm);
}

.store-btn:hover {
    background: #1a1a1a;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.store-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.store-label {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.1;
}

.store-label small {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    opacity: 0.85;
    font-weight: 500;
}

.store-label strong {
    font-size: 17px;
    font-weight: 600;
    margin-top: 2px;
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--bg-soft);
    padding: 40px 0 32px;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--brand-primary);
    font-weight: 600;
    font-size: 15px;
}

.footer-brand .brand-mark {
    width: 26px;
    height: 26px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 28px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--brand-primary);
}

.footer-copy {
    margin: 8px 0 0;
    color: var(--text-muted);
    font-size: 13px;
}

@media (max-width: 480px) {
    .header-inner {
        height: 56px;
    }

    .hero {
        padding: 64px 0 88px;
    }

    .store-btn {
        min-width: 0;
        flex: 1 1 220px;
        justify-content: center;
    }
}