:root {
    --blue: #0099ff;
    --blue-dark: #0066cc;
    --blue-deep: #004a99;
    --blue-bg: #f0f9ff;
    --blue-border: #bfdfff;
    --white: #ffffff;
    --dark: #0d1b2a;
    --muted: #5a7080;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--white);
    color: var(--dark);
    line-height: 1.6;
}

/* ── NAV ── */
nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--blue-border);
    padding: 0 40px;
    height: 64px;
    display: flex;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-brand img {
    width: 36px;
    height: 36px;
}

.nav-brand-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: -0.3px;
}

.nav-links {
    margin-left: auto;
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    transition: color 0.15s;
}

.nav-links a:hover {
    color: var(--blue);
}

/* ── HERO ── */
.hero {
    background: linear-gradient(160deg, var(--blue-bg) 0%, #dff0ff 60%, #f8fcff 100%);
    padding: 96px 40px 112px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 153, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-logo {
    width: 110px;
    height: 110px;
    margin: 0 auto 20px;
    display: block;
    filter: drop-shadow(0 8px 28px rgba(0, 153, 255, 0.35));
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 28px;
}

.hero-badge::before {
    content: '●';
    font-size: 8px;
    opacity: 0.8;
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero h1 em {
    font-style: normal;
    color: var(--blue);
}

.hero-sub {
    font-size: 17px;
    color: var(--muted);
    max-width: 520px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.store-buttons {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--dark);
    color: #fff;
    text-decoration: none;
    padding: 13px 22px;
    border-radius: 14px;
    border: 1.5px solid transparent;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.store-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 36px rgba(0, 153, 255, 0.22);
    border-color: var(--blue);
}

.store-btn-icon {
    font-size: 26px;
    line-height: 1;
}

.store-btn-label small {
    display: block;
    font-size: 10px;
    opacity: 0.65;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.store-btn-label strong {
    display: block;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.2;
}

.hero-note {
    font-size: 13px;
    color: var(--muted);
    margin-top: 4px;
}

/* ── HOW IT WORKS ── */
.how {
    padding: 88px 40px;
    max-width: 1080px;
    margin: 0 auto;
}

.section-heading {
    text-align: center;
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 56px;
}

.how-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.how-card {
    background: var(--blue-bg);
    border: 1px solid var(--blue-border);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    transition: box-shadow 0.2s;
}

.how-card:hover {
    box-shadow: 0 8px 32px rgba(0, 153, 255, 0.12);
}

.how-step {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: white;
    font-size: 20px;
    font-weight: 700;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}

.how-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
}

.how-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}

/* ── PRIVACY ── */
.privacy {
    background: #f7fafd;
    border-top: 1px solid var(--blue-border);
    padding: 88px 40px;
}

.privacy-inner {
    max-width: 740px;
    margin: 0 auto;
}

.privacy-inner .section-heading {
    margin-bottom: 8px;
}

.privacy-date {
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 40px;
}

.privacy-intro {
    font-size: 15px;
    color: #374151;
    margin-bottom: 12px;
    line-height: 1.7;
}

.privacy-inner h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-dark);
    margin: 36px 0 10px;
    padding-left: 14px;
    border-left: 3px solid var(--blue);
}

.privacy-inner p,
.privacy-inner li {
    font-size: 14px;
    color: #374151;
    line-height: 1.75;
}

.privacy-inner ul {
    padding-left: 22px;
    margin-top: 4px;
}

.privacy-inner li {
    margin-bottom: 6px;
}

.privacy-contact {
    margin-top: 40px;
    background: linear-gradient(135deg, var(--blue-bg), #dff0ff);
    border: 1px solid var(--blue-border);
    border-radius: 16px;
    padding: 24px 28px;
}

.privacy-contact a {
    color: var(--blue);
    text-decoration: none;
    font-weight: 600;
}

/* ── FOOTER ── */
footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.55);
    text-align: center;
    padding: 44px 40px;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-brand img {
    width: 30px;
    height: 30px;
}

.footer-brand span {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

footer p {
    font-size: 13px;
    margin-top: 6px;
}

footer a {
    color: var(--blue);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ── STANDALONE PRIVACY PAGE ── */
.privacy-page {
    min-height: calc(100vh - 64px - 160px);
    border-top: none;
}

/* ── SCROLL ANIMATIONS ── */
.how-card.hidden {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.how-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.how-card:nth-child(2).hidden { transition-delay: 0.1s; }
.how-card:nth-child(3).hidden { transition-delay: 0.2s; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
    nav {
        padding: 0 20px;
    }

    .nav-links {
        gap: 20px;
    }

    .hero {
        padding: 72px 20px 88px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero-sub {
        font-size: 16px;
    }

    .how {
        padding: 64px 20px;
    }

    .section-heading {
        font-size: 26px;
    }

    .privacy {
        padding: 64px 20px;
    }

    footer {
        padding: 36px 20px;
    }
}