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

:root {
    --bg: #0a0e17;
    --fg: #e0e0e0;
    --muted: #888;
    --accent: #00d4ff;
    --accent2: #7b2ff7;
    --card: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.08);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    line-height: 1.7;
    min-height: 100vh;
}

.grid-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 10;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 18px;
    padding-bottom: 18px;
}
.logo {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.logo span { opacity: 0.7; margin-left: 4px; }
.site-nav { display: flex; gap: 24px; }
.site-nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}
.site-nav a:hover { color: var(--accent); }

/* Hero */
.hero {
    padding: 96px 0 72px;
    text-align: center;
}
.eyebrow {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--accent);
    padding: 6px 14px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 999px;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    line-height: 1.3;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero .lead {
    color: #bbb;
    font-size: 1.05rem;
    margin-bottom: 36px;
}
.cta-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.25);
}
.btn-ghost {
    border: 1px solid var(--border);
    color: var(--fg);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* App download buttons */
.app-downloads {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 28px;
}
.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 180px;
    padding: 10px 18px;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    color: #fff;
    text-decoration: none;
    cursor: default;
}
.store-icon {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    color: #fff;
}
.store-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
    text-align: left;
}
.store-sub {
    font-size: 10px;
    letter-spacing: 0.5px;
    color: #d0d0d0;
    text-transform: uppercase;
}
.store-main {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
}

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: rgba(255, 255, 255, 0.015); }
.section h2 {
    font-size: 1.6rem;
    margin-bottom: 40px;
    text-align: center;
    color: var(--fg);
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-icon { font-size: 32px; margin-bottom: 14px; }
.card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--accent); }
.card p { font-size: 14px; color: #bbb; }

/* Steps */
.steps {
    list-style: none;
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.steps li {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 24px;
}
.step-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.step-body { color: #bbb; font-size: 14px; }
.step-body strong { color: var(--fg); font-size: 15px; }

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; }
.faq dt {
    font-weight: 600;
    color: var(--accent);
    margin-top: 22px;
    margin-bottom: 6px;
}
.faq dt:first-child { margin-top: 0; }
.faq dd { color: #bbb; font-size: 14px; margin-left: 18px; }

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
}
.footer-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.footer-nav a {
    font-size: 13px;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}
.footer-nav a:hover { color: var(--accent); }
.copy { font-size: 12px; color: #555; }

@media (max-width: 600px) {
    .site-nav { gap: 14px; font-size: 13px; }
    .hero { padding: 64px 0 48px; }
    .section { padding: 56px 0; }
    .store-btn { min-width: 160px; padding: 9px 14px; }
    .store-main { font-size: 14px; }
}