:root {
  --bg: #080810;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-hover: rgba(255, 255, 255, 0.16);
  --accent-purple: #818cf8;
  --accent-blue: #38bdf8;
  --text: #e2e2f0;
  --text-muted: #6b7280;
  --text-subtle: #374151;
  --radius: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans",
    "Noto Sans JP", "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Ambient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 15% 15%, rgba(129, 140, 248, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 85% 85%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(129, 140, 248, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ───────────────────────────────── */

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ── Header ───────────────────────────────── */

header {
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.3px;
}

.header-nav {
  display: flex;
  gap: 20px;
  align-items: center;
}

.header-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: var(--text);
}

/* ── Hero ─────────────────────────────────── */

.hero {
  padding: 72px 0 64px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(129, 140, 248, 0.12);
  border: 1px solid rgba(129, 140, 248, 0.25);
  color: var(--accent-purple);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-purple);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.75); }
}

.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 440px;
  margin: 0 auto 44px;
  line-height: 1.75;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Section ──────────────────────────────── */

.section {
  padding: 20px 0 80px;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ── Apps Grid ────────────────────────────── */

.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 620px) {
  .apps-grid {
    grid-template-columns: 1fr;
  }
}

/* ── App Card ─────────────────────────────── */

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.app-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.app-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.app-icon {
  width: 60px;
  height: 60px;
  border-radius: 13px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  line-height: 1;
  object-fit: cover;
}

/* Fallback for text-based icon (畳チャレンジ) */
.icon-tatami {
  background: linear-gradient(145deg, #0d2010 0%, #1a3d1a 100%);
  border: 1px solid rgba(134, 239, 172, 0.2);
  box-shadow: 0 0 20px rgba(134, 239, 172, 0.06);
  color: var(--text-muted);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.app-meta {
  flex: 1;
  min-width: 0;
}

.app-category {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.app-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.app-description {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.75;
}

.app-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 4px;
}

/* App Store button */
.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--text);
  color: #080810;
  font-size: 12.5px;
  font-weight: 700;
  padding: 8px 15px;
  border-radius: 100px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
  letter-spacing: 0.01em;
}

.btn-store:hover {
  opacity: 0.88;
  transform: scale(1.02);
}

.btn-store svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.link-minor {
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}

.link-minor:hover {
  color: var(--text);
}

.link-sep {
  color: var(--text-subtle);
  font-size: 12px;
}

/* ── Footer ───────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

footer p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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