/* ============================================================
   Chaos Academy Web Store — Shared Styles
   ============================================================ */

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

:root {
  --bg:          #080810;
  --bg-card:     #11111e;
  --bg-card-h:   #191929;
  --bg-overlay:  rgba(8, 8, 16, 0.85);
  --gold:        #f0c040;
  --gold-dim:    rgba(240, 192, 64, 0.15);
  --cyan:        #00e5ff;
  --cyan-dim:    rgba(0, 229, 255, 0.12);
  --purple:      #9b6fff;
  --text:        #eeeeff;
  --text-sub:    #8888aa;
  --border:      rgba(255, 255, 255, 0.07);
  --border-h:    rgba(255, 255, 255, 0.18);
  --radius:      18px;
  --radius-sm:   10px;
  --shadow:      0 8px 32px rgba(0, 0, 0, 0.6);
  --transition:  0.2s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Layout ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(8, 8, 16, 0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.header-logo {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--gold);
  text-decoration: none;
  white-space: nowrap;
}
.header-sub {
  font-size: .78rem;
  color: var(--text-sub);
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 60px 20px 40px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,229,255,.08) 0%, transparent 70%);
}
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 900;
  color: var(--gold);
  letter-spacing: .06em;
  text-shadow: 0 0 24px rgba(240,192,64,.4);
  margin-bottom: 10px;
}
.hero p {
  font-size: 1rem;
  color: var(--text-sub);
  max-width: 540px;
  margin: 0 auto;
}

/* ── Category Label ── */
.category-label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-sub);
  padding: 36px 0 12px;
}

/* ── Product Grid ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
  padding-bottom: 20px;
}

/* ── Product Card ── */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--cyan-dim) 0%, transparent 65%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.product-card:hover {
  border-color: var(--border-h);
  background: var(--bg-card-h);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.product-card:hover::before { opacity: 1; }
.product-card.title-card::before {
  background: radial-gradient(ellipse at 50% 0%, var(--gold-dim) 0%, transparent 65%);
}

.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .08em;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--gold);
  color: #111;
}
.card-badge.limited { background: var(--purple); color: #fff; }
.card-badge.super   { background: #ff4d6d; color: #fff; }
.card-badge.popular { background: #00e5ff; color: #111; }

.card-icon {
  font-size: 2.4rem;
  line-height: 1;
}

.card-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
}

.card-desc {
  font-size: .82rem;
  color: var(--text-sub);
  flex: 1;
}

.card-price {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: .02em;
}
.card-price small {
  font-size: .75rem;
  font-weight: 400;
  color: var(--text-sub);
  margin-left: 4px;
}

.btn-buy {
  margin-top: 4px;
  width: 100%;
  padding: 12px 0;
  border-radius: var(--radius-sm);
  border: none;
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: .05em;
  cursor: pointer;
  background: linear-gradient(135deg, #00c8e8, #0090ff);
  color: #fff;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(0, 144, 255, 0.35);
}
.btn-buy:hover  { opacity: .88; transform: scale(1.02); box-shadow: 0 6px 20px rgba(0,144,255,.5); }
.btn-buy:active { transform: scale(.98); }
.btn-buy:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.title-card .btn-buy {
  background: linear-gradient(135deg, #f0c040, #e07020);
  box-shadow: 0 4px 16px rgba(240,192,64,.35);
}

/* ── Loading Overlay ── */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 20px;
}
.loading-overlay.active { display: flex; }
.spinner {
  width: 52px;
  height: 52px;
  border: 4px solid rgba(0,229,255,.2);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { color: var(--text-sub); font-size: .9rem; }

/* ── Toast ── */
.toast {
  display: none;
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e1e32;
  border: 1px solid var(--border-h);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: .88rem;
  color: var(--text);
  z-index: 1000;
  white-space: nowrap;
  animation: slideUp .25s ease;
}
.toast.error { border-color: #ff4d6d; color: #ff8fa3; }
.toast.show   { display: block; }
@keyframes slideUp { from { opacity:0; transform:translateX(-50%) translateY(12px); } to { opacity:1; transform:translateX(-50%) translateY(0); } }

/* ── Code Box (success page) ── */
.code-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
  max-width: 520px;
  margin: 40px auto;
  box-shadow: var(--shadow);
}
.code-card h2 {
  font-size: 1.15rem;
  color: var(--text-sub);
  font-weight: 400;
  margin-bottom: 24px;
}
.gift-code-display {
  font-family: 'Courier New', monospace;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: .18em;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0,229,255,.25);
  border-radius: var(--radius-sm);
  padding: 18px 28px;
  margin-bottom: 20px;
  text-shadow: 0 0 16px rgba(0,229,255,.5);
  word-break: break-all;
}
.btn-copy {
  padding: 11px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-h);
  background: transparent;
  color: var(--text);
  font-size: .9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.btn-copy:hover   { background: var(--cyan-dim); border-color: var(--cyan); }
.btn-copy.copied  { color: var(--cyan); border-color: var(--cyan); }

/* ── Steps ── */
.steps {
  max-width: 480px;
  margin: 0 auto 40px;
}
.steps h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-sub);
  letter-spacing: .08em;
  text-align: center;
  margin-bottom: 16px;
}
.step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gold-dim);
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: .8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-text { font-size: .88rem; line-height: 1.6; color: var(--text-sub); }
.step-text strong { color: var(--text); }

/* ── Notice Banner ── */
.notice {
  background: rgba(255,210,0,.07);
  border: 1px solid rgba(255,210,0,.18);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: .8rem;
  color: #c8b040;
  line-height: 1.6;
  max-width: 520px;
  margin: 0 auto 24px;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 60px;
  text-align: center;
  font-size: .75rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.site-footer a { color: var(--text-sub); text-decoration: underline; }

/* ── Back Link ── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-sub);
  font-size: .85rem;
  text-decoration: none;
  padding: 24px 0 0;
  transition: color var(--transition);
}
.back-link:hover { color: var(--cyan); }

/* ── Responsive ── */
@media (max-width: 600px) {
  .hero { padding: 40px 16px 28px; }
  .product-grid { grid-template-columns: 1fr; }
  .code-card { padding: 24px 18px; }
  .gift-code-display { font-size: 1.4rem; letter-spacing: .1em; padding: 14px 14px; }
}