:root {
  --accent: #0ea5a4; /* teal */
  --accent-2: #7c3aed; /* violet */
  --alert: #ef4444;
  --bg: #fbfbff;
  --panel: #ffffff;
  --text: #102a43;
  --muted: #52606d;
  --edge: #e6eef6;
  --soft-shadow: 0 6px 18px rgba(16, 42, 67, 0.06);
}

[data-theme="vivid"] {
  --bg: linear-gradient(180deg,#fef3c7 0%, #fff7ed 100%);
  --panel: rgba(255,255,255,0.9);
  --text: #0f172a;
}

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

body {
  font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 0.75rem;
}

.site-wrap {
  max-width: 920px;
  margin: 1.5rem auto;
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
  padding: 0 1rem;
}

.header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.25rem;
}

.header-title {
  font-weight: 700;
  color: var(--accent-2);
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

.theme-switch {
  border: 0;
  padding: 0.4rem 0.75rem;
  background: var(--panel);
  border-radius: 8px;
  cursor: pointer;
}

.theme-switch.active { background: linear-gradient(90deg,var(--accent),var(--accent-2)); color: white }

.hero {
  background: var(--panel);
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: var(--soft-shadow);
  text-align: left;
}

.hero-icon { font-size: 2.25rem; color: var(--accent); margin-bottom: 0.5rem }
.hero-title { font-size: 1.25rem; margin-bottom: 0.25rem }
.hero-sub { color: var(--muted); margin-bottom: 0.5rem }
.contact a { color: var(--accent-2); font-weight: 600 }

.plan-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.plan-card {
  background: var(--panel);
  padding: 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--edge);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.plan-card h3 { margin: 0 0 0.4rem 0 }
.plan-charge { color: var(--accent-2); font-weight: 700; margin-bottom: 0.5rem }
.plan-cta { background: linear-gradient(90deg,var(--accent),var(--accent-2)); color: white; border: 0; padding: 0.5rem; border-radius: 8px; cursor: pointer }

.redeem-panel { margin-top: 0.75rem }
.redeem-label { display:block; font-weight:600; margin-bottom:0.4rem }
.redeem-row { display:flex; gap:0.5rem }
.redeem-input { flex:1; padding:0.6rem; border-radius:8px; border:1px solid var(--edge) }
.redeem-btn { padding:0 0.9rem; border-radius:8px; border:0; background:var(--accent); color:white }
.redeem-note { margin-top:0.5rem; color:var(--alert); min-height:1.1rem }

@media (max-width: 720px) {
  .site-wrap { padding: 0 0.6rem }
  .plan-list { grid-template-columns: 1fr }
  .redeem-row { flex-direction: column }
}