:root {
  --bg: #f5f7fa;
  --card: #fff;
  --text: #1a1a2e;
  --muted: #667;
  --accent: #1565c0;
  --accent-light: #42a5f5;
  --border: #dde3ea;
  --success: #2e7d32;
  --warn: #f57c00;
  --danger: #c62828;
  --voice: #0d47a1;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 1rem; }
.site-header {
  background: linear-gradient(135deg, #0d47a1, #1565c0);
  color: #fff;
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .logo { color: #fff; }
.nav-main > a:not(.btn) { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 0.9rem; }
.nav-main > a:not(.btn):hover { color: #fff; }
.header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }
.logo { font-weight: 700; text-decoration: none; }
.nav-main { display: flex; flex-wrap: wrap; gap: 0.5rem 0.75rem; align-items: center; }
.nav-link-recharge { color: #ffe082 !important; font-weight: 700; }
.site-main { padding: 1.25rem 0 3rem; min-height: 60vh; }
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0; font-size: 0.875rem; color: var(--muted); }
.footer-note { margin-top: 0.5rem; }

.hero h1 { font-size: 1.75rem; margin-bottom: 0.5rem; color: var(--accent); }
.lead { color: var(--muted); max-width: 36em; }
.hero-actions { margin-top: 1.25rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-top: 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.card-paid { border-color: #ffb300; background: linear-gradient(180deg, #fffef5, #fff); }
.card-recharge { border-color: var(--accent); }
.feature-list { margin: 0; padding-left: 1.2rem; }
.feature-list li { margin: 0.35rem 0; }

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.2;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-danger { background: #ffebee; border-color: #ef9a9a; color: var(--danger); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.85rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1.05rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-recharge-lg { background: linear-gradient(180deg, #ffe082, #ffb300); color: #1a1200; border: none; font-weight: 700; }

.form label { display: block; margin-bottom: 0.85rem; }
.form input[type="text"], .form input[type="email"], .form input[type="password"],
.form input[type="number"], .form input[type="tel"], .form input[type="date"],
.form input[type="month"], .form select, .form textarea {
  width: 100%; max-width: 400px; padding: 0.55rem; margin-top: 0.25rem;
  border-radius: 8px; border: 1px solid var(--border); background: #fff; font-size: 1rem;
}
.form-inline { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: flex-end; }
.form-inline label { flex: 1 1 140px; margin-bottom: 0; }
.checkbox { display: flex; align-items: flex-start; gap: 0.5rem; }
.input-row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.input-row input { flex: 1; min-width: 0; }

.alert { padding: 0.75rem 1rem; border-radius: 8px; margin: 0.75rem 0; }
.alert-error { background: #ffebee; color: var(--danger); }
.alert-warn { background: #fff3e0; color: #e65100; }
.alert-ok { background: #e8f5e9; color: var(--success); }
.hint, .muted { color: var(--muted); font-size: 0.9rem; }
.box-muted { background: #f0f4f8; padding: 0.75rem 1rem; border-radius: 8px; margin: 0.75rem 0; }
.hidden { display: none !important; }

/* Ledger page */
.ledger-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.today-total { text-align: left; }
.today-label { display: block; font-size: 0.85rem; color: var(--muted); }
.today-amount { font-size: 2rem; font-weight: 800; color: var(--accent); }
.badge { font-size: 0.75rem; padding: 0.25rem 0.6rem; border-radius: 999px; }
.badge-free { background: #eceff1; color: var(--muted); }
.badge-paid { background: #e3f2fd; color: var(--accent); }

.section-title { margin: 0 0 0.75rem; font-size: 1.1rem; }
.voice-panel { text-align: center; }
.voice-controls { margin: 1rem 0; }
.btn-voice {
  width: 120px; height: 120px; border-radius: 50%;
  border: none; background: linear-gradient(145deg, var(--accent-light), var(--voice));
  color: #fff; font-size: 0.95rem; cursor: pointer;
  box-shadow: 0 4px 20px rgba(13,71,161,0.35);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  margin: 0 auto; touch-action: manipulation; user-select: none;
}
.btn-voice:active, .btn-voice.listening { transform: scale(0.96); box-shadow: 0 2px 10px rgba(13,71,161,0.5); background: #0d47a1; }
.voice-icon { font-size: 2rem; line-height: 1; }
.voice-transcript { min-height: 1.5rem; font-style: italic; }

.confirm-panel { text-align: left; margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--border); }
.confirm-items { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0; }
.confirm-chip {
  padding: 0.5rem 0.85rem; border-radius: 999px; border: 2px solid var(--accent);
  background: #e3f2fd; cursor: pointer; font-size: 0.95rem;
}
.confirm-chip.selected { background: var(--accent); color: #fff; }
.qty-row { margin: 1rem 0; }
.qty-controls { display: flex; align-items: center; gap: 0.5rem; }
.qty-btn { width: 44px; height: 44px; font-size: 1.25rem; padding: 0; }
#confirm-qty { width: 80px; text-align: center; max-width: none; }
.confirm-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.quick-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 0.5rem; }
.quick-btn {
  padding: 0.75rem 0.5rem; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; cursor: pointer; font-size: 0.9rem; text-align: center;
  min-height: 64px; touch-action: manipulation;
}
.quick-btn:active { background: #e3f2fd; border-color: var(--accent); }
.quick-btn small { display: block; color: var(--muted); font-size: 0.75rem; margin-top: 0.2rem; }

.ledger-list { list-style: none; margin: 0; padding: 0; }
.ledger-list li {
  display: grid; grid-template-columns: 1fr auto auto; gap: 0.5rem;
  padding: 0.6rem 0; border-bottom: 1px solid var(--border); align-items: center;
}
.ledger-amount { font-weight: 700; color: var(--accent); }
.ledger-time { color: var(--muted); font-size: 0.85rem; }

.pwa-install-bar {
  display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1rem; background: #e3f2fd; border-radius: 10px; margin-bottom: 1rem;
}

.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 0.5rem; border-bottom: 1px solid var(--border); text-align: left; }
.data-table th { color: var(--muted); font-weight: 600; }

.report-total { font-size: 2rem; font-weight: 800; color: var(--accent); margin: 0.25rem 0; }
.bar-chart { display: flex; align-items: flex-end; gap: 4px; height: 120px; padding-top: 1rem; overflow-x: auto; }
.bar-item { display: flex; flex-direction: column; align-items: center; min-width: 24px; }
.bar-fill { width: 20px; background: var(--accent-light); border-radius: 4px 4px 0 0; min-height: 4px; }
.bar-label { font-size: 0.65rem; color: var(--muted); margin-top: 4px; }

.purchase-details li, .purchase-materials li { margin: 0.4rem 0; }
.plan-option { display: block; padding: 0.75rem; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 0.5rem; cursor: pointer; }
.plan-option:has(input:checked) { border-color: var(--accent); background: #e3f2fd; }

.product-head { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 0.5rem; }
.spec-list { list-style: none; padding: 0; margin: 0.5rem 0; }
.spec-list li { padding: 0.35rem 0; border-bottom: 1px dotted var(--border); display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }

@media (max-width: 600px) {
  .nav-main { font-size: 0.8rem; gap: 0.35rem 0.5rem; }
  .today-amount { font-size: 1.6rem; }
  .quick-grid { grid-template-columns: repeat(3, 1fr); }
}