/* Simulasi Tagihan PDAM — stylesheet murni, tanpa framework */
:root {
  --primary: #0b6bcb;
  --primary-dark: #084e96;
  --bg: #eef3f8;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #dbe4ef;
  --danger: #dc2626;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

/* Header */
.topbar {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 18px 0;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
  border-radius: 50%;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.18));
}
.brand h1 { margin: 0; font-size: 1.1rem; }
.brand p { margin: 0; opacity: .85; font-size: .88rem; }
.btn-back {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: .95rem;
  border: 1.5px solid rgba(255,255,255,.8);
  border-radius: 9px;
  padding: 8px 22px;
  white-space: nowrap;
  transition: background .2s, color .2s;
}
.btn-back:hover { background: #fff; color: var(--primary-dark); }

/* Hero */
.hero { text-align: center; padding: 28px 0 6px; }
.hero h2 {
  margin: 0;
  letter-spacing: 2px;
  color: var(--primary-dark);
}
.hero h2::after {
  content: "";
  display: block;
  width: 64px; height: 4px;
  background: var(--primary);
  border-radius: 4px;
  margin: 10px auto 0;
}
.hero p { color: var(--muted); }

/* Layout */
.grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 20px;
  margin: 20px 0 30px;
}
@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 8px 24px rgba(8, 78, 150, .07);
}
.card h3 {
  margin-top: 0;
  font-size: 1.02rem;
  border-left: 5px solid var(--primary);
  padding-left: 10px;
}

/* Form */
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.field input,
.field select {
  width: 100%;
  padding: 11px 12px;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  font-size: 1rem;
  background: #fbfdff;
}
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11,107,203,.15);
}
.hint { color: var(--muted); font-size: .82rem; }

.actions { display: flex; gap: 10px; margin-top: 8px; }
.btn-primary {
  flex: 1;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 9px;
  padding: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  padding: 12px 18px;
  cursor: pointer;
  color: var(--muted);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 9px;
  font-weight: 600;
}

/* Tarif info */
.tarif-info { margin-top: 16px; }
.tarif-info summary { cursor: pointer; font-weight: 600; color: var(--primary-dark); }

/* Tables */
.table-wrap { overflow-x: auto; margin-top: 10px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { border: 1px solid var(--border); padding: 9px 10px; text-align: left; }
thead th { background: #f1f6fc; color: var(--primary-dark); }
tfoot .total-row td { background: #e8f2fd; font-weight: 800; }
.terbilang { font-style: italic; text-transform: capitalize; }

/* Tabel tarif brosur SK 347/2023 (kolom angka rata tengah, band biru muda) */
.tarif-table { min-width: 620px; }
.tarif-table thead th { background: var(--primary); color: #fff; text-align: center; vertical-align: middle; }
.tarif-table thead tr:last-child th { background: #dbeafe; color: var(--primary-dark); }
.tarif-table .band td { background: #e8f2fd; font-weight: 800; color: var(--primary-dark); }
.tarif-table .subhead th { background: #f1f6fc; color: var(--primary-dark); text-align: center; }
.tarif-table td.num, .tarif-table td.beban { text-align: center; white-space: nowrap; }
.tarif-table td.beban { font-weight: 700; vertical-align: middle; }

/* Result */
.empty {
  border: 2px dashed var(--border);
  border-radius: 12px;
  text-align: center;
  color: var(--muted);
  padding: 28px 16px;
}
.empty-icon { font-size: 2.2rem; }

.summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
.summary > div {
  background: #f6faff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}
.summary span { display: block; font-size: .78rem; color: var(--muted); }
.summary strong { font-size: 1.05rem; }
.total-box { grid-column: 1 / -1; background: #e8f2fd !important; }
.total-box strong { color: var(--primary-dark); font-size: 1.25rem; }

/* Tombol Bayar */
.pay-wrap {
  margin-top: 14px;
}
.btn-bayar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  background: linear-gradient(135deg, #16a34a, #15803d);
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.28);
  transition: all 0.2s ease;
  box-sizing: border-box;
}
.btn-bayar:hover {
  background: linear-gradient(135deg, #15803d, #166534);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(22, 163, 74, 0.38);
  color: #ffffff;
}
.btn-bayar:active {
  transform: translateY(0);
}

.notes {
  margin-top: 16px;
  font-size: .85rem;
  color: var(--muted);
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.notes ul { margin: 6px 0 10px 18px; padding: 0; }

.footer {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0 34px;
  color: var(--muted);
  font-size: .88rem;
}