:root {
  --ink: #102f2f;
  --muted: #4f6b6b;
  --brand: #0f6f6d;
  --brand-2: #1ea69d;
  --accent: #f3b23f;
  --card: #ffffff;
  --line: #e4eceb;
  --danger: #b42318;
  --warn: #b76e00;
  --ok: #167b4e;
  --shadow: 0 12px 30px rgba(15, 47, 47, 0.12);
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 380px at 10% -10%, rgba(30, 166, 157, 0.16), transparent 60%),
    radial-gradient(600px 320px at 90% 10%, rgba(243, 178, 63, 0.18), transparent 65%),
    linear-gradient(180deg, #f7f4ea 0%, #eef4f2 60%, #f8f5ef 100%);
  min-height: 100vh;
}

#app {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 18px 60px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-link {
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  cursor: pointer;
}

.brand-link:focus-visible {
  outline: 2px solid rgba(15, 111, 109, 0.6);
  outline-offset: 4px;
  border-radius: 12px;
}

.logo {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: white;
  font-size: 24px;
  box-shadow: var(--shadow);
}

.title {
  font-family: "Noto Serif TC", serif;
  font-weight: 600;
  font-size: 20px;
}

.subtitle { font-size: 13px; color: var(--muted); }

.btn {
  border: none;
  padding: 12px 18px;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  min-height: 52px;
}

.btn.primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: white;
  box-shadow: 0 10px 24px rgba(15, 111, 109, 0.25);
}

.btn.secondary { background: var(--accent); color: #3b2a00; }

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn.small { min-height: 40px; padding: 8px 14px; font-size: 14px; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; box-shadow: none; }

.progress { margin-bottom: 18px; }

.progress-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin-bottom: 8px;
}

.progress-steps .dot {
  padding: 6px 4px;
  border-radius: 999px;
  background: rgba(15, 111, 109, 0.12);
}

.progress-steps .dot.active {
  background: var(--brand);
  color: white;
  font-weight: 700;
}

.progress-bar {
  height: 6px;
  background: rgba(15, 111, 109, 0.12);
  border-radius: 999px;
  overflow: hidden;
}

#progressFill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transition: width 0.3s ease;
}

.step { display: none; opacity: 0; transform: translateY(10px); }
.step.active { display: block; opacity: 1; transform: translateY(0); animation: fadeUp 0.35s ease; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.card + .card { margin-top: 14px; }

.card-header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.card-title { font-weight: 700; font-size: 18px; }

.field { display: grid; gap: 6px; margin-bottom: 12px; }
.field label, .field span { font-size: 13px; color: var(--muted); }

.field input, .field select {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  background: #fefcf8;
}

.field textarea {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink);
  background: #fefcf8;
  resize: vertical;
  line-height: 1.6;
}

.field-note { font-size: 12px; color: var(--muted); }

.stack { display: grid; gap: 12px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.actions .notice { flex-basis: 100%; }

.inline { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.chip-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.chip {
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 12px;
  background: #fdfaf3;
  cursor: pointer;
  transition: border 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  min-height: 80px;
  text-align: left;
}

.chip.active {
  border: 2px solid var(--brand);
  box-shadow: 0 8px 20px rgba(15, 111, 109, 0.18);
  transform: translateY(-2px);
  background: #f1fbf9;
}

.chip-title { font-weight: 700; margin-bottom: 6px; }
.chip-desc { font-size: 13px; color: var(--muted); }

.room-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.room-card .room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.room-label { font-weight: 700; font-size: 16px; }

.summary-strip {
  background: #f1fbf9;
  border-radius: 14px;
  padding: 12px 14px;
  border: 1px dashed rgba(15, 111, 109, 0.3);
  font-size: 14px;
  display: grid;
  gap: 6px;
}

.notice {
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 13px;
  border: 1px solid;
}

.notice.warn { background: #fff5e0; border-color: rgba(183, 110, 0, 0.35); color: var(--warn); }
.notice.error { background: #ffe9e6; border-color: rgba(180, 35, 24, 0.35); color: var(--danger); }
.notice.ok { background: #e9f7f0; border-color: rgba(22, 123, 78, 0.35); color: var(--ok); }

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f9f4e6;
  border-radius: 999px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  font-size: 13px;
}

.toggle input {
  width: 40px;
  height: 20px;
  appearance: none;
  background: #d6e3e1;
  border-radius: 999px;
  position: relative;
  outline: none;
  cursor: pointer;
}

.toggle input::after {
  content: "";
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

.toggle input:checked { background: var(--brand); }
.toggle input:checked::after { transform: translateX(20px); }

.result-grid { display: grid; gap: 12px; }
.room-result { display: grid; gap: 6px; }

.room-result .headline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.room-result .amount { font-size: 22px; font-weight: 700; color: var(--brand); }

.details-toggle { cursor: pointer; font-weight: 600; color: var(--brand); }

.divider { height: 1px; background: var(--line); margin: 12px 0; }

.policy-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--ink);
}

.policy-list li { line-height: 1.5; }

.policy-meta {
  font-size: 12px;
  color: var(--muted);
  display: grid;
  gap: 6px;
}

.policy-meta a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
}

.policy-meta a:hover { text-decoration: underline; }

.history-list { display: grid; gap: 12px; }

.history-item {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  background: #fdfbf7;
  display: grid;
  gap: 8px;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.history-title { font-weight: 700; font-size: 15px; }
.history-meta { font-size: 12px; color: var(--muted); }

.history-text {
  white-space: pre-wrap;
  font-size: 13px;
  background: #f7f3ea;
  padding: 10px;
  border-radius: 12px;
  border: 1px dashed var(--line);
}

.export-area {
  background: #ffffff;
  border-radius: 20px;
  padding: 18px;
  border: 1px solid var(--line);
}

.export-area.exporting { width: 1080px; max-width: 1080px; }

.export-meta { font-size: 11px; color: #8b8b8b; margin-top: 8px; }

.hidden { display: none; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(12, 29, 29, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 10;
}

.modal-backdrop.active { display: flex; }

.modal {
  background: white;
  width: min(460px, 92vw);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 16px;
  background: #0f2f2f;
  color: white;
  border-radius: 12px;
  font-size: 14px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 20;
}

.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 640px) {
  #app { padding: 16px 14px 50px; }
  .title { font-size: 18px; }
  .btn { width: 100%; }
}