:root {
  --bg:            #eef2f7;
  --surface:       #ffffff;
  --surface-2:     #f7f9fc;
  --surface-3:     #f0f4f8;
  --text:          #0f172a;
  --text-light:    #374151;
  --muted:         #64748b;
  --border:        #e2e8f0;
  --border-light:  #f1f5f9;
  --accent:        #2563eb;
  --accent-dark:   #1d4ed8;
  --accent-bg:     #eff6ff;
  --danger:        #dc2626;
  --danger-bg:     #fef2f2;
  --green:         #16a34a;
  --green-bg:      #f0fdf4;
  --green-border:  #86efac;
  --amber:         #b45309;
  --amber-bg:      #fffbeb;
  --amber-border:  #fcd34d;
  --shadow-xs: 0 1px 2px rgba(0,0,0,.05);
  --shadow-sm: 0 1px 6px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.03);
  --shadow:    0 4px 18px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.13), 0 4px 8px rgba(0,0,0,.06);
  --radius:    16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --sidebar-w: 340px;
  --gap:       14px;
}

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

html, body { height: 100%; margin: 0; overflow: hidden; }

body {
  font-family: "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* ── App shell ── */
.app-shell {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: var(--gap);
  gap: var(--gap);
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

/* ── Header ── */
.topbar {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1e3a70 0%, #2563eb 60%, #3b82f6 100%);
  box-shadow: 0 4px 20px rgba(37,99,235,.35);
}
.topbar-brand { display: flex; align-items: center; gap: 13px; }
.brand-icon {
  font-size: 1.5rem;
  background: rgba(255,255,255,.2);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 12px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.topbar h1 { margin: 0; font-size: 1.15rem; font-weight: 700; color: #fff; letter-spacing: -.01em; }
.topbar p  { margin: 1px 0 0; color: rgba(255,255,255,.65); font-size: .75rem; }
.actions   { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }

/* ── Trip code chip ── */
.trip-code-chip {
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(255,255,255,.13);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius-sm);
  padding: 5px 11px;
  flex-shrink: 0;
}
.trip-label {
  font-size: .68rem;
  color: rgba(255,255,255,.65);
  white-space: nowrap;
}
#tripCodeDisplay {
  font-family: "Courier New", monospace;
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: .12em;
}
#copyTripBtn {
  background: transparent;
  border: none;
  padding: 2px 4px;
  font-size: .85rem;
  color: rgba(255,255,255,.8);
  cursor: pointer;
  border-radius: 4px;
}
#copyTripBtn:hover { background: rgba(255,255,255,.15); }
.trip-code-chip .tool-btn {
  font-size: .72rem;
  padding: 3px 9px;
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.25);
  color: #fff;
}
.trip-code-chip .tool-btn:hover { background: rgba(255,255,255,.28); }

/* ── Main view (map + sidebar) ── */
.page-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: var(--gap);
}

/* ── Map column ── */
.map-column { display: flex; flex-direction: column; min-height: 0; }

.map-card {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.map-toolbar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

/* Map search */
.map-search { flex: 1; position: relative; min-width: 0; }
.map-search-icon {
  position: absolute;
  left: 10px; top: 50%;
  transform: translateY(-50%);
  font-size: .82rem;
  pointer-events: none;
  opacity: .5;
}
.map-search input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px 7px 32px;
  font: .85rem "Noto Sans TC", sans-serif;
  background: var(--surface-2);
  color: var(--text);
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.map-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
  background: var(--surface);
}
.map-search input::placeholder { color: var(--muted); }
.map-search input { padding-right: 32px; }
.map-search-clear {
  position: absolute;
  right: 8px; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  color: var(--muted); font-size: .8rem;
  cursor: pointer; padding: 2px 4px;
  line-height: 1;
}
.map-search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  list-style: none;
  margin: 0; padding: 4px 0;
  z-index: 999;
  max-height: 260px;
  overflow-y: auto;
}
.map-search-item {
  display: flex;
  flex-direction: column;
  padding: 9px 14px;
  cursor: pointer;
  gap: 2px;
}
.map-search-item:hover { background: var(--surface-2); }
.map-search-item-main { font-size: .88rem; font-weight: 500; color: var(--text); }
.map-search-item-sub  { font-size: .75rem; color: var(--muted); }

/* Google Places autocomplete */
.pac-container {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-family: "Noto Sans TC", sans-serif;
  font-size: .875rem;
  margin-top: 4px;
}
.pac-item { padding: 9px 13px; cursor: pointer; line-height: 1.5; }
.pac-item:hover, .pac-item-selected { background: var(--accent-bg); }
.pac-icon { display: none; }
.pac-item-query { font-weight: 600; color: var(--text); }
.pac-matched { color: var(--accent); }

.map-toolbar-btns { display: flex; gap: 6px; flex-shrink: 0; }

#map { flex: 1; min-height: 0; width: 100%; }

.map-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px;
  color: var(--muted);
  gap: 12px;
}
.map-empty-icon { font-size: 3.2rem; }
.map-empty p { margin: 0; font-size: .9rem; line-height: 1.75; }

/* ── Sidebar ── */
.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.sidebar-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.panel-header {
  flex-shrink: 0;
  padding: 14px 16px 10px;
}
.panel-header h2 {
  margin: 0;
  font-size: .88rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
}
.loc-count-badge {
  font-size: .7rem;
  font-weight: 400;
  color: var(--muted);
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  margin-left: 2px;
}

/* ── Sidebar tabs ── */
.sidebar-tabs {
  flex-shrink: 0;
  display: flex;
  gap: 4px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.tab-btn {
  flex: 1;
  padding: 6px 4px;
  font-size: .78rem;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--muted);
  transition: color .15s, background .15s, border-color .15s;
  box-shadow: none;
  text-align: center;
}
.tab-btn:hover { background: var(--surface); color: var(--text); }
.tab-btn.active {
  background: var(--accent-bg);
  border-color: rgba(37,99,235,.2);
  color: var(--accent);
  font-weight: 700;
}

.tab-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.tab-panel.hidden { display: none !important; }

/* Locations search bar */
.loc-search-wrap {
  flex-shrink: 0;
  position: relative;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.loc-search-icon {
  position: absolute;
  left: 19px; top: 50%;
  transform: translateY(-50%);
  font-size: .78rem;
  pointer-events: none;
  opacity: .45;
}
.loc-search-wrap input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px 6px 28px;
  font: .82rem "Noto Sans TC", sans-serif;
  background: var(--surface-2);
  color: var(--text);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.loc-search-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
  background: var(--surface);
}
.loc-search-wrap input::placeholder { color: var(--muted); }

/* ── Locations list ── */
.locations-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.loc-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.loc-item:hover {
  border-color: rgba(37,99,235,.3);
  box-shadow: 0 2px 10px rgba(37,99,235,.07);
  background: #fafcff;
}

.loc-num {
  flex-shrink: 0;
  width: 26px; height: 26px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  border-radius: 8px;
  font-size: .72rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-top: 1px;
  box-shadow: 0 2px 6px rgba(37,99,235,.3);
}

.loc-info { flex: 1; min-width: 0; }
.loc-name { font-weight: 600; font-size: .88rem; line-height: 1.4; color: var(--text); }
.loc-note { font-size: .77rem; color: var(--muted); margin-top: 2px; line-height: 1.4; }
.loc-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}
.loc-budget {
  font-size: .72rem;
  font-weight: 700;
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  border-radius: 999px;
  padding: 1px 8px;
}
.loc-discuss-count {
  font-size: .72rem;
  color: var(--accent);
  font-weight: 600;
  opacity: .75;
}

.loc-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  margin-top: 0;
  align-self: center;
}

/* ── Discuss view ── */
.discuss-view {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.discuss-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

/* ── Discuss info inline (header 內嵌一行) ── */
.discuss-info-inline {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.dic-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  flex-shrink: 0;
}

.dic-icon {
  font-size: 1rem;
  flex-shrink: 0;
  line-height: 1;
}

.dic-name {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
  max-width: 220px;
}

/* 下方展開的詳細區塊 */
.discuss-info-detail {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.dic-detail-field {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.dic-val {
  font-size: .84rem;
  color: var(--text-light);
}

.dic-label {
  font-size: .68rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.dic-price {
  font-weight: 700;
  color: var(--green);
  font-size: .78rem;
}

.dic-purchased   { font-size: .75rem; font-weight: 600; color: var(--green); }
.dic-unpurchased { font-size: .75rem; font-weight: 600; color: var(--amber); }

.dic-toggle-btn {
  flex-shrink: 0;
  width: 22px; height: 22px;
  padding: 0;
  font-size: .7rem;
  color: var(--muted);
  border-color: var(--border);
  border-radius: var(--radius-xs);
  background: var(--surface-2);
  display: flex; align-items: center; justify-content: center;
}
.dic-toggle-btn:hover { color: var(--accent); border-color: rgba(37,99,235,.3); background: var(--accent-bg); }

.dic-spacer { flex: 1; min-width: 4px; }

.edit-info-btn {
  flex-shrink: 0;
  padding: 5px 13px;
  font-size: .78rem;
  color: var(--muted);
  border-color: var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}
.edit-info-btn:hover {
  color: var(--accent);
  border-color: rgba(37,99,235,.3);
  background: var(--accent-bg);
}

.discuss-msgs {
  flex: 1;
  overflow-y: auto;
  padding: 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface-3);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.d-item {
  max-width: 660px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  padding: 11px 14px;
  box-shadow: var(--shadow-xs);
  transition: border-color .15s, box-shadow .15s;
}
.d-item:hover {
  border-color: rgba(37,99,235,.2);
  box-shadow: var(--shadow-sm);
}

.d-item-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.d-author {
  font-weight: 700;
  font-size: .8rem;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 1px 8px;
  border-radius: 999px;
}
.d-time   { font-size: .7rem; color: var(--muted); }
.d-del    {
  margin-left: auto;
  border: none;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: .78rem;
  padding: 2px 4px;
  line-height: 1;
  border-radius: 4px;
  transition: color .15s, background .15s;
}
.d-del:hover { color: var(--danger); background: var(--danger-bg); }

.d-text { margin: 0; font-size: .875rem; line-height: 1.65; white-space: pre-wrap; color: var(--text-light); }

.discuss-form {
  flex-shrink: 0;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.discuss-inputs {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.discuss-form button[type="submit"] {
  flex-shrink: 0;
  align-self: flex-end;
  padding: 9px 18px;
  white-space: nowrap;
}

/* ── Empty state ── */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 36px 16px;
  color: var(--muted);
  gap: 10px;
}
.empty-icon { font-size: 2.4rem; opacity: .6; }
.empty-state p { margin: 0; font-size: .84rem; line-height: 1.7; }

/* ── Buttons ── */
button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font: 500 .875rem "Noto Sans TC", sans-serif;
  cursor: pointer;
  transition: background .15s, border-color .15s, box-shadow .15s, transform .1s;
  display: inline-flex; align-items: center; gap: 5px;
}
button:hover { background: var(--surface-2); border-color: #c9d5e2; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,.3);
}
button.primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: 0 4px 14px rgba(37,99,235,.38);
  transform: translateY(-1px);
}

button.danger {
  border-color: #fecaca;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: .78rem;
  padding: 4px 9px;
}
button.danger:hover { background: #fee2e2; border-color: #f87171; }

.icon-btn {
  width: 28px; height: 28px;
  padding: 0;
  font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-xs);
}
.icon-btn.edit  { color: var(--muted); border-color: var(--border); }
.icon-btn.edit:hover  { color: var(--accent); border-color: rgba(37,99,235,.35); background: var(--accent-bg); }
.icon-btn.del   { border-color: #fecaca; background: var(--danger-bg); color: var(--danger); }
.icon-btn.del:hover   { background: #fee2e2; border-color: #f87171; }

.tool-btn { font-size: .78rem; padding: 5px 12px; }
.tool-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.tool-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.back-btn {
  font-size: .82rem;
  padding: 7px 13px;
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--text-light);
  background: var(--surface-2);
}
.back-btn:hover { background: var(--surface-3); }

.topbar button {
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.25);
  color: #fff;
  font-size: .85rem;
}
.topbar button:hover { background: rgba(255,255,255,.28); transform: none; box-shadow: none; }
.topbar button.primary { background: rgba(255,255,255,.22); border-color: rgba(255,255,255,.4); box-shadow: none; }
.topbar button.primary:hover { background: rgba(255,255,255,.35); }

.hidden { display: none !important; }

/* ── Forms ── */
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: .74rem; font-weight: 700; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
.req { color: var(--danger); }
.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; min-width: 0; }

input, textarea {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-sm);
  padding: 8px 11px;
  font: .875rem "Noto Sans TC", sans-serif;
  color: var(--text);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
input::placeholder, textarea::placeholder { color: #adb5c4; }
textarea { min-height: 64px; resize: vertical; }

/* ── Dialogs ── */
dialog {
  border: none;
  border-radius: var(--radius);
  max-width: 460px;
  width: calc(100% - 32px);
  padding: 0;
  box-shadow: var(--shadow-lg);
}
dialog::backdrop { background: rgba(15,23,42,.45); backdrop-filter: blur(6px); }

.dialog-header { padding: 20px 22px 14px; border-bottom: 1px solid var(--border); }
.dialog-header h3 { margin: 0 0 3px; font-size: 1rem; font-weight: 700; }
.dialog-header p  { margin: 0; color: var(--muted); font-size: .8rem; }

.dialog-body { padding: 16px 22px; display: grid; gap: 13px; }

.dialog-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 22px;
  margin: 0;
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ── Plan view ── */
.plan-view {
  flex: 1;
  min-height: 0;
}

.plan-layout {
  height: 100%;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--gap);
}

/* Left: pool column */
.plan-pool-col {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  min-height: 0;
}

.plan-pool-head {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.plan-pool-head h2 { margin: 0; font-size: .9rem; font-weight: 700; }
.plan-pool-head p  { margin: 2px 0 0; color: var(--muted); font-size: .73rem; }

.plan-pool {
  flex: 1;
  min-height: 60px;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Right column: map + selected panel */
.plan-right-col {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-height: 0;
}

.plan-map-wrap {
  flex: 1;
  min-height: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.plan-map {
  width: 100%;
  height: 100%;
}

/* Selected route panel (bottom-right) */
.plan-selected-panel {
  flex-shrink: 0;
  height: 210px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.plan-selected-head {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.plan-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.plan-summary-sep { color: var(--border); }

.plan-list {
  flex: 1;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 8px 10px;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 7px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Draggable card */
.plan-card {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: grab;
  transition: box-shadow .15s, opacity .15s, border-color .15s;
  user-select: none;
}
.plan-card:active { cursor: grabbing; }
.plan-card:hover  { box-shadow: var(--shadow); border-color: rgba(37,99,235,.3); }
.plan-card.dragging { opacity: .35; }
.plan-card.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

/* Pool cards: vertical layout, full width */
.pool-card {
  width: 100%;
  flex-shrink: 0;
}

/* Selected cards: fixed width, horizontal scroll */
.plan-list .plan-card {
  flex-shrink: 0;
  width: 160px;
  flex-direction: column;
  gap: 6px;
  align-items: stretch;
}

.plan-drag-handle {
  font-size: 1rem;
  color: var(--muted);
  cursor: grab;
  flex-shrink: 0;
  align-self: center;
  opacity: .5;
}

.plan-card-num {
  flex-shrink: 0;
  width: 22px; height: 22px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  border-radius: 6px;
  font-size: .68rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 5px rgba(37,99,235,.28);
}

.plan-card-info { flex: 1; min-width: 0; }
.plan-card-name { font-weight: 600; font-size: .84rem; line-height: 1.35; }
.plan-card-note { font-size: .72rem; color: var(--muted); margin-top: 2px; }
.plan-card-budget {
  display: inline-block;
  margin-top: 5px;
  font-size: .7rem;
  font-weight: 700;
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  border-radius: 999px;
  padding: 1px 7px;
}

/* Zone drag-over highlight */
.plan-pool.zone-drag-over,
.plan-list.zone-drag-over {
  background: var(--accent-bg);
  outline: 2px dashed rgba(37,99,235,.4);
  outline-offset: -3px;
  border-radius: var(--radius-sm);
}

/* ── Transport ── */
.purchased-check-label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: .875rem;
  cursor: pointer;
  padding: 4px 0;
  color: var(--text-light);
}
.purchased-check-label input { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; }

.transport-status-btn {
  font-size: .7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
}
.transport-status-btn:hover { opacity: .8; transform: scale(.97); }
.transport-status-price {
  font-weight: 700;
  margin-left: 5px;
  opacity: .85;
}
.transport-status-btn.purchased {
  color: var(--green);
  background: var(--green-bg);
  border-color: var(--green-border);
}
.transport-status-btn.unpurchased {
  color: var(--amber);
  background: var(--amber-bg);
  border-color: var(--amber-border);
}

.transport-num {
  flex-shrink: 0;
  width: 30px; height: 30px;
  font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 0;
}

/* ── Packing ── */
.packing-add-bar {
  flex-shrink: 0;
  display: flex;
  gap: 6px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.packing-add-bar input { flex: 1; }
.packing-add-bar button { flex-shrink: 0; padding: 6px 14px; }

.packing-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color .15s, opacity .2s;
}
.packing-item:hover { border-color: #c9d5e2; }
.packing-item.checked { opacity: .5; }
.packing-item.checked .packing-name { text-decoration: line-through; color: var(--muted); }

.packing-check {
  width: 16px; height: 16px;
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
.packing-name { flex: 1; font-size: .88rem; color: var(--text-light); }

/* Shared list container override for packing (uses gap not border-bottom) */
#packingList {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  html, body { height: auto; overflow: auto; }
  body { display: block; }
  .app-shell { flex: none; height: auto; min-height: 100vh; overflow: visible; }
  .page-layout { grid-template-columns: 1fr; height: auto; flex: none; }
  .map-column { height: auto; }
  .map-card { height: 380px; flex: none; }
  .sidebar { overflow: visible; min-height: 300px; }
  .discuss-view { min-height: 100vh; flex: none; }
  .plan-layout { grid-template-columns: 1fr; }
  .plan-right-col { min-height: 500px; }
  .plan-map-wrap { min-height: 300px; }
  .plan-selected-panel { height: auto; min-height: 160px; }
  .plan-list { flex-direction: row; overflow-x: auto; overflow-y: hidden; }
}

/* ── Plan 按鈕（手機點按）── */
.plan-tap-add {
  flex-shrink: 0;
  width: 28px; height: 28px;
  padding: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  border-color: rgba(37,99,235,.3);
  background: var(--accent-bg);
  border-radius: var(--radius-xs);
  display: flex; align-items: center; justify-content: center;
  align-self: center;
}
.plan-tap-add:hover { background: var(--accent); color: #fff; }

.plan-tap-remove {
  flex-shrink: 0;
  width: 22px; height: 22px;
  padding: 0;
  font-size: .7rem;
  color: var(--danger);
  border-color: #fecaca;
  background: var(--danger-bg);
  border-radius: var(--radius-xs);
  display: flex; align-items: center; justify-content: center;
  align-self: flex-start;
}
.plan-tap-remove:hover { background: #fee2e2; }

/* ── 手機版 RWD ── */
@media (max-width: 640px) {
  /* 討論頁 header */
  .discuss-header { flex-wrap: wrap; gap: 8px; }
  .discuss-info-inline { min-width: 0; }
  .dic-name { max-width: 160px; }

  /* 側邊欄 tabs 文字縮小 */
  .tab-btn { font-size: .72rem; padding: 5px 2px; }

  /* 規劃行程：手機改垂直排列，地圖移到底部 */
  .plan-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .plan-pool-col { max-height: 40vh; }
  .plan-right-col { flex-direction: column-reverse; }
  .plan-map-wrap  { min-height: 220px; max-height: 260px; flex: none; }
  .plan-selected-panel { height: auto; }
  .plan-list {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    max-height: 220px;
  }
  .plan-list .plan-card { width: 100%; flex-direction: row; align-items: center; }

  /* 讓容器可以單指捲動 */
  .plan-pool, .locations-list, .discuss-msgs { touch-action: pan-y; }
}

/* ── Transport tags ── */
.transport-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 3px 0 2px;
}
.transport-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-light);
  font-size: .72rem;
  line-height: 1.6;
}
.transport-final-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  border-radius: 20px;
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  color: var(--green);
  font-size: .68rem;
  font-weight: 600;
  margin-left: 6px;
  vertical-align: middle;
}

/* ── Final toggle button (discuss view) ── */
.final-toggle-btn {
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  font-size: .72rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, color .15s, border-color .15s;
}
.final-toggle-btn.is-final {
  background: var(--green-bg);
  border-color: var(--green-border);
  color: var(--green);
  font-weight: 600;
}

/* ── Plan transport section ── */
.plan-transport-section {
  border-top: 1px solid var(--border);
  padding: 10px 12px 8px;
}
.plan-transport-head {
  font-size: .75rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.plan-transport-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: .8rem;
}
.plan-transport-card:last-child { border-bottom: none; }
.plan-transport-method { font-weight: 600; color: var(--text); }

/* ── Trips list page ── */
.trips-page {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.trips-header {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1e3a70 0%, #2563eb 60%, #3b82f6 100%);
  box-shadow: 0 4px 20px rgba(37,99,235,.35);
  flex-wrap: wrap;
}

.trips-header .topbar-brand { flex: 1; min-width: 0; }
.trips-header h1 { margin: 0; font-size: 1.15rem; font-weight: 700; color: #fff; }
.trips-header p  { margin: 2px 0 0; color: rgba(255,255,255,.65); font-size: .75rem; }

.trips-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

.trips-list {
  flex: 1;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
}

.trip-list-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, background .15s;
  box-shadow: var(--shadow-xs);
}
.trip-list-card:hover {
  border-color: rgba(37,99,235,.3);
  box-shadow: var(--shadow);
  background: #fafcff;
}

.trip-list-info { flex: 1; min-width: 0; }

.trip-list-name {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.trip-list-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.trip-list-code {
  font-family: "Courier New", monospace;
  font-size: .78rem;
  color: var(--muted);
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  letter-spacing: .1em;
}

.trip-status-badge {
  font-size: .68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid;
}
.trip-status-badge.is-editing {
  color: var(--amber);
  background: var(--amber-bg);
  border-color: var(--amber-border);
}
.trip-status-badge.is-finalized {
  color: var(--green);
  background: var(--green-bg);
  border-color: var(--green-border);
}

.trip-list-date {
  margin-top: 5px;
  font-size: .72rem;
  color: var(--muted);
}

.trip-list-arrow {
  font-size: 1.4rem;
  color: var(--muted);
  flex-shrink: 0;
  opacity: .45;
}

/* ── Main page wrapper ── */
.main-page {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

/* ── New topbar layout (left/right groups) ── */
.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-width: 0;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.trip-name-wrap {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
}
.trip-name-display {
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.topbar-back {
  font-size: .78rem;
  padding: 5px 11px;
  white-space: nowrap;
  background: rgba(255,255,255,.15) !important;
  border-color: rgba(255,255,255,.25) !important;
  color: #fff !important;
}
.topbar-back:hover { background: rgba(255,255,255,.28) !important; }

.topbar-icon-btn {
  width: 26px; height: 26px;
  padding: 0;
  font-size: .8rem;
  background: rgba(255,255,255,.15) !important;
  border-color: rgba(255,255,255,.2) !important;
  color: rgba(255,255,255,.8) !important;
  border-radius: var(--radius-xs);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.topbar-icon-btn:hover { background: rgba(255,255,255,.28) !important; }

/* Finalized badge in topbar */
.finalized-status-badge {
  font-size: .72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  color: var(--green);
  white-space: nowrap;
}

/* topbar-tool: uses existing .tool-btn style, just needs white color */
.topbar .topbar-tool {
  font-size: .78rem;
  padding: 5px 11px;
}

/* ── Packing sections ── */
.packing-user-bar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 6px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.packing-user-name {
  font-size: .78rem;
  font-weight: 600;
  color: var(--accent);
  flex: 1;
}
.packing-user-name::before {
  content: "👤 ";
  font-style: normal;
}

.packing-section {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.packing-section-head {
  padding: 7px 14px 5px;
  font-size: .7rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-2);
}

.packing-empty {
  padding: 10px 14px;
  font-size: .8rem;
  color: var(--muted);
  font-style: italic;
}

/* Packing tab panel: scroll as one unit */
#packingPanel {
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Packing list containers */
#packingSharedList,
#packingPersonalList {
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Packing add bar inside sections: no extra border since section-head already separates */
.packing-section .packing-add-bar {
  border-bottom: none;
  border-top: none;
  background: var(--surface);
}

/* ── iOS 安全區域（瀏海 / 底部 Home Bar）── */
@supports (padding: env(safe-area-inset-top)) {
  .app-shell {
    padding-top:    max(var(--gap), env(safe-area-inset-top));
    padding-bottom: max(var(--gap), env(safe-area-inset-bottom));
    padding-left:   max(var(--gap), env(safe-area-inset-left));
    padding-right:  max(var(--gap), env(safe-area-inset-right));
  }
  .discuss-form {
    padding-bottom: max(14px, calc(env(safe-area-inset-bottom) + 8px));
  }
}

/* ── Location card: hours + discuss button ── */
.loc-hours {
  font-size: .72rem;
  color: var(--muted);
  margin-top: 3px;
  line-height: 1.4;
}

.loc-discuss-btn {
  font-size: .72rem;
  color: var(--accent);
  font-weight: 600;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  opacity: .75;
  box-shadow: none;
  border-radius: 0;
  gap: 0;
}
.loc-discuss-btn:hover { opacity: 1; background: transparent; border: none; transform: none; box-shadow: none; text-decoration: underline; }

/* ── Nearby search bar ── */
.nearby-bar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  overflow-x: auto;
  scrollbar-width: none;
}
.nearby-bar::-webkit-scrollbar { display: none; }

.nearby-label {
  font-size: .7rem;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.nearby-btn {
  flex-shrink: 0;
  padding: 4px 10px;
  font-size: .75rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-light);
  box-shadow: none;
  white-space: nowrap;
  transition: background .15s, border-color .15s, color .15s;
  gap: 3px;
}
.nearby-btn:hover  { background: var(--accent-bg); border-color: rgba(37,99,235,.3); color: var(--accent); }
.nearby-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Discuss view: opening hours ── */
.dic-detail-full {
  width: 100%;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}
.dic-hours-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 3px;
}
.dic-hours-row {
  font-size: .78rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ── Trips & main page responsive ── */
@media (max-width: 640px) {
  .trips-header { padding: 12px 14px; gap: 10px; }
  .trips-header h1 { font-size: 1rem; }
  .trips-actions { width: 100%; }
  .trips-actions button { flex: 1; justify-content: center; font-size: .82rem; }
  .trips-list { padding: 10px 0; gap: 8px; }
  .trip-list-card { padding: 12px 14px; }

  /* Topbar: two-row layout on mobile */
  .topbar {
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 12px;
  }
  .topbar-left {
    flex: 1;
    min-width: 0;
    order: 1;
  }
  .topbar-right {
    order: 2;
    width: 100%;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
  }
  .trip-name-display { max-width: 150px; }
  .trip-code-chip { flex: 1; justify-content: center; }
  #openPlanBtn { flex: 1; justify-content: center; }
}