/* 宜兴之旅 —— 主题与版式
   页面基调是素色（近白）；四个感官主题只作用于菜单（卡片池）区域，
   由该区域元素上的 [data-theme] + CSS variables 驱动。
   色板出自 docs/static-interaction-model.md（做了对比度微调）。 */

:root {
  /* 卡片主题固定色（不随区域主题变化） */
  --c-dingshu: #b74b2b;
  --c-spring: #7fa32a;
  --c-bamboo: #2d8f83;
  --c-food: #9d6b43;
  --c-night: #d8a451;
  --c-flex: #8a8d86;

  /* 素色基调（近白） */
  --bg: #fafaf9;
  --text: #1f1f1f;
  --accent: #b44a2c;
  --surface: #ffffff;
  --muted: #79706a;
  --line: #e7e5e0;
  --chip-bg: rgba(0, 0, 0, 0.045);
  --warn: #b3541e;
  --warn-bg: rgba(179, 84, 30, 0.09);
  --shadow: 0 1px 3px rgba(30, 20, 10, 0.06);
}

[data-theme="dingshu"] {
  --bg: #f7eee7;
  --text: #26201b;
  --accent: #b74b2b;
  --surface: #fffaf6;
  --muted: #8a7568;
  --line: #e9d9cd;
}

[data-theme="spring"] {
  --bg: #f4f6df;
  --text: #252a19;
  --accent: #7fa32a;
  --surface: #fcfdf3;
  --muted: #7f865f;
  --line: #e2e6c6;
}

[data-theme="bamboo-water"] {
  --bg: #edf5f2;
  --text: #1d2c29;
  --accent: #2d8f83;
  --surface: #f9fcfb;
  --muted: #64807a;
  --line: #d6e5e0;
}

[data-theme="food"] {
  --bg: #f4ede2;
  --text: #2a2118;
  --accent: #9a6437;
  --surface: #fbf6ee;
  --muted: #86745e;
  --line: #e8dcc9;
}

[data-theme="flex"] {
  --bg: #f1f2f0;
  --text: #24251f;
  --accent: #6f716a;
  --surface: #fbfbf9;
  --muted: #7b7d75;
  --line: #e3e4df;
}

[data-theme="night"] {
  --bg: #2c2620;          /* 暖夜灰而非近黑：降低与其余素色页面的对比 */
  --text: #e7ddcd;        /* 文字调暗一档，减小刺眼的高对比 */
  --accent: #cf9a4b;
  --surface: #37302a;
  --muted: #a1927c;
  --line: #453d33;
  --chip-bg: rgba(255, 255, 255, 0.06);
  --warn: #e0904f;
  --warn-bg: rgba(224, 144, 79, 0.14);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.28);
}

/* 卡片固定主题色映射 */
[data-card-theme="dingshu"] { --card-accent: var(--c-dingshu); }
[data-card-theme="spring"] { --card-accent: var(--c-spring); }
[data-card-theme="bamboo-water"] { --card-accent: var(--c-bamboo); }
[data-card-theme="food"] { --card-accent: var(--c-food); }
[data-card-theme="night"] { --card-accent: var(--c-night); }
[data-card-theme="flex"] { --card-accent: var(--c-flex); }

/* ---------- 基础 ---------- */

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  transition: background-color 0.45s ease, color 0.45s ease;
  /* 移动端：给底部 tab 栏 + hint/snackbar 留空间 */
  padding-bottom: calc(136px + env(safe-area-inset-bottom, 0px));
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding-left: 18px;
  padding-right: 18px;
}

h1, h2, h3 { font-weight: 600; margin: 0; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* ---------- 页头 ---------- */

.site-header { padding-top: 40px; }

.kicker {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.kicker-link { color: inherit; text-decoration: none; transition: color 0.2s ease; }
.kicker-link:hover, .kicker-link:focus-visible { color: var(--accent); }

.site-header h1 { font-size: 24px; letter-spacing: 0.02em; }

/* ---------- 感官菜单（卡片池视图内：主题切换 + 筛选） ---------- */

.theme-menu {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.theme-menu::-webkit-scrollbar { display: none; }

.theme-menu button {
  flex: 0 0 auto;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 13px;
  color: var(--muted);
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.theme-menu button:hover { border-color: var(--accent); }

.theme-menu button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
[data-theme="night"] .theme-menu button[aria-pressed="true"] { color: #181715; }

/* ---------- 布局 ---------- */

.layout { padding-top: 22px; }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.section-head h2 { font-size: 16px; letter-spacing: 0.04em; }

.section-note {
  margin: 6px 0 14px;
  font-size: 12.5px;
  color: var(--muted);
}

.pool-section { margin-bottom: 40px; }
.plan-section { margin-bottom: 40px; }
.graph-section { margin-bottom: 48px; }

/* （视图系统的响应式规则在文件末尾，需要排在组件规则之后才能正确覆盖） */

/* ---------- 菜单（卡片池）：唯一带感官主题的区域 ---------- */

#view-pool {
  border-radius: 14px;
  padding: 14px 16px 16px;
  /* 「全部」时也有面板：比页面底色深一档的同色系 */
  background: #f1f0ec;
  transition: background-color 0.45s ease, color 0.45s ease;
}

#view-pool[data-theme] {
  background: var(--bg);
  color: var(--text); /* night 等深色主题需要跟着换文字色 */
}

.pool-group { margin-bottom: 22px; }

.pool-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 10px;
}

.pool-group-title::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--card-accent, var(--accent));
}

.pool-cards { display: grid; gap: 8px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--card-accent, var(--line));
  border-radius: 10px;
  padding: 10px 12px;
  box-shadow: var(--shadow);
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: pan-y;
  transition: border-color 0.2s ease, opacity 0.2s ease, transform 0.15s ease;
}

.card:hover { transform: translateY(-1px); }

.card--selected {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 0;
}

.card--assigned { opacity: 0.5; }

.card--light {
  background: transparent;
  border-style: dashed;
  border-left-width: 1px;
  box-shadow: none;
}

.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.card-title { font-size: 14.5px; font-weight: 600; }

.card-duration {
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.card-summary {
  margin: 3px 0 7px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.55;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  align-items: center;
}

.chip, .badge {
  display: inline-block;
  font-size: 10.5px;
  line-height: 1;
  padding: 4px 7px;
  border-radius: 6px;
  letter-spacing: 0.03em;
}

.chip { background: var(--chip-bg); color: var(--muted); }

.chip-loc { border: 1px solid var(--line); background: transparent; }

.badge-res {
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
}

.badge-heat { color: var(--warn); background: var(--warn-bg); }

.badge-tbc {
  color: var(--muted);
  border: 1px dashed var(--line);
  background: transparent;
}

/* 可重复卡：放一次不会“用掉”，可再放 */
.badge-repeat {
  color: var(--card-accent, var(--muted));
  border: 1px solid currentColor;
  background: transparent;
}

.chip-assigned { color: var(--accent); background: transparent; padding-left: 0; }

/* ---------- 行程日历（自动叠放 + 翻天） ---------- */

.day-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 4px 0 10px;
}

#day-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.day-pager button:disabled { opacity: 0.3; cursor: default; }

#day-canvas {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 220px;
  border-radius: 12px;
}

#day-canvas.drop-hint,
.drop-hint {
  outline: 2px dashed var(--accent);
  outline-offset: 4px;
}

.cal-event {
  position: relative; /* 移出按钮以块为参照定位 */
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--card-accent, var(--line));
  border-radius: 10px;
  padding: 8px 12px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 2px;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: pan-y;
}

/* 块按时长拉高后：属性标签沉向底部，但与下边框保持和左侧一致的间距（8+4=12px） */
.cal-event .card-meta { margin-top: auto; padding-top: 6px; margin-bottom: 4px; }

.cal-event .slot-remove {
  position: absolute;
  top: 7px;
  right: 7px;
}

/* 插入位置提示：上缘出现一条 accent 线 */
.cal-event--before { box-shadow: 0 -3px 0 0 var(--accent), var(--shadow); }

.cal-event.card--selected { outline: 2px solid var(--accent); }

.cal-event-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding-right: 48px; /* 给右上角的移出按钮让位 */
}

.cal-time {
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.cal-event-title { font-size: 14px; font-weight: 600; }

.cal-travel {
  margin-left: 22px;
  padding: 2px 0 2px 10px;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 11.5px;
  display: flex;
  align-items: center;
}

.cal-travel--est { border-left-style: dashed; }

.cal-travel--broken {
  border-left-color: var(--warn);
  color: var(--warn);
}

.cal-empty {
  margin: 0;
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 30px 14px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
}

.cal-summary {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.cal-summary--warn { color: var(--warn); }

.cal-stay {
  margin-top: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-night);
  border-radius: 10px;
  padding: 9px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: pan-y;
}

.cal-stay--empty {
  background: transparent;
  border-style: dashed;
  color: var(--muted);
  font-size: 12.5px;
}

.cal-stay.card--selected { outline: 2px solid var(--accent); }

.cal-stay-title { font-weight: 600; }

.slot-remove {
  font-size: 11px;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--line);
  flex: 0 0 auto;
}
.slot-remove:hover { color: var(--warn); border-color: var(--warn); }

/* ---------- preset / 操作按钮 ---------- */

.plan-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.plan-actions button, .ghost-btn {
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.plan-actions button:hover, .ghost-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 动作按钮（导入/导出/清空/新增/恢复默认/保存当前）：与模板/方案的“可选项药丸”区分开 —— 方角、实底、深字 */
.action-btn,
.plan-actions .action-btn {
  border-radius: 7px;
  border: 1px solid transparent;
  background: var(--chip-bg);
  color: var(--text);
  font-weight: 500;
}
.action-btn:hover,
.plan-actions .action-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--chip-bg); }

/* 模板行：preset 是起点不是答案，放在行程标题下、用小字说明 */
.template-row {
  display: flex;
  align-items: flex-start;
  flex-wrap: nowrap;
  gap: 10px;
  margin: 8px 0 14px;
}

.template-label {
  flex: 0 0 auto;
  padding-top: 6px;   /* 与右侧药丸首行文字对齐 */
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* 标签右侧的内容列：药丸只在这一列里换行，不会跑到“格式/方案”字样正下方 */
.template-items { flex: 1 1 auto; min-width: 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }

.template-row #preset-buttons { display: inline-flex; flex-wrap: wrap; gap: 6px; align-items: center; }

.template-row #preset-buttons button,
.template-row #format-buttons button {
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.template-row #preset-buttons button:hover,
.template-row #format-buttons button:hover { border-color: var(--accent); color: var(--accent); }

.template-row #format-buttons button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* 用户保存的方案：整体是一颗药丸，标题和删除叉都在里面 */
.template-row #preset-buttons .saved-plan {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  transition: border-color 0.2s ease;
}
.template-row #preset-buttons .saved-plan:hover { border-color: var(--accent); }

.template-row #preset-buttons .saved-plan button {
  border: none;
  background: transparent;
  border-radius: 0;
  padding: 4px 3px 4px 11px;
}

.template-row #preset-buttons .saved-plan .saved-plan-del {
  padding: 4px 10px 4px 3px;
  font-size: 12px;
  color: var(--muted);
}
.template-row #preset-buttons .saved-plan .saved-plan-del:hover { color: var(--warn); }

.template-note {
  flex-basis: 100%;
  font-size: 11.5px;
  color: var(--muted);
  opacity: 0.85;
}

/* ---------- 区域概览图（SVG，相对位置 + 时距连线） ---------- */

.region-overview { margin-bottom: 22px; }

.region-map-svg {
  display: block;
  width: 100%; /* 占满整列，viewBox 按真实纵横比 */
}

.region-map-line {
  stroke: var(--line);
  stroke-width: 1.5;
}

.region-map-time {
  font-size: 9px;
  fill: var(--muted);
  text-anchor: middle;
  opacity: 0.85;
}

.region-map-node circle {
  fill: var(--muted);
  opacity: 0.55;
  transition: fill 0.25s ease, opacity 0.25s ease;
}

.region-map-node text {
  font-size: 11px;
  fill: var(--text);
}

.region-map-node.on circle {
  fill: var(--accent);
  opacity: 1;
}

.region-map-node.on text { font-weight: 600; }

/* 动线：按天着色的方向路线（arrival 暖灰，Day 1/2/3 用卡片主题色） */
.region-route {
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  opacity: 0.85;
}
.region-route--arrival { stroke: #a89c8e; }
.region-route--d1 { stroke: var(--c-dingshu); }
.region-route--d2 { stroke: var(--c-bamboo); }
.region-route--d3 { stroke: var(--c-night); }

.region-arrow { opacity: 0.9; }
.region-arrow--arrival { fill: #a89c8e; }
.region-arrow--d1 { fill: var(--c-dingshu); }
.region-arrow--d2 { fill: var(--c-bamboo); }
.region-arrow--d3 { fill: var(--c-night); }

.region-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 8px 0 0;
  font-size: 11.5px;
  color: var(--muted);
}

.region-legend-item { display: inline-flex; align-items: center; gap: 6px; }

.region-legend-item::before {
  content: "";
  width: 14px;
  height: 3px;
  border-radius: 2px;
  background: var(--line);
}
.region-legend--arrival::before { background: #a89c8e; }
.region-legend--d1::before { background: var(--c-dingshu); }
.region-legend--d2::before { background: var(--c-bamboo); }
.region-legend--d3::before { background: var(--c-night); }

/* 点/悬浮某天图例：单独看它的动线（点选是触屏主路径，悬停是桌面预览） */
.region-route, .region-arrow, .region-legend-item { transition: opacity 0.15s ease; }
.region-legend-item[data-hi-day] {
  cursor: pointer;
  padding: 3px 8px;
  margin: -3px 0;
  border-radius: 999px;
  border: 1px solid transparent;
}
.region-legend-item[data-hi-day]:hover { border-color: var(--line); }
/* 被点选“单独看”的那天：描边点亮，明确当前聚焦在哪 */
.region-overview[data-hi="arrival"] .region-legend--arrival,
.region-overview[data-hi="d1"] .region-legend--d1,
.region-overview[data-hi="d2"] .region-legend--d2,
.region-overview[data-hi="d3"] .region-legend--d3 { border-color: var(--accent); }

.region-legend-hint {
  text-align: center;
  margin: 7px 0 0;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.85;
}
.region-legend-hint[hidden] { display: none; }
.region-overview[data-hi] .region-route,
.region-overview[data-hi] .region-arrow { opacity: 0.12; }
.region-overview[data-hi] .region-legend-item { opacity: 0.4; }
.region-overview[data-hi="arrival"] .region-route--arrival,
.region-overview[data-hi="arrival"] .region-arrow--arrival,
.region-overview[data-hi="arrival"] .region-legend--arrival,
.region-overview[data-hi="d1"] .region-route--d1,
.region-overview[data-hi="d1"] .region-arrow--d1,
.region-overview[data-hi="d1"] .region-legend--d1,
.region-overview[data-hi="d2"] .region-route--d2,
.region-overview[data-hi="d2"] .region-arrow--d2,
.region-overview[data-hi="d2"] .region-legend--d2,
.region-overview[data-hi="d3"] .region-route--d3,
.region-overview[data-hi="d3"] .region-arrow--d3,
.region-overview[data-hi="d3"] .region-legend--d3 { opacity: 1; }

/* ---------- 路线图（普通 HTML，flex column） ---------- */

#route-graph { padding: 4px 0 0 4px; }

.graph-empty { font-size: 12.5px; color: var(--muted); }

.graph-node {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.graph-dot {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--card-accent, var(--accent));
  margin-left: 1px;
}

.graph-dot.imp-1 { width: 8px; height: 8px; margin-left: 3px; }
.graph-dot.imp-2 { width: 10px; height: 10px; margin-left: 2px; }
.graph-dot.imp-3 { width: 14px; height: 14px; margin-left: 0; }

.graph-node-text { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }

.graph-node-label { font-size: 14px; font-weight: 600; }

.graph-node-slot { font-size: 11px; color: var(--muted); }

.graph-edge {
  position: relative;
  margin-left: 7px;
}

.graph-edge-line {
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 2px;
  border-radius: 2px;
  background: var(--line);
}

.graph-edge-label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}

.graph-edge--heavy .graph-edge-line { background: var(--warn); opacity: 0.55; }
.graph-edge--heavy .graph-edge-label { color: var(--warn); }

/* 区域粗估段：虚线，与确认直连区分 */
.graph-edge--region .graph-edge-line {
  width: 0;
  background: none;
  border-left: 2px dashed var(--line);
}
.graph-edge--region.graph-edge--heavy .graph-edge-line { border-left-color: var(--warn); }

.graph-break {
  margin-left: 7px;
  border-left: 2px dashed var(--warn);
  padding: 10px 0 10px 16px;
  min-height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.graph-break strong {
  font-size: 12px;
  color: var(--warn);
  font-weight: 600;
}

.graph-break span {
  font-size: 11.5px;
  color: var(--muted);
  max-width: 30em;
}

.route-summary {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */

.site-footer {
  padding-bottom: 40px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- hint bar / toast ---------- */

.hint-bar {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(74px + env(safe-area-inset-bottom, 0px)); /* tab 栏之上 */
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  max-width: 616px;
  margin: 0 auto;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--accent);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.14);
  font-size: 13px;
}

.hint-bar[hidden] { display: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(138px + env(safe-area-inset-bottom, 0px)); /* tab 栏与 hint/snackbar 之上 */
  transform: translateX(-50%);
  z-index: 50;
  max-width: 86vw;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 12.5px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  transition: opacity 0.25s ease;
}

.toast[hidden] { display: none; }

.toast--warn { background: var(--warn); color: #fff; }

/* ---------- 简介视图 ---------- */

.view-intro { max-width: 34em; }

.intro-lead {
  margin: 4px 0 12px;
  font-size: 16.5px;
  line-height: 1.75;
}

.view-intro > p { font-size: 13.5px; color: var(--muted); }

.view-intro h2 {
  margin: 24px 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.intro-themes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.intro-themes li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  color: var(--muted);
  cursor: pointer; /* 可点：切主题 + 筛选卡片池并跳转 */
}

.intro-themes li:hover strong,
.intro-themes li:active strong { color: var(--accent); }

.intro-themes li::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--card-accent, var(--accent));
  transform: translateY(1px);
}

.intro-themes strong {
  flex: 0 0 auto;
  color: var(--text);
  font-weight: 600;
  margin-right: 2px;
}

.intro-steps {
  margin: 0;
  padding-left: 1.3em;
  font-size: 13.5px;
  display: grid;
  gap: 6px;
}

.intro-note {
  margin: 14px 0 24px;
  font-size: 12.5px;
  color: var(--muted);
}

.primary-btn {
  background: var(--accent);
  color: #fff;
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: opacity 0.2s ease;
}
.primary-btn:hover { opacity: 0.88; }
[data-theme="night"] .primary-btn { color: #181715; }

/* 简介里的「开始拼」和上面的步骤列表留出呼吸空间 */
.view-intro .primary-btn { margin-top: 22px; }

/* ---------- 底部 tab 栏（移动端） ---------- */

.tab-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 6px 10px calc(6px + env(safe-area-inset-bottom, 0px));
  transition: background-color 0.45s ease;
}

.tab-bar button {
  font-size: 12px;
  padding: 9px 2px;
  border-radius: 8px;
  color: var(--muted);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.tab-bar button[aria-pressed="true"] {
  color: var(--accent);
  font-weight: 600;
  background: var(--chip-bg);
}

/* ---------- snackbar（放卡后的撤销 / 继续选卡） ---------- */

.snackbar {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(74px + env(safe-area-inset-bottom, 0px));
  z-index: 48;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  max-width: 616px;
  margin: 0 auto;
  padding: 10px 12px 10px 14px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  font-size: 13px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.2);
}

.snackbar[hidden] { display: none; }

.snackbar--warn { background: var(--warn); color: #fff; }

.snackbar-actions { display: flex; gap: 6px; flex: 0 0 auto; }

.snackbar-actions button {
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid currentColor;
  color: inherit;
}

/* ---------- 拖拽 ---------- */

.drag-ghost {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 60;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--accent);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
  font-size: 13px;
  font-weight: 600;
  max-width: 60vw;
  overflow: hidden;
  /* 高度按卡片时长在网格里的占位伸展（liftDrag 里实测行高） */
  transition: height 0.28s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.drag-ghost-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.drag-ghost-dur {
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}

/* ---------- 保存方案的取名弹窗 ---------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.overlay[hidden] { display: none; }

.overlay-panel {
  background: var(--surface);
  border-radius: 14px;
  padding: 18px 18px 16px;
  width: 100%;
  max-width: 340px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.overlay-panel h3 { font-size: 15px; }

.overlay-panel input {
  font: inherit;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: inherit;
}

.overlay-panel input:focus {
  outline: 2px solid var(--accent);
  border-color: var(--accent);
}

.overlay-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.overlay-actions-spacer { flex: 1; }

/* 卡片编辑表单 */
.overlay-panel--form { max-width: 440px; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
  max-height: 62vh;
  overflow-y: auto;
}

.field { display: flex; flex-direction: column; gap: 4px; }
.field--full { grid-column: 1 / -1; }
.field > span { font-size: 11.5px; color: var(--muted); }

.field select,
.field input,
.field textarea {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: inherit;
}

.field select:focus,
.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  border-color: var(--accent);
}

.field textarea { resize: vertical; }

.field--check { flex-direction: row; align-items: center; gap: 6px; font-size: 13px; }
.field--check input { width: auto; }

/* 适合时段：沿用 .field 的“标签在上”竖排，勾选项自己横排一行 */
.cf-times-opts { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.cf-times-opts label { display: inline-flex; align-items: center; gap: 5px; font-size: 13px; }
.cf-times-opts input { width: auto; }

/* 卡片上的编辑入口 */
.card-top-right { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

.card-edit-btn {
  font: inherit;
  font-size: 11px;
  color: var(--muted);
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 8px;
  cursor: pointer;
}
.card-edit-btn:hover { border-color: var(--accent); color: var(--accent); }

/* 选卡后飞向底部悬置区的影子 */
.fly-ghost {
  position: fixed;
  z-index: 70;
  pointer-events: none;
  margin: 0;
  opacity: 0.9;
  transition: transform 0.38s cubic-bezier(0.2, 0.7, 0.3, 1), opacity 0.38s ease;
}

body.drag-active { cursor: grabbing; }

body.drag-active #day-canvas {
  outline: 1px dashed var(--line);
  outline-offset: 6px;
}

.drag-source { opacity: 0.35; }

/* ---------- 视图系统 ----------
   移动端：四个子页（简介 / 卡片池 / 行程拼配 / 路线图）由 body[data-view] 切换，
   底部 tab 栏导航；桌面端：tab 栏隐藏，三栏并排，简介由页头 tagline 承担。
   注意：必须排在组件规则之后，同等特异性下靠顺序覆盖。 */

@media (max-width: 1023px) {
  /* 菜单面板在移动端整幅铺开 */
  #view-pool {
    margin-left: -18px;
    margin-right: -18px;
    border-radius: 0;
    padding: 14px 18px 18px;
  }

  .view { display: none; }
  body[data-view="intro"] #view-intro,
  body[data-view="pool"] #view-pool,
  body[data-view="plan"] #view-plan,
  body[data-view="graph"] #view-graph {
    display: block;
    animation: view-fade 0.22s ease; /* display 切换时重放，形成轻微淡入 */
  }
}

@keyframes view-fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

@media (min-width: 1024px) {
  body { padding-bottom: 88px; }
  .container { max-width: 1520px; }
  .layout {
    display: grid;
    grid-template-columns: minmax(0, 10fr) minmax(0, 10fr) minmax(0, 8fr);
    gap: 44px;
    align-items: start;
  }
  #view-intro { display: none; } /* 简介内容桌面端已由页头 tagline 与各区说明覆盖 */
  .tab-bar { display: none; }
  /* 桌面列宽有限：感官菜单换行铺开，避免横向滚动被右缘截断 */
  .theme-menu { flex-wrap: wrap; overflow-x: visible; }
  .snackbar { display: none; } /* snackbar 是移动端机制，桌面走 toast */
  .pool-section, .plan-section, .graph-section { margin-bottom: 0; }
  .hint-bar { bottom: calc(12px + env(safe-area-inset-bottom, 0px)); }
  .toast { bottom: calc(76px + env(safe-area-inset-bottom, 0px)); }
}

/* 动效克制：尊重系统减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}