/* ─────────────────────────────────────────────
   旁观者 · 完整样式
   胶片暖黄风格 + 完整移动端适配
───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;600&display=swap');

/* ── 变量 ── */
:root {
  --cream: #f5f0e8;
  --warm: #e8dcc8;
  --brown: #8b6f47;
  --dark: #2c2416;
  --text: #3d2e1a;
  --muted: #9b8c7a;
  --tag-bg: #ede5d8;
  --card-bg: #faf6ef;
  --shadow: rgba(139,111,71,0.15);
  --panel-w: 460px;
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--cream);
  font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── HEADER ── */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--cream);
  padding: 20px 24px 18px;
  border-bottom: 1px solid var(--warm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.logo-area h1 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 5px;
  color: var(--dark);
}

.logo-area .tagline {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
  font-weight: 300;
  display: none;
}

.header-note {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
  text-align: right;
  line-height: 1.8;
}

/* ── 搜索 ── */
.search-wrap {
  padding: 28px 24px 20px;
}

.search-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 2px;
  margin-bottom: 14px;
  font-weight: 300;
}

.search-row {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--brown);
  padding-bottom: 8px;
  align-items: center;
  position: relative;
}

.search-row input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 20px;
  font-weight: 300;
  color: var(--dark);
  letter-spacing: 3px;
  padding: 4px 0;
  min-width: 0;
}

.search-row input::placeholder { color: var(--warm); font-size: 16px; }

.search-btn {
  background: var(--brown);
  color: var(--cream);
  border: none;
  padding: 8px 20px;
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.3s;
  white-space: nowrap;
  flex-shrink: 0;
}

.search-btn:hover { background: var(--dark); }
.search-btn:active { transform: scale(0.97); }

/* ── 心情筛选 ── */
.mood-filter {
  padding: 0 24px 20px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.mood-filter > span {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1px;
  margin-right: 2px;
  flex-shrink: 0;
}

.mood-tag {
  background: transparent;
  border: 1px solid var(--brown);
  color: var(--brown);
  padding: 5px 14px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.3s;
}

.mood-tag:hover, .mood-tag.active {
  background: var(--brown);
  color: var(--cream);
}

/* ── 分割线 ── */
.section-divider {
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.section-divider .line { flex: 1; height: 1px; background: var(--warm); }
.section-divider .label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
  white-space: nowrap;
}

/* ── 结果头 ── */
.result-header {
  padding: 0 24px 20px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 2px;
  display: none;
  line-height: 1.8;
}

.result-header strong {
  color: var(--dark);
  font-size: 16px;
  letter-spacing: 3px;
}

.loading-dot {
  color: var(--brown);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── 卡片网格 ── */
.cards-area {
  padding: 0 24px 100px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.city-card {
  background: var(--card-bg);
  border: 1px solid var(--warm);
  padding: 22px;
  cursor: pointer;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}

.city-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--brown);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s;
}

.city-card:hover, .city-card:focus {
  box-shadow: 0 6px 28px var(--shadow);
  transform: translateY(-2px);
}

.city-card:hover::before, .city-card:focus::before { transform: scaleY(1); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.card-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: 3px;
}

.card-dist {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
  margin-top: 3px;
}

.card-weather-wrap { text-align: right; }
.card-weather { font-size: 20px; }
.card-temp {
  font-size: 13px;
  color: var(--text);
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.card-weather-desc {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
  margin-top: 2px;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.card-tag {
  background: var(--tag-bg);
  color: var(--brown);
  padding: 3px 9px;
  font-size: 10px;
  letter-spacing: 1px;
}

.card-desc {
  font-size: 12px;
  line-height: 1.9;
  color: var(--muted);
  font-weight: 300;
  letter-spacing: 0.3px;
}

.card-footer {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--warm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-mood {
  font-size: 10px;
  color: var(--brown);
  letter-spacing: 1px;
}

.card-cta {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
  opacity: 0;
  transition: opacity 0.3s;
}

.city-card:hover .card-cta { opacity: 1; }

/* ── 骨架屏 ── */
@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton {
  pointer-events: none;
}

.sk-name, .sk-weather, .sk-tag, .sk-desc {
  background: linear-gradient(90deg, var(--warm) 25%, var(--cream) 50%, var(--warm) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 2px;
}

.sk-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 14px;
}

.sk-name { width: 80px; height: 24px; }
.sk-weather { width: 50px; height: 24px; }
.sk-tags { display: flex; gap: 6px; margin-bottom: 14px; }
.sk-tag { width: 50px; height: 18px; }
.sk-desc { height: 12px; margin-bottom: 8px; }
.sk-desc.short { width: 70%; }

/* ── 空状态 ── */
.empty-state {
  padding: 60px 24px;
  text-align: center;
  display: none;
}

.empty-state .big-char {
  font-size: 48px;
  color: var(--warm);
  margin-bottom: 18px;
}

.empty-state p {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 2px;
  line-height: 2.2;
  font-weight: 300;
}

/* ── 引导页 ── */
.landing {
  padding: 40px 24px;
  max-width: 100%;
}

.landing p {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 2px;
  line-height: 2.4;
  font-weight: 300;
}

.landing .quote {
  margin-top: 28px;
  padding-left: 16px;
  border-left: 2px solid var(--brown);
  font-size: 12px;
  color: var(--brown);
  letter-spacing: 1.5px;
  line-height: 2.2;
  font-style: italic;
}

/* ── 遮罩 ── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(44,36,22,0.4);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
}

.overlay.show { opacity: 1; pointer-events: all; }

/* ── 侧边栏（桌面端） ── */
.side-panel {
  position: fixed;
  top: 0; right: -var(--panel-w);
  width: var(--panel-w);
  height: 100vh;
  background: var(--card-bg);
  border-left: 1px solid var(--warm);
  padding: 40px 28px;
  overflow-y: auto;
  transition: right 0.4s cubic-bezier(.4,0,.2,1);
  z-index: 100;
  box-shadow: -6px 0 32px var(--shadow);
}

.side-panel::-webkit-scrollbar { width: 3px; }
.side-panel::-webkit-scrollbar-track { background: var(--cream); }
.side-panel::-webkit-scrollbar-thumb { background: var(--warm); }

.panel-close {
  position: absolute;
  top: 16px; right: 18px;
  background: none;
  border: none;
  font-size: 18px;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.2s;
}

.panel-close:hover { color: var(--dark); }

.panel-city-name {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 5px;
  color: var(--dark);
  margin-bottom: 6px;
  padding-right: 40px;
}

.panel-city-sub {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 1.5px;
  margin-bottom: 28px;
  line-height: 2;
}

.panel-weather-chip {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--brown);
  padding: 2px 10px;
  margin-left: 8px;
  font-size: 11px;
  letter-spacing: 0.5px;
}

.panel-section { margin-bottom: 24px; }

.panel-section-title {
  font-size: 10px;
  color: var(--brown);
  letter-spacing: 3px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.panel-text {
  font-size: 12px;
  color: var(--muted);
  line-height: 2.2;
  font-weight: 300;
  letter-spacing: 0.3px;
}

.panel-list { list-style: none; }
.panel-list li {
  font-size: 12px;
  color: var(--muted);
  line-height: 2.2;
  letter-spacing: 0.3px;
  font-weight: 300;
  padding-left: 12px;
  position: relative;
}

.panel-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--brown);
}

.panel-quote {
  background: var(--cream);
  border-left: 2px solid var(--brown);
  padding: 14px 16px;
  font-size: 12px;
  color: var(--brown);
  line-height: 1.9;
  letter-spacing: 1px;
  font-style: italic;
  margin-top: 20px;
}

.panel-divider {
  height: 1px;
  background: var(--warm);
  margin: 20px 0;
}

/* ── 无结果 ── */
.no-result {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 2px;
  padding: 24px 0;
  text-align: center;
}

/* ─────────────────────────────────────────────
   移动端适配（< 768px）
───────────────────────────────────────────── */

@media (max-width: 767px) {
  :root { --panel-w: 100vw; }

  /* Header 压缩 */
  header { padding: 14px 16px 12px; }
  .logo-area { gap: 10px; }
  .logo-area h1 { font-size: 17px; letter-spacing: 4px; }
  .logo-area .tagline { display: block; font-size: 10px; }
  .header-note { display: none; }

  /* 搜索 */
  .search-wrap { padding: 18px 16px 14px; }
  .search-label { font-size: 12px; margin-bottom: 10px; }
  .search-row input { font-size: 18px; letter-spacing: 2px; }
  .search-btn { padding: 7px 14px; font-size: 12px; letter-spacing: 1px; }

  /* 心情标签 */
  .mood-filter {
    padding: 0 16px 14px;
    gap: 6px;
  }

  .mood-filter > span { font-size: 10px; }
  .mood-tag { padding: 4px 10px; font-size: 10px; }

  /* 分割线 & 结果头 */
  .section-divider { padding: 0 16px; margin-bottom: 14px; }
  .result-header {
    padding: 0 16px 14px;
    font-size: 11px;
  }

  /* 卡片 */
  .cards-area {
    padding: 0 16px 90px;
    gap: 14px;
  }

  .city-card { padding: 18px; }

  .card-name { font-size: 18px; letter-spacing: 2px; }
  .card-desc { font-size: 12px; }

  /* 引导页 */
  .landing { padding: 28px 16px; }
  .landing p { font-size: 12px; }
  .landing .quote { font-size: 11px; }

  /* 空状态 */
  .empty-state { padding: 40px 16px; }

  /* ── 移动端底部面板 ── */
  .side-panel {
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    height: 85vh;
    border-radius: 20px 20px 0 0;
    border-left: none;
    border-top: 1px solid var(--warm);
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(.4,0,.2,1);
    box-shadow: 0 -8px 40px rgba(44,36,22,0.2);
    padding: 32px 20px 40px;
  }

  .side-panel.open {
    transform: translateY(0);
  }

  /* 移动端拖拽条 */
  .side-panel::before {
    content: '';
    display: block;
    width: 40px;
    height: 4px;
    background: var(--warm);
    border-radius: 2px;
    margin: -12px auto 20px;
  }

  .panel-city-name { font-size: 24px; letter-spacing: 3px; }
  .panel-text { font-size: 13px; }
  .panel-list li { font-size: 13px; }
  .panel-quote { font-size: 13px; }

  /* 移动端遮罩 */
  .overlay { background: rgba(44,36,22,0.5); }

  /* 心情筛选区在移动端固定在底部 */
  .mood-filter {
    position: sticky;
    top: var(--header-h);
    z-index: 40;
    background: var(--cream);
    border-bottom: 1px solid var(--warm);
    padding: 10px 16px;
  }
}

/* ─────────────────────────────────────────────
   平板适配（768px ~ 1024px）
───────────────────────────────────────────── */
@media (min-width: 768px) and (max-width: 1024px) {
  .cards-area {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ─────────────────────────────────────────────
   桌面适配（> 1024px）
───────────────────────────────────────────── */
@media (min-width: 1025px) {
  .cards-area {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

/* ─────────────────────────────────────────────
   超宽屏
───────────────────────────────────────────── */
@media (min-width: 1400px) {
  .search-wrap { max-width: 700px; }
  .cards-area { max-width: 1200px; }
}

/* ─────────────────────────────────────────────
   滚动条
───────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { background: var(--warm); }

/* ─────────────────────────────────────────────
   辅助类
───────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── 触摸反馈 ── */
@media (hover: none) {
  .city-card:hover {
    transform: none;
    box-shadow: none;
  }

  .city-card:hover::before { transform: scaleY(1); }
  .city-card:active {
    background: #f0ebe0;
    transform: scale(0.98);
  }
}