/* ===== CSS Variables ===== */
:root {
  --page-bg: #f8f5f0;
  --page-bg-deep: #f0ebe3;
  --panel: rgba(255, 253, 250, 0.96);
  --panel-strong: rgba(255, 251, 246, 0.98);
  --border: rgba(140, 110, 80, 0.15);
  --accent: #c45a4a;
  --accent-strong: #9e4435;
  --accent-soft: rgba(196, 90, 74, 0.1);
  --gold-soft: rgba(200, 165, 100, 0.15);
  --ink: #332925;
  --muted: #6b5d54;
  --success: #4a7c59;
  --danger: #c45a4a;
  --info: #5a7c9e;
  --shadow-sm: 0 4px 12px rgba(80, 60, 40, 0.06);
  --shadow: 0 12px 32px rgba(80, 60, 40, 0.08);
  --shadow-lg: 0 20px 48px rgba(80, 60, 40, 0.12);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --page-bg: #1e1a18;
    --page-bg-deep: #151210;
    --panel: rgba(40, 35, 32, 0.96);
    --panel-strong: rgba(48, 42, 38, 0.98);
    --border: rgba(160, 130, 100, 0.18);
    --accent: #d4735a;
    --accent-strong: #e8956a;
    --accent-soft: rgba(212, 115, 90, 0.15);
    --gold-soft: rgba(200, 165, 100, 0.12);
    --ink: #ede5dc;
    --muted: #a89888;
    --success: #6ba87a;
    --danger: #d4735a;
    --info: #7a9ab8;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.45);
  }
}

/* ===== Reset & Base ===== */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(ellipse at top left, rgba(200, 165, 100, 0.08), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(196, 90, 74, 0.05), transparent 50%),
    linear-gradient(180deg, var(--page-bg) 0%, var(--page-bg-deep) 100%);
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

button:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Aurora Background ===== */
.aurora {
  position: fixed;
  width: 40rem;
  height: 40rem;
  border-radius: 999px;
  filter: blur(100px);
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
  animation: float 25s ease-in-out infinite;
}

.aurora-a {
  top: -15rem;
  right: -10rem;
  background: rgba(200, 165, 100, 0.25);
  animation-delay: 0s;
}

.aurora-b {
  bottom: -18rem;
  left: -12rem;
  background: rgba(196, 90, 74, 0.12);
  animation-delay: -12s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.03); }
}

/* ===== Layout ===== */
.shell {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--ink) 0%, var(--accent-strong) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-copy {
  max-width: 40rem;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Today Chip */
.today-chip {
  min-width: 220px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #5a3a32, #8b4a3a);
  color: #fff7ef;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.today-chip::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.1), transparent 60%);
  pointer-events: none;
}

.today-chip span,
.today-chip small {
  display: block;
  opacity: 0.85;
  position: relative;
  font-size: 0.85rem;
}

.today-chip strong {
  display: block;
  margin: 6px 0;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  position: relative;
  font-variant-numeric: tabular-nums;
}

.time-source {
  margin-top: 6px;
  font-size: 0.72rem;
  opacity: 0.7;
  position: relative;
}

/* Main Layout */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(300px, 0.9fr);
  gap: 20px;
  align-items: start;
}

/* Panel Glass */
.panel-glass {
  background: var(--panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.panel-glass:hover {
  box-shadow: var(--shadow);
}

.calendar-card,
.detail-card,
.split-card,
.info-card,
.highlight-card {
  border-radius: var(--radius-xl);
}

.calendar-card {
  padding: 20px;
}

/* Detail Stack - Sticky */
.detail-stack {
  display: grid;
  gap: 14px;
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.detail-stack::-webkit-scrollbar {
  width: 6px;
}

.detail-stack::-webkit-scrollbar-track {
  background: transparent;
}

.detail-stack::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.detail-stack::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.toolbar-right label {
  display: grid;
  gap: 4px;
  min-width: 100px;
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}

.toolbar-right select,
.ghost-btn,
.nav-btn {
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--ink);
  border-radius: var(--radius);
  font: inherit;
  font-weight: 500;
  transition: all var(--transition);
  min-height: 44px;
}

.toolbar-right select {
  width: 100%;
  padding: 10px 12px;
  cursor: pointer;
}

.toolbar-right select:hover,
.ghost-btn:hover,
.nav-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.ghost-btn,
.nav-btn {
  padding: 10px 16px;
  cursor: pointer;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-btn {
  font-size: 1.25rem;
  font-weight: 600;
}

.ghost-btn {
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border-color: rgba(196, 90, 74, 0.2);
  color: var(--accent-strong);
}

.ghost-btn:hover {
  background: linear-gradient(135deg, rgba(196, 90, 74, 0.15), rgba(196, 90, 74, 0.08));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(196, 90, 74, 0.15);
}

/* ===== Month Heading ===== */
.month-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin: 20px 0 16px;
}

.month-heading h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.month-heading p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.month-stat {
  min-width: 100px;
  padding: 12px 16px;
  text-align: center;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px solid rgba(196, 90, 74, 0.12);
}

.month-stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 700;
}

.month-stat span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== Calendar Grid ===== */
.weekday-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.weekday-row span {
  text-align: center;
  padding: 6px 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

/* Day Card */
.day-card {
  min-height: 90px;
  padding: 10px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel-strong);
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.day-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}

.day-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(61, 43, 31, 0.08);
}

.day-card:hover::before {
  background: linear-gradient(90deg, var(--accent), transparent);
}

.day-card.is-other {
  opacity: 0.4;
}

.day-card.is-selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 4px 12px rgba(184, 84, 72, 0.12);
}

.day-card.is-selected::before {
  background: var(--accent);
}

.day-card.is-today {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-soft), var(--panel-strong));
  box-shadow: 0 4px 16px rgba(184, 84, 72, 0.15);
}

.day-card.is-today::before {
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  height: 3px;
}

.day-card.is-today .solar-number {
  color: var(--accent-strong);
  font-weight: 800;
}

.day-card.is-today::after {
  content: '今';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  font-size: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.day-top {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 4px;
}

.solar-number {
  font-size: 1.25rem;
  line-height: 1;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Tags */
.tag-dot {
  flex: 0 0 auto;
  min-width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  display: inline-grid;
  place-items: center;
  font-size: 10px;
  font-weight: 500;
  transition: all var(--transition);
}

.tag-dot.festival {
  background: linear-gradient(135deg, rgba(196, 90, 74, 0.12), rgba(196, 90, 74, 0.06));
  color: var(--accent-strong);
  font-weight: 600;
}

.tag-dot.jieqi {
  background: linear-gradient(135deg, rgba(74, 124, 89, 0.12), rgba(74, 124, 89, 0.06));
  color: var(--success);
  font-weight: 600;
}

.day-bottom {
  display: grid;
  gap: 4px;
}

.lunar-label {
  min-height: 2em;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.2;
  word-break: break-word;
}

.day-summary {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.mini-chip {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  font-size: 9px;
  line-height: 1.2;
  font-weight: 500;
  transition: all var(--transition);
}

.mini-chip.festival {
  background: linear-gradient(135deg, rgba(196, 90, 74, 0.1), rgba(196, 90, 74, 0.05));
  color: var(--accent-strong);
}

.mini-chip.jieqi {
  background: linear-gradient(135deg, rgba(74, 124, 89, 0.1), rgba(74, 124, 89, 0.05));
  color: var(--success);
}

/* ===== Detail Cards ===== */
.detail-card,
.split-card,
.info-card,
.highlight-card {
  padding: 18px;
}

.detail-kicker {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
}

.detail-card h3 {
  margin: 6px 0 0;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.3;
}

.split-card h4,
.info-card h4,
.highlight-card h4 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.detail-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Pills */
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 14px;
}

.detail-pill {
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.detail-pill.festival {
  background: linear-gradient(135deg, rgba(196, 90, 74, 0.08), rgba(196, 90, 74, 0.04));
  color: var(--accent-strong);
  border-color: rgba(196, 90, 74, 0.15);
}

.detail-pill.jieqi {
  background: linear-gradient(135deg, rgba(74, 124, 89, 0.08), rgba(74, 124, 89, 0.04));
  color: var(--success);
  border-color: rgba(74, 124, 89, 0.15);
}

.detail-pill.other {
  background: var(--gold-soft);
  color: var(--ink);
}

/* Detail Grid */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 10px;
}

.detail-label {
  display: block;
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
}

.detail-grid strong {
  font-size: 0.85rem;
}

/* Split Card */
.split-card {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.chip-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.chip-wall span {
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition);
}

.chip-wall.yi span {
  background: linear-gradient(135deg, rgba(74, 124, 89, 0.08), rgba(74, 124, 89, 0.04));
  color: var(--success);
  border: 1px solid rgba(74, 124, 89, 0.15);
}

.chip-wall.ji span {
  background: linear-gradient(135deg, rgba(196, 90, 74, 0.08), rgba(196, 90, 74, 0.04));
  color: var(--danger);
  border: 1px solid rgba(196, 90, 74, 0.15);
}

.empty-chip {
  color: var(--muted) !important;
  background: rgba(116, 103, 95, 0.08) !important;
  border: 1px dashed var(--border) !important;
}

/* Info Card */
.info-card dl {
  margin: 12px 0 0;
  display: grid;
  gap: 12px;
}

.info-card dt {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
}

.info-card dd {
  margin: 0;
  line-height: 1.5;
  font-size: 0.85rem;
}

/* Highlight Card */
.highlight-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.highlight-head span {
  color: var(--muted);
  font-size: 0.85rem;
}

.highlight-list {
  margin-top: 12px;
  display: grid;
  gap: 8px;
  max-height: 280px;
  overflow: auto;
  padding-right: 4px;
}

.highlight-item {
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}

.highlight-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(61, 43, 31, 0.06);
}

.highlight-item strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
  font-size: 0.88rem;
}

.highlight-item span {
  color: var(--muted);
  font-size: 0.8rem;
}

/* ===== Skeleton Loading ===== */
.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, rgba(180, 150, 120, 0.1) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.day-card.skeleton {
  min-height: 90px;
}

/* ===== Festival Modal ===== */
.festival-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.festival-modal.is-active {
  opacity: 1;
  pointer-events: auto;
}

.festival-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(45, 36, 31, 0.6);
  backdrop-filter: blur(8px);
}

.festival-modal-content {
  position: relative;
  max-width: 480px;
  width: calc(100% - 32px);
  max-height: calc(100vh - 64px);
  padding: 24px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.festival-modal.is-active .festival-modal-content {
  transform: translateY(0) scale(1);
}

.festival-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--accent-soft);
  border-radius: 50%;
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.festival-modal-close:hover {
  background: var(--accent);
  color: white;
  transform: rotate(90deg);
}

.festival-modal-title {
  margin: 0 0 14px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-strong);
  padding-right: 40px;
}

.festival-modal-text {
  margin: 0;
  line-height: 1.7;
  color: var(--ink);
  font-size: 0.92rem;
}

/* Clickable Elements */
.festival-clickable {
  cursor: pointer;
  transition: all var(--transition);
}

.festival-clickable:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(196, 90, 74, 0.2);
  filter: brightness(0.95);
}

/* ===== Responsive ===== */
@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .detail-stack {
    position: static;
    max-height: none;
    grid-template-columns: repeat(2, 1fr);
  }

  .detail-card,
  .highlight-card {
    grid-column: span 2;
  }
}

@media (max-width: 760px) {
  .shell {
    padding: 16px 12px 24px;
  }

  .hero {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 16px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-copy {
    font-size: 0.88rem;
  }

  .today-chip {
    min-width: 0;
  }

  .calendar-card,
  .detail-card,
  .split-card,
  .info-card,
  .highlight-card {
    border-radius: var(--radius-lg);
    padding: 14px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }

  .toolbar-right {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .month-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .month-stat {
    width: 100%;
  }

  .weekday-row {
    gap: 3px;
    font-size: 0.72rem;
  }

  .calendar-grid {
    gap: 3px;
  }

  .day-card {
    min-height: 70px;
    padding: 6px 4px;
    border-radius: var(--radius-sm);
  }

  .solar-number {
    font-size: 1rem;
  }

  .tag-dot {
    min-width: 18px;
    height: 18px;
    font-size: 8px;
  }

  .lunar-label {
    font-size: 0.65rem;
    min-height: 1.8em;
  }

  .mini-chip {
    display: none;
  }

  .detail-stack {
    grid-template-columns: 1fr;
  }

  .detail-card,
  .highlight-card {
    grid-column: auto;
  }

  .detail-grid,
  .split-card {
    grid-template-columns: 1fr;
  }

  .highlight-list {
    max-height: none;
  }
}

/* Touch Targets */
@media (pointer: coarse) {
  .day-card {
    min-height: 80px;
  }

  .nav-btn,
  .ghost-btn {
    min-height: 48px;
    min-width: 48px;
  }
}