:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #7a8499;
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --border: #e5eaf3;
  --today: #fff1d6;
  --weekend: #fff7f7;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.12);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 160ms;
  --duration-normal: 260ms;
  --duration-slow: 420ms;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.24), transparent 36%),
    linear-gradient(135deg, #f9fbff 0%, var(--bg) 100%);
}

.app {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.calendar-card {
  width: min(980px, 100%);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px;
  animation: cardEnter var(--duration-slow) var(--ease-out) both;
  will-change: transform, opacity;
}

.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.title-wrap {
  text-align: center;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 48px);
  letter-spacing: 0.04em;
}

.today-text {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.nav-btn,
.action-btn {
  border: none;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    background var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease,
    filter var(--duration-fast) ease;
  will-change: transform;
}

.nav-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  font-size: 42px;
  line-height: 1;
  color: #fff;
  background: var(--primary);
  box-shadow: 0 10px 20px rgba(59, 130, 246, 0.28);
}

.nav-btn:hover,
.action-btn:hover {
  transform: translateY(-2px) scale(1.02);
  filter: brightness(1.03);
}

.nav-btn:active,
.action-btn:active {
  transform: translateY(0) scale(0.97);
}

.toolbar {
  margin: 24px 0 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 11px 18px;
  border-radius: 999px;
  color: #fff;
  background: var(--primary-dark);
  font-weight: 700;
}

.month-picker {
  color: var(--muted);
  font-size: 15px;
}

.month-picker input {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 9px 11px;
  color: var(--text);
  background: #fff;
}

.marker-panel {
  margin: 0 0 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(248, 250, 252, 0.86);
  animation: fadeUp 520ms var(--ease-out) 80ms both;
}

.marker-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.marker-head h2 {
  margin: 0;
  font-size: 18px;
}

.marker-head p {
  margin: 5px 0 14px;
  color: var(--muted);
  font-size: 13px;
}

.reset-btn {
  flex: 0 0 auto;
  border: 1px solid #fecaca;
  border-radius: 999px;
  padding: 8px 12px;
  color: #dc2626;
  background: #fff1f2;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.reset-btn:active {
  transform: scale(0.98);
}

.marker-form {
  display: grid;
  grid-template-columns: 1.1fr 0.8fr 0.8fr minmax(220px, 2fr) auto auto;
  gap: 10px;
  align-items: start;
}

.marker-form input[type="text"],
.marker-form select {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 11px;
  color: var(--text);
  background: #fff;
  transition:
    border-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease,
    transform var(--duration-fast) var(--ease-smooth);
}

.marker-form input[type="text"]:focus,
.marker-form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
}

.marker-month[hidden] {
  display: none;
}

.marker-options {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  max-height: 132px;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
}

.marker-option {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 9px;
  border: 1px solid #dbe4f0;
  border-radius: 999px;
  color: var(--text);
  background: #f8fafc;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    color var(--duration-fast) ease,
    background var(--duration-fast) ease,
    border-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

.marker-option:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(37, 99, 235, 0.12);
}

.marker-option:has(input:checked) {
  color: #fff;
  border-color: var(--primary-dark);
  background: var(--primary-dark);
}

.marker-option input {
  accent-color: var(--primary-dark);
}

.marker-bulk-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.marker-bulk-actions button {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--primary-dark);
  background: #fff;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    background var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

.marker-bulk-actions button:hover {
  transform: translateY(-1px);
  background: #eff6ff;
  box-shadow: 0 6px 14px rgba(37, 99, 235, 0.12);
}

.marker-form input[type="color"] {
  width: 46px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
  background: #fff;
}

.marker-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.marker-empty {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.marker-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 13px;
  animation: chipIn 260ms var(--ease-out) both;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    box-shadow var(--duration-fast) ease;
}

.marker-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(23, 32, 51, 0.08);
}

.marker-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.marker-item small {
  color: var(--muted);
}

.marker-item button {
  border: none;
  border-radius: 999px;
  padding: 4px 8px;
  color: #ef4444;
  background: #fee2e2;
  cursor: pointer;
  font-weight: 700;
}

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

.weekdays {
  margin-bottom: 10px;
  color: var(--muted);
  font-weight: 800;
  text-align: center;
}

.weekdays span {
  padding: 10px 0;
}

.calendar-grid {
  gap: 10px;
}

.day {
  aspect-ratio: 1 / 1;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  position: relative;
  text-align: center;
  overflow: hidden;
  animation: dayEnter 360ms var(--ease-out) both;
  transition:
    transform var(--duration-normal) var(--ease-smooth),
    box-shadow var(--duration-normal) ease,
    border-color var(--duration-normal) ease,
    background var(--duration-normal) ease,
    color var(--duration-normal) ease;
  will-change: transform;
}

.day::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.72), transparent 62%);
  pointer-events: none;
}

.day:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(23, 32, 51, 0.12);
}

.day-number {
  position: relative;
  z-index: 1;
  font-size: 24px;
}

.day.other-month {
  color: #bac2d0;
  background: #f8fafc;
}

.day.custom-marked:not(.other-month) {
  color: #fff;
  border-color: var(--marker-color);
  background: var(--marker-color);
  box-shadow: 0 10px 22px color-mix(in srgb, var(--marker-color) 28%, transparent);
}

.day.custom-marked.other-month {
  color: #fff;
  border-color: color-mix(in srgb, var(--marker-color) 55%, #e5eaf3);
  background: color-mix(in srgb, var(--marker-color) 45%, #f8fafc);
}

.day.today {
  border-color: #f59e0b;
  background: var(--today);
  color: #92400e;
  box-shadow: inset 0 0 0 2px rgba(245, 158, 11, 0.25);
}

.day.custom-marked.today {
  border-color: #f59e0b;
  box-shadow: inset 0 0 0 2px rgba(245, 158, 11, 0.65), 0 10px 22px color-mix(in srgb, var(--marker-color) 28%, transparent);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 99;
}
.modal.show {
  display: flex;
}

.modal.show .modal-backdrop {
  animation: backdropIn var(--duration-normal) ease both;
}


.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.42);
  backdrop-filter: blur(6px);
}

.detail-card {
  position: relative;
  width: min(560px, 100%);
  max-height: min(720px, 88vh);
  overflow: auto;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.28);
  padding: 28px;
  animation: popIn var(--duration-normal) var(--ease-out) both;
  will-change: transform, opacity;
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 50%;
  color: #475569;
  background: #f1f5f9;
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    background var(--duration-fast) ease,
    color var(--duration-fast) ease;
}

.close-btn:hover {
  transform: rotate(8deg) scale(1.05);
  color: #0f172a;
  background: #e2e8f0;
}

.close-btn:active {
  transform: scale(0.94);
}

.detail-badge {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  color: #1d4ed8;
  background: #dbeafe;
  font-weight: 800;
  font-size: 13px;
}

.detail-card h2 {
  margin: 0;
  font-size: clamp(28px, 6vw, 42px);
}

.detail-meta {
  margin-top: 8px;
  color: var(--muted);
  font-weight: 700;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

.tag {
  padding: 7px 11px;
  border-radius: 999px;
  color: #0f766e;
  background: #ccfbf1;
  font-size: 13px;
  font-weight: 800;
  animation: chipIn 260ms var(--ease-out) both;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    filter var(--duration-fast) ease;
}

.tag:hover {
  transform: translateY(-1px);
  filter: brightness(1.02);
}

.detail-section h3 {
  margin: 0 0 12px;
}

.detail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.detail-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #f8fafc;
  animation: fadeUp 320ms var(--ease-out) both;
  transition:
    transform var(--duration-fast) var(--ease-smooth),
    border-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

.detail-list li:hover {
  transform: translateY(-1px);
  border-color: #d5e2f2;
  box-shadow: 0 8px 18px rgba(23, 32, 51, 0.07);
}

.detail-list strong {
  white-space: nowrap;
}

.detail-list span {
  color: #475569;
  text-align: right;
}

@keyframes cardEnter {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

@keyframes chipIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes dayEnter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes backdropIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@media (max-width: 640px) {
  .app {
    padding: 10px;
    align-items: flex-start;
  }

  .calendar-card {
    border-radius: 20px;
    padding: 18px;
  }

  .marker-form {
    grid-template-columns: 1fr 1fr;
  }

  .marker-form input[type="text"],
  .marker-month,
  .marker-options,
  .marker-bulk-actions,
  .marker-form .action-btn {
    grid-column: 1 / -1;
  }

  .marker-bulk-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .marker-bulk-actions button {
    flex: 1;
  }

  .marker-form input[type="color"] {
    width: 100%;
  }

  .nav-btn {
    width: 44px;
    height: 44px;
    font-size: 34px;
  }

  .calendar-grid {
    gap: 6px;
  }

  .day {
    aspect-ratio: 1 / 1;
    min-height: 0;
    border-radius: 12px;
    padding: 6px;
    font-size: 16px;
  }

  .day-number {
    font-size: 18px;
  }

  .detail-card {
    padding: 22px;
    border-radius: 20px;
  }

  .detail-list li {
    flex-direction: column;
    gap: 4px;
  }

  .detail-list span {
    text-align: left;
  }

  /* 今天只用黄色底色表示，不在总览显示文字。 */
}