:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #059669;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

.app-header {
  text-align: center;
  margin-bottom: 20px;
}

.app-header h1 {
  margin: 0;
  font-size: 26px;
}

.app-header .subtitle {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

/* 卡片通用 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* 输入区域 */
.input-card {
  padding: 20px;
  margin-bottom: 24px;
}

.input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  align-items: end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

.field input,
.field select {
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.field-button {
  justify-content: flex-end;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 18px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-outline {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: #f9fafb;
  border-color: #d1d5db;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  padding: 0 12px;
  height: 32px;
  font-size: 13px;
  font-weight: 500;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-icon {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 500;
}

.btn-icon:hover {
  background: #f9fafb;
}

/* 显示区域 */
.display-area {
  margin-top: 8px;
}

.display-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.display-toolbar h2 {
  margin: 0;
  font-size: 20px;
}

.count-badge {
  display: inline-block;
  min-width: 24px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  text-align: center;
}

.toolbar-actions {
  display: flex;
  gap: 10px;
}

/* 面板列表 */
.panel-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* 每个日期面板 */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  cursor: pointer;
  background: #fafbfc;
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.panel-header:hover {
  background: #f3f4f6;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
}

.panel-title .date {
  color: var(--text);
}

.panel-title .month {
  font-size: 12px;
  color: var(--text-muted);
}

.panel-title .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.panel-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-tools .btn {
  pointer-events: auto;
}

.caret {
  display: inline-block;
  width: 12px;
  text-align: center;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.panel.collapsed .caret {
  transform: rotate(-90deg);
}

.panel-body {
  padding: 0;
}

.panel.collapsed .panel-body {
  display: none;
}

/* 记录表 */
.records-table {
  width: 100%;
  border-collapse: collapse;
}

.records-table th,
.records-table td {
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.records-table th {
  background: #f9fafb;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 13px;
}

.records-table tr:last-child td {
  border-bottom: none;
}

.records-table td .action-chip {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.chip-long { background: #fee2e2; color: #b91c1c; }
.chip-short { background: #dcfce7; color: #15803d; }
.chip-reduce-long { background: #fef3c7; color: #b45309; }
.chip-reduce-short { background: #fce7f3; color: #be185d; }

.empty-hint {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #111827;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  max-width: 80%;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 560px) {
  .input-grid {
    grid-template-columns: 1fr 1fr;
  }
  .field-button .btn {
    width: 100%;
  }
  .toolbar-actions {
    width: 100%;
    justify-content: flex-end;
  }
}