:root {
  --primary-color: #2c5e50;
  --primary-hover: #1f4339;
  --primary-light: #e8f3ef;
  --secondary-color: #d97736;
  --accent-color: #5c7f67;
  --bg-light: #f7f9f8;
  --text-dark: #2d3748;
  --text-muted: #718096;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
  --border-radius: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans TC", sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

/* 頂部導航與橫幅 */
.navbar-brand {
  font-weight: 700;
  color: var(--primary-color) !important;
  letter-spacing: 0.5px;
}

.hero-banner {
  background: linear-gradient(135deg, #2c5e50 0%, #1f4339 100%);
  color: #ffffff;
  padding: 40px 20px;
  border-radius: var(--border-radius);
  margin-bottom: 30px;
  box-shadow: 0 12px 30px rgba(44, 94, 80, 0.2);
}

.hero-banner h1 {
  font-weight: 800;
  font-size: 2rem;
  margin-bottom: 10px;
}

.hero-banner p {
  color: #d1e7dd;
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* 主要區塊卡片 */
.booking-card {
  background: #ffffff;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(0, 0, 0, 0.05);
  padding: 24px;
  margin-bottom: 24px;
  transition: all 0.2s ease-in-out;
}

.step-header {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.step-badge {
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  flex-shrink: 0;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0;
}

/* 日期快捷列 */
.quick-date-container {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 15px;
  -webkit-overflow-scrolling: touch;
}

.quick-date-btn {
  flex: 0 0 auto;
  border: 1.5px solid #e2e8f0;
  background: #ffffff;
  padding: 10px 16px;
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  min-width: 85px;
}

.quick-date-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
}

.quick-date-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(44, 94, 80, 0.25);
}

.quick-date-btn .weekday {
  font-size: 0.85rem;
  font-weight: 500;
  display: block;
}

.quick-date-btn .day {
  font-size: 1.2rem;
  font-weight: 700;
  display: block;
}

/* 半小時時段網格 */
.slots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(105px, 1fr));
  gap: 12px;
  margin-top: 15px;
}

.slot-btn {
  background: #ffffff;
  border: 1.5px solid #cbd5e0;
  border-radius: 10px;
  padding: 12px 6px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  position: relative;
}

.slot-btn .slot-time {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.slot-btn .slot-tag {
  font-size: 0.72rem;
  margin-top: 3px;
  display: block;
  font-weight: 500;
}

/* 可預約狀態 */
.slot-btn.available {
  border-color: #68d391;
  background-color: #f0fff4;
}

.slot-btn.available .slot-tag {
  color: #276749;
}

.slot-btn.available:hover {
  border-color: var(--primary-color);
  background-color: #c6f6d5;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

/* 選中狀態 */
.slot-btn.selected {
  background-color: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
  color: #ffffff !important;
  box-shadow: 0 6px 14px rgba(44, 94, 80, 0.35);
  transform: translateY(-2px);
}

.slot-btn.selected .slot-time,
.slot-btn.selected .slot-tag {
  color: #ffffff !important;
}

/* 已被佔用/不可用狀態 */
.slot-btn.occupied,
.slot-btn.insufficient,
.slot-btn.past {
  background-color: #edf2f7;
  border-color: #e2e8f0;
  cursor: not-allowed;
  opacity: 0.65;
}

.slot-btn.occupied .slot-tag {
  color: #e53e3e;
}

.slot-btn.insufficient .slot-tag {
  color: #a0aec0;
}

.slot-btn.past .slot-tag {
  color: #a0aec0;
}

/* 服務項目卡片 */
.service-card {
  border: 2px solid #e2e8f0;
  border-radius: var(--border-radius);
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
  background: #ffffff;
  margin-bottom: 12px;
}

.service-card:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
}

.service-card.selected {
  border-color: var(--primary-color);
  background: #f0fdf4;
  box-shadow: 0 4px 12px rgba(44, 94, 80, 0.15);
}

/* 時長單選按鈕群組 */
.duration-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.duration-btn {
  flex: 1 1 calc(33.333% - 12px);
  min-width: 110px;
  border: 1.5px solid #cbd5e0;
  background: #ffffff;
  border-radius: 10px;
  padding: 12px 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.duration-btn:hover:not(.disabled) {
  border-color: var(--primary-color);
  background: var(--primary-light);
}

.duration-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(44, 94, 80, 0.25);
}

.duration-btn.disabled {
  background: #f7fafc;
  border-color: #edf2f7;
  color: #a0aec0;
  cursor: not-allowed;
}

/* 預約摘要橫幅 */
.summary-bar {
  background: #fffaf0;
  border: 1px solid #feebc8;
  border-left: 5px solid var(--secondary-color);
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 20px;
}

.btn-primary-custom {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: #ffffff;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1.1rem;
  transition: all 0.2s;
}

.btn-primary-custom:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(44, 94, 80, 0.3);
}

/* 響應式優化 */
@media (max-width: 768px) {
  .hero-banner {
    padding: 24px 16px;
    border-radius: 10px;
  }
  .hero-banner h1 {
    font-size: 1.5rem;
  }
  .booking-card {
    padding: 18px 14px;
  }
  .slots-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .duration-btn {
    flex: 1 1 calc(50% - 8px);
  }
}

@media (max-width: 480px) {
  .slots-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .slot-btn {
    padding: 10px 4px;
  }
  .slot-btn .slot-time {
    font-size: 0.95rem;
  }
}