/* ============== 现代化钢琴房预约系统样式 ============== */

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  --dark-bg: #1f2937;
  --light-bg: #f9fafb;
  --border-color: #e5e7eb;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  color: var(--text-primary);
}

/* ============== 容器布局 ============== */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.auth-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ============== 表单样式 ============== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.2s;
  background: white;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control:disabled {
  background-color: #f3f4f6;
  cursor: not-allowed;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5rem 1.5rem;
  padding-right: 2.5rem;
}

/* ============== 按钮样式 ============== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #6b7280;
  color: white;
}

.btn-secondary:hover:not(:disabled) {
  background: #4b5563;
}

.btn-success {
  background: var(--success-color);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: #059669;
}

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

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-warning {
  background: var(--warning-color);
  color: white;
}

.btn-warning:hover:not(:disabled) {
  background: #d97706;
}

.btn-info {
  background: var(--info-color);
  color: white;
}

.btn-info:hover:not(:disabled) {
  background: #2563eb;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

/* ============== 卡片样式 ============== */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

/* ============== 表格样式 ============== */
.table-container {
  overflow-x: auto;
  margin-top: 1rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table thead {
  background: var(--light-bg);
}

.table th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.table tbody tr:hover {
  background: var(--light-bg);
}

/* ============== 徽章样式 ============== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  white-space: nowrap;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge-info {
  background: #dbeafe;
  color: #1e40af;
}

.badge-primary {
  background: #e0e7ff;
  color: #3730a3;
}

/* ============== 导航栏 ============== */
.navbar {
  background: white;
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  margin-bottom: 2rem;
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ============== 主容器 ============== */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1rem;
}

/* ============== 筛选器 ============== */
.filter-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* ============== 房间列表 ============== */
.room-list {
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  background: var(--light-bg);
}

.room-item {
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: white;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.room-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.room-item.selected {
  background: var(--primary-light);
  color: white;
  border-color: var(--primary-dark);
}

/* ============== 时间段输入 ============== */
.slot-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.slot-input-group input {
  flex: 1;
}

.slot-input-group button {
  flex-shrink: 0;
}

/* ============== 复选框组 ============== */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkbox-item input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  cursor: pointer;
}

/* ============== 链接样式 ============== */
.link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}

.link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.link-center {
  text-align: center;
  margin-top: 1.5rem;
}

/* ============== 消息提示 ============== */
.alert {
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border-left: 4px solid var(--success-color);
}

.alert-danger {
  background: #fee2e2;
  color: #991b1b;
  border-left: 4px solid var(--danger-color);
}

.alert-warning {
  background: #fef3c7;
  color: #92400e;
  border-left: 4px solid var(--warning-color);
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
  border-left: 4px solid var(--info-color);
}

/* ============== 响应式设计 ============== */
@media (max-width: 768px) {
  .auth-card {
    padding: 1.5rem;
  }

  .auth-header h1 {
    font-size: 1.5rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

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

  .navbar-nav {
    width: 100%;
    justify-content: center;
  }

  .table-container {
    font-size: 0.75rem;
  }

  .table th,
  .table td {
    padding: 0.5rem;
  }

  .btn {
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
  }

  .btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
  }

  .filter-group {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: 1.25rem;
  }

  body {
    font-size: 0.875rem;
  }

  .slot-input-group {
    flex-direction: column;
  }

  .checkbox-group {
    flex-direction: column;
    gap: 0.75rem;
  }
}

/* ============== 加载动画 ============== */
.spinner {
  border: 3px solid rgba(99, 102, 241, 0.1);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============== 空状态 ============== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

/* ============== 工具类 ============== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-small { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.ml-1 { margin-left: 0.5rem; }
.mr-1 { margin-right: 0.5rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.hidden { display: none; }
.block { display: block; }

/* ============== 滚动条样式 ============== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}