/* ============================================================
   FoodFlow Ordering System - Design System (Design System)
   所有页面共享此文件，确保视觉风格一致
   ============================================================ */

/* ---------- CSS 变量：统一设计令牌 ---------- */
:root {
  /* 品牌主色 */
  --primary: #e85d3a;
  --primary-light: #ff7a5c;
  --primary-dark: #c94a2a;
  --primary-bg: #fff5f0;
  --primary-border: #f5d5c8;

  /* 辅助色 */
  --accent: #ffd93d;
  --accent-dark: #f0c419;

  /* 中性色 - 浅色主题 */
  --gray-50: #fafbfc;
  --gray-100: #f5f6f8;
  --gray-200: #eef0f3;
  --gray-300: #e0e3e8;
  --gray-400: #c4c9d1;
  --gray-500: #9aa0ab;
  --gray-600: #6b7280;
  --gray-700: #4b5563;
  --gray-800: #2d3138;
  --gray-900: #1a1d23;

  /* 深色主题 */
  --dark-bg: #15152a;
  --dark-bg-2: #1e1e33;
  --dark-card: #2d2d44;
  --dark-card-2: #25253a;
  --dark-border: rgba(255, 255, 255, 0.08);
  --dark-text: #f0f1f5;
  --dark-text-dim: #9598ab;

  /* 语义色 */
  --success: #2ecc71;
  --success-bg: #e3f5e3;
  --success-text: #1d7a3e;
  --warning: #f39c12;
  --warning-bg: #fff5e0;
  --warning-text: #b8742a;
  --danger: #e74c3c;
  --danger-bg: #fdecea;
  --danger-text: #c0392b;
  --info: #3498db;
  --info-bg: #e8f4fd;
  --info-text: #2471a3;

  /* 桌台状态 */
  --table-available: #2ecc71;
  --table-occupied: #f39c12;
  --table-reserved: #3498db;

  /* 圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.22);
  --shadow-primary: 0 4px 16px rgba(232, 93, 58, 0.25);

  /* 过渡 */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  /* 层级 */
  --z-dropdown: 100;
  --z-sticky: 100;
  --z-modal: 200;
  --z-toast: 999;
}

/* ---------- 全局重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  color: var(--gray-800);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  border: 1px solid transparent;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.08);
  box-shadow: 0 6px 20px rgba(232, 93, 58, 0.35);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border-color: var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-200);
}

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

.btn-success:hover:not(:disabled) {
  filter: brightness(1.08);
}

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

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
}

.btn-lg {
  height: 50px;
  padding: 0 28px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ---------- 通用输入框 ---------- */
.input,
.select,
.textarea {
  width: 100%;
  height: 42px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-300);
  background: #fff;
  color: var(--gray-800);
  font-size: 14px;
  transition: var(--transition-fast);
  outline: none;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(232, 93, 58, 0.12);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--gray-400);
}

.textarea {
  height: auto;
  min-height: 80px;
  padding: 10px 14px;
  resize: vertical;
}

.select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* ---------- 通用卡片 ---------- */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(0, 0, 0, 0.04);
  padding: var(--space-5);
}

/* ---------- 通用模态框 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: 16px;
}

.modal-overlay.open {
  display: flex;
}

.slf-modal {
  background: #fff;
  border-radius: var(--radius-lg);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.slf-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--gray-200);
  flex-shrink: 0;
}

.slf-modal-head h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-800);
}

.slf-modal-close {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.slf-modal-close:hover {
  background: var(--gray-200);
}

.slf-modal-body {
  padding: 22px;
  overflow-y: auto;
  flex: 1;
}

.slf-modal-foot {
  padding: 14px 22px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

/* ---------- 通用 Toast ---------- */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  z-index: var(--z-toast);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  max-width: 90%;
  text-align: center;
}

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

.toast.success {
  background: rgba(46, 204, 113, 0.92);
}

.toast.error {
  background: rgba(231, 76, 60, 0.92);
}

.toast.warning {
  background: rgba(243, 156, 18, 0.92);
}

/* ---------- 通用徽章 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-success {
  background: var(--success-bg);
  color: var(--success-text);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info-text);
}

.badge-primary {
  background: var(--primary-bg);
  color: var(--primary-dark);
}

/* ---------- 状态标签（订单/桌台） ---------- */
.status-tag {
  display: inline-block;
  padding: 3px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}

.status-pending {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.status-done {
  background: var(--success-bg);
  color: var(--success-text);
}

.status-canceled {
  background: var(--gray-200);
  color: var(--gray-500);
}

.status-available {
  background: var(--success-bg);
  color: var(--success-text);
}

.status-occupied {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.status-reserved {
  background: var(--info-bg);
  color: var(--info-text);
}

/* ---------- 通用表单 ---------- */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* ---------- 空状态 ---------- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-400);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state .text {
  font-size: 15px;
}

/* ---------- 加载动画 ---------- */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

/* ---------- 深色主题适配 ---------- */
.theme-dark {
  background: var(--dark-bg);
  color: var(--dark-text);
}

.theme-dark .card {
  background: var(--dark-card);
  border-color: var(--dark-border);
}

.theme-dark .input,
.theme-dark .select,
.theme-dark .textarea {
  background: var(--dark-bg-2);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

.theme-dark .input::placeholder {
  color: var(--dark-text-dim);
}

.theme-dark .btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--dark-text);
  border-color: var(--dark-border);
}

.theme-dark .slf-modal {
  background: var(--dark-card);
}

.theme-dark .slf-modal-head,
.theme-dark .slf-modal-foot {
  border-color: var(--dark-border);
}

.theme-dark .slf-modal-head h2 {
  color: var(--dark-text);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .slf-modal {
    max-width: 100%;
    border-radius: var(--radius);
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  body * {
    visibility: hidden;
  }
  .print-area,
  .print-area * {
    visibility: visible;
  }
  .print-area {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
}