/*
 * ============================================================
 * ftf-components.css — 外贸端前台基础组件（Foreign-Trade Front Components）
 * 规范：docs/14_外贸系统/第二阶段/外贸端前台UI设计规范_v0.1.md §1.2
 * 状态：T2 基础件（Button/Typography/Grid/Form/Message/Modal/Pagination/Breadcrumb/Tabs/Empty/Statistic/Image/Badge）
 * 依赖：ftf-tokens.css（--ftf-* 变量）
 * 说明：所有组件类前缀 .ftf-；禁止 inline style 覆盖
 * ============================================================
 */

/* ========== 1. Button 按钮 ========== */
.ftf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ftf-space-2);
  height: 38px;
  padding: 0 var(--ftf-space-5);
  border: 1px solid transparent;
  border-radius: var(--ftf-radius-sm);
  font-size: var(--ftf-font-size-base);
  font-weight: var(--ftf-font-weight-strong);
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.ftf-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.ftf-btn--primary { background: var(--ftf-primary); color: #fff; }
.ftf-btn--primary:hover { background: var(--ftf-primary-hover); color: #fff; }
.ftf-btn--primary:active { background: var(--ftf-primary-active); }
.ftf-btn--default { background: var(--ftf-bg); border-color: var(--ftf-border-strong); color: var(--ftf-text); }
.ftf-btn--default:hover { border-color: var(--ftf-primary); color: var(--ftf-primary); }
.ftf-btn--ghost { background: transparent; border-color: var(--ftf-primary); color: var(--ftf-primary); }
.ftf-btn--ghost:hover { background: var(--ftf-primary-bg); }
.ftf-btn--link { background: none; border: none; color: var(--ftf-link); padding: 0; height: auto; font-weight: 400; }
.ftf-btn--link:hover { text-decoration: underline; }
.ftf-btn--sm { height: 30px; padding: 0 var(--ftf-space-3); font-size: var(--ftf-font-size-sm); }
.ftf-btn--lg { height: 46px; padding: 0 var(--ftf-space-7); font-size: var(--ftf-font-size-lg); }

/* ========== 2. Typography 排版 ========== */
.ftf-h1, .ftf-h2, .ftf-h3 { margin: 0 0 var(--ftf-space-3); font-weight: 700; line-height: 1.3; }
.ftf-h1 { font-size: var(--ftf-font-size-h1); }
.ftf-h2 { font-size: var(--ftf-font-size-h2); }
.ftf-h3 { font-size: var(--ftf-font-size-h3); }
.ftf-text { font-size: var(--ftf-font-size-base); color: var(--ftf-text); line-height: var(--ftf-line-height); }
.ftf-text-secondary { font-size: var(--ftf-font-size-base); color: var(--ftf-text-secondary); }
.ftf-text-muted { font-size: var(--ftf-font-size-sm); color: var(--ftf-text-muted); }
.ftf-text-xs { font-size: var(--ftf-font-size-xs); }

/* ========== 3. Grid 栅格 ========== */
.ftf-grid { display: grid; gap: var(--ftf-space-5); }
.ftf-grid--2 { grid-template-columns: repeat(2, 1fr); }
.ftf-grid--3 { grid-template-columns: repeat(3, 1fr); }
.ftf-grid--4 { grid-template-columns: repeat(4, 1fr); }
.ftf-flex { display: flex; align-items: center; gap: var(--ftf-space-3); }
.ftf-flex--between { justify-content: space-between; }
.ftf-flex--wrap { flex-wrap: wrap; }
.ftf-flex--1 { flex: 1; }

/* ========== 4. Form 表单 ========== */
.ftf-form { display: flex; flex-direction: column; gap: var(--ftf-space-4); }
.ftf-form-item { display: flex; flex-direction: column; gap: var(--ftf-space-2); }
.ftf-form-label { font-size: var(--ftf-font-size-sm); font-weight: var(--ftf-font-weight-strong); color: var(--ftf-text); }
.ftf-form-label .ftf-req { color: var(--ftf-error); margin-inline-start: 2px; }
.ftf-input,
.ftf-select,
.ftf-textarea {
  width: 100%;
  height: 38px;
  padding: 0 var(--ftf-space-3);
  border: 1px solid var(--ftf-border-strong);
  border-radius: var(--ftf-radius-sm);
  font-size: var(--ftf-font-size-base);
  color: var(--ftf-text);
  background: var(--ftf-bg);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.ftf-textarea { height: auto; min-height: 96px; padding: var(--ftf-space-3); line-height: var(--ftf-line-height); resize: vertical; }
.ftf-input:focus, .ftf-select:focus, .ftf-textarea:focus {
  outline: none;
  border-color: var(--ftf-primary);
  box-shadow: 0 0 0 3px var(--ftf-primary-bg);
}
.ftf-input--error, .ftf-textarea--error { border-color: var(--ftf-error); }
.ftf-form-error { font-size: var(--ftf-font-size-xs); color: var(--ftf-error); }
.ftf-form-help { font-size: var(--ftf-font-size-xs); color: var(--ftf-text-muted); }
.ftf-form-actions { display: flex; justify-content: flex-end; gap: var(--ftf-space-3); margin-top: var(--ftf-space-2); }

/* ========== 5. Message 提示 ========== */
.ftf-message-wrap { position: fixed; top: 24px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.ftf-message {
  display: flex; align-items: center; gap: var(--ftf-space-2);
  padding: 10px 16px; border-radius: var(--ftf-radius-sm);
  background: #fff; box-shadow: var(--ftf-shadow-pop);
  font-size: var(--ftf-font-size-base); color: var(--ftf-text);
  animation: ftfMsgIn 0.25s ease;
}
.ftf-message--success { border-left: 3px solid var(--ftf-success); }
.ftf-message--error { border-left: 3px solid var(--ftf-error); }
.ftf-message--warning { border-left: 3px solid var(--ftf-warning); }
.ftf-message--info { border-left: 3px solid var(--ftf-primary); }
@keyframes ftfMsgIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ========== 6. Modal 弹窗 ========== */
.ftf-modal-mask {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.45);
  display: none; align-items: center; justify-content: center; z-index: 9000; padding: var(--ftf-space-5);
}
.ftf-modal-mask--open { display: flex; }
.ftf-modal {
  width: 100%; max-width: 520px; max-height: 85vh; overflow: auto;
  background: #fff; border-radius: var(--ftf-radius); box-shadow: var(--ftf-shadow-pop);
  animation: ftfModalIn 0.25s ease;
}
.ftf-modal--sm { max-width: 400px; }
.ftf-modal--lg { max-width: 720px; }
.ftf-modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--ftf-space-4) var(--ftf-space-5); border-bottom: 1px solid var(--ftf-border); }
.ftf-modal-title { font-size: var(--ftf-font-size-lg); font-weight: 700; margin: 0; }
.ftf-modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--ftf-text-muted); line-height: 1; padding: 4px; }
.ftf-modal-close:hover { color: var(--ftf-text); }
.ftf-modal-body { padding: var(--ftf-space-5); }
.ftf-modal-footer { display: flex; justify-content: flex-end; gap: var(--ftf-space-3); padding: var(--ftf-space-4) var(--ftf-space-5); border-top: 1px solid var(--ftf-border); }
@keyframes ftfModalIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ========== 7. Pagination 分页 ========== */
.ftf-pagination { display: flex; align-items: center; justify-content: center; gap: var(--ftf-space-1); margin-top: var(--ftf-space-6); flex-wrap: wrap; }
.ftf-pagination a, .ftf-pagination span {
  min-width: 32px; height: 32px; padding: 0 var(--ftf-space-2);
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--ftf-border); border-radius: var(--ftf-radius-sm);
  font-size: var(--ftf-font-size-sm); color: var(--ftf-text-secondary); background: #fff;
  text-decoration: none; transition: all 0.2s;
}
.ftf-pagination a:hover { border-color: var(--ftf-primary); color: var(--ftf-primary); }
.ftf-pagination .active { background: var(--ftf-primary); border-color: var(--ftf-primary); color: #fff; }
.ftf-pagination .disabled { opacity: 0.5; pointer-events: none; }

/* ========== 8. Breadcrumb 面包屑 ========== */
.ftf-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: var(--ftf-space-2); font-size: var(--ftf-font-size-sm); color: var(--ftf-text-muted); margin-bottom: var(--ftf-space-5); }
.ftf-breadcrumb a { color: var(--ftf-text-secondary); text-decoration: none; }
.ftf-breadcrumb a:hover { color: var(--ftf-primary); }
.ftf-breadcrumb-sep { color: var(--ftf-border-strong); }

/* ========== 9. Tabs 标签页 ========== */
.ftf-tabs { display: flex; gap: var(--ftf-space-1); border-bottom: 1px solid var(--ftf-border); margin-bottom: var(--ftf-space-5); overflow-x: auto; }
.ftf-tabs-item {
  padding: var(--ftf-space-3) var(--ftf-space-4);
  font-size: var(--ftf-font-size-base); color: var(--ftf-text-secondary);
  cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px;
  white-space: nowrap; background: none; border-top: none; border-left: none; border-right: none;
  transition: color 0.2s, border-color 0.2s;
}
.ftf-tabs-item:hover { color: var(--ftf-primary); }
.ftf-tabs-item--active { color: var(--ftf-primary); border-bottom-color: var(--ftf-primary); font-weight: var(--ftf-font-weight-strong); }
.ftf-tabs-panel { display: none; }
.ftf-tabs-panel--active { display: block; }

/* ========== 10. Empty 空状态 ========== */
.ftf-empty { display: flex; flex-direction: column; align-items: center; gap: var(--ftf-space-3); padding: var(--ftf-space-8) var(--ftf-space-5); color: var(--ftf-text-muted); text-align: center; }
.ftf-empty-icon { font-size: 48px; line-height: 1; opacity: 0.5; }
.ftf-empty-text { font-size: var(--ftf-font-size-base); }

/* ========== 11. Statistic 统计 ========== */
.ftf-stat { text-align: center; padding: var(--ftf-space-4); }
.ftf-stat-value { font-size: 28px; font-weight: 700; color: var(--ftf-primary); line-height: 1.2; }
.ftf-stat-label { font-size: var(--ftf-font-size-sm); color: var(--ftf-text-secondary); margin-top: var(--ftf-space-1); }

/* ========== 12. Image 图片 ========== */
.ftf-img { display: block; max-width: 100%; height: auto; border-radius: var(--ftf-radius-sm); }
.ftf-img--cover { object-fit: cover; }
.ftf-img--round { border-radius: var(--ftf-radius); }

/* ========== 13. Badge 徽标 ========== */
.ftf-badge {
  display: inline-flex; align-items: center; padding: 2px 8px;
  border-radius: var(--ftf-radius-round); font-size: var(--ftf-font-size-xs);
  font-weight: 600; line-height: 1.6;
}
.ftf-badge--primary { background: var(--ftf-primary-bg); color: var(--ftf-primary); }
.ftf-badge--success { background: var(--ftf-success-bg); color: var(--ftf-success); }
.ftf-badge--warning { background: var(--ftf-warning-bg); color: var(--ftf-warning); }
.ftf-badge--error { background: var(--ftf-error-bg); color: var(--ftf-error); }
.ftf-badge--default { background: var(--ftf-bg-gray); color: var(--ftf-text-secondary); }

/* ========== 通用工具 ========== */
.ftf-mt-1 { margin-top: var(--ftf-space-1); }
.ftf-mt-2 { margin-top: var(--ftf-space-2); }
.ftf-mt-3 { margin-top: var(--ftf-space-3); }
.ftf-mt-4 { margin-top: var(--ftf-space-4); }
.ftf-mt-5 { margin-top: var(--ftf-space-5); }
.ftf-mt-6 { margin-top: var(--ftf-space-6); }
.ftf-mb-4 { margin-bottom: var(--ftf-space-4); }
.ftf-mb-5 { margin-bottom: var(--ftf-space-5); }
.ftf-text-center { text-align: center; }
.ftf-text-right { text-align: right; }

/* ========== RTL 镜像 ========== */
[dir="rtl"] .ftf-form-actions { justify-content: flex-start; }
[dir="rtl"] .ftf-flex { flex-direction: row-reverse; }