/* ============================================================
   文件分享平台 - 手机端样式 (≤ 768px)
   紧凑单列布局 + 底部导航栏 + 底部抽屉式弹窗
   ============================================================ */

/* 页面容器：全宽，最小留白，底部留出底部导航空间 */
.page-container {
  padding: 8px 10px 84px;
}

/* 页面头部 */
.page-header {
  padding: 20px 14px;
  margin: -8px -10px 12px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}
.page-header h1 { font-size: 20px; }
.page-header .subtitle { font-size: 13px; }

/* 顶部导航：贴顶、紧凑 */
.nav-bar {
  position: sticky;
  top: 0;
  border-radius: 0;
  margin: -8px -10px 10px;
  padding: 10px 14px;
  box-shadow: var(--shadow-sm);
  z-index: 20;
}
.nav-logo { font-size: 16px; }
.nav-username { display: none; }

/* Tab 切换：紧凑 */
.tabs-container {
  padding: 5px;
  gap: 6px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
}
.tab-item {
  padding: 8px 12px;
  font-size: 13px;
}

/* ============================================================
   文件卡片：紧凑
   ============================================================ */
.file-list {
  gap: 12px;
}
.file-card {
  padding: 14px;
  border-radius: var(--radius-md);
}
.file-card:hover {
  transform: none;   /* 手机端不要 hover 位移 */
}
.file-card-header {
  margin-bottom: 10px;
  gap: 8px;
}
.publisher-avatar {
  width: 30px;
  height: 30px;
}
.publisher-avatar-placeholder { font-size: 14px; }
.publisher-name { font-size: 13px; }
.publish-time { font-size: 11px; }
.file-card-title {
  font-size: 15px;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.file-card-desc {
  font-size: 13px;
  margin-bottom: 10px;
  -webkit-line-clamp: 2;
}
.file-tag {
  font-size: 11px;
  padding: 2px 8px;
}
.file-tags { gap: 6px; margin-bottom: 10px; }

.file-preview-section {
  padding: 10px;
  gap: 10px;
  margin-bottom: 10px;
}
.file-preview-image {
  width: 60px;
  height: 46px;
}
.file-preview-icon { font-size: 24px; }
.file-preview-name { font-size: 13px; }
.file-preview-size { font-size: 11px; }

.file-card-footer {
  gap: 14px;
  padding-top: 10px;
  flex-wrap: wrap;
}
.stat-item {
  font-size: 12px;
  gap: 3px;
}
.stat-icon { font-size: 13px; }

/* 删除按钮：整行 */
.delete-btn-wrapper {
  margin-left: 0;
  width: 100%;
}
.btn-delete-sm {
  width: 100%;
  padding: 6px 10px;
  font-size: 12px;
}

/* ============================================================
   详情页：紧凑
   ============================================================ */
.detail-container,
.comments-section,
.form-container {
  padding: 14px;
  border-radius: var(--radius-md);
}
.detail-header {
  padding-bottom: 14px;
  margin-bottom: 14px;
}
.detail-title {
  font-size: 18px;
  margin-bottom: 8px;
}
.detail-meta { gap: 8px; flex-wrap: wrap; }
.detail-publisher-avatar {
  width: 28px;
  height: 28px;
}
.detail-publisher-name { font-size: 13px; }
.detail-time { font-size: 12px; }
.detail-description {
  font-size: 14px;
  margin-bottom: 14px;
}
.detail-file-section {
  padding: 14px;
  margin-bottom: 14px;
}
.detail-file-preview img {
  max-height: 280px;
}
.detail-file-icon-lg {
  font-size: 56px;
  margin-bottom: 8px;
}
.detail-file-name { font-size: 14px; }
.detail-file-size { font-size: 12px; margin-bottom: 12px; }
.detail-stats {
  gap: 12px;
  padding: 12px 0;
  margin-bottom: 14px;
}
.detail-stat-item {
  font-size: 13px;
  gap: 6px;
}
.detail-stat-icon { font-size: 15px; }
.detail-delete-wrapper {
  margin-left: 0;
  width: 100%;
}
.detail-delete-wrapper .btn-delete-sm {
  padding: 8px 12px;
}

/* 评论区 */
.comments-header {
  margin-bottom: 14px;
  padding-bottom: 12px;
}
.comments-title { font-size: 15px; }
.comments-count { font-size: 13px; }
.comment-input-section {
  margin-bottom: 14px;
  padding-bottom: 14px;
}
.comment-input {
  padding: 8px 12px;
  font-size: 13px;
  min-height: 40px;
}
.comment-avatar {
  width: 30px;
  height: 30px;
}
.comment-avatar-placeholder { font-size: 13px; }
.comment-author { font-size: 13px; }
.comment-time { font-size: 11px; }
.comment-content { font-size: 13px; }
.comment-item { gap: 10px; }
.comment-list { gap: 14px; }
.empty-comments {
  padding: 28px 12px;
  font-size: 13px;
}
.login-hint {
  padding: 12px;
  font-size: 13px;
}

/* ============================================================
   发布表单：紧凑
   ============================================================ */
.form-section { margin-bottom: 16px; }
.form-label {
  font-size: 13px;
  margin-bottom: 6px;
}
.required { font-size: 13px; }
.form-input,
.form-textarea {
  padding: 10px 12px;
  font-size: 13px;
}
.form-textarea {
  min-height: 90px;
}
.input-counter { font-size: 11px; }
.form-hint { font-size: 11px; }
.tags-input-container {
  padding: 8px;
  min-height: 40px;
  gap: 6px;
}
.tag-chip { font-size: 12px; padding: 3px 8px; }
.tag-input { font-size: 13px; }

.file-upload-area {
  padding: 24px 12px;
}
.file-upload-icon {
  font-size: 36px;
  margin-bottom: 8px;
}
.file-upload-text { font-size: 14px; }
.file-upload-hint { font-size: 12px; }
.file-upload-info {
  padding: 10px 12px;
  gap: 10px;
}
.file-upload-info-icon { font-size: 26px; }
.file-upload-info-name { font-size: 13px; }
.file-upload-info-size { font-size: 11px; }
.file-upload-remove {
  padding: 5px 10px;
  font-size: 11px;
}

.btn { padding: 9px 16px; font-size: 13px; }
.btn-lg { padding: 12px 22px; font-size: 15px; }

/* ============================================================
   返回链接
   ============================================================ */
.back-link {
  margin-bottom: 10px;
  padding: 5px 10px;
  font-size: 13px;
}

/* ============================================================
   浮动按钮（显示在底部导航上方）
   ============================================================ */
.floating-btn {
  bottom: calc(76px + env(safe-area-inset-bottom));
  right: 16px;
  width: 52px;
  height: 52px;
  font-size: 24px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.floating-btn.hidden-scroll {
  transform: translateY(140%);
  opacity: 0;
}

/* ============================================================
   底部导航栏
   ============================================================ */
.bottom-nav {
  display: flex;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-white);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
  z-index: 50;
  padding: 5px 0 calc(5px + env(safe-area-inset-bottom));
}
.bottom-nav-item {
  padding: 6px 0;
  gap: 2px;
}
.bottom-nav-icon { font-size: 20px; }
.bottom-nav-label { font-size: 11px; }

/* ============================================================
   弹窗：底部抽屉式
   ============================================================ */
.modal-backdrop {
  align-items: flex-end;
  padding: 0;
}
.modal-content {
  max-width: 100%;
  width: 100%;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  animation: slideUp 0.25s ease;
}
.modal-header { padding: 16px 18px; }
.modal-body { padding: 18px; }
.modal-footer {
  padding: 14px 18px;
  flex-direction: column-reverse;
  gap: 8px;
}
.modal-footer .btn { width: 100%; }

/* ============================================================
   空状态 / 加载 / Toast
   ============================================================ */
.empty-state {
  padding: 40px 16px;
}
.empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
}
.empty-title { font-size: 15px; }
.empty-subtitle { font-size: 13px; }

.loading-state { padding: 40px 16px; }
.loading-spinner-sm { width: 28px; height: 28px; }

/* Toast 靠下，避开顶部导航 */
.toast-message {
  top: auto;
  bottom: 90px;
  padding: 10px 20px;
  font-size: 13px;
}
.toast-message.show {
  transform: translateX(-50%) translateY(0);
}

/* 加载更多 */
.load-more-container { padding: 14px; }
.load-more-btn {
  padding: 9px 20px;
  font-size: 13px;
}

/* 加载遮罩 */
.loading-overlay { padding-bottom: 60px; }

/* 我的页菜单：紧凑 */
.mine-menu-section {
  margin: 10px 10px 16px;
}
.mine-menu-item {
  padding: 10px 12px;
  font-size: 13px;
}
.mine-menu-icon {
  width: 28px;
  height: 28px;
  font-size: 14px;
}
.mine-menu-value {
  font-size: 12px;
  padding: 1px 8px;
}
/* 子Tab：返回按钮 + Tab切换（紧凑） */
.mine-tabs.mine-sub-tabs {
  top: 52px;
  margin: 0 10px 14px;
}
.mine-back-btn {
  padding: 6px 10px;
  font-size: 13px;
}
.mine-tabs.mine-sub-tabs .mine-tab {
  padding: 9px 10px;
  font-size: 13px;
}