/* =================================================================
   app-shell.css - 5 tab 顶 nav + 系统设置按钮 (Layout Shell 阶段)
   §27 Notion 风格调色板统一 (主色: 跟 logo P 字 #20905f 深绿)
   ================================================================= */

/* ============== Notion 风调色板(13 页共享) ============== */
:root {
  /* ---- 主色 (P 字深绿,从 logo 提取) ---- */
  --color-primary:        #20905f;                       /* P 字主色 */
  --color-primary-hover:  #1a7a52;                       /* hover 加深 */
  --color-primary-active: #156542;                       /* active 更深 */
  --color-primary-dark:   #064729;                       /* P 字深色 (文本/边框) */
  --color-primary-light:  #dcfce7;                       /* 浅底 (Tailwind green-100) */
  --color-primary-soft:   #f0fdf4;                       /* 更浅底 (Tailwind green-50) */

  /* ---- 文本 (Notion 灰阶) ---- */
  --color-text:        #37352f;                           /* Notion 主文 */
  --color-text-soft:   #787774;                           /* Notion 次文 */
  --color-text-muted:  #9b9b9b;                           /* Notion 弱文 */
  --color-text-strong: #1f1e1c;                           /* Notion 强调 */

  /* ---- 背景 ---- */
  --color-bg:        #ffffff;
  --color-bg-soft:   #fafaf9;                            /* Notion 主底 */
  --color-bg-hover:  #f1f1ef;                            /* Notion hover */
  --color-bg-active: #e9e9e7;                            /* Notion active */
  --color-bg-muted:  #f7f6f3;                            /* Notion 卡片底 */

  /* ---- 边框 ---- */
  --color-border:        #e9e9e7;                          /* Notion 主边 */
  --color-border-soft:   #f1f1ef;
  --color-border-strong: #dfdfe8;
  --color-border-focus:  #20905f;                          /* focus 用主色 */

  /* ---- 状态色 (Notion 风低饱和) ---- */
  --color-success:      #0f7b0f;
  --color-success-bg:   #dbeddb;                          /* 浅绿底 */
  --color-warning:      #cb912f;
  --color-warning-bg:   #fdecc8;                          /* 浅黄底 */
  --color-danger:       #e03e3e;
  --color-danger-bg:    #fde7e9;                          /* 浅红底 */
  --color-info:         #2383e2;                          /* 保留蓝色信息 */
  --color-info-bg:      #ddebf6;

  /* ---- 阴影 (Notion 极浅) ---- */
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:  0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg:  0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-xl:  0 8px 24px rgba(0, 0, 0, 0.08);

  /* ---- 圆角 ---- */
  --radius-sm: 4px;
  --radius-md: 6px;                                       /* Notion 默认 */
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* ---- 间距 ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* ---- focus shadow (蓝色 → 绿色) ---- */
  --focus-ring: 0 0 0 3px rgba(32, 144, 95, 0.12);     /* 绿色 focus 环 */
  --hover-ring: 0 0 0 2px rgba(32, 144, 95, 0.15);

  /* ---- 兼容别名 (v1 旧代码继续可用) ---- */
  --shell-bg:        var(--color-bg);
  --shell-bg-soft:   var(--color-bg-soft);
  --shell-border:    var(--color-border);
  --shell-border-soft: var(--color-border-soft);
  --shell-text:      var(--color-text);
  --shell-text-soft: var(--color-text-soft);
  --shell-text-muted: var(--color-text-muted);
  --shell-primary:   var(--color-primary);              /* 已变绿 */
  --shell-shadow:    var(--shadow-sm);
  --shell-radius:    var(--radius-md);

  --shell-header-height: 60px;
  --shell-nav-height: 44px;
  --shell-footer-height: auto;
}

/* ============== 全局 ============== */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--shell-bg-soft);
  color: var(--shell-text);
  font-size: 14px;
  line-height: 1.5;
}

/* ============== Header(品牌 + 用户头像) ============== */
.app-shell-header {
  display: flex;
  align-items: center;
  height: var(--shell-header-height);
  padding: 0 24px;
  background: var(--shell-bg);
  border-bottom: 1px solid var(--shell-border);
  box-shadow: var(--shell-shadow);
  gap: 16px;
}

.app-shell-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--shell-text);
  white-space: nowrap;
}

.app-shell-version {
  font-size: 11px;
  font-weight: 400;
  color: var(--shell-text-muted);
  background: var(--shell-bg-soft);
  border: 1px solid var(--shell-border);
  border-radius: 9px;
  padding: 1px 7px;
  margin-left: 2px;
  letter-spacing: 0.3px;
}

.app-shell-brand img {
  height: 28px;
  width: auto;
}

.app-shell-spacer {
  flex: 1;
}

.app-shell-system-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--shell-text);
  background: var(--shell-bg);
  border: 1px solid var(--shell-border);
  border-radius: var(--shell-radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.app-shell-system-btn:hover {
  background: var(--shell-bg-soft);
  border-color: var(--shell-text-muted);
}

/* ============== 用户头像 dropdown ============== */
.app-shell-user {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px 6px 6px;
  background: var(--shell-bg);
  border: 1px solid var(--shell-border);
  border-radius: 18px;
  cursor: pointer;
  font-size: 13px;
  color: var(--shell-text);
  user-select: none;
}

.app-shell-user:hover {
  background: var(--shell-bg-soft);
}

.app-shell-user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--shell-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

.app-shell-user-name {
  font-weight: 500;
}

.app-shell-user-role {
  font-size: 11px;
  color: var(--shell-text-muted);
  padding: 1px 6px;
  background: var(--shell-bg-soft);
  border-radius: 8px;
}

.app-shell-user-arrow {
  font-size: 9px;
  color: var(--shell-text-muted);
}

.app-shell-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 180px;
  background: var(--shell-bg);
  border: 1px solid var(--shell-border);
  border-radius: var(--shell-radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 4px 0;
  z-index: 1000;
  display: none;
}

.app-shell-dropdown.show {
  display: block;
}

.app-shell-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--shell-text);
  cursor: pointer;
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.app-shell-dropdown-item:hover {
  background: var(--shell-bg-soft);
}

.app-shell-dropdown-divider {
  height: 1px;
  margin: 4px 0;
  background: var(--shell-border);
}

.app-shell-dropdown-item.danger {
  color: #d44c47;
}

/* ============== Nav(5 tab 下划线 active) ============== */
.app-shell-nav {
  display: flex;
  align-items: stretch;
  height: var(--shell-nav-height);
  padding: 0 24px;
  background: var(--shell-bg);
  border-bottom: 1px solid var(--shell-border);
  gap: 0;
  overflow-x: auto;
}

.app-shell-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 18px;
  font-size: 14px;
  color: var(--shell-text-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.app-shell-nav-link:hover {
  color: var(--shell-text);
}

.app-shell-nav-link.active {
  color: var(--shell-text);
  font-weight: 600;
  border-bottom-color: var(--shell-text);
}

/* ============== Main 内容容器 ============== */
.app-shell-main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  min-height: calc(100vh - var(--shell-header-height) - var(--shell-nav-height) - 80px);
}

.app-shell-page-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--shell-text);
  margin: 0 0 20px 0;
}

/* ============== Footer(作者声明 + 二维码) ============== */
.app-shell-footer {
  margin-top: 40px;
  padding: 20px 24px;
  background: var(--shell-bg);
  border-top: 1px solid var(--shell-border);
  display: flex;
  align-items: flex-start;
  gap: 20px;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

.app-shell-footer-text {
  flex: 1;
  font-size: 12px;
  color: var(--shell-text-muted);
  line-height: 1.7;
}

.app-shell-footer-text strong {
  color: var(--shell-text);
}

.app-shell-footer-qr {
  width: 80px;
  height: 80px;
  border-radius: 4px;
  flex-shrink: 0;
}

.app-shell-footer-qr-label {
  font-size: 11px;
  color: var(--shell-text-muted);
  text-align: center;
  margin-top: 4px;
}

/* ============== Responsive ============== */
@media (max-width: 768px) {
  .app-shell-header {
    padding: 0 12px;
  }

  .app-shell-nav {
    padding: 0 12px;
  }

  .app-shell-main {
    padding: 16px 12px;
  }

  .app-shell-nav-link {
    padding: 0 12px;
    font-size: 13px;
  }

  .app-shell-footer {
    flex-direction: column;
    gap: 12px;
  }
}

/* ============== Preview 懒加载 loading UI (§23) ============== */
.preview-loading {
  padding: 40px 20px;
  text-align: center;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.preview-loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #e2e8f0;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: preview-spin 1s linear infinite;
  margin-bottom: 16px;
}

.preview-loading-text {
  color: #475569;
  font-size: 14px;
  margin-bottom: 6px;
}

.preview-loading-hint {
  color: #94a3b8;
  font-size: 12px;
  word-break: break-all;
  max-width: 480px;
}

.preview-error {
  background: #fee2e2;
  color: #b91c1c;
  padding: 8px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
  font-size: 13px;
}

/* ============== PDF 预览(§24 缩放 + 文字层) ============== */
.preview-pdf {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-pdf-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.preview-pdf-btn {
  border: 1px solid #cbd5e1;
  background: white;
  color: #1e293b;
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  min-width: 32px;
  transition: background 0.1s;
}

.preview-pdf-btn:hover {
  background: var(--color-primary-light);
  border-color: #818cf8;
}

.preview-pdf-btn:active {
  background: var(--color-primary-light);
}

.preview-pdf-scale {
  display: inline-block;
  min-width: 50px;
  text-align: center;
  font-size: 13px;
  color: #475569;
  font-variant-numeric: tabular-nums;
}

.preview-pdf-spacer {
  flex: 1;
}

.preview-pdf-pageinfo {
  font-size: 12px;
  color: #64748b;
}

.preview-pdf-pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 12px;
  background: #475569;
  border-radius: 4px;
  overflow: auto;
  max-height: 70vh;
}

.preview-pdf-page {
  position: relative;
  margin: 0 auto;
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  display: block;
}

.preview-pdf-canvas {
  display: block;
  position: relative;
  z-index: 1;
}

.preview-pdf-textLayer {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  opacity: 0.25;
  line-height: 1;
  text-size-adjust: none;
  -webkit-text-size-adjust: none;
  forced-color-adjust: none;
  z-index: 2;
  user-select: text;
  -webkit-user-select: text;
}

.preview-pdf-textLayer span,
.preview-pdf-textLayer br {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
}

.preview-pdf-textLayer ::selection {
  background: var(--color-primary);
  background-color: Highlight;
  color: transparent;
}

.preview-pdf-textLayer ::-moz-selection {
  background: var(--color-primary);
  background-color: Highlight;
  color: transparent;
}

.preview-pdf-label {
  text-align: center;
  font-size: 12px;
  color: #94a3b8;
  margin-top: 4px;
}

/* ============== TIFF 多页预览(§24) ============== */
.preview-tiff-multi {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-tiff-canvas-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #1e293b;
  border-radius: 4px;
  padding: 12px;
  min-height: 200px;
  max-height: 75vh;
  overflow: auto;
}

.preview-tiff-page {
  display: block;
  max-width: 100%;
  height: auto;
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* ============== Page nav 通用(§24 多页 TIFF + 备用其他) ============== */
.preview-pagenav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
}

.preview-pagenav-btn {
  border: 1px solid #cbd5e1;
  background: white;
  color: #1e293b;
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  min-width: 36px;
  transition: background 0.1s;
}

.preview-pagenav-btn:hover {
  background: var(--color-primary-light);
  border-color: #818cf8;
}

.preview-pagenav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.preview-pagenav-info {
  font-size: 13px;
  color: #475569;
  font-variant-numeric: tabular-nums;
  min-width: 80px;
  text-align: center;
}