/* ====== WordFlow Apple Design System — styles.css ====== */
/* 基于 DESIGN.md v1.0 Apple macOS / iOS 风格 */

/* ====== Reset & CSS Variables ====== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  /* —— Design tokens (DESIGN.md aligned) —— */
  --color-primary:#0071E3;
  --color-primary-hover:#0077ED;
  --color-primary-pressed:#0062C4;
  --color-primary-subtle:rgba(0,113,227,0.06);
  --color-secondary:#5E5CE6;

  --color-bg:#F5F5F7;
  --color-surface:#FFFFFF;
  --color-surface-elevated:#FFFFFF;
  --color-border:rgba(0,0,0,0.06);
  --color-border-strong:rgba(0,0,0,0.10);
  --color-text-primary:#1D1D1F;
  --color-text-secondary:#6E6E73;
  --color-text-tertiary:#AEAEB2;
  --color-overlay:rgba(0,0,0,0.45);

  --color-success:#34C759;
  --color-success-subtle:rgba(52,199,89,0.08);
  --color-warning:#FF9F0A;
  --color-warning-subtle:rgba(255,159,10,0.08);
  --color-danger:#FF3B30;
  --color-danger-subtle:rgba(255,59,48,0.08);
  --color-info:#32ADE6;

  /* —— Spacing —— */
  --space-xs:4px; --space-sm:8px; --space-md:12px; --space-lg:16px;
  --space-xl:24px; --space-2xl:32px; --space-3xl:48px; --space-4xl:64px;

  /* —— Radius —— */
  --radius-sm:8px; --radius:12px; --radius-lg:16px; --radius-xl:20px; --radius-full:9999px;

  /* —— Shadows —— */
  --shadow-sm:0 1px 3px rgba(0,0,0,0.04);
  --shadow-md:0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.08);
  --shadow-glow-primary:0 4px 20px rgba(0,113,227,0.25);
  --shadow-glow-success:0 4px 20px rgba(52,199,89,0.25);
  --shadow-glow-danger:0 4px 20px rgba(255,59,48,0.20);

  /* —— Layout —— */
  --sidebar-w:260px;
  --blur:blur(20px) saturate(180%);

  /* —— Compat aliases for existing code —— */
  --bg:var(--color-bg);
  --sidebar-bg:rgba(245,245,247,0.85);
  --card-bg:var(--color-surface);
  --text:var(--color-text-primary);
  --text-secondary:var(--color-text-secondary);
  --text-tertiary:var(--color-text-tertiary);
  --blue:var(--color-primary);
  --blue-hover:var(--color-primary-hover);
  --green:var(--color-success);
  --red:var(--color-danger);
  --orange:var(--color-warning);
  --border:var(--color-border);
}

/* ====== Base ====== */
html{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','SF Pro Text','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
  background:var(--color-bg);
  color:var(--color-text-primary);
  height:100vh;height:100dvh;
  display:flex;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow:hidden;
}

/* ====== Page Loading Overlay ====== */
#pageLoading{
  position:fixed;inset:0;z-index:10000;
  background:var(--color-bg);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;color:var(--color-text-tertiary);
  transition:opacity 0.3s ease;
}
#pageLoading.hide{opacity:0;pointer-events:none}

/* ====== Sidebar (Desktop) ====== */
.sidebar{
  width:var(--sidebar-w);height:100vh;height:100dvh;
  background:var(--sidebar-bg);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
  border-right:1px solid var(--color-border);
  display:flex;flex-direction:column;flex-shrink:0;
  z-index:10;
  transition:transform 0.25s ease;
}
.sidebar-header{padding:32px 24px 20px;position:relative}
.sidebar-toggle{
  position:absolute;top:28px;right:12px;
  width:28px;height:28px;border-radius:50%;
  border:0.5px solid var(--color-border);background:transparent;
  font-size:14px;color:var(--color-text-tertiary);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all 0.2s;
}
.sidebar-toggle:hover{background:rgba(0,0,0,0.05);color:var(--color-text-primary)}
/* Collapsed sidebar */
.sidebar.collapsed{width:54px}
.sidebar.collapsed .sidebar-header{padding:24px 8px 16px;text-align:center}
.sidebar.collapsed .sidebar-logo{font-size:14px}
.sidebar.collapsed .sidebar-sub{display:none}
.sidebar.collapsed .sidebar-toggle{position:static;margin:6px auto 0;border:none;transform:rotate(180deg)}
.sidebar.collapsed .nav-item{justify-content:center;padding:10px 0;font-size:0}
.sidebar.collapsed .nav-item .nav-icon{margin:0;font-size:20px}
.sidebar.collapsed .nav-badge{display:none}
.sidebar.collapsed .sidebar-footer{text-align:center;font-size:0;padding:12px 4px}
.sidebar.collapsed .sidebar-footer::after{content:'WF';font-size:12px;font-weight:700;color:var(--color-text-tertiary)}

/* Back to top */
.back-to-top{
  position:fixed;bottom:24px;right:24px;
  width:42px;height:42px;border-radius:50%;
  background:var(--blue);color:#fff;border:none;
  font-size:18px;cursor:pointer;display:none;
  align-items:center;justify-content:center;
  z-index:100;box-shadow:0 2px 12px rgba(0,113,227,0.3);
  transition:opacity 0.2s,transform 0.2s;
}
.back-to-top.visible{display:flex}
.back-to-top:active{transform:scale(0.9)}
@media(max-width:768px){
  .back-to-top{bottom:80px;right:16px}
  .sidebar-toggle{display:none}
}
.sidebar-logo{
  font-size:22px;font-weight:700;letter-spacing:-0.3px;
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.sidebar-sub{font-size:12px;color:var(--color-text-tertiary);margin-top:2px}

.sidebar-nav{flex:1;padding:0 12px;overflow-y:auto}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:500;color:var(--color-text-primary);
  cursor:pointer;transition:all 0.18s ease;margin-bottom:2px;
  border:none;background:none;width:100%;text-align:left;
  font-family:inherit;text-decoration:none;
  -webkit-tap-highlight-color:transparent;
}
.nav-item:hover{background:rgba(0,0,0,0.04)}
.nav-item.active{background:var(--color-primary-subtle);color:var(--color-primary);font-weight:600}
.nav-icon{font-size:18px;width:24px;text-align:center;flex-shrink:0}
.nav-badge{margin-left:auto;font-size:11px;color:var(--color-text-tertiary);font-weight:400}

.sidebar-footer{
  padding:16px 24px 24px;
  border-top:1px solid var(--color-border);
  font-size:12px;color:var(--color-text-tertiary);
  line-height:1.6;
}

/* ====== Main Layout ====== */
.main{
  flex:1;height:100vh;height:100dvh;
  display:flex;flex-direction:column;
  overflow:hidden;
}
.topbar{
  height:56px;
  display:flex;align-items:center;
  padding:0 32px;
  border-bottom:1px solid var(--color-border);
  background:rgba(245,245,247,0.7);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
  flex-shrink:0;gap:16px;
}
.topbar-title{font-size:16px;font-weight:600;color:var(--color-text-primary);flex:1}
.topbar-actions{display:flex;gap:8px;align-items:center}

.content{
  flex:1;overflow-y:auto;padding:28px 32px 40px;
  scroll-behavior:smooth;
}
.content::-webkit-scrollbar{width:6px}
.content::-webkit-scrollbar-track{background:transparent}
.content::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.12);border-radius:3px}
.content::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,0.18)}

/* ====== Cards ====== */
.card{
  background:var(--color-surface);
  border-radius:var(--radius-lg);
  padding:var(--space-xl);
  box-shadow:var(--shadow-sm);
  border:1px solid var(--color-border);
  margin-bottom:var(--space-lg);
  transition:box-shadow 0.2s ease,border-color 0.2s ease;
}
.card:hover{border-color:rgba(0,113,227,0.12)}

.section-title{
  font-size:15px;font-weight:600;color:var(--color-text-primary);
  margin-bottom:var(--space-lg);
  display:flex;align-items:center;gap:var(--space-sm);
}

/* ====== Buttons ====== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 18px;border-radius:var(--radius-full);
  font-size:13px;font-weight:500;cursor:pointer;
  border:none;font-family:inherit;
  transition:all 0.18s ease;white-space:nowrap;
  -webkit-tap-highlight-color:transparent;
}
.btn:active{transform:scale(0.97)}
.btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 1px 3px rgba(0,113,227,0.2)}
.btn-primary:hover{background:var(--color-primary-hover);box-shadow:var(--shadow-glow-primary)}
.btn-secondary{background:rgba(0,0,0,0.05);color:var(--color-text-primary)}
.btn-secondary:hover{background:rgba(0,0,0,0.08)}
.btn-ghost{background:transparent;color:var(--color-primary);padding:6px 12px}
.btn-ghost:hover{background:var(--color-primary-subtle)}
.btn-ghost:active{background:rgba(0,113,227,0.1)}
.btn-danger{background:transparent;color:var(--color-danger)}
.btn-danger:hover{background:var(--color-danger-subtle)}
.btn-danger-filled{background:var(--color-danger);color:#fff}
.btn-danger-filled:hover{background:#e0352b}
.btn-lg{padding:12px 28px;font-size:15px;font-weight:600;border-radius:var(--radius-xl)}
.btn-import-big{
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  color:#fff;box-shadow:0 4px 16px rgba(0,113,227,0.25);
  transition:all 0.25s ease;
}
.btn-import-big:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(0,113,227,0.35)}
.btn-import-big:active{transform:scale(0.97)}

/* ====== Import Tab Switch ====== */
.import-tab-switch{display:flex;gap:8px;margin-bottom:16px;border-bottom:1px solid var(--color-border);padding-bottom:8px}
.import-tab-switch .btn-ghost{
  padding:8px 16px;border-radius:var(--radius-full);font-size:14px;font-weight:500;
  color:var(--color-text-secondary);background:transparent;
  transition:all 0.18s ease;
}
.import-tab-switch .btn-ghost:hover{background:rgba(0,0,0,0.04);color:var(--color-text-primary)}
.import-tab-switch .btn-ghost.active{background:var(--color-primary-subtle);color:var(--color-primary);font-weight:600}

/* Import drop zone */
.import-drop-zone{
  border:2px dashed var(--color-border);border-radius:var(--radius-lg);
  padding:40px 20px;text-align:center;background:var(--color-surface);
  transition:all 0.2s ease;cursor:pointer;
}
.import-drop-zone:hover{border-color:var(--color-primary);background:var(--color-primary-subtle)}
.import-drop-zone .dz-icon{font-size:36px;margin-bottom:10px}
.import-drop-zone .dz-title{font-size:16px;font-weight:600;color:var(--color-text-primary);margin-bottom:6px}
.import-drop-zone .dz-desc{font-size:13px;color:var(--color-text-secondary);margin-bottom:16px;line-height:1.6}
.import-drop-zone textarea,.import-drop-zone input{
  width:100%;max-width:500px;margin:0 auto;display:block;
  border:1px solid var(--color-border);border-radius:var(--radius);
  padding:12px 16px;font-size:14px;font-family:inherit;outline:none;
  resize:vertical;min-height:100px;background:var(--color-bg);
  transition:border-color 0.2s;
}
.import-drop-zone textarea:focus,.import-drop-zone input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,113,227,0.1)}

/* ====== Toggle Switch (iOS) ====== */
.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.toggle-label{flex:1;min-width:180px}
.toggle-label strong{display:block;font-size:14px;color:var(--color-text-primary);margin-bottom:2px}
.toggle-label span{display:block;font-size:12px;color:var(--color-text-secondary);line-height:1.5}
.switch{position:relative;display:inline-block;width:52px;height:30px;flex-shrink:0;cursor:pointer}
.switch input{opacity:0;width:0;height:0}
.slider{
  position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;
  background-color:#E5E5EA;border-radius:34px;transition:0.25s ease;
}
.slider:before{
  position:absolute;content:"";height:26px;width:26px;left:2px;bottom:2px;
  background-color:#fff;border-radius:50%;transition:0.25s ease;
  box-shadow:0 2px 4px rgba(0,0,0,0.15);
}
.switch input:checked+.slider{background-color:var(--color-success)}
.switch input:checked+.slider:before{transform:translateX(22px)}
.switch input:focus-visible+.slider{box-shadow:0 0 0 3px rgba(0,113,227,0.15)}

/* ====== Sentence Speed Selector ====== */
.speed-selector{
  display:flex;gap:0;border-radius:10px;
  background:rgba(0,0,0,0.04);padding:4px;
}
.speed-option{
  flex:1;text-align:center;padding:10px 0;font-size:14px;
  font-weight:500;font-family:inherit;cursor:pointer;
  border:none;background:transparent;color:var(--color-text-secondary);
  border-radius:8px;transition:all 0.2s;
  -webkit-tap-highlight-color:transparent;
  outline:none;
}
.speed-option:hover{color:var(--color-text-primary)}
.speed-option:active{transform:scale(0.96)}
.speed-option.active{
  background:var(--color-surface);
  color:var(--color-primary);
  font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
}
.speed-option .speed-value{
  font-size:20px;font-weight:700;display:block;line-height:1.2;
}
.speed-option .speed-label{
  font-size:11px;margin-top:2px;font-weight:400;
}

/* ====== Home Page ====== */
.home-container{
  max-width:680px;margin:0 auto;padding:40px 20px 60px;
  animation:fadeUp 0.45s ease;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.home-greeting{font-size:13px;color:var(--color-text-tertiary);margin-bottom:4px;letter-spacing:0.02em}
.home-title{
  font-size:32px;font-weight:700;letter-spacing:-0.5px;margin-bottom:24px;
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}

/* Encouragement module */
.home-encourage{
  background:linear-gradient(135deg,#667eea,#764ba2);
  border:none;color:#fff;padding:20px 24px;
  border-radius:var(--radius-lg);
  display:flex;align-items:center;gap:14px;
  box-shadow:0 4px 16px rgba(102,126,234,0.25);
  margin-bottom:20px;transition:transform 0.2s ease,box-shadow 0.2s ease;
}
.home-encourage:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(102,126,234,0.35)}
.home-encourage .he-icon{font-size:32px;flex-shrink:0}
.home-encourage .he-count{font-size:28px;font-weight:800;letter-spacing:1px}
.home-encourage .he-count span{font-size:15px;font-weight:500;opacity:0.8}
.home-encourage .he-sub{font-size:13px;opacity:0.85}
.home-encourage .he-slogan{font-size:13px;opacity:0.85;margin-top:2px}

.home-stats-row{display:flex;gap:12px;margin-bottom:36px;flex-wrap:wrap}
.home-stat-card{
  flex:1;min-width:140px;
  background:var(--color-surface);border-radius:var(--radius-lg);
  padding:18px 20px;box-shadow:var(--shadow-sm);
  border:1px solid var(--color-border);
  display:flex;flex-direction:column;gap:4px;
  transition:box-shadow 0.2s ease,border-color 0.2s ease;
}
.home-stat-card:hover{border-color:rgba(0,113,227,0.12);box-shadow:var(--shadow-md)}
.home-stat-num{font-size:28px;font-weight:700;color:var(--color-text-primary);letter-spacing:-0.5px}
.home-stat-label{font-size:12px;color:var(--color-text-tertiary)}
.home-section-label{
  font-size:13px;font-weight:600;color:var(--color-text-secondary);
  margin-bottom:16px;letter-spacing:0.03em;text-transform:uppercase;
}
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(80px,1fr));gap:20px}
.home-app{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  cursor:pointer;transition:transform 0.2s ease;
  -webkit-tap-highlight-color:transparent;
}
.home-app:active{transform:scale(0.92)}
.home-app-icon{
  width:64px;height:64px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:28px;box-shadow:0 2px 12px rgba(0,0,0,0.1);
  transition:box-shadow 0.2s ease,transform 0.2s ease;
  position:relative;
}
.home-app:hover .home-app-icon{box-shadow:0 4px 20px rgba(0,0,0,0.15);transform:translateY(-2px)}
.home-app-badge{
  position:absolute;top:-4px;right:-4px;
  min-width:18px;height:18px;
  background:var(--color-danger);color:#fff;
  font-size:10px;font-weight:700;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  padding:0 5px;border:2px solid var(--color-bg);
}
.home-app-name{font-size:11px;color:var(--color-text-secondary);text-align:center;line-height:1.3;max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Continue learning card */
.home-continue-card{cursor:pointer;transition:all 0.2s ease}
.home-continue-card:hover{border-color:rgba(0,113,227,0.15);box-shadow:var(--shadow-md)}

/* ====== Chapter Grid ====== */
.root-chapter-card{
  background:var(--color-surface);border-radius:var(--radius-lg);
  padding:18px 22px;cursor:pointer;
  border:1px solid var(--color-border);
  transition:all 0.2s ease;position:relative;
}
.root-chapter-card:hover{border-color:rgba(94,92,230,0.2);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.root-chapter-card .rcc-name{font-size:16px;font-weight:600;color:var(--color-primary)}
.root-chapter-card .rcc-count{font-size:12px;color:var(--color-text-secondary)}

/* ====== Word Management List ====== */
.word-mgmt-list{display:flex;flex-direction:column;gap:6px}
.word-mgmt-row{
  display:flex;align-items:center;gap:12px;
  padding:10px 16px;border-radius:var(--radius-sm);
  background:var(--color-surface);border:1px solid var(--color-border);
  transition:background 0.15s ease,border-color 0.15s ease;
}
.word-mgmt-row:hover{background:var(--color-primary-subtle);border-color:rgba(0,113,227,0.12)}
.word-mgmt-row.mastered{background:var(--color-success-subtle);border-color:rgba(52,199,89,0.15)}
.word-mgmt-row.batch-mode{padding-left:46px;position:relative;cursor:pointer}
.word-mgmt-row.batch-selected{border-color:var(--color-primary);background:rgba(0,113,227,0.06);box-shadow:0 0 0 2px rgba(0,113,227,0.15)}
.word-checkbox{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;cursor:pointer;accent-color:var(--color-primary)}
.wm-en{font-weight:600;min-width:110px;font-size:14px;color:var(--color-text-primary)}
.wm-cn{color:var(--color-text-secondary);flex:1;font-size:13px}
.wm-phonetic{font-size:12px;color:var(--color-text-tertiary);min-width:80px;text-align:right}
.wm-status{font-size:14px}

/* ====== Import ====== */
.import-container{max-width:800px;margin:0 auto}
.import-textarea{
  width:100%;min-height:200px;border-radius:var(--radius);
  border:2px solid var(--color-border);padding:16px;
  font-family:'SF Mono','SFMono-Regular','Cascadia Code','Consolas',monospace;
  font-size:14px;resize:vertical;outline:none;line-height:1.8;
  background:var(--color-surface);color:var(--color-text-primary);
  transition:border-color 0.2s ease,box-shadow 0.2s ease;
}
.import-textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,113,227,0.12)}
.import-textarea::placeholder{color:var(--color-text-tertiary)}
.import-hint{font-size:12px;color:var(--color-text-tertiary);margin-top:8px}

.word-preview-list{max-height:400px;overflow-y:auto;border-radius:var(--radius-sm)}
.preview-item{
  padding:12px 16px;border-radius:var(--radius-sm);
  margin-bottom:6px;border:1px solid var(--color-border);
  font-size:13px;display:flex;align-items:center;gap:12px;
  transition:all 0.2s ease;background:var(--color-surface);
}
.preview-item .pi-status{font-size:14px;flex-shrink:0}
.preview-item .pi-en{font-weight:600;min-width:100px;color:var(--color-text-primary)}
.preview-item .pi-cn{color:var(--color-text-secondary);flex:1}
.preview-item .pi-info{font-size:11px;color:var(--color-text-tertiary);margin-left:auto}
.preview-item.processing{background:var(--color-primary-subtle);border-color:rgba(0,113,227,0.2)}
.preview-item.done{background:var(--color-success-subtle);border-color:rgba(52,199,89,0.2)}
.preview-item.failed{background:var(--color-danger-subtle);border-color:rgba(255,59,48,0.2)}

/* ====== AI Banner ====== */
.ai-banner{
  background:linear-gradient(135deg,#667eea,#764ba2);
  border-radius:var(--radius-lg);padding:20px 24px;color:#fff;margin-bottom:20px;
}
.ai-banner h4{font-size:16px;font-weight:600;margin-bottom:4px}
.ai-banner p{font-size:12px;opacity:0.85;line-height:1.6}

/* ====== Inline Input ====== */
.inline-input{
  padding:8px 14px;border-radius:var(--radius-full);
  border:1px solid var(--color-border);
  font-size:13px;font-family:inherit;outline:none;
  background:var(--color-surface);color:var(--color-text-primary);
  transition:border-color 0.2s ease,box-shadow 0.2s ease;
}
.inline-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,113,227,0.12)}
.inline-input::placeholder{color:var(--color-text-tertiary)}

/* ====== Learning View ====== */
.learn-layout{max-width:640px;margin:0 auto}
.learn-progress{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.learn-progress-bar{flex:1;height:6px;background:#E8E8ED;border-radius:3px;overflow:hidden}
.learn-progress-fill{
  height:100%;border-radius:3px;transition:width 0.4s ease;
  background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));
}
.learn-progress-text{font-size:13px;font-weight:600;color:var(--color-text-secondary);min-width:90px;text-align:right}

/* Word display card */
.word-display{
  text-align:center;padding:40px 20px 28px;
  background:var(--color-surface);border-radius:var(--radius-xl);
  box-shadow:var(--shadow-md);border:1px solid var(--color-border);
  margin-bottom:20px;transition:box-shadow 0.25s ease;
}
.word-display:hover{box-shadow:var(--shadow-lg)}
.word-display .wd-en{
  font-size:44px;font-weight:700;letter-spacing:1.5px;margin-bottom:6px;
  background:linear-gradient(135deg,var(--color-text-primary),#3A3A3C);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.word-display .wd-phonetic{font-size:15px;color:var(--color-text-secondary);margin-bottom:8px}
.word-display .wd-cn{font-size:16px;font-weight:500;color:var(--color-text-primary)}
.word-display .wd-root{
  display:inline-block;margin-top:14px;padding:6px 16px;
  background:var(--color-primary-subtle);border-radius:var(--radius-full);
  font-size:13px;color:var(--color-primary);font-weight:500;
}
.word-display .wd-root-label{font-size:13px;color:var(--color-text-tertiary);margin-top:10px;margin-bottom:2px}

/* Word note (方案B: left yellow bar + gray bg) */
.word-display .wd-note{
  margin-top:14px;padding:10px 14px;
  background:var(--color-bg-secondary,#F5F5F7);border-left:3px solid #F0C040;
  border-radius:6px;text-align:left;cursor:pointer;position:relative;
  transition:background 0.15s,border-color 0.15s;
}
.word-display .wd-note:hover{
  background:#EEEDE8;border-color:#E8C840;
}
.word-display .wd-note-text{
  font-size:13px;color:var(--color-text-secondary);line-height:1.7;
}
.word-display .wd-note-hint{
  display:none;font-size:11px;color:var(--color-text-tertiary);margin-top:4px;
}
.word-display .wd-note:hover .wd-note-hint{
  display:block;
}
/* Empty note placeholder */
.word-display .wd-note-empty{
  background:transparent;border-left:3px dashed #D1CFC4;
  padding:8px 14px;
}
.word-display .wd-note-empty:hover{
  background:#F5F5F7;border-color:#C0B890;
}
.word-display .wd-note-add-hint{
  font-size:12px;color:var(--color-text-tertiary);
}
.word-display .wd-note-empty:hover .wd-note-add-hint{
  color:var(--color-text-secondary);
}
.word-display .wd-note-input{
  width:100%;border:1px solid #D1CFC4;border-radius:4px;padding:8px 10px;
  font-size:13px;line-height:1.6;color:var(--color-text-primary);
  background:#fff;resize:vertical;font-family:inherit;outline:none;box-sizing:border-box;
}
.word-display .wd-note-input:focus{
  border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,113,227,0.1);
}
.word-display .wd-note-actions{
  display:flex;align-items:center;justify-content:flex-end;margin-top:6px;
}
.word-display .wd-note-action-hint{
  font-size:11px;color:var(--color-text-tertiary);
}
.word-display .wd-sentence{
  margin-top:16px;padding:12px 18px;
  background:var(--color-warning-subtle);border-radius:var(--radius);
  font-size:15px;color:var(--color-text-primary);font-weight:500;
  line-height:1.8;font-style:italic;text-align:left;
  cursor:pointer;transition:background 0.15s ease;
}
.word-display .wd-sentence:hover{background:rgba(255,159,10,0.12)}

/* Speak button */
.speak-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin:8px 0 24px;min-height:80px;width:100%;
}
.speak-row-left{display:flex;align-items:center;gap:14px;flex-wrap:nowrap}
.speak-row-left .action-btn{
  width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;padding:0;flex-shrink:0;
  color:var(--color-text-secondary);
  background:linear-gradient(180deg, #FFFFFF 0%, var(--color-surface) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.9),
    inset 0 -1px 0 rgba(0,0,0,0.04),
    0 1px 2px rgba(0,0,0,0.06),
    0 2px 6px rgba(0,0,0,0.05);
  transition:transform .15s ease, box-shadow .15s ease;
}
.speak-row-left .action-btn:hover{
  transform:translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.9),
    0 2px 4px rgba(0,0,0,0.08),
    0 4px 10px rgba(0,0,0,0.08);
}
.speak-row-left .action-btn:active{
  transform:translateY(1px);
  box-shadow:
    inset 0 1px 2px rgba(0,0,0,0.06),
    0 1px 2px rgba(0,0,0,0.04);
}
.speak-row-left .action-btn--danger{color:var(--color-danger)}
.speak-row-left .action-btn--danger:hover{background:linear-gradient(180deg, #FFFFFF 0%, var(--color-danger-subtle) 100%)}
.speak-row-center{display:flex;align-items:center;justify-content:center;flex:1}
.speak-row-right{display:flex;align-items:center;gap:14px;flex-wrap:nowrap}
.speak-row .speak-btn{
  width:64px;height:64px;border-radius:50%;
  background:var(--color-primary);color:#fff;border:none;
  font-size:26px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all 0.2s ease;flex-shrink:0;
  box-shadow:var(--shadow-glow-primary);
}
.speak-row .speak-btn:hover{transform:scale(1.06);box-shadow:0 6px 28px rgba(0,113,227,0.35)}
.speak-row .speak-btn:active{transform:scale(0.94)}
.speak-row .speak-btn.speaking{background:var(--color-warning);box-shadow:0 4px 20px rgba(255,159,10,0.35);animation:pulse 0.8s infinite}
@keyframes pulse{
  0%,100%{box-shadow:0 4px 20px rgba(255,159,10,0.35)}
  50%{box-shadow:0 4px 36px rgba(255,159,10,0.6)}
}

/* Typing rounds */
.typing-rounds{display:flex;flex-direction:column;gap:10px}
.typing-row{
  display:flex;align-items:center;gap:12px;
  padding:12px 18px;border-radius:var(--radius);
  background:var(--color-surface);border:2px solid var(--color-border);
  transition:all 0.2s ease;
}
.typing-row.active{border-color:var(--color-primary);box-shadow:0 2px 14px rgba(0,113,227,0.1)}
.typing-row.done{border-color:var(--color-success);background:var(--color-success-subtle)}
.typing-row.wrong{border-color:var(--color-danger);background:var(--color-danger-subtle)}
.typing-row .tr-label{font-size:12px;font-weight:600;color:var(--color-text-tertiary);min-width:44px}
.typing-row.done .tr-label{color:var(--color-success)}
.typing-row.wrong .tr-label{color:var(--color-danger)}
.typing-row input{
  flex:1;border:none;background:transparent;
  font-size:22px;font-family:inherit;font-weight:500;
  outline:none;color:var(--color-text-primary);letter-spacing:1px;
}
.typing-row input::placeholder{color:var(--color-text-tertiary);font-weight:400}
.typing-row .tr-check{font-size:18px;display:none}
.typing-row.done .tr-check,.typing-row.wrong .tr-check{display:inline}
.learn-actions{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}

/* ====== Complete Section ====== */
.complete-section{text-align:center;padding:40px 20px;animation:fadeUp 0.4s ease}
.complete-section .ce-emoji{font-size:64px;margin-bottom:16px}
.complete-section .ce-title{font-size:28px;font-weight:700;color:var(--color-text-primary);margin-bottom:8px}
.complete-section .ce-stats{font-size:15px;color:var(--color-text-secondary);margin-bottom:28px;line-height:1.6}
.complete-section .ce-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ====== Root Display ====== */
.root-display{
  text-align:center;padding:32px 20px 24px;
  background:var(--color-surface);border-radius:var(--radius-xl);
  box-shadow:var(--shadow-md);border:1px solid var(--color-border);
  margin-bottom:20px;transition:box-shadow 0.25s ease;
}
.root-display:hover{box-shadow:var(--shadow-lg)}
.root-display .rd-root{
  font-size:38px;font-weight:700;letter-spacing:1px;margin-bottom:6px;
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.root-display .rd-explain{
  font-size:14px;color:var(--color-text-secondary);line-height:1.8;
  text-align:left;padding:12px 16px;
  background:var(--color-primary-subtle);border-radius:var(--radius);
  margin-top:12px;
}

/* Root pronunciation clickable */
.root-display .rd-root--clickable{
  cursor:pointer; user-select:none;
  transition:transform 0.15s ease, opacity 0.15s ease;
}
.root-display .rd-root--clickable:hover{
  transform:scale(1.03); opacity:0.85;
}
.root-display .rd-root--clickable:active{
  transform:scale(0.97);
}
.root-display .rd-root-hint{
  display:inline-block; font-size:11px; font-weight:400;
  color:var(--color-text-tertiary); margin-top:4px;
  letter-spacing:0; -webkit-text-fill-color:var(--color-text-tertiary);
  background:none;
}

/* Sticky root banner */
.root-sticky-banner{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,0.82);
  backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  padding:10px 16px;
  margin-bottom:16px;
  display:flex; align-items:center; gap:10px;
  cursor:pointer;
  box-shadow:0 2px 12px rgba(0,0,0,0.06);
  opacity:0; transform:translateY(-10px);
  pointer-events:none;
  transition:opacity 0.25s ease, transform 0.25s ease, box-shadow 0.2s ease;
}
.root-sticky-banner.visible{
  opacity:1; transform:translateY(0); pointer-events:auto;
}
.root-sticky-banner:hover{
  box-shadow:0 4px 20px rgba(0,0,0,0.10);
}
.root-sticky-banner .rsb-icon{
  font-size:20px; flex-shrink:0;
}
.root-sticky-banner .rsb-content{
  flex:1; min-width:0;
}
.root-sticky-banner .rsb-root{
  font-size:14px; font-weight:700;
  background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.root-sticky-banner .rsb-explain{
  font-size:12px; color:var(--color-text-secondary);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.root-sticky-banner .rsb-expand{
  font-size:12px; color:var(--color-primary); flex-shrink:0;
  white-space:nowrap;
}

/* Sticky banner popover */
.rsb-popover{
  position:absolute;
  top:calc(100% + 8px); left:16px; right:16px;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius);
  padding:14px 16px;
  box-shadow:var(--shadow-lg);
  font-size:13px; line-height:1.7;
  color:var(--color-text-secondary);
  display:none;
  z-index:60;
  white-space:normal;
  cursor:default;
}
.rsb-popover.open{ display:block; }
.rsb-popover .rsbp-title{
  font-size:13px; font-weight:600; color:var(--color-text-primary);
  margin-bottom:6px;
}
.rsb-popover .rsbp-close{
  position:absolute; top:8px; right:12px;
  font-size:14px; color:var(--color-text-secondary);
  cursor:pointer; background:none; border:none; padding:4px;
}

/* ====== Root Cards ====== */
.root-card{
  background:var(--color-surface);border-radius:var(--radius-lg);
  padding:20px 24px;cursor:pointer;
  border:1px solid var(--color-border);
  transition:all 0.2s ease;position:relative;overflow:hidden;
}
.root-card:hover{border-color:rgba(0,113,227,0.2);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.root-card .rc-root{font-size:18px;font-weight:700;margin-bottom:4px;color:var(--color-primary)}
.root-card .rc-words{font-size:12px;color:var(--color-text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.root-card .rc-pct{position:absolute;top:20px;right:24px;font-size:13px;font-weight:600;color:var(--color-success)}
.root-card .rc-pct.zero{color:var(--color-text-tertiary)}
.root-card .ch-del-btn{position:absolute;top:10px;right:12px;background:none;border:none;font-size:14px;cursor:pointer;opacity:0;transition:opacity 0.2s ease;padding:2px 4px}
.root-card:hover .ch-del-btn{opacity:1}
.root-card .root-checkbox{position:absolute;top:18px;left:18px;width:20px;height:20px;cursor:pointer;z-index:3;accent-color:var(--color-primary)}
.root-card.batch-mode{padding-left:54px}
.root-card.batch-selected{border-color:var(--color-primary);background:rgba(0,113,227,0.04);box-shadow:0 0 0 2px rgba(0,113,227,0.15)}
.root-batch-toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px;flex-wrap:wrap}
.root-batch-toolbar .batch-info{font-size:13px;color:var(--color-text-secondary);margin-left:auto}

/* Root chapter detail list */
.root-list{display:flex;flex-direction:column;border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;background:var(--color-surface)}
.root-list-row{display:flex;align-items:center;padding:13px 16px;border-bottom:1px solid var(--color-border);cursor:pointer;transition:background .1s;gap:10px}
.root-list-row:last-child{border-bottom:none}
.root-list-row:hover{background:rgba(0,113,227,0.03)}
.root-list-row input[type=checkbox]{margin:0;accent-color:var(--blue);flex-shrink:0}
.rlr-idx{font-size:11px;color:var(--color-text-tertiary);width:22px;text-align:center;flex-shrink:0}
.rlr-root{font-size:15px;font-weight:600;color:var(--color-primary);min-width:80px;flex-shrink:0;cursor:pointer}
.rlr-root:hover{text-decoration:underline}
.rlr-expl{font-size:12px;color:var(--color-text-secondary);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rlr-words{font-size:11px;color:var(--color-text-tertiary);text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;flex-shrink:0}
.rlr-del{opacity:0;background:none;border:none;font-size:13px;cursor:pointer;padding:2px 4px;flex-shrink:0}
.root-list-row:hover .rlr-del{opacity:1}
.root-list-row.batch-selected{background:rgba(0,113,227,0.04);border-left:3px solid var(--blue)}

/* ====== Root Learn v7 (no typing, all words listed) ====== */
.root-learn-v7{padding:0 16px 24px;max-width:640px;margin:0 auto}
.rl7-progress{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.rl7-progress .learn-progress-bar{flex:1;height:6px;background:var(--color-border);border-radius:3px;overflow:hidden}
.rl7-progress .learn-progress-fill{height:100%;background:var(--color-primary);border-radius:3px;transition:width 0.3s}
.rl7-progress-text{font-size:12px;color:var(--color-text-secondary);white-space:nowrap}
.rl7-header{background:var(--color-surface);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px;border:1px solid var(--color-border);text-align:center}
.rl7-root{font-size:32px;font-weight:700;color:var(--color-primary);cursor:pointer;display:inline-block;margin-bottom:8px;transition:transform 0.15s}
.rl7-root:hover{transform:scale(1.05)}
.rl7-speak-icon{font-size:20px;vertical-align:middle}
.rl7-explain{font-size:13px;color:var(--color-text-secondary);line-height:1.7;text-align:left;margin-top:8px}
.rl7-words-label{font-size:14px;font-weight:600;color:var(--color-text);margin-bottom:10px;padding-left:4px}
.rl7-words{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.rw-card{background:var(--color-surface);border-radius:var(--radius);padding:14px 16px;border:1px solid var(--color-border);cursor:pointer;transition:all 0.15s}
.rw-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-sm)}
.rw-card:active{transform:scale(0.985)}
.rw-word-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}
.rw-en{font-size:17px;font-weight:600;color:var(--color-text)}
.rw-speak-hint{font-size:14px;opacity:0.4;transition:opacity 0.15s}
.rw-card:hover .rw-speak-hint{opacity:1}
.rw-cn{font-size:14px;color:#c43e3e;margin-bottom:4px}
.rw-root{font-size:12px;color:var(--color-primary);font-style:italic}
.rw-phonetic{font-size:11px;color:var(--color-text-tertiary);margin-top:2px}
.rl7-nav{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.rl7-pos{font-size:13px;color:var(--color-text-secondary)}
.rl7-mastery-inline{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:14px}
.rl7-mastery-inline .mastery-dot{width:32px !important;height:32px !important;border-radius:50%}
.rl7-footer{display:flex;gap:8px;justify-content:center}
@media(max-width:768px){
  .rl7-root{font-size:26px}
  .rl7-header{padding:18px}
  .rw-en{font-size:15px}
  .rw-cn{font-size:13px}
}

/* ====== Sentence List ====== */
.sentence-item{
  background:var(--color-surface);border-radius:var(--radius);
  padding:16px 18px;margin-bottom:10px;
  border:1px solid var(--color-border);
  transition:all 0.15s ease;
}
.sentence-item:hover{border-color:rgba(0,113,227,0.12)}
.sentence-item .si-en{font-size:15px;font-weight:500;color:var(--color-text-primary);line-height:1.7;margin-bottom:6px;font-style:italic}
.sentence-item .si-cn{font-size:13px;color:var(--color-text-secondary)}
.sentence-item .si-meta{font-size:11px;color:var(--color-text-tertiary);margin-top:6px}

/* ====== Empty State ====== */
.empty-state{text-align:center;padding:60px 20px}
.empty-state .em-icon{font-size:48px;margin-bottom:12px}
.empty-state .em-text{font-size:16px;color:var(--color-text-secondary);margin-bottom:8px}
.empty-state .em-action{margin-top:16px}

/* ====== Toast ====== */
.toast{
  position:fixed;top:24px;left:50%;transform:translateX(-50%);
  background:rgba(29,29,31,0.92);color:#fff;
  padding:10px 24px;border-radius:var(--radius-full);
  font-size:14px;font-weight:500;z-index:400;
  opacity:0;pointer-events:none;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:opacity 0.3s ease;
  box-shadow:var(--shadow-lg);
}
.toast.show{opacity:1}

/* ====== Shake ====== */
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}
.shake{animation:shake 0.4s ease}

/* ====== Login / Register Pages ====== */
.auth-container{
  max-width:420px;margin:60px auto 0;padding:0 20px;
  animation:fadeUp 0.4s ease;
}
.auth-card{
  background:var(--color-surface);border-radius:var(--radius-xl);
  padding:36px 32px;box-shadow:var(--shadow-md);
  border:1px solid var(--color-border);
}
.auth-card h1{font-size:24px;font-weight:700;text-align:center;margin-bottom:8px;color:var(--color-text-primary)}
.auth-card .subtitle{font-size:13px;color:var(--color-text-tertiary);text-align:center;margin-bottom:28px}
.auth-field{margin-bottom:18px}
.auth-field label{display:block;font-size:13px;font-weight:600;color:var(--color-text-primary);margin-bottom:6px}
.auth-field input{
  width:100%;padding:12px 16px;border-radius:var(--radius-sm);
  border:1px solid var(--color-border);font-size:15px;
  font-family:inherit;background:var(--color-surface);
  color:var(--color-text-primary);outline:none;
  transition:border-color 0.2s ease,box-shadow 0.2s ease;
}
.auth-field input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(0,113,227,0.12)}
.auth-field input::placeholder{color:var(--color-text-tertiary)}
.auth-btn{width:100%;padding:14px;font-size:16px;font-weight:600;border-radius:var(--radius-full);margin-top:8px}
.auth-link{text-align:center;margin-top:18px;font-size:13px;color:var(--color-text-secondary)}
.auth-link a{color:var(--color-primary);text-decoration:none;font-weight:500}
.auth-link a:hover{text-decoration:underline}

/* ====== Settings Page ====== */
.settings-container{max-width:560px;margin:0 auto}
.settings-card{
  background:var(--color-surface);border-radius:var(--radius-lg);
  padding:24px;margin-bottom:16px;
  border:1px solid var(--color-border);box-shadow:var(--shadow-sm);
}
.settings-card h3{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--color-text-primary)}
.settings-row{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:10px 0;
}
.settings-row+.settings-row{border-top:1px solid var(--color-border)}
.settings-label{font-size:14px;color:var(--color-text-primary)}
.settings-desc{font-size:12px;color:var(--color-text-tertiary);margin-top:2px}
.settings-status{
  padding:10px 16px;border-radius:var(--radius-sm);
  font-size:13px;font-weight:500;margin-top:14px;display:none;
}
.settings-status.success{background:var(--color-success-subtle);color:var(--color-success)}
.settings-status.error{background:var(--color-danger-subtle);color:var(--color-danger)}

/* ====== Modal ====== */
.modal-backdrop{
  position:fixed;inset:0;z-index:300;
  background:var(--color-overlay);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  display:flex;align-items:center;justify-content:center;
  animation:fadeIn 0.2s ease;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-panel{
  background:var(--color-surface);border-radius:var(--radius-xl);
  padding:32px;width:420px;max-width:90vw;
  box-shadow:var(--shadow-lg);
  animation:modalIn 0.25s ease;
}
@keyframes modalIn{from{opacity:0;transform:scale(0.95)}to{opacity:1;transform:scale(1)}}
.modal-panel h3{font-size:18px;font-weight:600;text-align:center;margin-bottom:8px;color:var(--color-text-primary)}
.modal-panel .modal-desc{font-size:14px;color:var(--color-text-secondary);text-align:center;margin-bottom:20px;line-height:1.6}
.modal-panel .modal-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ====== Mobile Bottom Navigation ====== */
.mobile-bottom-nav{
  display:none;
  position:fixed;bottom:0;left:0;right:0;z-index:1000;
  height:64px;padding:0 4px;padding-bottom:env(safe-area-inset-bottom,0px);
  background:rgba(255,255,255,0.95);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-top:1px solid rgba(0,0,0,0.08);
  justify-content:space-around;align-items:center;
}
.mobile-nav-item{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:4px 8px;border:none;background:none;cursor:pointer;
  font-family:inherit;font-size:10px;color:var(--color-text-tertiary);
  transition:color 0.18s ease;min-width:56px;
  -webkit-tap-highlight-color:transparent;
  border-radius:10px;padding-top:6px;padding-bottom:4px;
}
.mobile-nav-item.active{color:var(--color-primary)}
.mobile-nav-item .mni-icon{font-size:22px;line-height:1}
.mobile-nav-item .mni-label{font-size:10px;font-weight:500}

/* ====== Mobile More Sheet ====== */
.mobile-more-sheet{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:1001;
  background:rgba(255,255,255,0.98);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-top:1px solid var(--color-border);
  border-radius:20px 20px 0 0;
  padding:12px 16px calc(20px + env(safe-area-inset-bottom,0px));
  box-shadow:0 -8px 32px rgba(0,0,0,0.1);
  animation:slideUp 0.25s ease;
}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.mobile-more-sheet.show{display:block}
.mobile-more-overlay{
  display:none;position:fixed;inset:0;z-index:1000;
  background:rgba(0,0,0,0.3);
}
.mobile-more-overlay.show{display:block}
.mobile-more-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:16px;padding:4px 4px 8px;
  border-bottom:1px solid var(--color-border);
}
.mobile-more-header span{font-size:15px;font-weight:600;color:var(--color-text-primary)}
.mobile-more-close{
  width:30px;height:30px;border-radius:50%;border:none;
  background:rgba(0,0,0,0.06);color:var(--color-text-secondary);
  font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.mobile-more-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
}
.mobile-more-item{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:14px 8px;border-radius:14px;border:none;background:none;
  cursor:pointer;font-family:inherit;
  transition:background 0.15s ease;
  -webkit-tap-highlight-color:transparent;
}
.mobile-more-item:active{background:rgba(0,0,0,0.05)}
.mobile-more-item .mobile-more-icon{
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;
}
.mobile-more-item .mobile-more-label{font-size:11px;color:var(--color-text-secondary);font-weight:500}

/* ====== Sync msg (settings page) ====== */
#syncStatus{
  margin-top:12px;padding:10px 16px;border-radius:var(--radius-sm);
  font-size:13px;font-weight:500;display:none;
}
#syncStatus.success{background:var(--color-success-subtle);color:var(--color-success)}
#syncStatus.error{background:var(--color-danger-subtle);color:var(--color-danger)}

/* ====== CORS Warning ====== */
#corsWarning{z-index:9999}

/* ====== Accessibility ====== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important}
}

/* ======================== MOBILE RESPONSIVE ======================== */
@media(max-width:768px){
  :root{--sidebar-w:0px;--radius-lg:12px}
  body{flex-direction:column;overflow-x:hidden}

  .sidebar{display:none!important}
  .mobile-bottom-nav{display:flex}

  .main{height:calc(100dvh - 64px);width:100%}
  .topbar{height:48px;padding:0 14px}
  .topbar-title{font-size:15px}
  .content{padding:12px 14px 80px}
  .content::-webkit-scrollbar{width:0}

  .card{padding:16px;margin-bottom:12px;border-radius:var(--radius-lg)}

  /* Home */
  .home-container{padding:12px 0 20px;max-width:100%}
  .home-title{font-size:24px;margin-bottom:20px}
  .home-encourage{padding:16px 18px;gap:10px}
  .home-encourage .he-icon{font-size:28px}
  .home-encourage .he-count{font-size:24px}
  .home-stats-row{flex-direction:row;flex-wrap:wrap;gap:8px}
  .home-stat-card{flex:1 1 calc(50% - 8px);min-width:0;padding:14px 16px}
  .home-stat-num{font-size:24px}
  .home-grid{grid-template-columns:repeat(auto-fit,minmax(64px,1fr));gap:12px;max-width:100%}
  .home-app-icon{width:56px;height:56px;font-size:24px;border-radius:14px}
  .home-app-name{font-size:10px}
  .home-section-label{margin-top:24px}

  /* Chapter grid */
  .chapter-grid{grid-template-columns:1fr;gap:10px}
  .chapter-card{padding:16px 20px}
  .chapter-card .ch-name{font-size:15px}
  .chapter-card .ch-pct{top:16px;right:20px}

  /* Word management */
  .word-mgmt-row{flex-wrap:wrap;gap:6px;padding:12px 14px}
  .word-mgmt-row.batch-mode{padding-left:42px}
  .word-checkbox{left:12px;width:20px;height:20px}
  .wm-en{min-width:auto;flex:1;font-size:14px}
  .wm-cn{font-size:12px;width:100%;order:3}
  .wm-phonetic{font-size:11px;min-width:auto}

  /* Learning view */
  .learn-layout{max-width:100%;padding:0}
  .word-display{padding:28px 16px 20px;margin-bottom:16px;border-radius:var(--radius-lg)}
  .word-display .wd-en{font-size:36px;letter-spacing:1px}
  .word-display .wd-phonetic{font-size:14px}
  .word-display .wd-cn{font-size:15px}
  .word-display .wd-note-text{font-size:12px}
  .word-display .wd-note{padding:8px 10px;margin-top:12px}
  .word-display .wd-note-add-hint{font-size:11px}
  .learn-progress{margin-bottom:16px}
  .typing-row input{font-size:18px}

  /* Root display */
  .root-display{padding:24px 16px 20px}
  .root-display .rd-root{font-size:32px}
  .root-card{padding:16px 18px}
  .root-sticky-banner{padding:8px 12px;border-radius:var(--radius)}
  .root-sticky-banner .rsb-root{font-size:13px}
  .root-sticky-banner .rsb-explain{font-size:11px}
  .rsb-popover{left:8px;right:8px}

  /* Import */
  .import-container{padding:0}
  .import-textarea{min-height:140px;font-size:14px}

  /* Buttons */
  .btn{padding:10px 20px;font-size:14px;border-radius:var(--radius-full);min-height:44px}
  .btn-lg{padding:12px 28px;font-size:15px}
  .topbar-actions .btn{padding:6px 12px;font-size:12px;min-height:32px}

  /* Inputs */
  input,select,textarea{font-size:16px!important}
  input[type="text"],input[type="password"]{padding:12px 14px!important}
  .inline-input{padding:10px 16px;font-size:15px}

  /* Tables */
  table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}

  /* Complete */
  .complete-section{padding:32px 16px}
  .complete-section .ce-emoji{font-size:56px}
  .complete-section .ce-title{font-size:24px}

  /* Modal */
  .modal-panel{padding:24px 20px;width:calc(100% - 32px)}
  .modal-panel .modal-actions{flex-direction:column}

  /* Auth */
  .auth-card{padding:28px 24px}

  /* Settings */
  .settings-container{max-width:100%!important}
  .settings-card{padding:16px}

  /* Progress text */
  .learn-progress-text{font-size:12px;min-width:70px}
}

/* ====== Chapter & Detail Views ====== */
.toolbar{display:flex;align-items:center;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.ch-progress-bar{height:4px;background:#E8E8ED;border-radius:2px;overflow:hidden}
.ch-progress-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:2px;transition:width .4s ease}
.wm-idx{color:var(--color-text-tertiary);width:24px;text-align:center;flex-shrink:0;font-size:12px}
.small{font-size:13px}.text-secondary{color:var(--color-text-secondary)}
.chapter-grid,.grid-auto{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.chapter-card{display:flex;flex-direction:column;gap:12px;cursor:pointer;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px 24px;transition:all .2s ease}
.chapter-card:hover{border-color:rgba(0,113,227,0.2);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.chapter-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.chapter-title{font-size:17px;font-weight:600;color:var(--color-text-primary)}
.chapter-meta{font-size:13px;color:var(--color-text-secondary);margin-top:2px}
.chapter-actions{display:flex;gap:4px;opacity:0;transition:opacity .18s}
.chapter-card:hover .chapter-actions,.card:hover .chapter-actions{opacity:1}
.chapter-progress-text{font-size:12px;color:var(--color-text-tertiary);text-align:right;margin-top:4px}
.progress-track{height:6px;background:#E8E8ED;border-radius:3px;overflow:hidden}
.progress-track-sm{height:4px;border-radius:2px}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:3px;transition:width .4s ease}

/* Page header */
.page-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.page-header-left{display:flex;align-items:center;gap:12px}
.page-header-right{display:flex;gap:8px;align-items:center}
.back-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--color-border);background:var(--color-surface);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;transition:.18s;color:var(--color-text-secondary);flex-shrink:0}
.back-btn:hover{background:var(--color-primary-subtle);border-color:rgba(0,113,227,0.2);color:var(--color-primary)}

/* Detail view */
.detail-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.detail-stats{display:flex;gap:16px}
.detail-stat{font-size:13px;color:var(--color-text-secondary)}
.detail-stat strong{color:var(--color-text-primary)}
.word-list{display:flex;flex-direction:column;gap:8px}
.word-list-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);transition:.18s;position:relative}
.word-list-item:hover{border-color:rgba(0,113,227,0.2);transform:translateX(2px)}
.word-list-item.batch-mode{padding-left:46px;cursor:pointer}
.word-list-item.batch-selected{border-color:var(--color-primary);background:rgba(0,113,227,0.06);box-shadow:0 0 0 2px rgba(0,113,227,0.15)}

.pagination{display:flex;justify-content:space-between;align-items:center;margin-top:16px;padding:10px 0}
.pagination-info{font-size:13px;color:var(--color-text-secondary)}
.chapter-card.batch-mode{padding-left:46px;position:relative;cursor:pointer}
.chapter-card.batch-selected{border-color:var(--color-primary)!important;background:rgba(0,113,227,0.04)!important;box-shadow:0 0 0 2px rgba(0,113,227,0.15)!important}
.word-en{font-size:16px;font-weight:600;color:var(--color-text-primary);letter-spacing:0.5px}
.word-cn{font-size:14px;color:var(--color-text-secondary)}

/* Badges */
.badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:10px;font-size:11px;font-weight:500;flex-shrink:0}
.badge-status{background:var(--color-primary-subtle);color:var(--color-primary)}
.badge-success{background:var(--color-success-subtle);color:var(--color-success)}
.badge-warning{background:var(--color-warning-subtle);color:var(--color-warning)}

/* Mobile chapter overrides */
@media(max-width:768px){
  .chapter-grid,.grid-auto{grid-template-columns:1fr;gap:10px}
  .chapter-card{padding:16px 20px}
  .chapter-title{font-size:15px}
  .word-en{font-size:15px}
  .word-cn{font-size:13px}

  /* Chapter detail page - mobile optimization */
  .page-header{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:16px}
  .page-header-left{width:100%}
  .page-header-right{width:100%;display:flex;gap:8px}
  .page-header-right .btn-primary{flex:1;text-align:center;padding:10px 16px;font-size:15px}
  .page-header-right .btn-danger{flex-shrink:0;font-size:13px;white-space:nowrap}

  /* Action button row - mobile compact */
  .detail-header + div[style*="display:flex"]{
    gap:6px !important;margin-bottom:12px !important
  }
  .detail-header + div[style*="display:flex"] .btn{
    font-size:12px !important;padding:7px 10px !important
  }

  /* Chapter toolbar: 4 buttons in 1 row */
  .chapter-toolbar{
    flex-wrap:nowrap !important;gap:4px !important;overflow-x:auto
  }
  .chapter-toolbar .btn{
    font-size:11px !important;padding:7px 9px !important;white-space:nowrap;flex-shrink:0
  }
  .chapter-toolbar .btn-secondary{font-size:12px !important;padding:7px 10px !important}

  /* Stats - compact card style */
  .detail-header{margin-bottom:12px}
  .detail-stats{
    display:flex;width:100%;gap:0;background:var(--color-surface);
    border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden
  }
  .detail-stat{
    flex:1;text-align:center;padding:10px 4px;border-right:1px solid var(--color-border);
    font-size:12px;line-height:1.3
  }
  .detail-stat:last-child{border-right:none}
  .detail-stat strong{display:block;font-size:18px;margin-bottom:2px;color:var(--color-text-primary)}

  /* Word list - mobile compact */
  .word-list-item{padding:10px 12px}
  .word-list-item .badge{font-size:10px;padding:2px 8px}
}

/* ====== Learning Page ====== */
/* Mastery 3-state dots (Apple style) */
.mastery-dot{
  width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;
  padding:0;transition:all .18s ease;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,0.05);
  outline:none;
}
.mastery-dot:hover{transform:scale(1.12)}
.mastery-dot:active{transform:scale(0.94)}
.mastery-dot--m0{background:radial-gradient(circle at 30% 30%, #FF8A8A, #FF3B30)}
.mastery-dot--m1{background:radial-gradient(circle at 30% 30%, #FFD66B, #FF9F0A)}
.mastery-dot--m2{background:radial-gradient(circle at 30% 30%, #6EE89A, #34C759)}
.mastery-dot.is-active{box-shadow:0 0 0 4px rgba(0,113,227,0.18), inset 0 0 0 2px rgba(255,255,255,0.6)}
.mastery-dot--m0.is-active{box-shadow:0 0 0 4px rgba(255,59,48,0.22), inset 0 0 0 2px rgba(255,255,255,0.5)}
.mastery-dot--m1.is-active{box-shadow:0 0 0 4px rgba(255,159,10,0.25), inset 0 0 0 2px rgba(255,255,255,0.5)}
.mastery-dot--m2.is-active{box-shadow:0 0 0 4px rgba(52,199,89,0.25), inset 0 0 0 2px rgba(255,255,255,0.5)}

/* Sentence cards (Apple style) */
.sentence-card{
  background:var(--color-warning-subtle);border-radius:var(--radius);
  padding:14px 16px;cursor:pointer;transition:all .15s ease;
  font-style:italic;line-height:1.7;margin-top:10px;
  border:1px solid transparent;
}
.sentence-card:hover{background:rgba(255,159,10,0.15);border-color:rgba(255,159,10,0.3)}
.sentence-meta{display:flex;align-items:center;gap:6px;margin-bottom:6px;font-size:12px;font-style:normal}
.sentence-en{font-size:14px;line-height:1.7;color:var(--color-text-primary);font-style:italic}
.sentence-cn{font-size:12px;color:var(--color-text-secondary);line-height:1.6;margin-top:4px;font-style:normal}
.sentence-src{font-size:11px;color:var(--color-text-tertiary);margin-top:4px;font-style:normal}

/* Mobile: stack speak-row so button doesn't squeeze */
@media(max-width:768px){
  .speak-row{flex-direction:row;gap:8px}
  .speak-row .speak-btn{width:56px;height:56px;font-size:22px}
  .speak-row-left .action-btn{width:32px;height:32px;font-size:14px}
  .speak-row-right{gap:8px}
  .mastery-dot{width:30px;height:30px}
}

/* ===== Utility & Modal Components ===== */
#pageLoading{position:fixed;inset:0;z-index:10000;background:#f5f5f7;display:flex;align-items:center;justify-content:center;font-size:15px;color:#aeaeb2;transition:opacity .3s}
#corsWarning{display:none;background:#ff3b30;color:#fff;text-align:center;padding:10px 16px;font-size:13px;font-weight:500;position:fixed;top:0;left:0;right:0;z-index:9999}
#mobileNav{display:none}
#manualAddModal{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.45);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);align-items:center;justify-content:center}
.man-modal-box{background:var(--card-bg);border-radius:var(--radius-lg);padding:28px 32px;width:440px;max-width:95vw;box-shadow:var(--shadow-lg);position:relative}
.man-modal-title{font-size:17px;font-weight:700;margin-bottom:18px}
.man-modal-fields{display:flex;flex-direction:column;gap:10px;margin-bottom:18px}
.man-modal-label{font-size:12px;color:var(--text-secondary);display:block;margin-bottom:4px}
.man-modal-input{width:100%;font-size:14px;padding:8px 12px}
.man-modal-msg{font-size:13px;margin-bottom:12px;min-height:18px}
.man-modal-actions{display:flex;gap:10px;justify-content:flex-end}
.man-modal-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:20px;cursor:pointer;color:var(--text-tertiary)}

/* ===== Passages (短文朗读) ===== */
.passage-reader{max-width:920px;margin:0 auto}
.passage-reader-title{font-size:22px;font-weight:700;margin:0 0 16px;color:var(--text);line-height:1.3}
.passage-speed-row{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--card-bg);border:1px solid var(--border);border-radius:12px;margin-bottom:20px}
.passage-speed-chip{font-size:13px;padding:6px 14px;border-radius:999px;background:var(--bg-secondary,#f5f5f7);color:var(--text);cursor:pointer;border:1.5px solid transparent;transition:all 0.15s;user-select:none}
.passage-speed-chip:hover{background:rgba(0,113,227,0.08)}
.passage-speed-chip.active{background:var(--blue);color:#fff}
.passage-text-card{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:40px 48px;margin-bottom:16px}
.passage-text{font-size:14px;line-height:1.9;color:var(--text);letter-spacing:0.01em}
.passage-paragraph{margin:0 0 14px 0}
.passage-paragraph:last-child{margin-bottom:0}
.passage-sentence{padding:2px 4px;margin:0 -2px;border-radius:4px;cursor:pointer;transition:background 0.15s,border-bottom-color 0.15s;border-bottom:1.5px solid transparent}
.passage-sentence:hover{background:rgba(0,113,227,0.08)}
.passage-sentence.active{background:rgba(0,113,227,0.14);border-bottom:1.5px solid var(--blue)}
.passage-detail-card{background:var(--card-bg);border:1px solid rgba(0,113,227,0.25);border-radius:14px;padding:20px 22px;margin-top:16px}
.passage-detail-tag{font-size:11px;padding:3px 10px;border-radius:6px;background:rgba(0,113,227,0.1);color:var(--blue);font-weight:600}
.passage-detail-en{font-size:15px;line-height:1.7;color:var(--text);margin:0 0 8px;font-style:italic}
.passage-detail-cn{font-size:13px;line-height:1.7;color:var(--text-secondary);margin:0 0 14px}
.passage-note-area{width:100%;min-height:64px;padding:10px 14px;font-size:13px;line-height:1.6;border:1px solid var(--border);border-radius:8px;resize:vertical;font-family:inherit;background:var(--bg-secondary,#fafafa);box-sizing:border-box;color:var(--text);transition:border-color 0.15s,background 0.15s}
.passage-note-area:focus{outline:none;border-color:var(--blue);background:var(--card-bg)}
.passage-list{display:flex;flex-direction:column;gap:0}
.passage-item{transition:transform 0.15s,box-shadow 0.15s}
.passage-item:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,0.06)}

/* ===== Multi-engine TTS selector ===== */
.engine-card{padding:14px 12px;border:1.5px solid var(--border);border-radius:12px;cursor:pointer;text-align:center;transition:all 0.15s;background:var(--card-bg)}
.engine-card:hover{border-color:var(--blue);background:rgba(0,113,227,0.04)}
.engine-card-active{border-color:var(--blue);background:rgba(0,113,227,0.08);box-shadow:0 0 0 3px rgba(0,113,227,0.1)}

/* ===== Ebbinghaus Schedule ===== */
.eb-wrap{padding:0 4px}
.eb-tips{background:#f0f9ff;border-left:4px solid #4aa3df;padding:12px 16px;margin-bottom:16px;border-radius:6px;font-size:13px;line-height:1.7;color:#15527a}
.eb-tips strong{color:#0f3c5a}
.eb-table{width:100%;border-collapse:collapse;font-size:13px;table-layout:fixed}
.eb-table th,.eb-table td{border:1px solid #b8d0e8;padding:6px 4px;text-align:center;vertical-align:middle}
.eb-table th{background:#d9edf7;color:#1a3c5a;font-weight:bold;font-size:13px;line-height:1.4}
.eb-table td{background:#fff}
.eb-col-del{width:32px}
.eb-col-content{width:15%}
.eb-col-date{width:12%}
.eb-col-step{width:14.2%}
.eb-del-btn{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border:none;border-radius:50%;background:#ff4d4f;color:#fff;font-size:13px;cursor:pointer;line-height:1;padding:0}
.eb-del-btn:hover{background:#d9363e}
.eb-input{width:100%;border:1px solid #d9d9d9;border-radius:4px;padding:5px 6px;font-size:13px;text-align:center;background:#fffbe6;outline:none;font-family:inherit}
.eb-input:focus{background:#ffe58f;border-color:#fadb14;box-shadow:0 0 0 2px rgba(250,219,20,0.25)}
.eb-date-picker{width:100%;border:1px solid #d9d9d9;border-radius:4px;padding:5px 4px;font-size:13px;text-align:center;background:#fffbe6;outline:none;font-family:inherit;cursor:pointer}
.eb-date-picker:focus{background:#ffe58f;border-color:#fadb14;box-shadow:0 0 0 2px rgba(250,219,20,0.25)}
.eb-date-picker.eb-no-date{color:transparent}
.eb-date-picker.eb-no-date::-webkit-datetime-edit{color:transparent}
.eb-date-picker.eb-no-date::-webkit-datetime-edit-text{color:transparent}
.eb-date-picker.eb-no-date::-webkit-datetime-edit-year-field{color:transparent}
.eb-date-picker.eb-no-date::-webkit-datetime-edit-month-field{color:transparent}
.eb-date-picker.eb-no-date::-webkit-datetime-edit-day-field{color:transparent}
.eb-check-cell{cursor:pointer;user-select:none;transition:background 0.15s;text-align:left;padding-left:8px;color:#444;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.eb-check-cell:hover{background:#f0f5ff}
.eb-check-cell.checked{background:#f6ffed;color:#52c41a}
.eb-check-cell.empty{cursor:default;color:#ccc}
.eb-check-cell.empty:hover{background:#fff}
.eb-box{display:inline-block;width:18px;text-align:center;margin-right:2px;font-weight:bold}
.eb-date-text{font-size:12px}
.eb-example{background:#f6ffed}
.eb-example-label{color:#389e0d;font-weight:bold}
.eb-example-date{color:#389e0d;font-weight:600}
.eb-add-row{text-align:center;margin-top:12px}
.eb-add-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;border:1px solid #b8d0e8;background:#fff;color:#1a3c5a;font-size:22px;cursor:pointer;transition:all 0.15s;box-shadow:0 2px 6px rgba(0,0,0,0.06)}
.eb-add-btn:hover{background:#d9edf7;border-color:#7cb6dd;transform:scale(1.05)}
.eb-reference{margin-top:22px;border:1px solid #b8d0e8;border-radius:6px;overflow:hidden}
.eb-ref-title{background:#d9edf7;color:#1a3c5a;font-weight:bold;padding:10px 14px;font-size:14px}
.eb-ref-table{width:100%;border-collapse:collapse;font-size:12px}
.eb-ref-table th,.eb-ref-table td{border:1px solid #b8d0e8;padding:7px 8px;text-align:center}
.eb-ref-table th{background:#e8f4fc;font-weight:bold}
.eb-actions{margin-top:16px;text-align:center}

@media print{
  @page{size:A4 landscape;margin:10mm 8mm}
  .eb-tips,.eb-reference,.eb-add-row,.eb-actions{display:none}
  .eb-table{font-size:11pt}
  .eb-table th,.eb-table td{padding:4px 2px;border:1px solid #666}
  .eb-table th{background:#d9edf7!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .eb-input,.eb-date-picker{border:none;background:transparent;padding:0;font-size:11pt;appearance:none}
  .eb-check-cell{font-size:11pt;padding-left:4px}
  .eb-check-cell.checked{background:#f6ffed!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .eb-example{background:#f6ffed!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .eb-del-cell{display:none}
  .eb-col-del{display:none}
}

/* ===== 听写页面 ===== */
.dict-page{display:flex;align-items:center;justify-content:center;min-height:100%;padding:20px}
.dict-frame{background:#fff;border-radius:14px;border:1px solid #e0e3e8;box-shadow:0 4px 24px rgba(0,0,0,0.06);width:100%;max-width:640px;margin:0 auto;overflow:hidden}
.dict-top{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:#fafbfc;border-bottom:1px solid #eef0f3}
.dict-top-left{display:flex;align-items:center;gap:10px}
.dict-top-icon{font-size:20px}
.dict-top-title{font-size:15px;font-weight:600;color:#1a1a2e}
.dict-top-sub{font-size:12px;color:#8892a0}
.dict-exit-btn{font-size:12px;color:#d94a4a;background:#fff;border:1px solid #f5d0d0;padding:5px 12px;border-radius:7px;cursor:pointer;font-family:var(--font-sans)}
.dict-exit-btn:hover{background:#fef0f0}
.dict-main{display:flex;flex-direction:column;align-items:center;padding:32px 28px;gap:18px}
.dict-step-row{display:flex;align-items:baseline;gap:6px}
.dict-step-badge{display:flex;align-items:center;justify-content:center;width:26px;height:26px;background:#e8f0fe;color:#1967d2;border-radius:13px;font-size:13px;font-weight:600}
.dict-step-total{font-size:13px;color:#8892a0}
.dict-bar{width:100%;max-width:280px;height:5px;background:#e8ecf1;border-radius:3px;overflow:hidden}
.dict-bar-fill{height:100%;background:linear-gradient(90deg,#4285f4,#1967d2);border-radius:3px;transition:width 0.3s}
.dict-card{background:#fff;border-radius:14px;padding:28px 36px;text-align:center;border:1px solid #eef0f3;box-shadow:0 2px 12px rgba(0,0,0,0.04);width:100%}
.dict-word{font-size:38px;font-weight:600;color:#1a1a2e;letter-spacing:1.5px;line-height:1.3}
.dict-phonetic{font-size:14px;color:#8892a0;margin-top:4px}
.dict-cn{font-size:17px;color:#c43e3e;margin-top:6px}
.dict-root{font-size:13px;color:#1967d2;margin-top:8px;font-style:italic;word-break:break-all}
.dict-note{font-size:13px;color:#5f6368;margin-top:8px;line-height:1.6;text-align:left;background:#f8f9fa;padding:10px 14px;border-radius:8px;border:1px solid #eef0f3;max-width:400px;margin-left:auto;margin-right:auto}
.dict-status{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;background:#e7f4e4;color:#137333;border-radius:20px;font-size:13px;margin:0 auto}
.dict-status-dot{width:8px;height:8px;border-radius:4px;background:#137333;flex-shrink:0}
.dict-status-dot-play{background:#1967d2}
.dict-status-dot-wait{background:#e37400}
.dict-status-dot-pause{background:#8892a0}
.dict-queue{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;max-width:100%}
.dict-q-item{font-size:11px;padding:3px 9px;border-radius:10px;border:1px solid transparent}
.dict-q-done{border-color:#cce6cc;background:#f2faf2;color:#137333}
.dict-q-curr{border-color:#4285f4;background:#e8f0fe;color:#1967d2;font-weight:500}
.dict-btns{display:flex;gap:10px;margin-top:4px;justify-content:center}
.dict-mastery{display:flex;gap:14px;justify-content:center;margin:12px 0}
.dict-mastery .mastery-dot{width:28px !important;height:28px !important;border-radius:50%;cursor:pointer}
.dict-btn{font-size:13px;padding:8px 18px;border-radius:8px;border:1px solid #dde1e7;background:#fff;color:#5f6368;cursor:pointer;font-family:var(--font-sans)}
.dict-btn:hover{background:#f5f6f8}
.dict-btn-stop{color:#d94a4a;border-color:#f5d0d0}
.dict-btn-stop:hover{background:#fef0f0}
.dict-btn-pause{border-color:#dde1e7}
.dict-btn-skip{background:#1967d2;color:#fff;border:none;font-weight:500}
.dict-btn-skip:hover{background:#1557b0}

.btn-dict{background:#e8f4fd;color:#185FA5;border-color:#85B7EB}
.btn-dict:hover{background:#b5d4f4}
.btn-dict:disabled{opacity:0.4;cursor:not-allowed}

@media(max-width:768px){
  .dict-page{padding:0}
  .dict-frame{border-radius:0;border:none;box-shadow:none;max-width:100%}
  .dict-word{font-size:30px}
  .dict-cn{font-size:15px}
  .dict-card{padding:22px 24px}
  .dict-root{font-size:12px}
  .dict-note{font-size:12px;padding:8px 12px}
  .dict-btns{flex-wrap:wrap;justify-content:center}
}