/* ============================================================
   TK-Office v3 · 深色设计系统
   参考 5233（GitHub-Dark）· 蓝紫渐变主色
   ============================================================ */

:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2128;
  --panel3: #21262d;
  --border: #30363d;
  --border-soft: #21262d;
  --primary: #4d7cfe;
  --primary-2: #8b5cf6;
  --grad: linear-gradient(135deg, #4d7cfe 0%, #8b5cf6 100%);
  --grad-soft: linear-gradient(135deg, rgba(77,124,254,.16), rgba(139,92,246,.16));
  --danger: #f85149;
  --ok: #3fb950;
  --text: #e6edf3;
  --muted: #8b949e;
  --faint: #6e7681;
  --hover: #21262d;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 8px 28px rgba(0,0,0,.45);
  --shadow-sm: 0 2px 10px rgba(0,0,0,.35);
  --font: "PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.55;
}

::selection { background: rgba(77,124,254,.35); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #30363d; border-radius: 6px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #484f58; }
::-webkit-scrollbar-track { background: transparent; }

.hidden { display: none !important; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s,border-color .15s,color .15s,transform .06s,box-shadow .15s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--panel3); border-color: #3d444d; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-sm { padding: 5px 12px; font-size: 12.5px; border-radius: 8px; }
.btn-primary {
  background: var(--grad);
  border: none;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(99,102,241,.28);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg,#5d88ff,#9a6efb);
  box-shadow: 0 4px 16px rgba(99,102,241,.4);
}
.btn-accent {
  background: var(--grad);
  border: none;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(139,92,246,.3);
}
.btn-accent:hover:not(:disabled) {
  background: linear-gradient(135deg,#6a8fff,#a678fc);
  box-shadow: 0 4px 18px rgba(139,92,246,.45);
}
.btn-danger { color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: rgba(248,81,73,.12); border-color: rgba(248,81,73,.4); }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
  background: var(--grad-soft);
  color: #c7d2fe;
  border: 1px solid rgba(99,102,241,.35);
}

/* ============ 侧栏 ============ */
.sidebar {
  width: 244px;
  flex-shrink: 0;
  min-height: 100vh;
  height: 100vh;
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border-right: 1px solid var(--border);
}
.sb-head {
  padding: 22px 20px 16px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.logo-wrap { display: flex; align-items: center; }
.logo {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -.5px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.logo-dot { font-size: 26px; font-weight: 800; color: var(--primary-2); }
.logo-text { font-size: 16px; font-weight: 700; letter-spacing: .4px; }
.logo-sub { font-size: 11.5px; color: var(--faint); margin-top: 1px; }

.snav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 12px 14px;
}
.sec-label {
  padding: 16px 10px 6px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.6px;
  color: var(--faint);
  text-transform: uppercase;
  user-select: none;
}
.sec-label:first-child { padding-top: 4px; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 9.5px 12px;
  margin: 1.5px 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: #c9d1d9;
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  position: relative;
  transition: background .15s,color .15s,border-color .15s;
}
.nav-link:hover { background: var(--hover); color: #f0f6fc; }
.nav-link.active {
  background: var(--grad-soft);
  border-color: rgba(99,102,241,.38);
  color: #fff;
  font-weight: 600;
}
.nav-link.active::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 20%;
  bottom: 20%;
  width: 3px;
  border-radius: 3px;
  background: var(--grad);
}
.n-ic { width: 22px; text-align: center; font-size: 15.5px; flex-shrink: 0; }
.n-tx { flex: 1; }
.n-arrow { opacity: 0; transition: opacity .15s,transform .15s; color: var(--faint); font-size: 13px; }
.nav-link:hover .n-arrow, .nav-link.active .n-arrow { opacity: 1; transform: translateX(2px); }
.n-badge {
  font-size: 9.5px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  background: var(--grad);
  color: #fff;
  letter-spacing: .5px;
}

.sb-foot {
  padding: 12px 16px;
  border-top: 1px solid var(--border-soft);
  color: var(--faint);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 7px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 6px rgba(63,185,80,.7);
  flex-shrink: 0;
}

/* ============ 主内容 ============ */
.content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.mod-view { display: none; flex-direction: column; flex: 1; }
.mod-view.visible { display: flex; animation: fadeUp .28s ease; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 顶栏 */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px 30px 16px;
  border-bottom: 1px solid var(--border-soft);
}
.tb-title h1 { font-size: 19px; font-weight: 700; letter-spacing: .2px; }
.tb-title p { font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.tb-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.btn-ic { font-size: 14px; }

/* ============ 工作台 ============ */
.empty-state { display: flex; justify-content: center; padding: 8vh 30px 0; }
.drop-zone {
  width: min(640px,100%);
  padding: 52px 30px;
  border: 2px dashed var(--border);
  border-radius: 18px;
  background: var(--panel);
  text-align: center;
  cursor: pointer;
  transition: border-color .2s,background .2s,transform .2s;
}
.drop-zone:hover { border-color: rgba(99,102,241,.55); background: var(--panel2); }
.drop-zone.drag-over {
  border-color: var(--primary);
  background: rgba(77,124,254,.09);
  transform: scale(1.015);
}
.dz-ring {
  width: 76px;
  height: 76px;
  margin: 0 auto 18px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-soft);
  border: 1px solid rgba(99,102,241,.3);
  animation: float 3.2s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}
.dz-icon { font-size: 34px; }
.dz-title { font-size: 16.5px; font-weight: 600; }
.dz-hint { font-size: 12.5px; color: var(--muted); margin-top: 8px; }

.workspace { padding: 18px 30px 40px; display: flex; flex-direction: column; gap: 14px; }
.doc-meta { display: flex; align-items: center; gap: 10px; padding: 2px 2px 0; }
.doc-meta > span:first-child { font-size: 13px; color: var(--faint); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.toolbar-hint { margin-left: auto; font-size: 11.5px; color: var(--faint); }

.docs { display: flex; flex-direction: column; gap: 14px; }

/* 文档卡片 */
.doc-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color .15s,box-shadow .15s;
}
.doc-card:hover { border-color: #3d444d; }
.doc-card.is-empty { border-color: var(--border); opacity: .85; }
.doc-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--panel2);
}
.grip { cursor: grab; color: #484f58; font-size: 15px; user-select: none; }
.grip:active { cursor: grabbing; }
.doc-name {
  flex: 1;
  min-width: 120px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  padding: 5px 9px;
  transition: border-color .15s,background .15s;
}
.doc-name:hover { background: var(--panel3); }
.doc-name:focus {
  outline: none;
  background: var(--bg);
  border-color: var(--primary);
}
.doc-count { font-size: 12px; color: var(--muted); white-space: nowrap; }
.doc-head-right { display: flex; align-items: center; gap: 7px; }

.fmt-select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}
.fmt-select:focus { outline: none; border-color: var(--primary); }

.doc-main {
  display: flex;
  gap: 14px;
  padding: 14px;
  align-items: flex-start;
}
/* 页面条 */
.doc-strip {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-width: 0;
  position: relative;
}
.doc-strip.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--faint);
  font-size: 12.5px;
  background: var(--bg);
  padding: 16px;
  text-align: center;
}

/* 页面缩略图 */
.page {
  position: relative;
  width: 126px;
  border-radius: 9px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
  cursor: grab;
  transition: box-shadow .15s,transform .1s,opacity .15s;
  user-select: none;
}
.page:hover { box-shadow: 0 3px 12px rgba(0,0,0,.55); }
.page:active { cursor: grabbing; }
.page img { display: block; width: 100%; height: auto; }
.pnum {
  position: absolute;
  top: 5px;
  left: 5px;
  font-size: 10px;
  background: rgba(13,17,23,.78);
  color: #e6edf3;
  padding: 1px 7px;
  border-radius: 10px;
  pointer-events: none;
}
.pho {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: rgba(13,17,23,.72);
  color: transparent;
  font-size: 12px;
  line-height: 19px;
  text-align: center;
  border: 1.5px solid rgba(255,255,255,.5);
  opacity: 0;
  transition: opacity .12s,background .12s;
}
.page.selected { box-shadow: 0 0 0 2.5px var(--primary),0 4px 14px rgba(77,124,254,.35); }
.page.selected .pho { opacity: 1; background: var(--primary); color: #fff; border-color: var(--primary); }
.page.dragging { opacity: .35; }
.page.drop-before { box-shadow: -3px 0 0 0 var(--primary),0 0 0 2.5px var(--primary); }
.page.drop-after { box-shadow: 3px 0 0 0 var(--primary),0 0 0 2.5px var(--primary); }

/* 预览面板 */
.doc-preview {
  width: 250px;
  flex-shrink: 0;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--panel3);
  overflow: hidden;
}
.pv-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 11.5px;
  color: var(--muted);
}
.pv-title { color: var(--text); font-weight: 600; font-size: 12px; max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pv-body {
  position: relative;
  margin: 12px;
  aspect-ratio: 1 / 1.3;
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.pv-body.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--faint);
  font-size: 12px;
  background: var(--bg);
  border: 1.5px dashed var(--border);
  box-shadow: none;
}
.pv-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.pv-ph {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: none;
  font-size: 15px;
  line-height: 26px;
  text-align: center;
}
.pv-nav { display: none; gap: 8px; padding: 0 12px 12px; }
.doc-card.previewing .pv-nav { display: flex; }
.doc-card.previewing .pv-ph { display: block; }

/* 拖拽幽灵 */
.drag-ghost {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  width: 92px;
  background: var(--panel3);
  border: 1.5px solid var(--primary);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(0,0,0,.55);
  padding: 8px;
  font-size: 11px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: .95;
}
.ghost-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  font-size: 10px;
  padding: 1px 8px;
  font-weight: 700;
}
.drag-ghost.doc-ghost { width: 150px; }

/* 拖拽目标高亮 */
.doc-strip.drop-target { background: rgba(77,124,254,.07); border-radius: var(--radius-sm); }
.doc-strip.drag-over { background: rgba(77,124,254,.1); }
.doc-strip.drop-target::after {
  content: "drop-here";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12.5px;
  color: var(--primary);
  background: rgba(13,17,23,.55);
  border-radius: var(--radius-sm);
  z-index: 5;
}
.doc-drop-above { box-shadow: 0 -2.5px 0 0 var(--primary); }
.doc-drop-below { box-shadow: 0 2.5px 0 0 var(--primary); }

/* 放置区 */
.dropzones { display: flex; gap: 14px; }
.dropzone {
  flex: 1;
  min-height: 90px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: var(--faint);
  font-size: 12.5px;
  transition: border-color .15s,background .15s,color .15s;
  padding: 16px;
}
.dropzone .dz-plus { font-size: 22px; }
.dropzone:hover { border-color: #444c56; color: var(--muted); }
.dropzone.drag-over { border-color: var(--primary); background: rgba(77,124,254,.08); color: var(--text); }
.dropzone.discard { border-color: rgba(148,66,62,.6); }
.dropzone.discard:hover { border-color: rgba(248,81,73,.6); }
.dropzone.discard.drag-over { border-color: var(--danger); background: rgba(248,81,73,.1); color: var(--text); }/* ============ 辅助模块卡片 ============ */
.mod-card {
  width: min(680px,calc(100% - 48px));
  margin: 30px auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 30px 32px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.mod-hero { display: flex; align-items: center; gap: 16px; }
.hero-ic {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: 0 4px 14px rgba(99,102,241,.35);
  flex-shrink: 0;
}
.mod-hero h2 { font-size: 18.5px; font-weight: 700; letter-spacing: .2px; }
.mod-hero p { font-size: 12.5px; color: var(--muted); margin-top: 4px; line-height: 1.6; }

.mod-body { display: flex; flex-direction: column; gap: 18px; }

/* 大拖放选择卡片 */
.drop-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 30px 20px;
  border: 2px dashed var(--border);
  border-radius: 14px;
  background: var(--bg);
  cursor: pointer;
  transition: border-color .18s,background .18s;
  text-align: center;
}
.drop-card:hover { border-color: rgba(99,102,241,.6); background: var(--panel2); }
.drop-card.drag-over { border-color: var(--primary); background: rgba(77,124,254,.09); }
.dc-ic { font-size: 30px; }
.dc-main { font-size: 14px; font-weight: 600; color: var(--text); }
.dc-name {
  font-size: 12px;
  color: var(--muted);
  background: var(--panel3);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 4px 14px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.drop-card.has-file .dc-name { color: var(--ok); border-color: rgba(63,185,80,.35); }

/* 参数网格 */
.param-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill,minmax(170px,1fr));
  gap: 14px;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 18px;
}
.param-grid label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
}
.param-grid input,
.param-grid select {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 11px;
  font-size: 13.5px;
  font-family: inherit;
  width: 100%;
  transition: border-color .15s;
}
.param-grid input:focus,
.param-grid select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(77,124,254,.18); }
.crop-grid { grid-template-columns: repeat(auto-fill,minmax(110px,1fr)); }

.btn-run { align-self: stretch; padding: 12px; font-size: 14.5px; }

.hint-line { font-size: 12px; color: var(--faint); text-align: center; }

/* URL 输入 */
.or-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--faint);
  font-size: 12px;
}
.or-divider::before,
.or-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}
.url-input-row {
  display: flex;
  gap: 10px;
}
.url-input {
  flex: 1;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--rule);
  background: var(--panel2);
  color: var(--text);
  font-size: 13px;
  transition: border-color .2s, box-shadow .2s;
}
.url-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(77,124,254,.18);
}
.url-input::placeholder {
  color: var(--faint);
}

/* 结果 */
.mod-result { margin-top: 2px; }
.ok-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(63,185,80,.08);
  border: 1px solid rgba(63,185,80,.3);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 13px;
  animation: fadeUp .25s ease;
}
.ok-box .done { color: var(--ok); font-weight: 600; }
.err-box {
  background: rgba(248,81,73,.08);
  border: 1px solid rgba(248,81,73,.32);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 13px;
  color: var(--danger);
  animation: fadeUp .25s ease;
}

/* ============ 导出结果面板 / 弹窗 / 提示 ============ */
.result-panel {
  width: min(720px,calc(100% - 48px));
  margin: 10px auto 40px;
  background: var(--panel);
  border: 1px solid rgba(63,185,80,.3);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: fadeUp .3s ease;
}
.rp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--panel2);
}
.rp-head h3 { font-size: 15px; color: var(--ok); }
.result-files { padding: 12px 20px; display: flex; flex-direction: column; gap: 8px; }
.rf-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border-soft);
}
.rf-ico { font-size: 16px; }
.rf-name { flex: 1; font-size: 13px; word-break: break-all; }
.rp-foot { padding: 0 20px 18px; text-align: right; }

.modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal-mask { position: absolute; inset: 0; background: rgba(0,0,0,.7); backdrop-filter: blur(3px); }
.modal-box {
  position: relative;
  z-index: 1;
  width: min(560px,calc(100% - 40px));
  max-height: 82vh;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  animation: popIn .22s ease;
}
@keyframes popIn {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-soft);
}
.modal-head h3 { font-size: 15.5px; }
.modal-body { padding: 14px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; }
.modal-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border-soft);
}
.em-count { margin-right: auto; font-size: 12.5px; color: var(--muted); }

.em-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  background: var(--bg);
}
.em-ico { font-size: 16px; }
.em-name {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--text);
  font-size: 13.5px;
  font-family: inherit;
  padding: 6px 9px;
}
.em-name:focus { outline: none; background: var(--panel2); border-color: var(--primary); }
.em-fmt {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 12px;
  padding: 5px 7px;
  font-family: inherit;
}
.em-pages { font-size: 11.5px; color: var(--faint); white-space: nowrap; }
.em-preview { font-size: 11.5px; color: var(--muted); white-space: nowrap; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%);
  z-index: 2000;
  background: var(--panel3);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 13.5px;
  padding: 12px 22px;
  animation: toastIn .25s ease;
}
.toast.err { border-color: rgba(248,81,73,.5); color: var(--danger); }
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%,12px); }
  to { opacity: 1; transform: translate(-50%,0); }
}

/* Loading */
.loading-mask {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(13,17,23,.8);
  backdrop-filter: blur(4px);
  color: var(--text);
  font-size: 13.5px;
}
.spinner {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 4px solid #2a3038;
  border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* body 拖文件进入时提示层 */
body.dragfile .drop-zone { border-color: var(--primary); }
body.dragging-mode * { cursor: grabbing !important; }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  body { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    min-height: 0;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .sb-head { padding: 14px 16px 10px; }
  .snav {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    padding: 8px 10px;
  }
  .sec-label { width: 100%; padding: 8px 10px 4px; }
  .nav-link { width: auto; padding: 7px 11px; }
  .nav-link.active::before { display: none; }
  .sb-foot { display: none; }
  .topbar { padding: 16px 18px 12px; }
  .workspace { padding: 14px 16px 30px; }
  .doc-main { flex-direction: column; }
  .doc-preview { width: 100%; }
  .mod-card { width: calc(100% - 32px); margin: 18px auto; padding: 22px 18px; }
  .empty-state { padding: 6vh 16px 0; }
}