/* ── 抽屜 Drawer ── 設計系統 ──
   紙 #F6F5F1 · 墨 #20222A · 靛青 #3D5A99
   招牌元素：檔案列左緣的類型書脊                          */

:root{
  --paper:#F6F5F1; --surface:#FFFFFF; --ink:#20222A;
  --muted:#8A8D98; --faint:#B6B8C0; --line:#E4E2DA; --line-soft:#EDECE6;
  --accent:#3D5A99; --accent-deep:#33497E; --accent-wash:#EDF1F8;
  --danger:#A8442E;
  /* 類型書脊色 */
  --c-folder:#3D5A99; --c-doc:#4A6DB5; --c-img:#3E8E7E;
  --c-media:#B06542; --c-zip:#8C7B5A; --c-etc:#9AA0AB;
  --radius:10px;
  --shadow:0 1px 2px rgba(32,34,42,.05), 0 8px 24px rgba(32,34,42,.06);
}

*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none !important}
html,body{height:100%}
body{
  background:var(--paper); color:var(--ink);
  font:14px/1.65 "Noto Sans TC", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing:antialiased;
}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent-wash)}

/* ── 字標 ── */
.wordmark{
  font:600 26px/1 "Noto Serif TC", serif; letter-spacing:.35em;
  color:var(--ink); user-select:none; white-space:nowrap;
}
.wordmark span{
  display:block; font:500 10px "Noto Sans TC",sans-serif;
  letter-spacing:.5em; color:var(--muted); margin-top:6px; text-indent:.1em;
}
.wordmark.small{font-size:19px;letter-spacing:.3em}

/* ── 登入閘 ── */
.gate{
  min-height:100vh; display:flex; flex-direction:column;
  align-items:center; justify-content:center; padding:24px; gap:0;
}
.gate-card{
  background:var(--surface); border:1px solid var(--line);
  border-radius:16px; padding:44px 40px 36px; width:min(380px,100%);
  box-shadow:var(--shadow); text-align:center;
  animation:rise .5s cubic-bezier(.2,.7,.3,1) both;
}
.gate-sub{color:var(--muted);font-size:13px;margin:14px 0 28px;letter-spacing:.15em}
.gate-card form{display:flex;flex-direction:column;gap:14px;text-align:left}
.gate-card label{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:6px}
.gate-card input{
  border:1px solid var(--line); border-radius:8px; padding:10px 12px;
  background:var(--paper); font-size:15px; transition:border-color .15s;
}
.gate-card input:focus{outline:none;border-color:var(--accent)}
.gate-card button{
  margin-top:10px; background:var(--accent); color:#fff; border-radius:9px;
  padding:11px; font-weight:500; font-size:15px; transition:background .15s;
}
.gate-card button:hover{background:var(--accent-deep)}
.gate-err{color:var(--danger);font-size:13px;text-align:center}
.gate-foot{margin-top:28px;color:var(--faint);font-size:12px;letter-spacing:.35em;text-indent:.35em}

/* ── 版面 ── */
#app{display:flex;flex-direction:column;height:100vh}
.topbar{
  display:flex; align-items:center; gap:18px;
  padding:0 20px; height:58px; flex:none;
  background:var(--paper); border-bottom:1px solid var(--line);
}
.search{flex:1;max-width:520px}
.search input{
  width:100%; border:1px solid var(--line); background:var(--surface);
  border-radius:9px; padding:8px 14px; font-size:14px; transition:border-color .15s;
}
.search input:focus{outline:none;border-color:var(--accent)}
.whoami{margin-left:auto;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}

.body{flex:1;display:flex;min-height:0}
.sidebar{
  width:216px; flex:none; padding:18px 14px; display:flex; flex-direction:column; gap:4px;
  border-right:1px solid var(--line-soft);
}
.new-btn{
  background:var(--surface); border:1px solid var(--line); border-radius:12px;
  padding:11px 16px; font-weight:500; font-size:14px; text-align:left;
  box-shadow:0 1px 2px rgba(32,34,42,.05); margin-bottom:14px;
  transition:box-shadow .15s, transform .15s;
}
.new-btn:hover{box-shadow:var(--shadow);transform:translateY(-1px)}
.nav-item{
  padding:9px 14px; border-radius:8px; color:var(--ink); font-size:14px;
  transition:background .12s;
}
.nav-item:hover{background:var(--line-soft)}
.nav-item.active{background:var(--accent-wash);color:var(--accent-deep);font-weight:500}
.storage{margin-top:auto;padding:14px 6px 4px}
.storage-label{font-size:11px;color:var(--muted);letter-spacing:.15em;margin-bottom:8px}
.storage-bar{height:3px;background:var(--line);border-radius:2px;overflow:hidden}
#storage-fill{height:100%;width:0;background:var(--accent);border-radius:2px;transition:width .5s ease}
.storage-text{font-size:12px;color:var(--muted);margin-top:7px}

.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--surface);
      border-radius:16px 0 0 0; border:1px solid var(--line-soft); border-right:0; border-bottom:0}
.toolbar{
  display:flex;align-items:center;gap:12px;padding:14px 22px 10px;flex:none;
}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:2px;font-size:15px;min-width:0}
.crumbs a{padding:4px 8px;border-radius:7px;color:var(--muted);transition:background .12s}
.crumbs a:hover{background:var(--line-soft);color:var(--ink)}
.crumbs .cur{padding:4px 8px;font-weight:600}
.crumbs .sep{color:var(--faint)}
.toolbar-right{margin-left:auto;display:flex;align-items:center;gap:8px;flex:none}
.toolbar-right select{
  border:1px solid var(--line);border-radius:8px;padding:6px 8px;background:var(--surface);
  font-size:13px;color:var(--muted);
}

.sel-bar{
  display:flex;align-items:center;gap:8px;margin:0 22px 8px;padding:8px 14px;
  background:var(--accent-wash);border:1px solid #D8E0F0;border-radius:10px;font-size:13px;
}
#sel-count{font-weight:600;color:var(--accent-deep);margin-right:6px}

/* ── 按鈕 ── */
.icon-btn{
  width:34px;height:34px;border-radius:8px;display:inline-flex;align-items:center;
  justify-content:center;font-size:16px;color:var(--muted);transition:background .12s;
}
.icon-btn:hover{background:var(--line-soft);color:var(--ink)}
.icon-btn.light{color:#D5D7DE}
.icon-btn.light:hover{background:rgba(255,255,255,.12);color:#fff}
.ghost-btn{
  padding:6px 12px;border-radius:8px;font-size:13px;color:var(--ink);
  border:1px solid transparent;transition:background .12s;
}
.ghost-btn:hover{background:var(--line-soft)}
.ghost-btn.danger{color:var(--danger)}
.ghost-btn.light{color:#D5D7DE}
.ghost-btn.light:hover{background:rgba(255,255,255,.12);color:#fff}

/* ── 檔案清單（招牌：類型書脊） ── */
.dropzone{flex:1;overflow-y:auto;padding:4px 22px 40px;position:relative}
.list.rows .item{
  display:flex;align-items:center;gap:14px;
  padding:10px 14px 10px 0;border-radius:9px;position:relative;
  border-bottom:1px solid var(--line-soft);
  cursor:default;user-select:none;
  animation:rise .28s cubic-bezier(.2,.7,.3,1) both;
}
.list.rows .item::before{           /* 書脊 */
  content:"";width:3px;align-self:stretch;border-radius:2px;
  background:var(--spine,var(--c-etc));margin-right:2px;flex:none;
  opacity:.85;
}
.list.rows .item:hover{background:var(--paper)}
.list.rows .item.sel{background:var(--accent-wash)}
.list.rows .icon{flex:none}
.list.rows .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}
.list.rows .meta{flex:none;color:var(--muted);font-size:12.5px;width:88px;text-align:right}
.list.rows .meta.time{width:130px}
.badge-share{
  flex:none;font-size:10.5px;color:var(--accent-deep);background:var(--accent-wash);
  border:1px solid #D8E0F0;border-radius:20px;padding:1px 8px;letter-spacing:.05em;
}

/* 格狀檢視 */
.list.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));
  gap:14px;padding-top:10px;
}
.list.grid .item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;position:relative;cursor:default;user-select:none;
  transition:box-shadow .15s, transform .15s;
  animation:rise .28s cubic-bezier(.2,.7,.3,1) both;
}
.list.grid .item::before{           /* 書脊（格狀時為頂緣） */
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--spine,var(--c-etc));opacity:.9;z-index:1;
}
.list.grid .item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.list.grid .item.sel{outline:2px solid var(--accent);outline-offset:-2px}
.list.grid .thumb{
  height:110px;display:flex;align-items:center;justify-content:center;
  background:var(--paper);overflow:hidden;
}
.list.grid .thumb img{width:100%;height:100%;object-fit:cover}
.list.grid .cap{display:flex;align-items:center;gap:8px;padding:9px 11px}
.list.grid .cap .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.list.grid .meta,.list.grid .badge-share{display:none}

.icon{width:22px;height:22px;flex:none}
.list.grid .thumb .icon{width:44px;height:44px;opacity:.9}

/* 進場錯落 */
.list .item:nth-child(2){animation-delay:.02s}
.list .item:nth-child(3){animation-delay:.04s}
.list .item:nth-child(4){animation-delay:.06s}
.list .item:nth-child(5){animation-delay:.08s}
.list .item:nth-child(6){animation-delay:.10s}
.list .item:nth-child(n+7){animation-delay:.12s}

.empty{
  padding:90px 20px;text-align:center;color:var(--muted);
}
.empty-serif{
  font:600 24px "Noto Serif TC",serif;letter-spacing:.2em;color:var(--faint);
}
.empty-sub{margin-top:12px;font-size:13px}

/* ── 拖放提示 ── */
.drop-hint{
  position:fixed;inset:0;z-index:60;background:rgba(61,90,153,.08);
  backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;
  pointer-events:none;
}
.drop-hint div{
  background:var(--surface);border:2px dashed var(--accent);border-radius:16px;
  padding:28px 48px;font-size:17px;font-weight:500;color:var(--accent-deep);
}

/* ── 上傳面板 ── */
.up-panel{
  position:fixed;right:20px;bottom:20px;width:min(360px,calc(100vw - 40px));z-index:50;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);overflow:hidden;
  animation:rise .3s cubic-bezier(.2,.7,.3,1) both;
}
.up-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 10px 12px 18px;border-bottom:1px solid var(--line-soft);
  font-weight:600;font-size:14px;
}
#up-list{max-height:260px;overflow-y:auto;padding:6px 0}
.up-item{padding:8px 18px;font-size:13px}
.up-item .r{display:flex;justify-content:space-between;gap:12px}
.up-item .n{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.up-item .s{color:var(--muted);flex:none}
.up-item .bar{height:3px;background:var(--line-soft);border-radius:2px;margin-top:6px;overflow:hidden}
.up-item .bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.up-item.done .bar i{background:var(--c-img)}
.up-item.err .s{color:var(--danger)}

/* ── 右鍵選單 ── */
.ctx{
  position:fixed;z-index:70;background:var(--surface);border:1px solid var(--line);
  border-radius:11px;box-shadow:var(--shadow);padding:6px;min-width:190px;
  animation:pop .12s ease-out both;
}
.ctx button{
  display:block;width:100%;text-align:left;padding:8px 14px;border-radius:7px;
  font-size:13.5px;transition:background .1s;
}
.ctx button:hover{background:var(--line-soft)}
.ctx button.danger{color:var(--danger)}
.ctx hr{border:none;border-top:1px solid var(--line-soft);margin:5px 8px}

/* ── 彈窗 ── */
.modal{
  position:fixed;inset:0;z-index:80;background:rgba(32,34,42,.32);
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.modal-card{
  background:var(--surface);border-radius:16px;box-shadow:var(--shadow);
  width:min(460px,100%);padding:24px 24px 20px;
  animation:pop .18s cubic-bezier(.2,.7,.3,1) both;
}
.modal-title{font-weight:600;font-size:16px;margin-bottom:16px}
.modal-body input[type=text]{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;
  font-size:15px;background:var(--paper);
}
.modal-body input[type=text]:focus{outline:none;border-color:var(--accent)}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}
.btn-primary{
  background:var(--accent);color:#fff;border-radius:9px;padding:9px 20px;
  font-weight:500;transition:background .15s;
}
.btn-primary:hover{background:var(--accent-deep)}
.btn-primary.danger{background:var(--danger)}
.btn-primary.danger:hover{background:#8F3A27}
.btn-plain{padding:9px 16px;border-radius:9px;color:var(--muted)}
.btn-plain:hover{background:var(--line-soft);color:var(--ink)}

/* 移至…資料夾瀏覽器 */
.mv-crumbs{display:flex;flex-wrap:wrap;gap:2px;font-size:13px;margin-bottom:10px;color:var(--muted)}
.mv-crumbs a{padding:3px 7px;border-radius:6px}
.mv-crumbs a:hover{background:var(--line-soft);color:var(--ink)}
.mv-list{
  border:1px solid var(--line);border-radius:10px;max-height:240px;overflow-y:auto;
}
.mv-list button{
  display:flex;align-items:center;gap:10px;width:100%;text-align:left;
  padding:9px 14px;font-size:14px;border-bottom:1px solid var(--line-soft);
}
.mv-list button:last-child{border-bottom:none}
.mv-list button:hover{background:var(--paper)}
.mv-empty{padding:24px;text-align:center;color:var(--faint);font-size:13px}

/* 分享對話框 */
.share-url{
  display:flex;gap:8px;margin-top:6px;
}
.share-url input{
  flex:1;border:1px solid var(--line);border-radius:9px;padding:9px 12px;
  font-size:13px;background:var(--paper);color:var(--muted);
}
.share-note{font-size:12.5px;color:var(--muted);margin-top:12px;line-height:1.7}

/* ── 預覽層 ── */
.viewer{
  position:fixed;inset:0;z-index:90;background:rgba(24,25,31,.94);
  display:flex;flex-direction:column;
  animation:fade .2s ease-out both;
}
.viewer-bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 18px;color:#E8E9EE;flex:none;
}
#viewer-name{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.viewer-bar > div{display:flex;align-items:center;gap:6px;flex:none}
.viewer-body{
  flex:1;display:flex;align-items:center;justify-content:center;
  min-height:0;padding:0 20px 20px;
}
.viewer-body img{max-width:100%;max-height:100%;object-fit:contain;border-radius:6px}
.viewer-body video{max-width:100%;max-height:100%;border-radius:6px;background:#000}
.viewer-body audio{width:min(520px,100%)}
.viewer-body iframe{width:100%;height:100%;border:0;border-radius:6px;background:#fff}
.viewer-body pre{
  width:min(860px,100%);max-height:100%;overflow:auto;background:#fff;color:var(--ink);
  border-radius:10px;padding:24px 28px;font:13px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;
  white-space:pre-wrap;word-break:break-word;
}
.viewer-body .noprev{color:#9DA0AB;text-align:center;font-size:14px}

/* ── Toast ── */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);z-index:100;
  background:var(--ink);color:#F2F2F5;border-radius:10px;padding:10px 20px;
  font-size:13.5px;box-shadow:var(--shadow);
  animation:rise .25s ease-out both;
}

/* ── 動畫 ── */
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ── 響應式 ── */
#nav-toggle{display:none}
@media (max-width:760px){
  #nav-toggle{display:inline-flex}
  .topbar{gap:10px;padding:0 12px}
  .wordmark.small{display:none}
  .whoami #username{display:none}
  .sidebar{
    position:fixed;left:0;top:58px;bottom:0;z-index:40;background:var(--paper);
    transform:translateX(-100%);transition:transform .22s cubic-bezier(.2,.7,.3,1);
    box-shadow:none;width:240px;border-right:1px solid var(--line);
  }
  .sidebar.open{transform:none;box-shadow:var(--shadow)}
  .main{border-radius:0;border:none}
  .dropzone{padding:4px 12px 40px}
  .toolbar{padding:10px 12px 8px}
  .sel-bar{margin:0 12px 8px;flex-wrap:wrap}
  .list.rows .meta.time{display:none}
  .list.grid{grid-template-columns:repeat(auto-fill,minmax(136px,1fr))}
}

/* 鍵盤焦點 */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}