:root{
  --bg1: #dbeafe; /*淡天蓝*/
  --bg2: #fce7f3; /*淡粉*/
  --text: #0f172a;
  --muted: rgba(15,23,42,0.62);
  --border: rgba(15,23,42,0.12);
  --panel2: rgba(255,255,255,0.78);
  --panel: rgba(255,255,255,0.92);
  --accent: #2563eb;
  --accent2: #ec4899;
  --danger: #e11d48;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);
}

*{ box-sizing: border-box; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: linear-gradient(135deg, var(--bg1) 0%, var(--bg2) 100%);
  color: var(--text);
}

.app{
  max-width: min(1800px, 98vw);
  margin: 10px auto;
  padding: 0 10px;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel2);
  box-shadow: var(--shadow);
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
}

.authbar{
  display:flex;
  align-items:center;
  gap: 10px;
  margin-left: auto;
}

.auth-status{
  font-size: 12px;
  color: var(--muted);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.trial-banner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
  margin: 10px 0 14px;
  padding: 12px 14px;
  border: 1px solid rgba(225,29,72,0.25);
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(225,29,72,0.08), rgba(37,99,235,0.08));
  box-shadow: var(--shadow);
}
.trial-title{
  font-weight: 850;
  letter-spacing: 0.2px;
}
.trial-sub{
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}
.trial-actions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}
.logo{
  width:40px;
  height:40px;
  border-radius: 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(37,99,235,0.14);
  border: 1px solid rgba(37,99,235,0.28);
}
.title{ font-weight: 800; letter-spacing: 0.2px; }
.subtitle{ color: var(--muted); font-size: 12px; margin-top: 3px; }

.grid{
  display:grid;
  grid-template-columns: 300px 1fr 420px;
  gap: 12px;
}

@media (max-width: 980px){
  .grid{ grid-template-columns: 1fr; }
}

.panel{
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel2);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.panel-header{
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0.2));
}
.panel-title{ font-weight: 800; }
.panel-subtitle{ color: var(--muted); font-size: 12px; margin-top: 2px; }

.chat-panel{
  display:flex;
  flex-direction: column;
  height: min(860px, calc(100vh - 96px));
  overflow: hidden;
}

.conv-body{
  padding: 12px 14px 16px;
}
.conv-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.conv-actions .btn{
  flex: 1;
  min-width: 72px;
  font-size: 12px;
  padding: 8px 10px;
}
.conv-list{
  margin-top: 12px;
  display:flex;
  flex-direction: column;
  gap: 10px;
  max-height: 560px;
  overflow:auto;
}
.conv-item{
  text-align:left;
  width:100%;
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.02);
  cursor:pointer;
  color: var(--text);
}
.conv-item.active{
  border-color: rgba(124,92,255,0.55);
  background: rgba(124,92,255,0.16);
}
.conv-title{
  font-weight: 720;
  font-size: 12.5px;
  line-height: 1.2;
}
.conv-meta{
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

.messages{
  padding: 10px 14px;
  flex: 1;
  overflow-y:auto;
  min-height: 0; /* required for flex children scroll */
}

.msg{
  margin: 8px 0;
  padding: 4px 0;
}
.msg.user{
  border-radius: 14px;
  padding: 8px 10px;
  border: 1px solid rgba(37,99,235,0.25);
  background: rgba(37,99,235,0.10);
  border-color: rgba(37,99,235,0.25);
}
.msg.assistant{
  border: none;
  background: transparent;
  padding: 0;
  border-radius: 0;
}
.msg-meta{
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
  font-weight: 650;
}
.msg-content{
  white-space: normal;
  word-break: break-word;
  line-height: 1.42;
  font-size: 14px;
}

.msg-content h1, .msg-content h2, .msg-content h3, .msg-content h4, .msg-content h5, .msg-content h6{
  margin: 0.45em 0 0.22em;
  line-height: 1.35;
}
.msg-content p{ margin: 0.28em 0; }
.msg-content ul, .msg-content ol{ margin: 0.22em 0 0.35em 1.1em; }
.msg-content pre{
  margin: 0.32em 0;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.52);
  overflow-x: auto;
  line-height: 1.25;
}
.msg-content code{
  font-family: ui-monospace, "Cascadia Code", "Fira Mono", monospace;
  font-size: 0.92em;
  line-height: 1.25;
  background: transparent;
  border: none;
  padding: 0;
}
.msg-content blockquote{
  margin: 0.3em 0;
  padding-left: 10px;
  border-left: 3px solid rgba(15,23,42,0.2);
  color: rgba(15,23,42,0.85);
}
.msg-content a{
  color: var(--accent);
  text-decoration: none;
}
.msg-content a:hover{
  text-decoration: underline;
}

.msg-thinking{
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.28;
  font-size: 12px;
  color: var(--muted);
  border-left: 3px solid rgba(148, 163, 184, 0.6);
  padding-left: 8px;
  margin-bottom: 4px;
}
.msg-thinking-wrap{
  margin-bottom: 4px;
}
.msg-thinking-wrap > summary{
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
}
.msg-actions{
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.msg-action{
  font-size: 12px;
  padding: 4px 8px;
}

.composer{
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.65);
}
textarea{
  width:100%;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.9);
  color: var(--text);
  outline: none;
}
.composer-actions{
  display:flex;
  gap: 10px;
  margin-top: 10px;
  justify-content:flex-end;
}

.btn{
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.8);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 12px;
  cursor:pointer;
}
.btn.primary{
  border-color: rgba(37,99,235,0.35);
  background: rgba(37,99,235,0.14);
  color: rgba(15,23,42,0.95);
}
.btn:disabled{
  opacity: 0.6;
  cursor:not-allowed;
}

.status{
  padding: 6px 14px 10px;
  color: var(--muted);
  font-size: 13px;
}

.btn.danger-inline{
  border-color: rgba(225,29,72,0.35);
  background: rgba(225,29,72,0.10);
  color: var(--danger);
}

.md-fold{
  margin: 0.25em 0;
}
.md-fold > summary{
  cursor: pointer;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.msg-content hr{
  border: none;
  border-top: 1px solid rgba(15,23,42,0.14);
  margin: 0.55em 0;
}

.code-block-wrap{
  position: relative;
  margin: 0.25em 0;
  --code-visible-lines: 5;
}

.code-copy-btn{
  position: absolute;
  top: 4px;
  right: 6px;
  border: 1px solid rgba(15,23,42,0.14);
  background: rgba(255,255,255,0.82);
  color: var(--muted);
  border-radius: 8px;
  padding: 2px 8px;
  font-size: 11px;
  cursor: pointer;
}

.code-copy-btn:hover{
  background: rgba(255,255,255,0.95);
}

.code-pre{
  margin: 0.32em 0;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: max-height 0.2s ease;
}

.code-block-wrap.collapsed .code-pre{
  max-height: calc(1.35em * var(--code-visible-lines) + 16px);
}

.code-pre code{
  display: block;
  background: transparent;
  border: none;
  padding: 0;
}

.code-line{
  display: block;
  line-height: 1.35;
  margin: 0;
  padding: 0 2px;
}

.code-line.blue{
  background: rgba(191, 219, 254, 0.10);
}

.code-line.pink{
  background: rgba(251, 207, 232, 0.10);
}

.code-toggle-btn{
  width: 100%;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 0 0;
  text-align: center;
}

.code-toggle-btn:hover{
  color: var(--text);
}

.user-text-wrap{
  display: block;
}

.user-text-lines{
  white-space: pre-wrap;
  word-break: break-word;
}

.user-line{
  display: block;
  line-height: 1.35;
}

.user-text-wrap.collapsed .user-text-lines{
  max-height: calc(1.35em * 3);
  overflow: hidden;
}

.user-toggle-btn{
  width: 100%;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  padding: 3px 0 0;
  text-align: center;
}

.user-toggle-btn:hover{
  color: var(--text);
}

.side-panel{
  padding: 12px 14px 16px;
}
.field{
  margin: 12px 0;
}
label{ color: var(--muted); font-size: 12px; display:block; margin-bottom: 6px; }
.persona-row{
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.persona-row > .input{
  flex: 1 1 0;
  min-width: 0;
}
.template-grid{
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.btn.template-btn{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
}
.input{
  width:100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,0.9);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
  margin-bottom: 10px;
}

.toggles .check{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 10px;
  border: 1px dashed rgba(15,23,42,0.16);
  border-radius: 14px;
  margin-bottom: 10px;
  background: rgba(255,255,255,0.6);
}
.check input{ accent-color: var(--accent); }

.upload-list{
  margin-top: 10px;
}
.upload-item{
  border: 1px solid rgba(15,23,42,0.10);
  border-radius: 12px;
  padding: 10px 10px;
  background: rgba(255,255,255,0.7);
  margin: 8px 0;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
}
.upload-item .left{
  min-width: 0;
}
.upload-item .name{
  font-weight: 650;
  font-size: 12.5px;
}
.upload-item .path{
  color: var(--muted);
  font-size: 11px;
  margin-top: 3px;
  word-break: break-all;
}
.pill{
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.pill.ok{
  border-color: rgba(236,72,153,0.35);
  color: rgba(236,72,153,0.95);
}
.pill.no{
  border-color: rgba(37,99,235,0.35);
  color: rgba(37,99,235,0.95);
}

.hint{
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
code{
  background: rgba(148,163,184,0.06);
  padding: 1px 4px;
  border-radius: 10px;
  border: 1px solid rgba(148,163,184,0.14);
}

/* Light scrollbar + form controls */
*{
  scrollbar-width: thin;
  scrollbar-color: rgba(37,99,235,0.45) rgba(15,23,42,0.06);
}
*::-webkit-scrollbar{
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-track{
  background: rgba(15,23,42,0.06);
  border-radius: 999px;
}
*::-webkit-scrollbar-thumb{
  background: rgba(37,99,235,0.45);
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.65);
}

select.input{
  appearance: none;
}

input[type="file"]{
  width:100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,0.9);
  padding: 8px 10px;
}
input[type="file"]::file-selector-button{
  margin-right: 10px;
  border: 1px solid rgba(37,99,235,0.25);
  background: rgba(37,99,235,0.12);
  color: var(--accent);
  padding: 6px 12px;
  border-radius: 10px;
  cursor: pointer;
}

.conv-item{
  width:100%;
  padding: 0;
  border: 1px solid rgba(15,23,42,0.10);
  background: rgba(255,255,255,0.65);
  border-radius: 16px;
  cursor: pointer;
}
.conv-left{
  min-width: 0;
  flex: 1;
}
.conv-row{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
  padding: 10px 10px;
}
.conv-del{
  border: 1px solid rgba(15,23,42,0.10);
  background: rgba(255,255,255,0.75);
  color: rgba(15,23,42,0.75);
  width: 30px;
  height: 30px;
  border-radius: 12px;
  cursor: pointer;
  line-height: 28px;
  font-size: 18px;
  flex: 0 0 auto;
}
.conv-item.active{
  border-color: rgba(37,99,235,0.4);
  background: rgba(37,99,235,0.12);
}

/* ---- Tabs ---- */
.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.tabs{
  display: flex;
  gap: 6px;
}
.tab{
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.6);
  color: var(--muted);
  padding: 7px 18px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 650;
  font-size: 13px;
  transition: background 0.15s, color 0.15s;
}
.tab.active{
  border-color: rgba(37,99,235,0.45);
  background: rgba(37,99,235,0.15);
  color: var(--accent);
}
.tab-panel{ display: none; }
.tab-panel.active{ display: block; }

/* ---- Translate tab layout ---- */
.translate-grid{
  grid-template-columns: 420px 1fr;
}
@media (max-width: 860px){
  .translate-grid{ grid-template-columns: 1fr; }
}
.tr-options-panel{}
.tr-options-body{
  padding: 14px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: calc(100vh - 180px);
  overflow-y: auto;
}
.tr-start-btn{
  width: 100%;
  padding: 11px;
  font-size: 14px;
  font-weight: 700;
  margin-top: 6px;
}
.tr-output-panel{
  display: flex;
  flex-direction: column;
  height: min(760px, calc(100vh - 160px));
}
.tr-output-toolbar{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.5);
  flex-shrink: 0;
}
.tr-chunk-info{
  font-size: 12px;
  margin-left: auto;
}
.tr-output{
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, 'Cascadia Code', 'Fira Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}
.tr-output:empty::before{
  content: 'Translation output will appear here...';
  color: var(--muted);
  font-style: italic;
  font-family: inherit;
}
.chunk-row{
  display: flex;
  gap: 12px;
}
.chunk-row > div{
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.input-sm{
  padding: 7px 10px;
  font-size: 13px;
}
.muted{
  color: var(--muted);
  font-size: 11px;
}

/* ---- Progress bar ---- */
.tr-progress-wrap{
  margin-top: 10px;
}
.tr-progress-track{
  width: 100%;
  height: 8px;
  background: rgba(15,23,42,0.10);
  border-radius: 999px;
  overflow: hidden;
}
.tr-progress-bar{
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 999px;
  transition: width 0.35s ease;
}
.tr-progress-label{
  font-size: 11px;
  color: var(--muted);
  margin-top: 5px;
  text-align: right;
}

/* ---- Abort / danger button ---- */
.btn.danger{
  border-color: rgba(225,29,72,0.35);
  background: rgba(225,29,72,0.10);
  color: var(--danger);
  margin-top: 6px;
  width: 100%;
}
.btn.danger:hover{
  background: rgba(225,29,72,0.18);
}



/* ============================================================
   Floating log panel
   ============================================================ */
.log-fab-group {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}
.log-fab {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.92);
  box-shadow: 0 4px 16px rgba(2,6,23,0.13);
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
}
.log-fab:hover { background: rgba(255,255,255,1); transform: scale(1.07); }
.log-fab.danger {
  border-color: rgba(225,29,72,0.35);
  background: rgba(225,29,72,0.10);
  color: var(--danger);
}
.log-fab.danger:hover { background: rgba(225,29,72,0.20); }

.log-panel {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 560px;
  max-width: calc(100vw - 40px);
  height: 340px;
  background: rgba(15,23,42,0.96);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(2,6,23,0.35);
  display: flex;
  flex-direction: column;
  z-index: 999;
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.log-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.log-panel-title {
  font-size: 12px;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.log-panel-actions {
  display: flex;
  gap: 6px;
}
.log-btn {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.65);
  border-radius: 8px;
  padding: 3px 10px;
  font-size: 11px;
  cursor: pointer;
}
.log-btn:hover { background: rgba(255,255,255,0.15); color: #fff; }

.log-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  font-family: ui-monospace, 'Cascadia Code', 'Fira Mono', monospace;
  font-size: 11.5px;
  line-height: 1.55;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.18) transparent;
}
.log-body::-webkit-scrollbar { width: 6px; }
.log-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.18); border-radius: 999px; }

.log-line { word-break: break-all; padding: 1px 0; }
.log-info    { color: rgba(200,210,230,0.85); }
.log-debug   { color: rgba(140,160,190,0.60); }
.log-warn    { color: #fbbf24; }
.log-error   { color: #f87171; }