:root {
  --bg: #f0f2f8;
  --bg-secondary: #f6f7fb;
  --surface: rgba(255,255,255,.75);
  --surface-solid: #ffffff;
  --surface2: rgba(99,102,241,.04);
  --surface3: rgba(99,102,241,.06);
  --border: rgba(99,102,241,.1);
  --border-light: rgba(99,102,241,.18);
  --text: #1a1d2e;
  --text-dim: #4a4e6a;
  --text-muted: #8b8fa8;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99,102,241,.1);
  --accent-glow-strong: rgba(99,102,241,.18);
  --cyan: #06b6d4;
  --cyan-glow: rgba(6,182,212,.1);
  --green: #10b981;
  --green-dim: rgba(16,185,129,.08);
  --orange: #f59e0b;
  --red: #ef4444;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 1px 4px rgba(99,102,241,.06), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(99,102,241,.08), 0 2px 6px rgba(0,0,0,.04);
  /* sidebar */
  --sb-bg: linear-gradient(180deg,#f5f6fc 0%,#eceef8 100%);
  --sb-surface: rgba(99,102,241,.05);
  --sb-border: rgba(99,102,241,.1);
  --sb-text: #1a1d2e;
  --sb-text-dim: #4a4e6a;
  --sb-text-muted: #8b8fa8;
  --sb-hover: rgba(99,102,241,.06);
  --sb-active: rgba(99,102,241,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}

/* ── App page container — FIX: fill viewport ── */
#appPage{height:100vh;display:flex;flex-direction:column}

/* ── Layout ── */
.app-body{display:flex;flex:1;overflow:hidden;position:relative}

/* ── Sidebar ── */
.sidebar{width:260px;flex-shrink:0;background:var(--sb-bg);border-right:1px solid var(--sb-border);display:flex;flex-direction:column;transition:margin-left .25s ease;overflow:hidden;z-index:5;position:relative}
.sidebar::after{content:'';position:absolute;top:0;right:0;width:1px;height:100%;background:linear-gradient(180deg,rgba(99,102,241,.3) 0%,rgba(6,182,212,.1) 50%,transparent 100%);pointer-events:none}
.sidebar.collapsed{margin-left:-260px}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:20px 16px 16px;flex-shrink:0}
.sidebar-logo{font-size:18px;color:var(--accent-light);font-weight:700;line-height:1;text-shadow:0 0 12px rgba(99,102,241,.5)}
.sidebar-app-name{font-size:15px;font-weight:700;color:var(--sb-text);flex:1;letter-spacing:-.3px}
.sidebar-collapse-btn{background:none;border:none;color:var(--sb-text-muted);cursor:pointer;font-size:18px;padding:2px 6px;border-radius:4px;transition:color .2s;line-height:1}
.sidebar-collapse-btn:hover{color:var(--sb-text)}
.sidebar-section{padding:4px 12px 8px;flex-shrink:0}
.sidebar-section.sidebar-sessions{flex:1;display:flex;flex-direction:column;overflow:hidden;padding-bottom:12px}
.sidebar-section-title{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--sb-text-muted);padding:12px 4px 6px;user-select:none}

/* ── Sidebar Tabs ── */
.sidebar-tabs{display:flex;gap:2px;padding:0 12px 6px;flex-shrink:0;background:transparent}
.sidebar-tab{flex:1;padding:7px 0;text-align:center;font-size:12px;font-weight:600;color:var(--sb-text-muted);border:none;background:transparent;border-radius:6px;cursor:pointer;transition:all .15s;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:5px}
.sidebar-tab:hover{color:var(--sb-text-dim);background:var(--sb-hover)}
.sidebar-tab.active{color:var(--accent);background:var(--sb-active);box-shadow:0 0 8px rgba(99,102,241,.06)}
.sidebar-tab svg{width:14px;height:14px;flex-shrink:0}
.sidebar-tab-content{flex:1;display:flex;flex-direction:column;overflow:hidden}
.sidebar-tab-panel{display:none;flex:1;flex-direction:column;overflow:hidden;padding:0 12px 12px}
.sidebar-tab-panel.active{display:flex}

/* ── Article feedback toast ── */
.article-feedback{position:fixed;top:60px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;padding:10px 24px;border-radius:8px;font-size:13px;font-weight:500;z-index:200;box-shadow:0 4px 16px rgba(99,102,241,.25);animation:feedbackIn .3s ease;pointer-events:none}
@keyframes feedbackIn{from{opacity:0;transform:translateX(-50%) translateY(-8px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
.article-feedback.fade-out{animation:feedbackOut .3s ease forwards}
@keyframes feedbackOut{to{opacity:0;transform:translateX(-50%) translateY(-8px)}}

/* ── Scene cards ── */
.scene-list{display:flex;flex-direction:column;gap:3px}
.scene-card{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;cursor:pointer;transition:all .15s;color:var(--sb-text-dim);border:1px solid transparent}
.scene-card:hover{background:var(--sb-hover);color:var(--sb-text)}
.scene-card.active{background:var(--sb-active);color:var(--accent);border-color:rgba(99,102,241,.2);box-shadow:0 0 12px rgba(99,102,241,.08);font-weight:600}
.scene-icon{font-size:17px;flex-shrink:0;line-height:1}
.scene-label{font-size:13px;font-weight:500}

/* ── Article section ── */
.article-actions{display:flex;flex-direction:column;gap:5px;margin-bottom:8px}
.btn-sidebar{width:100%;padding:7px 0;background:var(--sb-surface);border:1px solid var(--sb-border);color:var(--sb-text-dim);border-radius:6px;cursor:pointer;font-size:12px;font-weight:500;font-family:inherit;transition:all .15s;text-align:center}
.btn-sidebar:hover{background:var(--sb-hover);border-color:rgba(99,102,241,.18);color:var(--sb-text)}
.article-keyword-row{display:flex;gap:4px}
.article-keyword-input{flex:1;padding:6px 10px;border:1px solid var(--sb-border);border-radius:6px;font-size:12px;color:var(--sb-text);background:rgba(255,255,255,.6);outline:none;font-family:inherit}
.article-keyword-input::placeholder{color:var(--sb-text-muted)}
.article-keyword-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(99,102,241,.15)}
.btn-sidebar-sm{padding:6px 12px;background:var(--accent);border:none;color:#fff;border-radius:6px;cursor:pointer;font-size:11px;font-weight:600;font-family:inherit;transition:all .15s;white-space:nowrap}
.btn-sidebar-sm:hover{background:var(--accent-light);box-shadow:0 0 8px rgba(99,102,241,.3)}

/* ── Doc list ── */
.doc-list{overflow-y:auto;padding:2px 0;max-height:200px}
.doc-item{display:flex;align-items:center;gap:8px;padding:7px 10px;cursor:pointer;transition:all .12s;border-radius:6px;font-size:12px;color:var(--sb-text-dim);margin:1px 0}
.doc-item:hover{background:var(--sb-hover);color:var(--sb-text)}
.doc-item.active{background:var(--sb-active);color:var(--accent)}
.doc-item .doc-icon{font-size:13px;flex-shrink:0}
.doc-item .doc-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc-item .doc-size{font-size:10px;color:var(--sb-text-muted);flex-shrink:0;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ── Session list ── */
.session-list{flex:1;overflow-y:auto;padding:2px 0}
.session-item{display:flex;flex-direction:column;gap:2px;padding:9px 12px;cursor:pointer;transition:all .12s;border-radius:8px;position:relative;margin:1px 0}
.session-item:hover{background:var(--sb-hover)}
.session-item.active{background:var(--sb-active);box-shadow:inset 0 0 0 1px rgba(99,102,241,.2)}
.session-title{font-size:13px;font-weight:500;color:var(--sb-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-right:18px}
.session-meta{font-size:10px;color:var(--sb-text-muted)}
.session-delete{position:absolute;right:8px;top:50%;transform:translateY(-50%);opacity:0;background:none;border:none;color:var(--sb-text-muted);cursor:pointer;font-size:12px;padding:2px 4px;border-radius:4px}
.session-item:hover .session-delete{opacity:.6}
.session-delete:hover{opacity:1!important;color:var(--red)}
.history-empty{text-align:center;padding:32px 16px;color:var(--sb-text-muted);font-size:12px}

/* ── Main area ── */
.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-secondary)}

/* ── Main header ── */
.main-header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:52px;background:rgba(255,255,255,.7);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);flex-shrink:0;gap:12px}
.main-header-left{display:flex;align-items:center;gap:8px}
.current-scene-label{font-size:14px;font-weight:600;color:var(--text)}
.main-header-right{display:flex;align-items:center;gap:10px}
.btn-new-session{padding:6px 16px;background:var(--accent);border:none;color:#fff;border-radius:7px;cursor:pointer;font-size:12px;font-weight:600;font-family:inherit;transition:all .2s;white-space:nowrap;box-shadow:0 0 12px rgba(99,102,241,.25)}
.btn-new-session:hover{background:var(--accent-light);box-shadow:0 0 20px rgba(99,102,241,.4)}
.usage-badge{font-size:12px;color:var(--text-dim);background:var(--surface2);padding:4px 10px;border-radius:6px;cursor:default;white-space:nowrap;border:1px solid var(--border)}
.header-user{font-size:13px;color:var(--text-dim);font-weight:500;white-space:nowrap}
.btn-logout{background:none;border:1px solid var(--border);padding:5px 12px;border-radius:6px;cursor:pointer;font-size:12px;color:var(--text-muted);font-family:inherit;transition:all .15s;white-space:nowrap}
.btn-logout:hover{border-color:var(--border-light);color:var(--text-dim)}
.sidebar-open-btn{background:none;border:none;font-size:18px;cursor:pointer;color:var(--text-dim);padding:4px 6px;border-radius:6px;display:none;line-height:1}
.sidebar-open-btn:hover{color:var(--text);background:var(--surface2)}
.sidebar.collapsed~.main-area .sidebar-open-btn{display:inline-flex}

/* ── Chat area ── */
.chat-column{flex:1;display:flex;flex-direction:column;overflow:hidden}
.chat-container{flex:1;overflow-y:auto;padding:24px 20px}
.chat-inner{max-width:900px;margin:0 auto;width:100%}

/* ── Welcome ── */
.welcome{text-align:center;padding:min(12vh,100px) 20px 30px}
.welcome-icon{font-size:36px;margin-bottom:14px;color:var(--accent-light);text-shadow:0 0 20px rgba(99,102,241,.4);line-height:1}
.welcome h2{font-size:22px;font-weight:700;margin-bottom:8px;background:linear-gradient(135deg,var(--accent-light),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.welcome p{color:var(--text-muted);font-size:14px}
.quick-row{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;padding:0 20px 30px}
.quick-chip{background:var(--surface);border:1px solid var(--border);padding:8px 16px;border-radius:20px;font-size:13px;cursor:pointer;transition:all .2s;color:var(--text-dim);white-space:nowrap;backdrop-filter:blur(4px)}
.quick-chip:hover{border-color:var(--accent);color:var(--accent-light);background:var(--accent-glow);transform:translateY(-1px);box-shadow:0 4px 12px rgba(99,102,241,.15)}

/* ── Gallery ── */
#galleryArea{display:flex;flex-direction:column;gap:20px}
.gallery-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px;box-shadow:var(--shadow);backdrop-filter:blur(8px)}
.gallery-card .card-prompt{font-size:13px;color:var(--text-dim);margin-bottom:12px;line-height:1.5}
.gallery-card .card-prompt strong{color:var(--text);font-weight:600}
.gallery-card .card-images{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.gallery-card .card-image{position:relative;border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:transform .2s,box-shadow .2s;aspect-ratio:1/1;background:var(--surface2)}
.gallery-card .card-image:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.gallery-card .card-image img{width:100%;height:100%;object-fit:cover}
.gallery-card .card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:12px;font-size:11px;color:var(--text-muted)}
.gallery-card .card-actions{display:flex;gap:6px}
.gallery-card .card-actions button{background:none;border:1px solid var(--border);padding:4px 10px;border-radius:6px;font-size:11px;cursor:pointer;color:var(--text-dim);transition:all .15s}
.gallery-card .card-actions button:hover{border-color:var(--accent);color:var(--accent-light)}

/* ── Loading card ── */
.loading-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px 20px;text-align:center;box-shadow:var(--shadow);backdrop-filter:blur(8px)}
.loading-card .spinner{width:36px;height:36px;border:2.5px solid var(--surface3);border-top-color:var(--accent-light);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 14px}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-card .loading-text{font-size:14px;color:var(--text-dim)}
.loading-card .loading-prompt{font-size:12px;color:var(--text-muted);margin-top:8px;max-width:400px;margin-left:auto;margin-right:auto}

/* ── Error card ── */
.error-card{background:rgba(239,68,68,.06);border:1px solid rgba(239,68,68,.15);border-radius:var(--radius-lg);padding:16px 20px;color:var(--red);font-size:13px}

/* ── Input area ── */
.input-area{border-top:1px solid var(--border);background:rgba(255,255,255,.7);backdrop-filter:blur(12px);padding:14px 20px;flex-shrink:0}
.input-inner{max-width:900px;margin:0 auto}
.input-row{display:flex;gap:10px;align-items:flex-end}
.input-row textarea{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;font-size:14px;color:var(--text);resize:none;outline:none;font-family:inherit;line-height:1.5;max-height:120px;transition:border-color .2s,box-shadow .2s}
.input-row textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(99,102,241,.15)}
.input-row textarea::placeholder{color:var(--text-muted)}
.btn-send{background:var(--accent);border:none;color:#fff;padding:10px 24px;border-radius:var(--radius);cursor:pointer;font-size:14px;font-weight:600;font-family:inherit;white-space:nowrap;transition:all .2s;flex-shrink:0;box-shadow:0 0 14px rgba(99,102,241,.3)}
.btn-send:hover{background:var(--accent-light);box-shadow:0 0 24px rgba(99,102,241,.45)}
.btn-send:active{transform:scale(.97)}
.btn-send:disabled{opacity:.35;cursor:not-allowed;box-shadow:none}

/* ── Modal ── */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.35);z-index:100;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(6px)}
.modal-card{background:var(--surface-solid);border:1px solid var(--border);border-radius:var(--radius-lg);max-width:90vw;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(0,0,0,.12)}
.modal-card.modal-image{width:auto;min-width:400px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:15px;font-weight:600}
.modal-close{background:none;border:none;font-size:18px;cursor:pointer;color:var(--text-dim);padding:4px;border-radius:4px}
.modal-close:hover{color:var(--text)}
.modal-body{padding:20px;overflow-y:auto;text-align:center}
.modal-body img{max-width:100%;max-height:70vh;border-radius:var(--radius);box-shadow:var(--shadow-md)}
.modal-prompt{margin-top:12px;font-size:13px;color:var(--text-dim);line-height:1.5}
.modal-footer{padding:12px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end}
.btn-download{background:var(--accent);color:#fff;padding:8px 20px;border-radius:8px;text-decoration:none;font-size:13px;font-weight:600;transition:all .15s;box-shadow:0 0 8px rgba(99,102,241,.25)}
.btn-download:hover{opacity:.9;box-shadow:0 0 16px rgba(99,102,241,.4)}

/* (legacy sidebar tabs / doc preview removed — now handled by new sidebar layout) */
.upload-btn{cursor:pointer}

/* ── Doc preview (retained for pipeline use) ── */
.doc-preview-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);margin-bottom:20px}
.doc-preview-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:10px}
.doc-preview-header h3{font-size:15px;font-weight:700;flex:1;min-width:200px}
.doc-preview-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.btn-generate{background:var(--accent);border:none;color:#fff;padding:8px 20px;border-radius:8px;cursor:pointer;font-size:13px;font-weight:600;font-family:inherit;white-space:nowrap;transition:opacity .15s}
.btn-generate:hover{opacity:.9}
.btn-generate:disabled{opacity:.45;cursor:not-allowed}
.doc-preview-body{display:flex;gap:0;max-height:400px;overflow:hidden}
.doc-content-col,.doc-prompt-col{flex:1;padding:16px 20px;overflow-y:auto;max-height:400px}
.doc-content-col{border-right:1px solid var(--border)}
.doc-content-col h4,.doc-prompt-col h4{font-size:13px;font-weight:600;color:var(--text-dim);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.btn-small{background:none;border:1px solid var(--border);padding:2px 8px;border-radius:4px;font-size:11px;cursor:pointer;color:var(--text-dim)}
.btn-small:hover{border-color:var(--accent);color:var(--accent)}
.doc-text{font-size:12px;line-height:1.8;color:var(--text-dim);white-space:pre-wrap;word-break:break-all}
.doc-prompt{font-size:11px;line-height:1.7;color:var(--text-muted);white-space:pre-wrap;word-break:break-all;font-family:'SF Mono',Consolas,monospace;background:var(--bg);padding:10px;border-radius:8px}
.doc-prompt-edit{width:100%;min-height:200px;font-size:11px;line-height:1.7;font-family:'SF Mono',Consolas,monospace;background:var(--bg);border:1px solid var(--accent);border-radius:8px;padding:10px;color:var(--text);resize:vertical;outline:none}

/* ── Workflow Pipeline Panel ── */
.task-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:20px;overflow:hidden;box-shadow:var(--shadow)}

/* Header with progress bar */
.task-panel-header{padding:16px 20px 12px;display:flex;flex-direction:column;gap:10px}
.task-panel-header .header-row{display:flex;align-items:center;justify-content:space-between}
.task-panel-header h3{font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px}
.task-panel-header .task-badge{font-size:11px;padding:2px 8px;border-radius:10px;font-weight:600}
.task-badge.running{background:rgba(59,130,246,.12);color:#3b82f6;animation:badgePulse 2s infinite}
.task-badge.done{background:rgba(16,185,129,.12);color:#10b981}
.task-badge.partial{background:rgba(239,68,68,.12);color:#ef4444}

/* Overall progress bar */
.progress-bar-wrap{height:6px;background:var(--surface2);border-radius:3px;overflow:hidden}
.progress-bar-fill{height:100%;border-radius:3px;background:linear-gradient(90deg,var(--accent),#3b82f6);transition:width .6s ease;position:relative}
.progress-bar-fill.has-error{background:linear-gradient(90deg,var(--accent),#ef4444)}
.progress-bar-fill::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}
@keyframes shimmer{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}
.progress-stats{display:flex;justify-content:space-between;font-size:11px;color:var(--text-muted);margin-top:2px}

/* Workflow segments with left timeline */
.task-segments{padding:8px 20px 12px;position:relative}

.task-segment{display:flex;align-items:stretch;gap:0;padding:0;position:relative;min-height:56px}

/* Timeline: left connector line + node circle */
.seg-timeline{width:36px;flex-shrink:0;display:flex;flex-direction:column;align-items:center;position:relative}
.seg-node{width:28px;height:28px;border-radius:50%;border:2.5px solid var(--border);background:var(--surface-solid);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--text-muted);z-index:2;transition:all .3s;flex-shrink:0}
.seg-line{flex:1;width:2px;background:var(--border);margin:2px 0;transition:background .3s}
.task-segment:last-child .seg-line{display:none}

/* Node states */
.task-segment[data-status="generating"] .seg-node{border-color:#3b82f6;background:#3b82f6;color:#fff;box-shadow:0 0 0 4px rgba(59,130,246,.2);animation:nodePulse 1.5s infinite}
.task-segment[data-status="completed"] .seg-node{border-color:var(--green);background:var(--green);color:#fff}
.task-segment[data-status="completed"] .seg-line{background:var(--green)}
.task-segment[data-status="failed"] .seg-node{border-color:var(--red);background:var(--red);color:#fff}
.task-segment[data-status="paused"] .seg-node{border-color:var(--orange);background:var(--surface-solid);color:var(--orange)}
.task-segment[data-status="paused"] .seg-line{background:var(--orange);opacity:.4}

@keyframes nodePulse{0%,100%{box-shadow:0 0 0 4px rgba(59,130,246,.2)}50%{box-shadow:0 0 0 8px rgba(59,130,246,.1)}}
@keyframes badgePulse{0%,100%{opacity:1}50%{opacity:.7}}

/* Segment content area */
.seg-content{flex:1;padding:4px 0 12px 8px;display:flex;flex-direction:column;gap:4px;min-width:0}
.seg-header{display:flex;align-items:center;justify-content:space-between;gap:8px}
.seg-title{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.seg-meta{font-size:11px;color:var(--text-muted);display:flex;align-items:center;gap:6px;flex-shrink:0}
.seg-timer{font-variant-numeric:tabular-nums}

/* Status label */
.seg-status-label{font-size:11px;padding:1px 6px;border-radius:4px;font-weight:500}
.seg-status-label.pending{color:var(--text-muted);background:var(--surface2)}
.seg-status-label.generating{color:#3b82f6;background:rgba(59,130,246,.1)}
.seg-status-label.completed{color:var(--green);background:var(--green-dim)}
.seg-status-label.failed{color:var(--red);background:rgba(239,68,68,.1)}

/* Error detail */
.seg-error{font-size:11px;color:var(--red);background:rgba(239,68,68,.06);padding:4px 8px;border-radius:4px;margin-top:2px;word-break:break-all}

/* Retry button */
.seg-retry{background:none;border:1px solid var(--red);color:var(--red);padding:3px 10px;border-radius:6px;font-size:11px;cursor:pointer;font-weight:500;transition:all .2s;flex-shrink:0}
.seg-retry:hover{background:var(--red);color:#fff}

/* Segment detail row: size tag + prompt toggle */
.seg-detail{display:flex;align-items:center;gap:8px;margin-top:2px}
.seg-size-tag{font-size:10px;padding:1px 6px;border-radius:4px;background:var(--surface2);color:var(--text-muted);font-family:'SF Mono',Consolas,monospace}
.seg-prompt-toggle{font-size:11px;color:var(--accent);cursor:pointer;user-select:none}
.seg-prompt-toggle:hover{text-decoration:underline}
.seg-prompt-box{margin-top:4px;max-height:200px;overflow-y:auto;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:8px 10px}
.seg-prompt-box pre{font-size:11px;line-height:1.6;color:var(--text-dim);white-space:pre-wrap;word-break:break-word;margin:0;font-family:'SF Mono',Consolas,monospace}

/* Thumbnail — 竖版长图段落预览 */
.seg-thumb-wrap{margin-top:6px;display:flex;align-items:flex-start;gap:8px}
.seg-thumb{width:120px;height:180px;object-fit:cover;border-radius:8px;border:1px solid var(--border);cursor:pointer;transition:transform .2s;background:var(--surface2)}
.seg-thumb:hover{transform:scale(1.03)}
.seg-thumb-loading{width:120px;height:180px;border-radius:8px;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--text-muted)}

/* Result area */
.task-panel-result{padding:16px 20px;border-top:1px solid var(--border);text-align:center}
.task-panel-result img{max-width:100%;max-height:400px;border-radius:8px;border:1px solid var(--border);cursor:pointer}
.task-panel-result .result-actions{margin-top:10px;display:flex;gap:8px;justify-content:center}
.task-panel-result .stitch-status{font-size:13px;color:var(--text-dim);display:flex;align-items:center;justify-content:center;gap:8px}

/* ── Login Page ── */
.login-page{display:none;align-items:center;justify-content:center;min-height:100vh;background:var(--bg);position:fixed;inset:0;z-index:1000}
.login-page::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(99,102,241,.08) 0%,transparent 50%),radial-gradient(ellipse at 70% 80%,rgba(6,182,212,.05) 0%,transparent 50%);pointer-events:none}
.login-card{background:var(--surface-solid);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:40px;width:380px;max-width:90vw;box-shadow:var(--shadow-md),0 0 40px rgba(99,102,241,.08);text-align:center;position:relative;z-index:1}
.login-logo{font-size:36px;margin-bottom:10px;text-shadow:0 0 20px rgba(99,102,241,.5)}
.login-card h2{font-size:20px;font-weight:700;margin-bottom:4px;background:linear-gradient(135deg,var(--accent-light),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.login-subtitle{color:var(--text-muted);font-size:13px;margin-bottom:28px}
.login-field{text-align:left;margin-bottom:16px}
.login-field label{display:block;font-size:13px;font-weight:600;color:var(--text-dim);margin-bottom:6px}
.login-field input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;color:var(--text);background:rgba(255,255,255,.6);outline:none;transition:border-color .2s,box-shadow .2s;font-family:inherit;box-sizing:border-box}
.login-field input:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(99,102,241,.15)}
.login-error{color:var(--red);font-size:13px;margin-bottom:12px;padding:8px;background:rgba(239,68,68,.08);border-radius:6px}
.login-btn{width:100%;padding:12px;background:var(--accent);border:none;color:#fff;border-radius:var(--radius);cursor:pointer;font-size:15px;font-weight:600;font-family:inherit;transition:all .2s;margin-top:8px;box-shadow:0 0 16px rgba(99,102,241,.3)}
.login-btn:hover{background:var(--accent-light);box-shadow:0 0 28px rgba(99,102,241,.45)}
.login-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}

/* ── History list (for /api/history images) ── */
.history-list{flex:1;overflow-y:auto;padding:6px 0}
.history-item{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;transition:all .12s;border-radius:6px;margin:1px 0}
.history-item:hover{background:var(--surface2)}
.history-item img{width:44px;height:44px;object-fit:cover;border-radius:6px;flex-shrink:0}
.history-item .history-name{flex:1;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-dim)}
.history-delete{opacity:0;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:13px;padding:2px 4px;border-radius:4px;transition:all .12s;flex-shrink:0}
.history-item:hover .history-delete{opacity:.6}
.history-delete:hover{opacity:1!important;color:var(--red)}

/* ── Responsive ── */
@media(max-width:768px){
  .sidebar{width:240px}
  .sidebar.collapsed{margin-left:-240px}
  .welcome{padding:50px 16px 20px}
  .welcome h2{font-size:18px}
  .quick-row{padding:0 16px 20px}
  .chat-container{padding:12px}
  .gallery-card .card-images{grid-template-columns:1fr}
  .doc-preview-body{flex-direction:column}
  .doc-content-col{border-right:none;border-bottom:1px solid var(--border)}
  .login-card{padding:28px 20px}
  .main-header{padding:0 12px}
  .main-header-right{gap:6px}
  .btn-new-session{padding:5px 10px;font-size:11px}
}