@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600&family=DM+Sans:wght@300;400;500&family=JetBrains+Mono:wght@400;500&display=swap');

*{margin:0;padding:0;box-sizing:border-box;}

:root{
  --bg:#f5f0e8;
  --sidebar:#2c1f14;
  --sidebar-hover:rgba(255,255,255,0.05);
  --sidebar-active:rgba(193,122,74,0.15);
  --sidebar-active-border:rgba(193,122,74,0.3);
  --sidebar-text:#a89a88;
  --sidebar-text-active:#e8c9a8;
  --sidebar-label:#7a6a58;
  --accent:#c17a4a;
  --accent-light:#f0e8d8;
  --card:#ffffff;
  --card-border:#ddd0be;
  --text:#1a1209;
  --text-2:#5a4a38;
  --text-3:#a89a88;
  --input-bg:#f5f0e8;
  --tag-bg:#f0e8d8;
  --tag-border:#d4c4ae;
  --tag-text:#7a6a58;
  --divider:#ecdecb;
  --danger:#c0392b;
  --danger-bg:#fdf0ee;
}

body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;}

.app{display:flex;min-height:100vh;}

/* SIDEBAR */
.sidebar{width:230px;flex-shrink:0;background:var(--sidebar);padding:24px 14px;display:flex;flex-direction:column;gap:2px;position:sticky;top:0;height:100vh;overflow-y:auto;}
.logo{font-family:'Playfair Display',serif;font-size:22px;color:#f5f0e8;letter-spacing:0.02em;margin-bottom:32px;padding-left:8px;}
.logo span{color:var(--accent);}
.nav-label{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:0.2em;color:var(--sidebar-label);text-transform:uppercase;padding:0 8px;margin:18px 0 6px;}
.nav-item{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:8px;font-size:13px;color:var(--sidebar-text);cursor:pointer;border:0.5px solid transparent;transition:all 0.15s;margin-bottom:1px;}
.nav-item i{font-size:15px;width:16px;flex-shrink:0;}
.nav-item:hover{background:var(--sidebar-hover);color:#d4c4b0;}
.nav-item.active{background:var(--sidebar-active);border-color:var(--sidebar-active-border);color:var(--sidebar-text-active);}
.nav-item .file-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;}
.nav-item .del-btn{opacity:0;font-size:12px;color:var(--sidebar-label);background:none;border:none;cursor:pointer;padding:0 2px;line-height:1;}
.nav-item:hover .del-btn{opacity:1;}
.nav-item .del-btn:hover{color:#e87a6a;}

.sidebar-footer{margin-top:auto;padding-top:16px;border-top:0.5px solid rgba(255,255,255,0.08);}
.api-key-box{background:rgba(255,255,255,0.05);border:0.5px solid rgba(255,255,255,0.1);border-radius:10px;padding:12px 14px;}
.api-key-label{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:0.18em;color:var(--sidebar-label);text-transform:uppercase;margin-bottom:6px;}
.api-key-input{width:100%;background:rgba(255,255,255,0.06);border:0.5px solid rgba(255,255,255,0.12);border-radius:6px;padding:7px 9px;font-family:'JetBrains Mono',monospace;font-size:11px;color:#d4c4b0;outline:none;transition:border-color 0.15s;}
.api-key-input:focus{border-color:rgba(193,122,74,0.5);}
.api-key-input::placeholder{color:var(--sidebar-label);}

/* MAIN */
.main{flex:1;padding:36px 32px;min-width:0;display:flex;flex-direction:column;}
.page{display:none;flex-direction:column;gap:20px;}
.page.active{display:flex;}

.page-header{margin-bottom:4px;}
.page-header h1{font-family:'Playfair Display',serif;font-size:26px;font-weight:500;color:var(--text);letter-spacing:-0.01em;margin-bottom:6px;}
.page-header p{font-size:13px;color:var(--text-3);}

/* CARDS */
.card{background:var(--card);border:0.5px solid var(--card-border);border-radius:14px;padding:20px 22px;}
.card-label{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:0.2em;color:var(--text-3);text-transform:uppercase;margin-bottom:12px;}

/* STATS */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.stat-card{background:var(--card);border:0.5px solid var(--card-border);border-radius:12px;padding:18px 20px;}
.stat-label{font-family:'JetBrains Mono',monospace;font-size:9px;letter-spacing:0.2em;color:var(--text-3);text-transform:uppercase;margin-bottom:10px;}
.stat-value{font-family:'Playfair Display',serif;font-size:28px;color:var(--text);line-height:1;}
.stat-sub{font-size:11px;color:var(--text-3);margin-top:5px;}

/* UPLOAD */
.upload-zone{border:1.5px dashed var(--card-border);border-radius:12px;padding:32px;text-align:center;cursor:pointer;background:rgba(255,255,255,0.5);transition:all 0.2s;margin-bottom:14px;}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent);background:#fffcf8;}
.upload-zone input{display:none;}
.upload-icon{font-size:28px;color:var(--text-3);margin-bottom:12px;}
.upload-zone h3{font-family:'Playfair Display',serif;font-size:16px;font-weight:500;color:var(--text);margin-bottom:4px;}
.upload-zone .hint{font-size:12px;color:var(--text-3);margin-bottom:14px;}
.file-types{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;}
.badge{font-family:'JetBrains Mono',monospace;font-size:10px;background:var(--tag-bg);border:0.5px solid var(--tag-border);border-radius:5px;padding:3px 9px;color:var(--tag-text);}

/* STATUS BAR */
.status-bar{display:none;padding:10px 14px;border-radius:8px;font-family:'JetBrains Mono',monospace;font-size:11px;background:var(--accent-light);border:0.5px solid var(--tag-border);color:var(--text-2);margin-top:10px;}

/* BUTTONS */
.btn{font-family:'DM Sans',sans-serif;font-size:13px;font-weight:500;padding:10px 18px;border-radius:9px;cursor:pointer;transition:all 0.15s;display:inline-flex;align-items:center;gap:7px;border:none;}
.btn-dark{background:var(--sidebar);color:#f5f0e8;}
.btn-dark:hover{background:#3d2e1f;}
.btn-dark:disabled{opacity:0.4;cursor:not-allowed;}
.btn-outline{background:transparent;color:var(--text-2);border:0.5px solid var(--card-border);}
.btn-outline:hover{background:var(--accent-light);}
.btn-full{width:100%;justify-content:center;}
.btn-sm{padding:6px 12px;font-size:12px;}

/* SEARCH/QUERY */
.query-row{display:flex;gap:8px;align-items:stretch;}
.query-input{flex:1;background:var(--input-bg);border:0.5px solid var(--card-border);border-radius:9px;padding:10px 14px;font-family:'DM Sans',sans-serif;font-size:14px;color:var(--text);outline:none;transition:border-color 0.15s;}
.query-input:focus{border-color:var(--accent);}
.query-input::placeholder{color:var(--text-3);}

/* ANSWER */
.answer-block{margin-top:16px;padding-top:16px;border-top:0.5px solid var(--divider);}
.answer-text{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:12px;}
.sources-row{display:flex;flex-wrap:wrap;gap:6px;}
.source-chip{display:inline-flex;align-items:center;gap:5px;background:var(--tag-bg);border:0.5px solid var(--tag-border);border-radius:6px;padding:4px 10px;font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--tag-text);}
.source-chip i{font-size:12px;}
.confidence-badge{font-family:'JetBrains Mono',monospace;font-size:10px;padding:2px 8px;border-radius:4px;margin-left:8px;}
.conf-high{background:#eaf6ee;color:#2a7a4a;}
.conf-medium{background:#fef6e4;color:#8a6010;}
.conf-low{background:#fdf0ee;color:#c0392b;}

/* FILE CARDS */
.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;}
.file-card{background:var(--card);border:0.5px solid var(--card-border);border-radius:12px;overflow:hidden;transition:border-color 0.15s;}
.file-card:hover{border-color:var(--accent);}
.file-thumb{width:100%;height:100px;object-fit:cover;background:var(--accent-light);display:flex;align-items:center;justify-content:center;font-size:32px;color:var(--text-3);}
.file-thumb img{width:100%;height:100%;object-fit:cover;}
.file-info{padding:12px 14px;}
.file-name{font-size:12px;font-weight:500;color:var(--text);margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.file-type{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--text-3);text-transform:uppercase;letter-spacing:0.1em;}
.file-meta{font-size:11px;color:var(--text-3);margin-top:6px;}

/* SUMMARY */
.summary-list{display:flex;flex-direction:column;gap:14px;}
.summary-item{background:var(--card);border:0.5px solid var(--card-border);border-radius:12px;padding:18px 20px;}
.summary-filename{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:0.1em;color:var(--accent);text-transform:uppercase;margin-bottom:8px;display:flex;align-items:center;gap:6px;}
.summary-text{font-size:13px;color:var(--text-2);line-height:1.75;margin-bottom:12px;}
.entity-row{display:flex;flex-wrap:wrap;gap:5px;}
.entity-chip{font-family:'JetBrains Mono',monospace;font-size:10px;background:var(--tag-bg);border:0.5px solid var(--tag-border);border-radius:4px;padding:2px 8px;color:var(--tag-text);}

/* CONNECTIONS */
.conn-list{display:flex;flex-direction:column;gap:12px;}
.conn-item{background:var(--card);border:0.5px solid var(--card-border);border-radius:12px;padding:16px 18px;display:flex;gap:14px;align-items:flex-start;}
.conn-icon{width:36px;height:36px;border-radius:50%;background:var(--accent-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent);font-size:16px;}
.conn-docs{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--accent);margin-bottom:5px;}
.conn-text{font-size:13px;color:var(--text-2);line-height:1.6;}

/* EMPTY STATE */
.empty-state{text-align:center;padding:48px 20px;color:var(--text-3);}
.empty-state i{font-size:36px;display:block;margin-bottom:12px;opacity:0.4;}
.empty-state p{font-size:13px;}

/* CHAT HISTORY */
.chat-history{display:flex;flex-direction:column;gap:12px;max-height:420px;overflow-y:auto;margin-bottom:14px;padding-right:4px;}
.chat-q{background:var(--accent-light);border-radius:10px;padding:10px 14px;font-size:13px;color:var(--text-2);align-self:flex-end;max-width:80%;border:0.5px solid var(--tag-border);}
.chat-a{background:var(--card);border:0.5px solid var(--card-border);border-radius:10px;padding:12px 16px;font-size:13px;color:var(--text-2);line-height:1.75;}
.chat-a .src{margin-top:8px;display:flex;flex-wrap:wrap;gap:4px;}

/* DIVIDER */
.or-divider{text-align:center;position:relative;margin:12px 0;}
.or-divider::before{content:'';position:absolute;top:50%;left:0;right:0;height:0.5px;background:var(--card-border);}
.or-divider span{background:var(--bg);position:relative;padding:0 10px;font-size:11px;color:var(--text-3);font-family:'JetBrains Mono',monospace;}

footer{text-align:center;padding:20px;font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--text-3);letter-spacing:0.12em;border-top:0.5px solid var(--card-border);margin-top:auto;}

@media(max-width:768px){
  .sidebar{display:none;}
  .main{padding:16px;}
  .stats-row{grid-template-columns:1fr 1fr;}
  .files-grid{grid-template-columns:1fr 1fr;}
}