* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, sans-serif; background: #0f172a; color: #e2e8f0; min-height: 100vh; font-size: 14px; }
.app { display: grid; grid-template-rows: auto auto 1fr; height: 100vh; }

/* ===== Header ===== */
header { padding: 12px 20px; background: #1e293b; border-bottom: 1px solid #334155; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
header h1 { font-size: 18px; color: #f1f5f9; white-space: nowrap; }
header .grow { flex: 1; }
.header-group { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid #334155; border-radius: 8px; background: #0f172a; }
.header-group label { font-size: 11px; color: #94a3b8; text-transform: uppercase; letter-spacing: .5px; }

/* ===== Buttons ===== */
.btn-primary { background: #3b82f6; color: #fff; border: none; padding: 8px 16px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-primary:hover { background: #2563eb; }
.btn-secondary { background: #334155; color: #e2e8f0; border: none; padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-secondary:hover { background: #475569; }
.btn-sm { background: #334155; color: #e2e8f0; border: none; padding: 4px 10px; border-radius: 4px; cursor: pointer; font-size: 12px; }
.btn-sm:hover { background: #475569; }
.btn-sm:disabled { opacity: .4; cursor: not-allowed; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-icon { background: none; border: none; color: #94a3b8; cursor: pointer; font-size: 16px; padding: 4px; }
.btn-icon:hover { color: #e2e8f0; }

/* ===== Search bar ===== */
.search-bar { padding: 10px 20px; background: #1e293b; border-bottom: 1px solid #334155; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-bar input[type="text"] { flex: 1; min-width: 200px; padding: 8px 14px; background: #0f172a; color: #e2e8f0; border: 1px solid #334155; border-radius: 6px; font-size: 14px; }
.search-bar input[type="text"]::placeholder { color: #64748b; }
.search-opts { display: flex; gap: 6px; flex-wrap: wrap; }
.search-opts label { font-size: 12px; color: #94a3b8; cursor: pointer; padding: 4px 8px; border: 1px solid #334155; border-radius: 4px; user-select: none; }
.search-opts label:has(input:checked) { background: #1e40af; color: #e2e8f0; border-color: #3b82f6; }
.search-opts input { display: none; }

/* ===== Main layout ===== */
.main { display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; }

/* ===== Results panel ===== */
.results-panel { overflow-y: auto; border-right: 1px solid #334155; }
.results-header { padding: 12px 20px; background: #1e293b; border-bottom: 1px solid #334155; }
.results-header h3 { font-size: 14px; color: #f1f5f9; }
.results-header .meta { font-size: 12px; color: #94a3b8; margin-top: 4px; }
.term-chips { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 6px; }
.term-chip { background: #fef08a; color: #713f12; padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.folder-chip { background: #3b82f620; color: #93c5fd; padding: 2px 8px; border-radius: 4px; font-size: 12px; border: 1px solid #3b82f6; }

.result-file { padding: 8px 20px; border-bottom: 1px solid #1e293b; }
.result-file-name { font-weight: 600; color: #f1f5f9; font-size: 13px; padding: 4px 0; }
.result-page { display: flex; align-items: flex-start; gap: 8px; padding: 6px 0 6px 12px; cursor: pointer; border-radius: 4px; }
.result-page:hover { background: #1e293b; }
.result-page-num { font-size: 12px; color: #64748b; min-width: 40px; white-space: nowrap; }
.result-page-snippet { font-size: 12px; color: #cbd5e1; font-family: "SF Mono", "Cascadia Code", monospace; line-height: 1.5; }
.result-page-snippet mark { background: #fef08a; color: #713f12; padding: 0 2px; border-radius: 2px; }
.result-page-count { font-size: 11px; color: #64748b; margin-left: auto; white-space: nowrap; }

.results-empty { padding: 40px 20px; text-align: center; color: #64748b; }

/* ===== Viewer panel ===== */
.viewer-panel { display: flex; flex-direction: column; overflow: hidden; }
.viewer-toolbar { padding: 8px 16px; background: #1e293b; border-bottom: 1px solid #334155; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 10; }
.viewer-title { font-size: 13px; color: #94a3b8; }
.viewer-controls { display: flex; gap: 4px; }
.viewer-canvas-wrap { flex: 1; overflow: auto; display: flex; justify-content: center; padding: 16px; background: #0f172a; }
.viewer-canvas { max-width: 100%; box-shadow: 0 4px 24px rgba(0,0,0,.4); }
.viewer-loading { padding: 40px; text-align: center; color: #64748b; }
.viewer-empty { padding: 40px; text-align: center; color: #64748b; font-size: 14px; line-height: 1.6; }

/* ===== Modals ===== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal { background: #1e293b; border: 1px solid #334155; border-radius: 12px; padding: 24px; min-width: 340px; max-width: 480px; max-height: 90vh; overflow-y: auto; }
.modal h2 { font-size: 16px; color: #f1f5f9; margin-bottom: 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* ===== Forms ===== */
.form-stack { display: flex; flex-direction: column; gap: 10px; }
.form-stack input, .form-stack select { padding: 8px 12px; background: #0f172a; color: #e2e8f0; border: 1px solid #334155; border-radius: 6px; font-size: 14px; }
.form-stack input::placeholder { color: #64748b; }
.form-error { color: #f87171; font-size: 13px; min-height: 18px; }
.form-label { font-size: 12px; color: #94a3b8; text-transform: uppercase; letter-spacing: .5px; }

/* ===== Upload ===== */
.upload-list { margin-top: 10px; }
.upload-rows { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.upload-row { display: flex; align-items: center; gap: 8px; padding: 6px 0; }
.upload-name { font-size: 12px; color: #e2e8f0; min-width: 120px; max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-bar { flex: 1; height: 6px; background: #334155; border-radius: 3px; overflow: hidden; }
.upload-bar-fill { height: 100%; background: #3b82f6; width: 0; transition: width .3s; border-radius: 3px; }
.upload-bar-fill.ok { background: #22c55e; }
.upload-bar-fill.err { background: #ef4444; }
.upload-status { font-size: 11px; color: #94a3b8; min-width: 80px; text-align: right; }

/* ===== Toast ===== */
.toast { position: fixed; bottom: 20px; right: 20px; padding: 10px 18px; border-radius: 8px; font-size: 13px; color: #fff; z-index: 2000; animation: toastIn .3s ease, toastOut .3s ease 3s forwards; }
.toast-success { background: #16a34a; }
.toast-error { background: #dc2626; }
.toast-info { background: #3b82f6; }
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; } }

/* ===== User chip ===== */
#user-chip { display: flex; align-items: center; gap: 6px; }
.user-chip-name { font-size: 13px; color: #e2e8f0; white-space: nowrap; }

/* ===== Stats ===== */
#stats { font-size: 12px; color: #64748b; }

/* ===== Folder grouping ===== */
.result-folder { padding: 6px 20px; background: #1a2436; border-bottom: 1px solid #334155; }
.result-folder-name { font-weight: 700; color: #93c5fd; font-size: 13px; }

/* ===== Scope filter ===== */
.scope-group { display: inline-flex; align-items: center; gap: 4px; margin-left: 4px; }
.scope-group select { padding: 3px 6px; background: #0f172a; color: #e2e8f0; border: 1px solid #334155; border-radius: 4px; font-size: 12px; }