:root {
  color-scheme: dark;
  --bg: #101114;
  --panel: #181a1f;
  --panel-2: #202329;
  --border: #30343c;
  --text: #f3f4f6;
  --muted: #9299a6;
  --accent: #9b8cff;
  --accent-strong: #7867ef;
  --green: #54d29a;
  --red: #ff7b88;
  --radius: 14px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 15% 0%, #1d1a32 0, transparent 38%), var(--bg); color: var(--text); }
button, input, select { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 2rem; max-width: 1500px; margin: 0 auto; padding: 28px 32px 20px; }
.topbar h1 { margin: 3px 0 0; font-size: clamp(24px, 4vw, 38px); letter-spacing: -0.04em; }
.eyebrow { margin: 0; color: var(--muted); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.status { border: 1px solid var(--border); border-radius: 999px; padding: 8px 13px; font-size: 13px; }
.status::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: currentColor; }
.status-online { color: var(--green); }
.status-offline { color: var(--muted); }

main { max-width: 1500px; margin: 0 auto; padding: 0 32px 40px; }
.card { background: color-mix(in srgb, var(--panel) 94%, transparent); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 18px 55px rgb(0 0 0 / 18%); }
.login { max-width: 760px; margin: 10vh auto 0; padding: 28px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 36px; align-items: end; }
.login h2 { margin: 0 0 8px; }
.login p { color: var(--muted); line-height: 1.55; margin: 0; }
label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 13px; }
.row { display: flex; gap: 10px; }
input, select { width: 100%; color: var(--text); background: #111318; border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; outline: none; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgb(155 140 255 / 15%); }
button { border: 0; border-radius: 10px; padding: 11px 17px; color: white; background: var(--accent-strong); transition: .15s ease; }
button:hover { filter: brightness(1.1); transform: translateY(-1px); }
button:disabled { opacity: .5; cursor: wait; }
.secondary { background: var(--panel-2); border: 1px solid var(--border); }
.ghost { background: transparent; color: var(--muted); }
.error { color: var(--red) !important; min-height: 20px; margin-top: 8px !important; }
.plugin-link { display: inline-block; margin-top: 6px; color: var(--accent); font-size: 13px; text-decoration: none; }
.plugin-link:hover { text-decoration: underline; }

.toolbar { display: grid; grid-template-columns: minmax(280px, 1fr) 210px auto auto; gap: 10px; padding: 12px; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 12px 0; }
.stats .card { padding: 15px 18px; display: flex; align-items: baseline; justify-content: space-between; }
.stats span { color: var(--muted); font-size: 13px; }
.stats strong { font-size: 24px; }
.assistant { margin-bottom: 12px; padding: 16px 18px; display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 10px 18px; align-items: center; }
.assistant h2 { margin: 4px 0 0; font-size: 18px; }
.assistant-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.assistant-status { grid-column: 2; margin: 0; color: var(--muted); font-size: 12px; }
.assistant-answer { grid-column: 1 / -1; border-top: 1px solid var(--border); padding-top: 14px; line-height: 1.6; white-space: pre-wrap; }
.assistant-answer p { margin: 0; }
.assistant-answer small { display: block; margin-top: 10px; color: var(--muted); }
.layout { display: grid; grid-template-columns: minmax(320px, 430px) minmax(0, 1fr); gap: 12px; min-height: calc(100vh - 255px); }
.documents-panel { overflow: hidden; display: flex; flex-direction: column; }
.panel-heading { display: flex; justify-content: space-between; align-items: center; padding: 17px 18px 12px; }
.panel-heading h2 { margin: 0; font-size: 16px; }
.panel-heading span { color: var(--muted); font-variant-numeric: tabular-nums; }
.documents { padding: 0 8px 10px; overflow: auto; }
.document-row { width: 100%; display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 10px; background: transparent; text-align: left; border: 1px solid transparent; }
.document-row:hover { background: var(--panel-2); border-color: var(--border); transform: none; }
.file-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; color: #c8c1ff; background: #292443; font-size: 11px; font-weight: 800; }
.file-xlsx, .file-xls { color: #8ef0bc; background: #183a2a; }
.file-docx, .file-doc { color: #9fc6ff; background: #1b3151; }
.file-pptx, .file-ppt { color: #ffb092; background: #48261c; }
.file-pdf { color: #ff9ea8; background: #461f28; font-size: 9px; }
.document-copy { min-width: 0; }
.document-copy strong, .document-copy small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.document-copy strong { font-size: 14px; }
.document-copy small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.source-badge { color: var(--muted); font-size: 10px; border: 1px solid var(--border); padding: 4px 6px; border-radius: 6px; }
.empty-list { color: var(--muted); padding: 28px 12px; text-align: center; }

.viewer { overflow: auto; padding: 24px clamp(22px, 5vw, 64px); }
.viewer-header { border-bottom: 1px solid var(--border); padding-bottom: 18px; margin-bottom: 24px; }
.viewer-header h2 { margin: 5px 0 0; font-size: 30px; }
.markdown-body { max-width: 920px; line-height: 1.7; color: #d9dce3; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { color: var(--text); line-height: 1.25; margin-top: 1.7em; }
.markdown-body code { background: var(--panel-2); padding: 2px 5px; border-radius: 5px; }
.markdown-body pre { overflow: auto; background: #0d0f13; border: 1px solid var(--border); padding: 16px; border-radius: 10px; }
.markdown-body table { border-collapse: collapse; width: 100%; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.empty-state { min-height: 55vh; display: grid; place-content: center; text-align: center; color: var(--muted); }
.empty-state h2 { color: var(--text); margin: 14px 0 6px; }
.empty-state p { max-width: 440px; line-height: 1.55; }
.empty-icon { font-size: 48px; color: var(--accent); }

@media (max-width: 900px) {
  .topbar, main { padding-left: 16px; padding-right: 16px; }
  .toolbar { grid-template-columns: 1fr 1fr; }
  .layout { grid-template-columns: 1fr; }
  .documents-panel { max-height: 45vh; }
  .login { grid-template-columns: 1fr; }
  .assistant { grid-template-columns: 1fr; }
  .assistant-status { grid-column: 1; }
}

@media (max-width: 560px) {
  .topbar { align-items: flex-start; }
  .toolbar, .stats { grid-template-columns: 1fr; }
  .stats .card { padding: 12px 15px; }
  .row { flex-direction: column; }
  .assistant-form { grid-template-columns: 1fr; }
}