:root {
  --bg: #0b0d11;
  --surface: #13161c;
  --surface-2: #181c23;
  --surface-3: #1f242d;
  --border: #242a33;
  --border-strong: #2f3742;
  --text: #e6e8ec;
  --text-2: #b6bcc6;
  --muted: #828b99;
  --accent: #4b73ff;
  --accent-hover: #3d63ee;
  --accent-soft: rgba(75, 115, 255, 0.12);
  --success: #3fb950;
  --danger: #e5534b;
  --radius: 10px;
  --radius-sm: 7px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.icon { width: 16px; height: 16px; }

/* ---------------- Topbar ---------------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.mark {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--accent);
  background: var(--surface-2);
}
.mark svg { width: 20px; height: 20px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.product { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.tagline { font-size: 12px; color: var(--muted); }

.topbar-right { display: flex; align-items: center; gap: 14px; }
.status { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--text-2); }
.status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.status.ok .dot { background: var(--success); box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.15); }
.status.err .dot { background: var(--danger); box-shadow: 0 0 0 3px rgba(229, 83, 75, 0.15); }
.powered {
  display: inline-flex; align-items: center; font-size: 12.5px; color: var(--text-2);
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--surface-2); white-space: nowrap;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  font-family: inherit; font-size: 13.5px; font-weight: 500;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 8px 14px; cursor: pointer; color: var(--text);
  transition: background 0.12s, border-color 0.12s, opacity 0.12s;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-secondary { background: var(--surface-2); border-color: var(--border-strong); color: var(--text-2); }
.btn-secondary:hover { background: var(--surface-3); color: var(--text); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text-2); }
.link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
.link:hover { text-decoration: underline; }

/* ---------------- Layout ---------------- */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 18px;
  padding: 18px 24px 24px;
  max-width: 1440px; width: 100%; margin: 0 auto;
  min-height: 0;
}
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; flex-direction: column;
  overflow: hidden;
  min-height: 0;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
  min-height: 53px;
}
.panel-title { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.panel-body { padding: 16px; display: flex; flex-direction: column; flex: 1; min-height: 0; }
.panel-foot { display: flex; gap: 10px; padding: 14px 16px; border-top: 1px solid var(--border); }
.panel-foot .btn-primary { flex: 1; }

/* ---------------- Tabs ---------------- */
.tabs { display: inline-flex; gap: 2px; background: var(--surface-2); padding: 3px; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.tab {
  padding: 5px 14px; border: none; border-radius: 5px;
  background: transparent; color: var(--muted);
  font: 500 12.5px var(--font); cursor: pointer; transition: 0.12s;
}
.tab.active { background: var(--surface-3); color: var(--text); }
.tab-content { display: flex; flex-direction: column; gap: 12px; flex: 1; min-height: 0; }
.hidden { display: none !important; }

/* ---------------- Dropzone ---------------- */
.dropzone {
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 28px 18px; text-align: center;
  background: var(--surface-2);
  transition: 0.15s; cursor: pointer;
}
.dropzone:hover { border-color: var(--muted); }
.dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dz-icon { width: 28px; height: 28px; color: var(--muted); margin-bottom: 10px; }
.dz-title { font-weight: 500; font-size: 14px; }
.dz-sub { color: var(--muted); font-size: 13px; margin-top: 3px; }
.hint { color: var(--muted); font-size: 12px; }

.file-list { list-style: none; display: flex; flex-direction: column; gap: 6px; overflow-y: auto; }
.file-row {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 10px 8px 12px; font-size: 13px;
}
.file-row .name { display: flex; align-items: center; gap: 8px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-2); }
.file-row .name svg { width: 15px; height: 15px; color: var(--muted); flex-shrink: 0; }
.file-row .remove { color: var(--muted); background: none; border: none; cursor: pointer; display: grid; place-items: center; padding: 2px; border-radius: 4px; }
.file-row .remove:hover { color: var(--danger); background: var(--surface-3); }
.file-row .remove svg { width: 15px; height: 15px; }

/* ---------------- Inputs ---------------- */
.field-label { font-size: 12px; color: var(--muted); font-weight: 500; }
.text-input {
  width: 100%; background: var(--surface-2); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); padding: 9px 11px; color: var(--text);
  font: 13.5px var(--font); outline: none; transition: border-color 0.12s;
}
.text-input:focus { border-color: var(--accent); }
.code-area {
  width: 100%; flex: 1; min-height: 220px; resize: none;
  background: var(--surface-2); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); padding: 12px; color: var(--text);
  font: 12.5px/1.55 var(--mono); outline: none; transition: border-color 0.12s;
}
.code-area:focus { border-color: var(--accent); }

/* ---------------- Results ---------------- */
.results-panel { min-width: 0; }
.results-head { min-height: 53px; }
.result-tabs { display: flex; gap: 6px; padding: 10px 16px; overflow-x: auto; border-bottom: 1px solid var(--border); }
.result-tabs:empty { display: none; }
.result-tab {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text-2);
  font: 500 12.5px var(--mono); cursor: pointer; white-space: nowrap; transition: 0.12s;
}
.result-tab:hover { border-color: var(--border-strong); }
.result-tab.active { background: var(--surface-3); color: var(--text); border-color: var(--border-strong); }
.result-tab .tab-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); }
.result-tab.error .tab-dot { background: var(--danger); }

.result-body { flex: 1; overflow-y: auto; padding: 26px 30px; min-height: 0; }

.empty-state, .loading { text-align: center; color: var(--muted); padding-top: 84px; }
.empty-icon { width: 42px; height: 42px; color: var(--border-strong); margin-bottom: 16px; }
.empty-state h3 { font-size: 15px; color: var(--text-2); font-weight: 600; }
.empty-state p { margin-top: 6px; font-size: 13.5px; }

.loading p { font-size: 13.5px; }
.loading p::after { content: ""; animation: dots 1.4s steps(4, end) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }
.spinner {
  width: 34px; height: 34px; margin: 0 auto 16px;
  border: 2.5px solid var(--surface-3); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- Markdown ---------------- */
.markdown { line-height: 1.7; font-size: 14px; color: var(--text-2); max-width: 800px; }
.markdown h1 { font-size: 22px; color: var(--text); margin: 2px 0 14px; font-weight: 650; letter-spacing: -0.01em; }
.markdown h2 { font-size: 17px; color: var(--text); margin: 26px 0 10px; font-weight: 600; padding-bottom: 7px; border-bottom: 1px solid var(--border); }
.markdown h3 { font-size: 14.5px; color: var(--text); margin: 20px 0 8px; font-weight: 600; }
.markdown p { margin: 10px 0; }
.markdown ul, .markdown ol { margin: 10px 0 10px 20px; }
.markdown li { margin: 5px 0; }
.markdown li::marker { color: var(--muted); }
.markdown strong { color: var(--text); font-weight: 600; }
.markdown a { color: var(--accent); }
.markdown code { font-family: var(--mono); font-size: 12.5px; background: var(--surface-2); color: #c9a36a; padding: 2px 5px; border-radius: 4px; border: 1px solid var(--border); }
.markdown pre { background: #0d1015; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; overflow-x: auto; margin: 14px 0; }
.markdown pre code { background: none; border: none; padding: 0; color: inherit; font-size: 12.5px; line-height: 1.6; }
.markdown hr { border: none; border-top: 1px solid var(--border); margin: 22px 0; }
.markdown blockquote { border-left: 2px solid var(--border-strong); padding-left: 14px; color: var(--muted); margin: 12px 0; }
.markdown table { border-collapse: collapse; margin: 14px 0; width: 100%; font-size: 13px; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.markdown th { background: var(--surface-2); color: var(--text); font-weight: 600; }

/* ---------------- Modal ---------------- */
.modal { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.55); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal-card { background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; width: min(440px, 92vw); display: flex; flex-direction: column; gap: 14px; }
.modal-card h3 { font-size: 16px; font-weight: 600; }
.modal-sub { font-size: 13px; color: var(--muted); line-height: 1.55; }
.modal-sub code { font-family: var(--mono); background: var(--surface-2); padding: 1px 5px; border-radius: 4px; font-size: 12px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 2px; }

/* ---------------- Toast ---------------- */
#toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(14px);
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  padding: 11px 16px; border-radius: var(--radius-sm); font-size: 13px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: 0.22s; z-index: 200;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.error { border-color: var(--danger); }

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  .results-panel { min-height: 460px; }
}