/* REA Studio — design system. Light-first workspace, dark via [data-theme="dark"]. */
:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f1f1ee;
  --surface-3: #e9e9e5;
  --border: #e4e4df;
  --border-strong: #d1d1ca;
  --text: #1b1b19;
  --text-2: #5c5c56;
  --text-3: #8b8b83;
  --accent: #5b5bd6;
  --accent-hover: #4a4ac2;
  --accent-soft: #eeeefc;
  --accent-text: #ffffff;
  --ok: #1f9d55;
  --ok-soft: #e4f6ec;
  --warn: #b7791f;
  --warn-soft: #fdf3dc;
  --err: #d23f3f;
  --err-soft: #fdeaea;
  --info: #2b6cb0;
  --info-soft: #e6f0fb;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(20, 20, 15, .06);
  --shadow: 0 6px 24px rgba(20, 20, 15, .10);
  --sidebar-w: 248px;
  --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
[data-theme="dark"] {
  --bg: #121214;
  --surface: #1a1a1d;
  --surface-2: #232327;
  --surface-3: #2c2c31;
  --border: #2b2b30;
  --border-strong: #3a3a41;
  --text: #ececea;
  --text-2: #a3a3a0;
  --text-3: #75756f;
  --accent: #8b8bf0;
  --accent-hover: #a2a2f6;
  --accent-soft: #25254a;
  --accent-text: #11111f;
  --ok: #48c779;
  --ok-soft: #14301f;
  --warn: #e0b04a;
  --warn-soft: #33290f;
  --err: #f07070;
  --err-soft: #3a1a1a;
  --info: #6cb0f0;
  --info-soft: #14283d;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 10px 32px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.5 var(--font); -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0; letter-spacing: -.01em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); }
.mono { font-family: var(--mono); }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); }
.hidden { display: none !important; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Shell ---------- */
#app { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
  background: var(--surface); border-right: 1px solid var(--border); padding: 14px 12px; gap: 14px; overflow-y: auto;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: var(--accent-text);
  display: grid; place-items: center;
}
.brand-mark svg { width: 16px; height: 16px; }
.brand-name { font-weight: 650; letter-spacing: -.02em; }
.brand-sub { font-size: 11px; color: var(--text-3); margin-top: -2px; }
.search-btn {
  display: flex; align-items: center; gap: 8px; width: 100%; padding: 7px 10px; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-3);
}
.search-btn:hover { border-color: var(--border-strong); }
.search-btn kbd { margin-left: auto; font: 11px var(--mono); padding: 1px 5px; border-radius: 4px; background: var(--surface); border: 1px solid var(--border); }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); padding: 8px 10px 4px; display: flex; justify-content: space-between; align-items: center; }
.nav a, .nav .nav-item {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: var(--radius-sm);
  color: var(--text-2); font-weight: 500; text-decoration: none; cursor: pointer; min-width: 0;
}
.nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); }
.nav a svg { flex: none; }
.nav .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-strong); flex: none; }
.nav .dot.ok { background: var(--ok); }
.nav .dot.run { background: var(--info); animation: pulse 1.4s infinite; }
.sidebar-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 6px 0; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-3); }
.health { display: inline-flex; align-items: center; gap: 6px; }
.health i { width: 8px; height: 8px; border-radius: 50%; background: var(--text-3); }
.health.up i { background: var(--ok); }
.health.down i { background: var(--err); }

.main { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 12px; padding: 10px 28px;
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border);
  min-height: 52px;
}
.crumbs { display: flex; align-items: center; gap: 8px; font-weight: 550; min-width: 0; }
.crumbs .sep { color: var(--text-3); }
.crumbs a { color: var(--text-2); }
.top-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.topbar .menu-btn { display: none; }
#view { padding: 28px; max-width: 1280px; width: 100%; margin: 0 auto; flex: 1; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.page-head h1 { font-size: 24px; font-weight: 650; }
.page-head p { margin: 4px 0 0; color: var(--text-2); }

/* ---------- Primitives ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 7px 13px; cursor: pointer;
  border-radius: var(--radius-sm); border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  font-weight: 550; white-space: nowrap; transition: background .12s, border-color .12s, transform .05s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.danger { color: var(--err); }
.btn.danger:hover { background: var(--err-soft); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.sm { padding: 4px 9px; font-size: 12.5px; }
.btn.icon { padding: 7px; }
.btn svg, .icon-svg { width: 16px; height: 16px; flex: none; }
.btn.sm svg { width: 14px; height: 14px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.card-pad { padding: 18px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.card-head h3 { font-size: 14px; font-weight: 620; }
.card-body { padding: 18px; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(320px, 1fr); gap: 16px; align-items: start; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.spacer { flex: 1; }

.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 550;
  background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); white-space: nowrap;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.err { background: var(--err-soft); color: var(--err); border-color: transparent; }
.badge.info { background: var(--info-soft); color: var(--info); border-color: transparent; }
.badge.accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.pulse { animation: pulse 1.4s infinite; }

.field { display: flex; flex-direction: column; gap: 5px; }
.field > label, .label { font-size: 12px; font-weight: 600; color: var(--text-2); }
.input, .select, .textarea {
  width: 100%; padding: 8px 10px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong);
  background: var(--surface); outline: none; transition: border-color .12s, box-shadow .12s;
}
.textarea { resize: vertical; min-height: 84px; line-height: 1.5; }
.input:focus, .select:focus, .textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.hint { font-size: 12px; color: var(--text-3); }

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 18px; overflow-x: auto; }
.tab {
  padding: 9px 14px; font-weight: 550; color: var(--text-2); border-bottom: 2px solid transparent; margin-bottom: -1px;
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; text-decoration: none;
}
.tab:hover { color: var(--text); text-decoration: none; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.seg { display: inline-flex; padding: 2px; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); }
.seg button { padding: 4px 11px; border: 0; background: transparent; border-radius: 5px; cursor: pointer; font-weight: 550; color: var(--text-2); }
.seg button.on { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }

.empty { text-align: center; padding: 48px 20px; color: var(--text-2); }
.empty h3 { color: var(--text); margin-bottom: 6px; }
.empty > svg { width: 34px; height: 34px; color: var(--text-3); margin-bottom: 10px; }

.stat { padding: 16px 18px; }
.stat .n { font-size: 28px; font-weight: 650; letter-spacing: -.02em; }
.stat .l { color: var(--text-2); font-size: 12.5px; }

.list { display: flex; flex-direction: column; }
.list-item { display: flex; align-items: center; gap: 12px; padding: 12px 18px; border-bottom: 1px solid var(--border); }
.list-item:last-child { border-bottom: 0; }
.list-item.click { cursor: pointer; }
.list-item.click:hover { background: var(--surface-2); }
.list-item .grow { flex: 1; min-width: 0; }
.list-item .title { font-weight: 570; }
.list-item .sub { color: var(--text-2); font-size: 12.5px; }

table.tbl { width: 100%; border-collapse: collapse; }
.tbl th { text-align: left; font-size: 12px; font-weight: 600; color: var(--text-2); padding: 9px 14px; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.tbl td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover { background: var(--surface-2); }

.code, pre.code {
  font: 12px/1.55 var(--mono); background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px; overflow: auto; max-height: 280px; white-space: pre-wrap; word-break: break-word; margin: 0;
}

/* ---------- Project cards ---------- */
.pcard { padding: 16px; cursor: pointer; display: flex; flex-direction: column; gap: 12px; transition: border-color .12s, box-shadow .12s, transform .12s; }
.pcard:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.pcard .title { font-weight: 620; font-size: 15px; line-height: 1.35; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; color: var(--text-3); }
.chip.on { color: var(--ok); }
.chip svg { width: 14px; height: 14px; }
.progress { height: 6px; background: var(--surface-3); border-radius: 99px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--accent); border-radius: 99px; transition: width .4s; }

/* ---------- Pipeline ---------- */
.pipeline { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
.stage {
  position: relative; padding: 12px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface);
  display: flex; flex-direction: column; gap: 6px; cursor: pointer; transition: border-color .12s, box-shadow .12s;
}
.stage:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.stage .num { font: 11px var(--mono); color: var(--text-3); }
.stage .name { font-weight: 600; font-size: 13px; }
.stage .st { font-size: 11.5px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; color: var(--text-3); }
.stage .st i { width: 8px; height: 8px; border-radius: 50%; background: var(--border-strong); }
.stage.pass { border-color: color-mix(in srgb, var(--ok) 45%, var(--border)); background: color-mix(in srgb, var(--ok-soft) 55%, var(--surface)); }
.stage.pass .st { color: var(--ok); } .stage.pass .st i { background: var(--ok); }
.stage.running { border-color: var(--info); }
.stage.running .st { color: var(--info); } .stage.running .st i { background: var(--info); animation: pulse 1.2s infinite; }
.stage.fail { border-color: var(--err); } .stage.fail .st { color: var(--err); } .stage.fail .st i { background: var(--err); }

.live-banner { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-radius: var(--radius); background: var(--info-soft); color: var(--info); border: 1px solid color-mix(in srgb, var(--info) 30%, transparent); margin-bottom: 16px; font-weight: 550; }
.live-banner i { width: 9px; height: 9px; border-radius: 50%; background: var(--info); animation: pulse 1.2s infinite; }

.video-wrap { background: #0c0c0e; border-radius: var(--radius); overflow: hidden; aspect-ratio: 16 / 9; display: grid; place-items: center; position: relative; }
.video-wrap video { width: 100%; height: 100%; background: #000; display: block; }
.video-empty { color: #8b8b93; text-align: center; padding: 20px; }
.video-empty svg { width: 36px; height: 36px; margin-bottom: 8px; }

.log { font: 12px/1.6 var(--mono); max-height: 200px; overflow: auto; background: var(--surface-2); border-radius: var(--radius-sm); padding: 10px 12px; border: 1px solid var(--border); }
.log .t { color: var(--text-3); }

/* ---------- Documents ---------- */
.docs { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 16px; align-items: start; }
.filelist { max-height: 70vh; overflow-y: auto; }
.filelist .grp { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); padding: 12px 14px 4px; }
.filelist button { display: flex; align-items: center; gap: 8px; width: 100%; text-align: left; padding: 7px 14px; border: 0; background: transparent; cursor: pointer; color: var(--text-2); }
.filelist button:hover { background: var(--surface-2); }
.filelist button.on { background: var(--accent-soft); color: var(--accent); font-weight: 550; }
.editor-area { width: 100%; min-height: 60vh; border: 0; outline: none; resize: vertical; padding: 18px; font: 13px/1.65 var(--mono); background: var(--surface); }
.prose { padding: 20px 26px; line-height: 1.7; max-width: 78ch; }
.prose h1 { font-size: 24px; margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.prose h2 { font-size: 19px; margin: 24px 0 8px; }
.prose h3 { font-size: 16px; margin: 18px 0 6px; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table, .prose pre { margin: 0 0 12px; }
.prose code { font: 12.5px var(--mono); background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--surface-2); padding: 12px; border-radius: var(--radius-sm); overflow: auto; }
.prose pre code { background: none; padding: 0; }
.prose blockquote { border-left: 3px solid var(--accent); padding: 2px 14px; color: var(--text-2); background: var(--accent-soft); border-radius: 0 6px 6px 0; }
.prose table { border-collapse: collapse; width: 100%; }
.prose th, .prose td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.prose th { background: var(--surface-2); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }

/* ---------- Voice ---------- */
.track { display: flex; align-items: center; gap: 12px; padding: 11px 16px; border-bottom: 1px solid var(--border); cursor: pointer; }
.track:last-child { border-bottom: 0; }
.track:hover { background: var(--surface-2); }
.track.on { background: var(--accent-soft); }
.player { padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.player audio { width: 100%; }

/* ---------- Agents ---------- */
.agents-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, 1.2fr); gap: 16px; align-items: start; }
.agent-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.agent { padding: 12px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); cursor: pointer; display: flex; flex-direction: column; gap: 4px; }
.agent:hover { border-color: var(--border-strong); }
.agent.on { border-color: var(--accent); background: var(--accent-soft); }

/* ---------- Overlays ---------- */
dialog { border: 1px solid var(--border); border-radius: 14px; padding: 0; background: var(--surface); color: var(--text); box-shadow: var(--shadow); max-width: min(640px, 94vw); width: 100%; }
dialog::backdrop { background: rgba(10, 10, 12, .45); backdrop-filter: blur(2px); }
.dlg-head { padding: 18px 22px 0; display: flex; justify-content: space-between; align-items: center; }
.dlg-head h2 { font-size: 17px; }
.dlg-body { padding: 16px 22px; max-height: 70vh; overflow-y: auto; }
.dlg-foot { padding: 14px 22px 18px; display: flex; justify-content: flex-end; gap: 8px; }
#palette { max-width: 560px; top: 14vh; margin-top: 0; }
.pal-input { width: 100%; border: 0; border-bottom: 1px solid var(--border); padding: 16px 20px; outline: none; background: transparent; font-size: 15px; }
.pal-list { max-height: 50vh; overflow-y: auto; padding: 6px; }
.pal-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: var(--radius-sm); cursor: pointer; }
.pal-item.on { background: var(--accent-soft); color: var(--accent); }
.pal-item .grp { margin-left: auto; font-size: 11.5px; color: var(--text-3); }

#toasts { position: fixed; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast { display: flex; align-items: center; gap: 10px; min-width: 240px; max-width: 380px; padding: 11px 14px; border-radius: var(--radius); background: var(--text); color: var(--bg); box-shadow: var(--shadow); animation: slide-in .2s ease-out; }
.toast i { width: 8px; height: 8px; border-radius: 50%; background: var(--info); flex: none; }
.toast.success i { background: var(--ok); } .toast.error i { background: var(--err); } .toast.warn i { background: var(--warn); }

.skeleton { background: linear-gradient(90deg, var(--surface-2), var(--surface-3), var(--surface-2)); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: var(--radius-sm); min-height: 16px; }
.spinner { width: 15px; height: 15px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; }

@keyframes pulse { 50% { opacity: .35; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { to { background-position: -200% 0; } }
@keyframes slide-in { from { transform: translateY(8px); opacity: 0; } }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .split, .agents-layout { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 800px) {
  #app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 60; width: 280px; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  body.nav-open .sidebar { transform: none; }
  body.nav-open::after { content: ""; position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 50; }
  .topbar .menu-btn { display: inline-flex; }
  .topbar { padding: 10px 14px; }
  #view { padding: 16px 14px 80px; }
  .g2, .g3, .form-grid, .docs { grid-template-columns: 1fr; }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .agent-grid { grid-template-columns: 1fr; }
  .page-head h1 { font-size: 20px; }
  #toasts { left: 14px; right: 14px; bottom: 14px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }