:root {
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --ink: #1a2332;
  --ink-soft: #4a5568;
  --muted: #718096;
  --line: #dde3ea;
  --accent: #1e4d6b;
  --accent-hover: #163a52;
  --accent-soft: #e8f0f5;
  --success: #047857;
  --success-bg: #ecfdf5;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --shadow: 0 4px 24px rgba(26, 35, 50, 0.06);
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Consolas", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

/* ── Header ── */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-mark.lg {
  width: 3rem;
  height: 3rem;
  font-size: 1.75rem;
  border-radius: 12px;
}

.brand strong { font-size: 1.05rem; display: block; }
.tag {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.45rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
  vertical-align: middle;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.matter-picker {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.matter-picker select {
  min-width: 220px;
  font-size: 0.9rem;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

/* ── Stats bar ── */
.stats-bar {
  display: flex;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}

.stat {
  display: flex;
  flex-direction: column;
  min-width: 5rem;
}

.stat-num {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Workspace layout ── */
.workspace {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(340px, 1.6fr) minmax(260px, 1fr);
  gap: 1rem;
  padding: 1rem 1.5rem 2rem;
  max-width: 1600px;
  margin: 0 auto;
}

.column { display: flex; flex-direction: column; gap: 1rem; min-width: 0; }
.column-main { gap: 1rem; }

@media (max-width: 1100px) {
  .workspace { grid-template-columns: 1fr 1fr; }
  .column-main { grid-column: 1 / -1; order: -1; }
}

@media (max-width: 700px) {
  .workspace { grid-template-columns: 1fr; padding: 0.75rem; }
  .header-actions { width: 100%; }
  .matter-picker select { min-width: 100%; }
}

/* ── Panels ── */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
}

.panel-chat { flex: 1; }

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.panel-head h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.panel-desc {
  margin: 0.25rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 1rem 0;
}

/* ── Forms ── */
.stack { display: flex; flex-direction: column; gap: 0.65rem; }
.stack.compact { margin-bottom: 0.75rem; }

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

input, textarea, select {
  font: inherit;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea { resize: vertical; min-height: 4rem; }

/* ── Buttons ── */
.btn {
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.primary { background: var(--accent); color: white; }
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn.secondary { background: var(--accent-soft); color: var(--accent); }
.btn.secondary:hover:not(:disabled) { background: #d4e4ed; }

.btn.ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.btn.ghost:hover:not(:disabled) { background: var(--surface-2); }

.btn.small { padding: 0.35rem 0.65rem; font-size: 0.8rem; }
.btn.full { width: 100%; }

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  padding: 0;
  text-decoration: underline;
}

/* ── Chips / suggestions ── */
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.chip {
  font: inherit;
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.chip:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Chat output ── */
.chat-output {
  margin-top: 1rem;
  padding: 1rem;
  background: #1a2332;
  color: #e8ecf0;
  border-radius: var(--radius);
  min-height: 180px;
  max-height: 420px;
  overflow: auto;
  font-size: 0.9rem;
  line-height: 1.6;
}

.chat-output .placeholder { color: #8b9cb3; margin: 0; }
.chat-output .answer-text { white-space: pre-wrap; margin: 0 0 1rem; }

.citations-block {
  border-top: 1px solid #2d3a4d;
  padding-top: 0.75rem;
  margin-top: 0.75rem;
}

.citations-block h4 {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8b9cb3;
}

.citation-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid #2d3a4d;
  font-size: 0.85rem;
}

.citation-item:last-child { border-bottom: none; }

/* ── Matter detail ── */
.matter-detail { font-size: 0.9rem; }
.matter-detail .placeholder { color: var(--muted); margin: 0; }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.detail-stat {
  text-align: center;
  padding: 0.5rem;
  background: var(--surface-2);
  border-radius: 8px;
}

.detail-stat strong {
  display: block;
  font-size: 1.25rem;
  color: var(--accent);
}

.detail-stat span { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; }

.detail-title { font-weight: 700; margin: 0 0 0.25rem; }
.detail-meta { color: var(--muted); font-size: 0.82rem; margin: 0 0 0.75rem; }

/* ── Lists ── */
.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
}

.card-list.tall { max-height: 320px; }

.card-list li {
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-2);
  font-size: 0.88rem;
}

.card-list li.empty-item {
  color: var(--muted);
  font-style: italic;
  background: transparent;
  border-style: dashed;
}

.card-list li.active-matter {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.card-title { font-weight: 600; margin-bottom: 0.15rem; }
.card-meta { font-size: 0.78rem; color: var(--muted); font-family: var(--mono); word-break: break-all; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.indexed, .badge.succeeded { background: var(--success-bg); color: var(--success); }
.badge.stored, .badge.pending, .badge.running { background: var(--warn-bg); color: var(--warn); }
.badge.failed, .badge.dead_letter, .badge.error { background: var(--danger-bg); color: var(--danger); }

/* ── Status / errors ── */
.status-msg {
  font-size: 0.85rem;
  color: var(--success);
  min-height: 1.2em;
  margin: 0.5rem 0 0;
}

.status-msg.error { color: var(--danger); }

.error { color: var(--danger); font-size: 0.88rem; min-height: 1.2em; }
.muted { color: var(--muted); }

/* ── Login ── */
.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(circle at 20% 20%, #d4e4ed 0, transparent 45%),
    radial-gradient(circle at 80% 80%, #e8f0f5 0, transparent 40%),
    var(--bg);
}

.login-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 820px;
  width: 100%;
  align-items: center;
}

@media (max-width: 700px) {
  .login-wrap { grid-template-columns: 1fr; }
  .login-brand { text-align: center; }
}

.login-brand h1 {
  margin: 0.75rem 0 0.25rem;
  font-size: 1.75rem;
  color: var(--ink);
}

.login-sub {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.login-features {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.login-features li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.login-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.login-card h2 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}

.login-card .muted { margin: 0 0 1.25rem; font-size: 0.88rem; }