:root {
  --bg: #0f1412;
  --bg-2: #18201c;
  --panel: #1c2621;
  --ink: #e8f0ea;
  --muted: #9aaf9f;
  --accent: #c4a35a;
  --accent-ink: #1a1408;
  --danger: #e07a6a;
  --line: rgba(232, 240, 234, 0.12);
  --radius: 14px;
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(196, 163, 90, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(70, 120, 95, 0.22), transparent 50%),
    linear-gradient(165deg, var(--bg), #121a16 45%, #0c100e);
}

.brand {
  margin: 0;
  font-family: var(--font);
  font-size: 1.55rem;
  letter-spacing: 0.02em;
  color: var(--accent);
}
.muted { color: var(--muted); margin: 0.2rem 0 0; font-size: 0.9rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.hidden { display: none !important; }

body.auth {
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.auth-card {
  width: min(420px, 100%);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.6rem;
  backdrop-filter: blur(8px);
}
.auth-card h1 {
  font-family: var(--font);
  font-weight: 500;
  font-size: 1.7rem;
  margin: 0.4rem 0 0.2rem;
}
.stack { display: grid; gap: 0.9rem; margin-top: 1.2rem; }
label { display: grid; gap: 0.35rem; font-size: 0.92rem; color: var(--muted); }
input, textarea, select, button {
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-2);
  color: var(--ink);
  padding: 0.75rem 0.85rem;
}
button {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  font-weight: 650;
  cursor: pointer;
}
button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}
button:disabled { opacity: 0.55; cursor: wait; }
.error {
  background: rgba(224, 122, 106, 0.15);
  color: #ffc7be;
  border: 1px solid rgba(224, 122, 106, 0.35);
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(15, 20, 18, 0.7);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.usage-box {
  margin-left: auto;
  text-align: right;
  line-height: 1.2;
}
.usage-label {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.usage-box strong {
  font-size: 1.05rem;
  color: var(--accent);
}
.usage-sub {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.15rem;
}
@media (max-width: 560px) {
  .usage-box { margin-left: 0; }
  .top { flex-wrap: wrap; }
}

.layout {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  max-width: 1100px;
  margin: 0 auto;
}
@media (min-width: 860px) {
  .layout { grid-template-columns: 250px minmax(0, 1fr) 280px; align-items: start; }
  .panel.agent { grid-column: 2; }
}
.agent-result {
  margin: 0.8rem 0 0;
  padding: 0.75rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  white-space: pre-wrap;
  font-size: 0.82rem;
  max-height: 240px;
  overflow: auto;
}

.panel {
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}
.panel h2 {
  margin: 0;
  font-family: var(--font);
  font-weight: 500;
  font-size: 1.25rem;
}

.file-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.35rem;
}
.file-list button {
  width: 100%;
  text-align: left;
  background: var(--bg-2);
  color: var(--ink);
  font-weight: 500;
}
.file-list button.active {
  outline: 1px solid var(--accent);
  color: var(--accent);
}

.messages {
  min-height: 42vh;
  max-height: 58vh;
  overflow: auto;
  display: grid;
  gap: 0.7rem;
  padding: 0.2rem 0 0.8rem;
}
.bubble {
  padding: 0.8rem 0.9rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  white-space: pre-wrap;
  line-height: 1.45;
}
.bubble.user { background: rgba(196, 163, 90, 0.12); }
.bubble.assistant { background: var(--bg-2); }
.bubble .meta { color: var(--muted); font-size: 0.8rem; margin-bottom: 0.35rem; }

.ask { display: grid; gap: 0.65rem; }
.ask-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 0.55rem; }
@media (max-width: 560px) {
  .ask-row { grid-template-columns: 1fr; }
}

.section-title { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.section-title .ghost { padding: 0.45rem 0.6rem; font-size: 0.82rem; }
.approval-list {
  list-style: none; padding: 0; margin: 0.8rem 0 0; display: grid; gap: 0.55rem;
}
.approval {
  padding: 0.7rem; border: 1px solid var(--line); border-left-width: 3px;
  border-radius: 10px; display: grid; gap: 0.6rem; font-size: 0.88rem;
}
.approval.orange { border-left-color: var(--accent); }
.approval.red { border-left-color: var(--danger); }
.approval-actions { display: flex; gap: 0.5rem; }
.approval-actions button { padding: 0.45rem 0.6rem; font-size: 0.82rem; }