:root {
  --bg: #1c1917;
  --surface: #252220;
  --surface-2: #322d29;
  --border: #423b35;
  --ink: #ede7df;
  --ink-muted: #a89e92;
  --ink-faint: #766c62;
  --brass: #c69a4e;
  --brass-soft: rgba(198, 154, 78, 0.14);
  --sage: #86a97e;
  --sage-soft: rgba(134, 169, 126, 0.14);
  --rust: #c47a4e;
  --rust-soft: rgba(196, 122, 78, 0.14);
  --error: #c15a4c;
  --error-soft: rgba(193, 90, 76, 0.14);
  --radius: 10px;
  --font-display: "Fraunces", ui-serif, Georgia, serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
}

::selection { background: var(--brass-soft); color: var(--ink); }

button, textarea, input {
  font-family: inherit;
  color: inherit;
}

/* ---------- Topbar ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface), var(--bg));
  flex-shrink: 0;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 34px; height: 34px; flex-shrink: 0; }
.brand__mark--sm { width: 20px; height: 20px; }

.brand__text h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  margin: 0;
  letter-spacing: 0.01em;
}

.brand__tagline {
  margin: 1px 0 0;
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.model-picker {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.model-picker__label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.model-picker__select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--ink-muted);
  font-size: 0.78rem;
  padding: 4px 24px 4px 8px;
  max-width: 160px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1 L5 5 L9 1' stroke='%23a89e92' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
}
.model-picker__select:hover { border-color: var(--brass); }
.model-picker__select:focus-visible { outline: 2px solid var(--brass); outline-offset: 1px; }

.status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-transform: lowercase;
}

.status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--sage);
  box-shadow: 0 0 0 3px var(--sage-soft);
}
.status__dot.busy { background: var(--brass); box-shadow: 0 0 0 3px var(--brass-soft); }

.bench-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink-muted);
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 0.78rem;
  cursor: pointer;
}
.bench-toggle svg { width: 15px; height: 15px; }

/* ---------- Layout ---------- */

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 320px;
  min-height: 0;
}

.chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--border);
}

.chat__log {
  flex: 1;
  overflow-y: auto;
  padding: 26px 26px 6px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---------- Messages ---------- */

.msg {
  max-width: 62ch;
  line-height: 1.55;
  font-size: 0.96rem;
  animation: rise 0.25s ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg--user {
  align-self: flex-end;
  background: var(--brass-soft);
  border: 1px solid var(--brass-soft);
  color: var(--ink);
  padding: 10px 15px;
  border-radius: 12px 12px 3px 12px;
}

.msg--assistant {
  align-self: flex-start;
  padding: 2px 0 2px 0;
  white-space: pre-wrap;
}

.msg--assistant::before {
  content: attr(data-name);
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 3px;
}

.msg--system {
  align-self: center;
  font-size: 0.76rem;
  color: var(--ink-faint);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 5px 0;
  width: 100%;
  text-align: center;
}

.msg--system.is-error { color: var(--error); }

/* ---------- Tool ticket (signature element) ---------- */

.ticket {
  align-self: stretch;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 14px;
  max-width: 62ch;
}

.ticket__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.ticket__name {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink);
}

.ticket__kind {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-left: 8px;
}

.stamp {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1.5px solid var(--brass);
  color: var(--brass);
  padding: 3px 9px;
  border-radius: 4px;
  transform: rotate(-4deg);
  white-space: nowrap;
  flex-shrink: 0;
}
.stamp.approved { border-color: var(--sage); color: var(--sage); }
.stamp.rejected { border-color: var(--error); color: var(--error); }

.ticket__desc {
  margin: 8px 0 4px;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.ticket__reason {
  margin: 0 0 10px;
  font-size: 0.82rem;
  color: var(--ink-faint);
  font-style: italic;
}

.ticket details {
  margin: 8px 0 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
}

.ticket summary {
  cursor: pointer;
  padding: 7px 11px;
  font-size: 0.76rem;
  color: var(--ink-muted);
  background: var(--surface-2);
  user-select: none;
}

.ticket pre {
  margin: 0;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.79rem;
  line-height: 1.5;
  color: var(--ink);
  overflow-x: auto;
  background: #16130f;
}

.ticket__actions {
  display: flex;
  gap: 8px;
}

.ticket__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 7px;
  padding: 7px 13px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
}
.ticket__btn svg { width: 14px; height: 14px; }

.ticket__btn--approve {
  background: var(--sage-soft);
  border-color: var(--sage);
  color: var(--sage);
}
.ticket__btn--approve:hover { background: var(--sage); color: #16130f; }

.ticket__btn--reject {
  background: transparent;
  border-color: var(--border);
  color: var(--ink-muted);
}
.ticket__btn--reject:hover { border-color: var(--error); color: var(--error); }

.ticket__resolved {
  font-size: 0.8rem;
  color: var(--ink-faint);
}

/* ---------- Thinking indicator ---------- */

.thinking {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 26px 10px;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.dots { display: inline-flex; gap: 3px; }
.dots i {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--brass);
  animation: blink 1.1s infinite ease-in-out;
}
.dots i:nth-child(2) { animation-delay: 0.15s; }
.dots i:nth-child(3) { animation-delay: 0.3s; }

@keyframes blink {
  0%, 80%, 100% { opacity: 0.2; }
  40% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .msg, .dots i { animation: none; }
}

/* ---------- Composer ---------- */

.composer {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 22px 20px;
  border-top: 1px solid var(--border);
}

.composer textarea {
  flex: 1;
  resize: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  color: var(--ink);
  font-size: 0.94rem;
  max-height: 160px;
  line-height: 1.4;
}
.composer textarea:focus {
  outline: none;
  border-color: var(--brass);
}
.composer textarea::placeholder { color: var(--ink-faint); }

.composer button {
  background: var(--brass);
  border: none;
  color: #1c1917;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.composer button svg { width: 18px; height: 18px; }
.composer button:hover { background: #d6ab5c; }
.composer button:focus-visible,
.ticket__btn:focus-visible,
.bench-toggle:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }

/* ---------- Toolbench ---------- */

.toolbench {
  padding: 22px 20px;
  overflow-y: auto;
  background: var(--surface);
}

.toolbench h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0 0 4px;
}

.toolbench__hint {
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin: 0 0 16px;
}

.toolbench__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-row {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
}

.tool-row__dot {
  width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0;
}
.tool-row__dot.approved { background: var(--sage); }
.tool-row__dot.pending { background: var(--brass); }
.tool-row__dot.rejected { background: var(--error); }

.tool-row__name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-row__status {
  margin-left: auto;
  font-size: 0.68rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.toolbench__empty {
  font-size: 0.8rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .bench-toggle { display: inline-flex; }
  .toolbench {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(84vw, 340px);
    transform: translateX(100%);
    transition: transform 0.2s ease;
    border-left: 1px solid var(--border);
    z-index: 20;
  }
  .toolbench.open { transform: translateX(0); }
  .chat { border-right: none; }
  .chat__log { padding: 18px 16px 6px; }
  .composer { padding: 12px 16px 16px; }
}