/* RepoChat — clean black & white UI */
:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #6b6b6b;
  --faint: #969696;
  --line: #e4e4e4;
  --line-strong: #cfcfcf;
  --surface: #f7f7f7;
  --surface-2: #f0f0f0;
  --accent: #111111;
  --accent-fg: #ffffff;
  --danger: #b00020;
  --code-bg: #f4f4f4;
  --radius: 10px;
  --maxw: 1180px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --fg: #f2f2f2;
    --muted: #a0a0a0;
    --faint: #757575;
    --line: #262626;
    --line-strong: #3a3a3a;
    --surface: #161616;
    --surface-2: #1f1f1f;
    --accent: #f2f2f2;
    --accent-fg: #0d0d0d;
    --danger: #ff6b81;
    --code-bg: #1a1a1a;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border: 1.5px solid var(--fg);
  border-radius: 7px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.5px;
}
.brand-name { font-weight: 650; letter-spacing: -0.2px; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.repo-badge {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 4px 9px;
  border-radius: 999px;
  max-width: 38vw;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ---------- buttons ---------- */
button { font-family: inherit; cursor: pointer; }
.primary-btn {
  background: var(--accent);
  color: var(--accent-fg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 11px 18px;
  font-size: 14.5px;
  font-weight: 600;
  transition: opacity .12s ease;
}
.primary-btn:hover { opacity: .85; }
.primary-btn:disabled { opacity: .45; cursor: not-allowed; }
.secondary-btn {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 550;
  width: 100%;
  transition: background .12s ease;
}
.secondary-btn:hover { background: var(--surface); }
.ghost-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 13.5px;
}
.ghost-btn:hover { color: var(--fg); background: var(--surface); }
.ghost-btn.full { width: 100%; margin-top: 8px; border: 1px solid var(--line); }

/* ---------- setup view ---------- */
.setup {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 48px 20px;
}
.setup-card { width: 100%; max-width: 640px; }
.setup-card h1 {
  font-size: clamp(26px, 4vw, 38px);
  letter-spacing: -0.8px;
  margin: 0 0 14px;
  line-height: 1.1;
}
.lede { color: var(--muted); font-size: 16px; margin: 0 0 28px; }

.load-form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label { font-size: 13.5px; font-weight: 600; }
.field-label code { font-family: var(--mono); font-size: 12.5px; background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
.req { color: var(--danger); font-weight: 500; font-size: 12px; }
.opt { color: var(--faint); font-weight: 500; font-size: 12px; }
.field-hint { font-size: 12.5px; color: var(--faint); }
input, select, textarea {
  font-family: inherit;
  font-size: 14.5px;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 11px 13px;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--fg);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--fg) 12%, transparent);
}
select { appearance: none; cursor: pointer; }

.advanced {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.advanced summary {
  cursor: pointer;
  padding: 12px 14px;
  font-size: 13.5px;
  font-weight: 600;
  user-select: none;
}
.advanced summary::-webkit-details-marker { color: var(--faint); }
.advanced-body { padding: 4px 14px 16px; display: flex; flex-direction: column; gap: 16px; }

.status { font-size: 13.5px; color: var(--muted); min-height: 18px; margin: 2px 0 0; }
.status.error { color: var(--danger); }

.examples { margin-top: 28px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.examples-label { font-size: 13px; color: var(--faint); }
.chip {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 11px;
}
.chip:hover { color: var(--fg); border-color: var(--line-strong); }

/* ---------- chat view ---------- */
.chat {
  flex: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  min-height: 0;
}
.sidebar {
  border-right: 1px solid var(--line);
  padding: 22px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-section { display: flex; flex-direction: column; gap: 10px; }
.sidebar-head { display: flex; flex-direction: column; gap: 2px; }
.sidebar-head h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: -0.4px;
  word-break: break-all;
}
.repo-link { font-size: 12.5px; color: var(--muted); text-decoration: none; }
.repo-link:hover { color: var(--fg); text-decoration: underline; }
.repo-desc { font-size: 13.5px; color: var(--muted); margin: 0; }
.repo-meta { margin: 6px 0 4px; display: flex; flex-direction: column; gap: 6px; }
.repo-meta > div { display: flex; justify-content: space-between; font-size: 13px; }
.repo-meta dt { color: var(--faint); margin: 0; }
.repo-meta dd { color: var(--fg); margin: 0; font-family: var(--mono); font-size: 12.5px; }

.files-section h3 { margin: 0 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--faint); }
.file-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1px; }
.file-list li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding: 2px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversation {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 28px 28px 12px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.msg { display: flex; flex-direction: column; gap: 6px; max-width: 760px; }
.msg-role { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--faint); font-weight: 600; }
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.user .msg-body {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 14px 14px 4px 14px;
  padding: 11px 15px;
}
.msg.assistant .msg-body { padding: 0; }
.msg-body { font-size: 15px; word-wrap: break-word; overflow-wrap: anywhere; }
.msg-body p { margin: 0 0 12px; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body ul, .msg-body ol { margin: 0 0 12px; padding-left: 22px; }
.msg-body li { margin: 3px 0; }
.msg-body h1, .msg-body h2, .msg-body h3 { margin: 18px 0 8px; line-height: 1.25; letter-spacing: -0.3px; }
.msg-body h1 { font-size: 19px; }
.msg-body h2 { font-size: 17px; }
.msg-body h3 { font-size: 15.5px; }
.msg-body code {
  font-family: var(--mono);
  font-size: 12.8px;
  background: var(--code-bg);
  padding: 1.5px 5px;
  border-radius: 5px;
}
.msg-body pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 15px;
  overflow-x: auto;
  margin: 0 0 12px;
}
.msg-body pre code { background: none; padding: 0; font-size: 12.5px; line-height: 1.5; }
.msg-body a { color: var(--fg); }
.msg-body blockquote {
  border-left: 3px solid var(--line-strong);
  margin: 0 0 12px;
  padding: 2px 0 2px 14px;
  color: var(--muted);
}
.cite {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 5px;
  color: var(--muted);
}
.msg-body table { border-collapse: collapse; margin: 0 0 12px; font-size: 13.5px; }
.msg-body th, .msg-body td { border: 1px solid var(--line); padding: 5px 10px; text-align: left; }

.typing { display: inline-flex; gap: 4px; padding: 4px 0; }
.typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--faint);
  animation: blink 1.2s infinite both;
}
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

.empty-state { color: var(--faint); font-size: 14.5px; max-width: 520px; }
.empty-state strong { color: var(--muted); }

.chat-form {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 16px 28px 22px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.chat-input { resize: none; max-height: 200px; line-height: 1.45; }
.send { flex-shrink: 0; }

/* ---------- dialog ---------- */
.dialog {
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  width: min(460px, 92vw);
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.dialog::backdrop { background: rgba(0,0,0,.45); }
.dialog-body { padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.dialog-body h2 { margin: 0; font-size: 19px; letter-spacing: -0.3px; }
.dialog-note { font-size: 12.5px; color: var(--faint); margin: 0; }
.dialog-actions { display: flex; align-items: center; gap: 8px; }
.dialog-actions .spacer { flex: 1; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .chat { grid-template-columns: 1fr; }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
    max-height: 220px;
  }
  .files-section { display: none; }
  .messages, .chat-form { padding-left: 18px; padding-right: 18px; }
  .repo-badge { display: none; }
}