:root {
  --bg: #ffffff;
  --bg-alt: #f6f6f4;
  --bg-inset: #ececea;
  --fg: #1b1b19;
  --fg-dim: #6b6b66;
  --line: #dcdcd8;
  --accent: #9a5433;
  --accent-fg: #ffffff;
  --danger: #a3342a;
  --ok: #2f6b45;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161715;
    --bg-alt: #1e201d;
    --bg-inset: #282a26;
    --fg: #eceae4;
    --fg-dim: #9a988f;
    --line: #34362f;
    --accent: #d08a5e;
    --accent-fg: #1b1b19;
    --danger: #e08074;
    --ok: #7fbf95;
  }
}

:root[data-theme="light"] {
  --bg: #ffffff; --bg-alt: #f6f6f4; --bg-inset: #ececea;
  --fg: #1b1b19; --fg-dim: #6b6b66; --line: #dcdcd8;
  --accent: #9a5433; --accent-fg: #ffffff;
  --danger: #a3342a; --ok: #2f6b45;
}
:root[data-theme="dark"] {
  --bg: #161715; --bg-alt: #1e201d; --bg-inset: #282a26;
  --fg: #eceae4; --fg-dim: #9a988f; --line: #34362f;
  --accent: #d08a5e; --accent-fg: #1b1b19;
  --danger: #e08074; --ok: #7fbf95;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

button, select, input, textarea {
  font: inherit;
  color: inherit;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 10px;
}
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--fg-dim); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: transparent; }
button.danger { color: var(--danger); }

/* ---------- login ---------- */
.center-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  width: 100%;
  max-width: 340px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px;
}
.card h1 { margin: 0 0 4px; font-size: 19px; }
.card p.sub { margin: 0 0 18px; color: var(--fg-dim); font-size: 13px; }
.card input { width: 100%; margin-bottom: 10px; }
.card button { width: 100%; }
.error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 8px; }

/* ---------- app shell ---------- */
.app { display: grid; grid-template-columns: 264px 1fr; height: 100vh; }

.sidebar {
  background: var(--bg-alt);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.icon-btn {
  display: none;
  width: 34px;
  height: 34px;
  padding: 0;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1;
  flex: 0 0 auto;
}

.sidebar-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
}

.sidebar-backdrop { display: none; }
.sidebar-head { padding: 14px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 600; font-size: 14px; margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; }
.brand small { color: var(--fg-dim); font-weight: 400; font-family: var(--mono); font-size: 11px; }
.sidebar-head select { width: 100%; margin-bottom: 8px; }
.sidebar-head button { width: 100%; }

.session-list { flex: 1; overflow-y: auto; padding: 8px; min-height: 0; }
.session {
  padding: 8px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
}
.session:hover { background: var(--bg-inset); }
.session[aria-current="true"] { background: var(--bg-inset); box-shadow: inset 2px 0 0 var(--accent); }
.session .title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session .count { color: var(--fg-dim); font-size: 11px; font-family: var(--mono); flex-shrink: 0; }

.sidebar-foot {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  font-size: 12px;
}
.sidebar-foot a { color: var(--fg-dim); text-decoration: none; }
.sidebar-foot a:hover { color: var(--fg); }

/* ---------- chat ---------- */
.chat { display: flex; flex-direction: column; min-height: 0; }
.chat-head {
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 10px;
  align-items: center;
}
.chat-head h2 { margin: 0; font-size: 15px; font-weight: 600; flex: 1; }
.chat-head .meta { color: var(--fg-dim); font-size: 12px; font-family: var(--mono); }

.transcript { flex: 1; overflow-y: auto; padding: 18px; min-height: 0; }
.msg { max-width: 760px; margin: 0 auto 18px; }
.msg .who {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--fg-dim);
  margin-bottom: 5px;
}
.msg .body { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user .body {
  background: var(--bg-inset);
  padding: 10px 12px;
  border-radius: var(--radius);
}
.msg.error .body { color: var(--danger); }
.msg.tool .body { color: var(--fg-dim); font-family: var(--mono); font-size: 12.5px; }

/* Sent by the server to resume an interrupted turn, not typed by the user. */
.msg.user.auto .body {
  background: none;
  border: 1px dashed var(--line);
  color: var(--fg-dim);
  font-size: 13px;
}

/* Queued behind a running turn — sent, but not started yet. */
.msg.pending .body { opacity: .55; border: 1px dashed var(--line); }
.msg.pending .who::after {
  content: ' · queued';
  letter-spacing: 0;
  text-transform: none;
}

.project-chip {
  display: inline-block;
  margin: 4px 6px 0 0;
  padding: 5px 10px;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  text-decoration: none;
}
.project-chip:hover { border-color: var(--accent); }

.composer {
  border-top: 1px solid var(--line);
  padding: 12px 18px;
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.composer textarea {
  flex: 1;
  resize: none;
  min-height: 42px;
  max-height: 200px;
  font-family: var(--sans);
}
.notice { color: var(--fg-dim); font-size: 12px; padding: 0 18px 10px; }
.notice.warn { color: var(--danger); }

.empty { color: var(--fg-dim); text-align: center; margin-top: 15vh; }

/* ---------- status / projects pages ---------- */
.page { max-width: 860px; margin: 0 auto; padding: 28px 20px 60px; }
.page h1 { font-size: 20px; margin: 0 0 4px; }
.page .sub { color: var(--fg-dim); font-size: 13px; margin: 0 0 22px; }
.page h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .06em; color: var(--fg-dim); margin: 28px 0 10px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tile { background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.tile .k { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--fg-dim); }
.tile .v { font-size: 18px; font-family: var(--mono); margin-top: 4px; }
.tile .v.bad { color: var(--danger); }
.tile .v.good { color: var(--ok); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--fg-dim); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; }
td.mono { font-family: var(--mono); font-size: 12px; }

.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-family: var(--mono); background: var(--bg-inset); }
.pill.bad { color: var(--danger); }
.pill.good { color: var(--ok); }

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .menu-toggle { display: inline-flex; }
  .sidebar { display: none; }
  .sidebar.open {
    display: flex;
    position: fixed;
    inset: 0 auto 0 0;
    width: min(86vw, 320px);
    z-index: 20;
    box-shadow: 4px 0 24px rgba(0, 0, 0, .35);
  }
  .sidebar.open .sidebar-close { display: flex; }
  .sidebar-backdrop.open {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    z-index: 15;
  }
}