:root {
  color-scheme: light;
  --bg: #f7f3ea;
  --panel: #fffdf8;
  --panel-soft: #f0eadf;
  --text: #16130f;
  --muted: #6f6659;
  --line: #d7cbb8;
  --accent: #8d6b2f;
  --accent-strong: #5c4218;
  --danger: #9a3f2e;
  --shadow: #4d382214;
  --app-height: 100dvh;
}

* { box-sizing: border-box; }
html { background: var(--bg); height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
  font: 16px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, p { margin-top: 0; }
h1, h2 { font-weight: 600; letter-spacing: .02em; }
small, .preview, #room-state, .row small { color: var(--muted); }

button, input, textarea, select {
  font: inherit;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: .65rem .75rem;
}

button {
  color: #fffdf8;
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  cursor: pointer;
  font-weight: 600;
}
button:hover { background: var(--accent); }
button:disabled { opacity: .55; cursor: not-allowed; }

label { display: grid; gap: .4rem; margin: 1rem 0; }

.gate { display: grid; place-items: center; min-height: var(--app-height); padding: 1rem; }
.card, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1.25rem;
  box-shadow: 0 12px 32px var(--shadow);
}
.card { width: min(560px, 92vw); }
.admin { max-width: 960px; margin: 2rem auto; display: grid; gap: 1rem; padding: 0 1rem; }

.chat-shell {
  height: var(--app-height);
  overflow: hidden;
}
.chat-shell main {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: var(--app-height);
  min-width: 0;
}

#drawer {
  position: fixed;
  z-index: 20;
  inset: 3.35rem .75rem auto .75rem;
  max-height: min(70vh, 680px);
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem;
  overflow: auto;
  transform: translateY(calc(-100% - 4.5rem));
  transition: transform .16s ease-out;
  box-shadow: 0 0 0 100vmax #3d2c191f, 0 18px 48px var(--shadow);
}
body.menu-open #drawer { transform: translateY(0); }
.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
#menu-toggle, #menu-close {
  min-width: 2.5rem;
  padding: .45rem .65rem;
}
#drawer nav, #drawer #threads, .menu-actions, .commands { display: grid; gap: .45rem; }
.menu-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.commands { margin: .75rem 0 1rem; }
.commands button {
  display: grid;
  gap: .2rem;
  justify-items: start;
  color: var(--text);
  background: var(--panel-soft);
  border-color: var(--line);
  text-align: left;
  font-weight: 400;
}
.commands small { font-size: .75rem; }
#drawer a {
  display: block;
  padding: .45rem .55rem;
  border: 1px solid var(--line);
  background: var(--panel-soft);
}

header {
  position: relative;
  z-index: 15;
  display: flex;
  gap: .75rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding: .55rem .75rem;
  background: var(--panel);
  box-shadow: 0 4px 18px var(--shadow);
}
header h2 {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#room-state {
  margin-left: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#abort { padding: .45rem .65rem; }
#messages {
  min-height: 0;
  overflow: auto;
  padding: .75rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.bubble {
  max-width: min(900px, 92vw);
  border: 1px solid var(--line);
  padding: .65rem .8rem;
  background: var(--panel);
  white-space: normal;
  box-shadow: 0 4px 18px var(--shadow);
}
.bubble p { margin: .2rem 0; }
.bubble.user {
  align-self: flex-end;
  color: #fffdf8;
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}
.bubble.assistant { align-self: flex-start; }
.bubble.tool {
  align-self: stretch;
  color: var(--accent-strong);
  background: #fbf4e6;
  border-color: #c8ae7b;
}
.bubble.tool details { margin: 0; }
.bubble.tool summary {
  cursor: pointer;
  color: var(--accent-strong);
  list-style: disclosure-closed;
}
.bubble.tool details[open] summary {
  border-bottom: 1px solid var(--line);
  margin-bottom: .6rem;
  padding-bottom: .45rem;
}
.bubble pre {
  overflow: auto;
  background: #fffaf0;
  border: 1px solid var(--line);
  padding: .75rem;
}
.bubble code {
  color: var(--accent-strong);
  background: #fffaf0;
  padding: .1rem .25rem;
}

#composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 3.1rem auto;
  gap: .45rem;
  align-items: end;
  padding: .65rem .75rem calc(.65rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: var(--panel);
}
#input { resize: vertical; max-height: 35dvh; }
#mode {
  min-width: 0;
  padding: .45rem .2rem;
  text-align: center;
}

.row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: .75rem;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: .75rem 0;
}

@media (max-width: 800px) {
  #composer { grid-template-columns: minmax(0, 1fr) 3rem auto; }
  #input { max-height: 28dvh; }
  header { gap: .5rem; }
  #room-state { max-width: 35vw; }
  .menu-actions { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr; }
}