/* omnimind chat — hand-rolled, deliberately plain-software look.
   no gradients, no glassmorphism, no purple. */

:root {
  --field: #ffffff;
  --bg: #f6f4ef;
  --panel: #fbfaf7;
  --ink: #23211c;
  --ink-dim: #6f6a5e;
  --line: #d8d3c8;
  --accent: #b0492f;      /* burnt sienna, not blue/purple */
  --accent-ink: #fff;
  --code-bg: #eee9df;
  --user-bubble: #e9e4d8;
  --ok: #3e6b3a;
  color-scheme: light;
}
html[data-theme="dark"] {
  --field: #161411;
  --bg: #191713;
  --panel: #201d18;
  --ink: #d6d0c4;
  --ink-dim: #8a8375;
  --line: #3a362e;
  --accent: #d4694a;
  --accent-ink: #191713;
  --code-bg: #2a261f;
  --user-bubble: #2e2a22;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 ui-serif, Georgia, "Iowan Old Style", serif;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select {
  font: inherit;
  color: inherit;
}
a { color: var(--accent); }

/* ---------- auth ---------- */
#auth {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-card {
  width: 340px;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 28px 26px 22px;
}
.auth-card h1 {
  font-size: 21px;
  margin: 0 0 2px;
  letter-spacing: -0.02em;
}
.auth-card .sub {
  color: var(--ink-dim);
  font-size: 13px;
  margin-bottom: 18px;
}
.auth-card label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  margin: 12px 0 4px;
}
.auth-card input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: var(--field);
  outline: none;
}
.auth-card input:focus { border-color: var(--accent); }
.btn {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  padding: 8px 14px;
  cursor: pointer;
}
.btn:hover { background: #000; }
.btn.secondary {
  background: transparent;
  color: var(--ink);
}
.btn.secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: default; }
.auth-card .row { display: flex; gap: 8px; margin-top: 18px; }
.auth-card .row .btn { flex: 1; }
.err { color: var(--accent); font-size: 13px; margin-top: 10px; min-height: 1em; }

/* ---------- app shell ---------- */
#app { display: none; height: 100%; }
#app.on { display: grid; grid-template-columns: 250px 1fr; }
@media (max-width: 760px) {
  #app.on { grid-template-columns: 1fr; }
  #sidebar { display: none; }
  #sidebar.open {
    display: block; position: fixed; inset: 0 30% 0 0;
    z-index: 20; background: var(--panel); border-right: 1px solid var(--line);
  }
}

#sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.side-head {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--line);
}
.side-head .brand {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
}
.side-head .who {
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.side-head .who a { font-size: 12px; }
#new-chat {
  margin: 12px 14px 4px;
  width: calc(100% - 28px);
}
#chat-list {
  overflow-y: auto;
  flex: 1;
  padding: 6px 8px;
}
.chat-item {
  padding: 7px 10px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  justify-content: space-between;
  gap: 6px;
}
.chat-item:hover { background: var(--code-bg); }
.chat-item.active { background: var(--user-bubble); font-weight: 600; }
.chat-item .del {
  visibility: hidden;
  color: var(--ink-dim);
  font-size: 12px;
  border: none; background: none; cursor: pointer; padding: 0 2px;
}
.chat-item:hover .del { visibility: visible; }
.chat-item .del:hover { color: var(--accent); }
.side-foot {
  border-top: 1px solid var(--line);
  padding: 10px 14px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.side-foot button {
  border: none; background: none; cursor: pointer;
  font-size: 12.5px; color: var(--ink-dim); padding: 2px 0;
}
.side-foot button:hover { color: var(--accent); }

/* ---------- main ---------- */
#main { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
#topbar {
  border-bottom: 1px solid var(--line);
  padding: 10px 18px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--panel);
}
#burger { display: none; }
@media (max-width: 760px) { #burger { display: block; } }
#topbar select {
  padding: 5px 8px;
  border: 1px solid var(--line);
  background: var(--field);
  max-width: 220px;
}
#topbar .spacer { flex: 1; }
#topbar .title {
  font-size: 14px;
  color: var(--ink-dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
#topbar button.mini {
  border: 1px solid var(--line); background: var(--field); cursor: pointer;
  padding: 5px 10px; font-size: 12.5px;
}
#topbar button.mini:hover { border-color: var(--accent); color: var(--accent); }

#log {
  flex: 1;
  overflow-y: auto;
  padding: 26px 0 10px;
}
.msg {
  max-width: 720px;
  margin: 0 auto 22px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 14px;
}
.msg .who {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  padding-top: 4px;
  text-align: right;
}
.msg .who .dot {
  display: block;
  width: 7px; height: 7px;
  border-radius: 50%;
  margin: 0 4px 6px auto;
  background: var(--line);
}
.msg.user .who .dot { background: var(--accent); }
.msg .body { min-width: 0; }
.msg.assistant .body {
  border-left: 2px solid var(--line);
  padding-left: 14px;
}
.msg .body p { margin: 0 0 0.8em; }
.msg .body pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 10px 12px;
  overflow-x: auto;
  font: 12.5px/1.5 ui-monospace, "SF Mono", Menlo, monospace;
}
.msg .body code {
  font: 0.92em ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--code-bg);
  padding: 1px 4px;
}
.msg .body pre code { background: none; padding: 0; }
.sysnote {
  max-width: 720px; margin: 0 auto 22px; padding: 0 24px;
  font-size: 12.5px; color: var(--ink-dim); text-align: center;
}
.empty {
  max-width: 560px; margin: 12vh auto 0; padding: 0 24px;
  color: var(--ink-dim);
}
.empty h2 { color: var(--ink); font-size: 20px; margin: 0 0 6px; }

/* composer */
#composer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 12px 24px 14px;
}
.comp-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
#input {
  flex: 1;
  resize: none;
  border: 1px solid var(--line);
  background: var(--field);
  padding: 9px 12px;
  min-height: 42px;
  max-height: 200px;
  outline: none;
  line-height: 1.5;
}
#input:focus { border-color: var(--accent); }
#send { padding: 9px 18px; }

/* settings modal */
.modal-back {
  position: fixed; inset: 0;
  background: rgba(35, 33, 28, 0.35);
  display: none;
  place-items: center;
  z-index: 50;
}
.modal-back.on { display: grid; }
.modal {
  width: min(560px, calc(100vw - 40px));
  max-height: 84vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--ink);
  padding: 22px 24px;
}
.modal h2 { margin: 0 0 14px; font-size: 17px; }
.modal label {
  display: block; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink-dim); margin: 14px 0 4px;
}
.modal input[type=text], .modal input[type=password], .modal textarea, .modal select {
  width: 100%; padding: 7px 10px;
  border: 1px solid var(--line); background: var(--field); outline: none;
}
.modal textarea { min-height: 70px; resize: vertical; }
.modal .modal-row { display: flex; gap: 8px; margin-top: 20px; }
.modal .modal-row .btn { flex: 1; }
.prov-item {
  border: 1px solid var(--line);
  padding: 10px 12px;
  margin-top: 8px;
  font-size: 13px;
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
}
.prov-item .name { font-weight: 600; }
.prov-item .meta { color: var(--ink-dim); }
.prov-item button { border: none; background: none; color: var(--ink-dim); cursor: pointer; }
.prov-item button:hover { color: var(--accent); }
.mem-list { font-size: 13px; }
.mem-list .mem-row { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.mem-list input { flex: 1; }

/* theme toggle */
#theme-btn { font-size: 14px; line-height: 1; }

/* image attach */
#attach-btn { font-size: 14px; line-height: 1; }
#preview-row {
  max-width: 720px; margin: 0 auto 6px;
  display: none; gap: 8px; flex-wrap: wrap;
}
#preview-row.on { display: flex; }
#preview-row .thumb { position: relative; }
#preview-row img {
  height: 56px; border: 1px solid var(--line); display: block;
}
#preview-row .rm {
  position: absolute; top: -6px; right: -6px;
  width: 18px; height: 18px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--panel);
  color: var(--ink-dim); font-size: 11px; line-height: 1;
  cursor: pointer;
}
.msg .body img.chat-img {
  max-width: 320px; max-height: 240px;
  display: block; margin: 6px 0;
  border: 1px solid var(--line);
}
.msg-tools {
  margin-top: 4px;
  display: flex; gap: 10px;
}
.msg-tools button {
  border: none; background: none; cursor: pointer;
  font-size: 11.5px; color: var(--ink-dim); padding: 0;
  text-transform: lowercase;
}
.msg-tools button:hover { color: var(--accent); }