:root {
  --bg: #f6f5f1;
  --panel: #ffffff;
  --side: #ecebe5;
  --text: #1d1f1e;
  --muted: #666b68;
  --line: #d9d7cf;
  --accent: #1f6f5c;
  --accent-text: #ffffff;
  --accent-soft: #dcefe9;
  --danger: #b3261e;
  --user: #e4efe9;
  --code: #f0efe9;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161817;
    --panel: #1d201f;
    --side: #111312;
    --text: #e8eae8;
    --muted: #9aa19d;
    --line: #313634;
    --accent: #4fb89d;
    --accent-text: #0c1512;
    --accent-soft: #1d3a32;
    --danger: #f2877f;
    --user: #223a33;
    --code: #262a28;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1rem; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 0; }

input, textarea, select, button { font: inherit; color: inherit; }
input[type=text], input[type=password], input[type=url], textarea, select {
  width: 100%;
  padding: .55rem .7rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}
select { width: auto; max-width: 16rem; padding: .3rem .5rem; }
textarea { resize: vertical; }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, .dropzone:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
button { cursor: pointer; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); padding: .5rem .9rem; }
button:disabled { opacity: .55; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; font-weight: 600; }
button.link { border: 0; background: none; padding: .2rem .3rem; color: var(--accent); }
button.wide { width: 100%; }

/* Login */
.login { min-height: 100%; display: grid; place-items: center; padding: 1rem; }
.login-card {
  width: 100%; max-width: 22rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.75rem; display: grid; gap: .9rem;
}
.login-card label { display: grid; gap: .3rem; font-size: .9rem; color: var(--muted); }
.login-card p { margin: 0; }

/* Layout */
.app { height: 100%; display: grid; grid-template-columns: 17rem minmax(0, 1fr); }
.sidebar {
  background: var(--side); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: .75rem; padding: 1rem; min-height: 0;
}
.brand { font-weight: 700; font-size: 1.05rem; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem; }
.tab.active { background: var(--accent-soft); border-color: var(--accent); font-weight: 600; }
.chat-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; min-height: 0; }
.chat-list li { display: flex; align-items: center; border-radius: 8px; }
.chat-list li.active { background: var(--accent-soft); }
.chat-list li:hover { background: var(--line); }
.chat-list li.active:hover { background: var(--accent-soft); }
.chat-list .open {
  flex: 1; min-width: 0; text-align: left; border: 0; background: none;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: .45rem .6rem;
}
.chat-list .remove { border: 0; background: none; color: var(--muted); padding: .3rem .55rem; visibility: hidden; }
.chat-list li:hover .remove, .chat-list li:focus-within .remove { visibility: visible; }
.sidebar-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; font-size: .9rem; }
.menu-toggle { display: none; }

.panel { min-width: 0; min-height: 0; height: 100%; display: flex; flex-direction: column; }
.panel.scroll { overflow-y: auto; display: block; }
.content { max-width: 60rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }

/* Chat */
.messages { flex: 1; overflow-y: auto; padding: 1.25rem; min-height: 0; }
.empty { max-width: 32rem; margin: 18vh auto 0; text-align: center; }
.msg { max-width: 48rem; margin: 0 auto 1.1rem; }
.msg .who { font-size: .78rem; color: var(--muted); margin-bottom: .2rem; }
.msg.user .bubble { background: var(--user); border-radius: 12px; padding: .65rem .9rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.assistant .bubble { overflow-wrap: anywhere; }
.msg .failure { color: var(--danger); margin-top: .4rem; }
.bubble > :first-child { margin-top: 0; }
.bubble > :last-child { margin-bottom: 0; }
.bubble p { margin: .6em 0; }
.bubble ul, .bubble ol { margin: .6em 0; padding-left: 1.4em; }
.bubble h1, .bubble h2, .bubble h3, .bubble h4 { font-size: 1.05rem; margin: 1em 0 .4em; }
.bubble code { background: var(--code); padding: .1em .35em; border-radius: 5px; font: .88em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.bubble pre { background: var(--code); padding: .8rem; border-radius: 8px; overflow-x: auto; }
.bubble pre code { background: none; padding: 0; }
.bubble blockquote { margin: .6em 0; padding-left: .8em; border-left: 3px solid var(--line); color: var(--muted); }
.bubble a { color: var(--accent); }
.bubble table { border-collapse: collapse; display: block; overflow-x: auto; margin: .6em 0; }
.bubble th, .bubble td { border: 1px solid var(--line); padding: .3rem .6rem; text-align: left; }
.bubble hr { border: 0; border-top: 1px solid var(--line); margin: 1em 0; }
.sources { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .6rem; }
.sources button { font-size: .8rem; padding: .15rem .55rem; border-radius: 999px; color: var(--muted); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cursor::after { content: "▍"; color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.composer { border-top: 1px solid var(--line); background: var(--panel); padding: .8rem 1.25rem; }
.composer-row { max-width: 48rem; margin: 0 auto; display: flex; gap: .5rem; align-items: flex-end; }
.composer-row textarea { max-height: 14rem; resize: none; }
.composer-options { max-width: 48rem; margin: .5rem auto 0; display: flex; flex-wrap: wrap; gap: .4rem 1rem; align-items: center; font-size: .85rem; color: var(--muted); }
.composer-options label { display: flex; align-items: center; gap: .4rem; }

.chips { display: flex; flex-wrap: wrap; gap: .35rem .6rem; align-items: center; margin-top: .5rem; font-size: .8rem; color: var(--muted); }
.chips .link { font-size: .8rem; padding: 0; }
.remembered { margin-top: .5rem; font-size: .82rem; color: var(--muted); background: var(--accent-soft); border-radius: 8px; padding: .4rem .65rem; }
.remembered button { font-size: .82rem; padding: 0; font-weight: 600; }
.remembered ul { margin: .2rem 0 0; padding-left: 1.2em; }

/* Knowledge */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 1rem; margin: 1rem 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; display: grid; gap: .6rem; align-content: start; }
.card form { display: grid; gap: .6rem; margin-top: .4rem; }
.card button.primary { justify-self: start; }
.inline { display: flex; gap: .5rem; }
.dropzone {
  display: grid; gap: .2rem; text-align: center; cursor: pointer;
  border: 2px dashed var(--line); border-radius: 10px; padding: 1.4rem .8rem;
}
.dropzone.over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone span { font-size: .85rem; }
.automation { margin-bottom: 1rem; }
.check { display: flex; gap: .6rem; align-items: flex-start; cursor: pointer; }
.check input { margin-top: .3rem; width: 1rem; height: 1rem; accent-color: var(--accent); flex: none; }
.auto-row { display: flex; gap: .8rem; align-items: flex-start; flex-wrap: wrap; }
.auto-row span { flex: 1; min-width: 14rem; }
.bookmarklet, .button-link {
  display: inline-block; text-decoration: none; font-weight: 600; white-space: nowrap;
  border: 1px solid var(--accent); color: var(--accent); border-radius: 8px; padding: .4rem .8rem; cursor: grab;
}
.button-link { cursor: pointer; }
.small { font-size: .85rem; margin: 0; }
.capture-card { text-align: center; }
.capture-card .inline { justify-content: center; }
.capture-title { font-weight: 600; overflow-wrap: anywhere; }
.notice { background: var(--accent-soft); border-radius: 8px; padding: .6rem .8rem; white-space: pre-wrap; }
.notice.bad { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.docs { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.docs th { text-align: left; font-size: .8rem; color: var(--muted); font-weight: 600; }
.docs th, .docs td { padding: .5rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.docs td.title { overflow-wrap: anywhere; }
.docs td.nowrap { white-space: nowrap; }

.dialog { width: min(52rem, 94vw); max-height: 86vh; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); padding: 0; }
.dialog::backdrop { background: rgba(0, 0, 0, .45); }
.dialog header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .8rem 1rem; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--panel); }
.dialog header h3 { margin: 0; overflow-wrap: anywhere; }
.dialog pre { margin: 0; padding: 1rem; white-space: pre-wrap; overflow-wrap: anywhere; font: .9rem/1.5 system-ui, sans-serif; }

@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: min(18rem, 85vw); z-index: 20; transform: translateX(-100%); transition: transform .15s; }
  .sidebar.open { transform: none; box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .4); }
  .menu-toggle { display: block; position: fixed; top: .5rem; left: .5rem; z-index: 10; padding: .3rem .6rem; }
  .messages { padding-top: 3.2rem; }
  .content { padding-top: 3.4rem; }
  .docs th:nth-child(2), .docs td:nth-child(2), .docs th:nth-child(4), .docs td:nth-child(4) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .cursor::after { animation: none; }
  .sidebar { transition: none; }
}