:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --panel: #fbfaf7;
  --surface: #ffffff;
  --surface-soft: #f2f0eb;
  --surface-hover: #ece9e2;
  --text: #1e201f;
  --text-soft: #636761;
  --text-faint: #8c908a;
  --line: rgba(31, 35, 32, 0.11);
  --line-strong: rgba(31, 35, 32, 0.18);
  --accent: #c72b46;
  --accent-deep: #a61935;
  --accent-soft: #f7e8eb;
  --violet: #6556c7;
  --violet-soft: #efedfb;
  --green: #2d8a59;
  --green-soft: #e8f5ed;
  --shadow-sm: 0 1px 2px rgba(20, 24, 21, 0.06), 0 4px 14px rgba(20, 24, 21, 0.04);
  --shadow-lg: 0 18px 55px rgba(20, 24, 21, 0.13), 0 3px 12px rgba(20, 24, 21, 0.06);
  --history-width: 276px;
  --drawer-width: 440px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #111311;
    --panel: #151815;
    --surface: #1b1e1b;
    --surface-soft: #202420;
    --surface-hover: #292d29;
    --text: #f0f1ed;
    --text-soft: #abb0a9;
    --text-faint: #7f867e;
    --line: rgba(244, 247, 241, 0.10);
    --line-strong: rgba(244, 247, 241, 0.17);
    --accent: #e34a64;
    --accent-deep: #f05b74;
    --accent-soft: rgba(227, 74, 100, 0.12);
    --violet: #aaa0ef;
    --violet-soft: rgba(133, 116, 231, 0.13);
    --green: #67c891;
    --green-soft: rgba(70, 179, 117, 0.12);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.22), 0 5px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.42), 0 4px 14px rgba(0, 0, 0, 0.25);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

button, textarea, input, select { font: inherit; }
button { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.app-shell { display: grid; grid-template-columns: var(--history-width) 1fr; height: 100dvh; }

.history-panel {
  position: relative;
  z-index: 20;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 18px 14px 14px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.brand-row, .brand, .history-footer, .topbar, .topbar-actions, .composer-footer,
.composer-modes, .drawer-header, .field-label, .seed-row, .drawer-footer {
  display: flex;
  align-items: center;
}

.brand-row { justify-content: space-between; padding: 0 5px 18px; }
.brand { gap: 11px; color: var(--text); text-decoration: none; }
.brand-mark, .welcome-mark {
  display: grid;
  place-items: center;
  color: white;
  background: linear-gradient(145deg, #ed4964, #c42040 58%, #94132e);
  box-shadow: 0 8px 20px rgba(177, 25, 53, 0.24), inset 0 1px 0 rgba(255,255,255,.3);
  font-weight: 760;
  letter-spacing: -.04em;
}
.brand-mark { width: 38px; height: 38px; border-radius: 12px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-copy strong { letter-spacing: -.02em; }
.brand-copy small { margin-top: 4px; color: var(--text-faint); font-size: 11px; }

.icon-button {
  display: grid;
  width: 36px;
  height: 36px;
  padding: 0;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 11px;
  color: var(--text-soft);
  background: transparent;
  cursor: pointer;
  font-size: 25px;
  font-weight: 300;
}
.icon-button:hover { border-color: var(--line); background: var(--surface-soft); color: var(--text); }

.new-chat {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-weight: 650;
  text-align: left;
}
.new-chat:hover { border-color: rgba(199, 43, 70, .35); color: var(--accent-deep); }
.new-chat span:first-child { color: var(--accent); font-size: 19px; line-height: 1; }

.history-heading { display: flex; justify-content: space-between; margin: 22px 9px 8px; color: var(--text-faint); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.history-heading button { padding: 0; border: 0; color: var(--text-faint); background: transparent; cursor: pointer; font-size: 11px; text-transform: none; }
.history-heading button:hover { color: var(--accent); }

.session-list { flex: 1; min-height: 0; overflow-y: auto; scrollbar-width: thin; }
.session-item {
  display: block;
  width: 100%;
  margin: 2px 0;
  padding: 10px 11px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-soft);
  background: transparent;
  cursor: pointer;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.session-item:hover { color: var(--text); background: var(--surface-soft); }
.session-item.active { border-color: var(--line); color: var(--text); background: var(--surface); box-shadow: var(--shadow-sm); }
.session-row { position:relative; display:flex; align-items:center; margin:2px 0; border:1px solid transparent; border-radius:10px; }
.session-row.active { border-color:var(--line); background:var(--surface); box-shadow:var(--shadow-sm); }
.session-row .session-item { flex:1; margin:0; border:0; background:transparent; box-shadow:none; }
.session-row.active .session-item { color:var(--text); }
.session-remove { width:28px; height:28px; margin-right:5px; border:0; border-radius:7px; color:var(--text-faint); background:transparent; cursor:pointer; font-size:18px; line-height:1; opacity:0; }
.session-row:hover .session-remove, .session-row.active .session-remove { opacity:1; }
.session-remove:hover { color:var(--accent-deep); background:var(--accent-soft); }
.session-empty { padding: 16px 10px; color: var(--text-faint); font-size: 13px; line-height: 1.5; }

.history-footer { justify-content: space-between; gap: 8px; padding: 14px 7px 2px; border-top: 1px solid var(--line); }
.history-footer a { color: var(--text-soft); text-decoration: none; font-size: 12px; }
.history-footer a:hover { color: var(--text); }
.zero-badge { display: flex; align-items: center; gap: 6px; color: var(--text-soft); font-size: 11px; font-weight: 650; }
.zero-badge i { width: 7px; height: 7px; border-radius: 50%; background: #2cbd6d; box-shadow: 0 0 0 3px rgba(44,189,109,.13); }

.chat-panel { display: grid; min-width: 0; height: 100dvh; grid-template-rows: 64px minmax(0, 1fr) auto; background: var(--bg); }
.topbar { position: relative; z-index: 10; justify-content: space-between; padding: 0 24px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(16px); }
.conversation-title { display: flex; min-width: 0; flex-direction: column; line-height: 1.2; }
.conversation-title strong { max-width: 380px; overflow: hidden; letter-spacing: -.015em; text-overflow: ellipsis; white-space: nowrap; }
.conversation-title span { margin-top: 3px; color: var(--text-faint); font-size: 11px; }
.topbar-actions { gap: 8px; }
.mode-chip { display: inline-flex; min-height: 29px; align-items: center; gap: 6px; padding: 4px 9px; border: 1px solid var(--line); border-radius: 999px; color: var(--text-soft); background: var(--surface); font-size: 11px; font-weight: 650; }
.mode-chip i { width: 6px; height: 6px; border-radius: 50%; background: var(--text-faint); }
.mode-chip.active-thinking { color: var(--violet); background: var(--violet-soft); border-color: color-mix(in srgb, var(--violet) 25%, transparent); }
.mode-chip.active-thinking i { background: var(--violet); }
.mode-chip.active-tools { color: var(--green); background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 25%, transparent); }
.mode-chip.active-tools i { background: var(--green); }
.settings-button { display: flex; min-height: 36px; align-items: center; gap: 7px; padding: 7px 11px; border: 1px solid var(--line-strong); border-radius: 11px; background: var(--surface); box-shadow: var(--shadow-sm); cursor: pointer; font-size: 13px; font-weight: 620; }
.settings-button:hover { border-color: rgba(199,43,70,.3); color: var(--accent-deep); }

.conversation { min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.welcome { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: clamp(58px, 11vh, 130px) 0 48px; text-align: center; }
.welcome-mark { width: 58px; height: 58px; margin: 0 auto 22px; border-radius: 18px; font-size: 23px; }
.eyebrow { margin: 0 0 9px; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .15em; }
.welcome h1 { margin: 0; font-family: ui-serif, Georgia, serif; font-size: clamp(34px, 5vw, 50px); font-weight: 520; letter-spacing: -.045em; }
.welcome-copy { max-width: 560px; margin: 15px auto 28px; color: var(--text-soft); font-size: 16px; line-height: 1.65; }
.suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; text-align: left; }
.suggestions button { min-height: 78px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow-sm); cursor: pointer; }
.suggestions button:hover { transform: translateY(-1px); border-color: rgba(199,43,70,.28); box-shadow: 0 8px 22px rgba(20,24,21,.08); }
.suggestions span, .suggestions small { display: block; }
.suggestions span { margin-bottom: 5px; font-weight: 680; }
.suggestions small { color: var(--text-faint); font-size: 12px; }

.message-list { width: min(820px, calc(100% - 40px)); margin: 0 auto; padding: 34px 0 70px; }
.message { position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 13px; margin-bottom: 28px; }
.message-avatar { display: grid; width: 34px; height: 34px; place-items: center; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); box-shadow: var(--shadow-sm); color: var(--text-soft); font-size: 12px; font-weight: 760; }
.message.user .message-avatar { color: white; border-color: transparent; background: linear-gradient(145deg, #d83954, #ad1a37); }
.message-body { min-width: 0; padding-top: 5px; }
.message-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.message-meta strong { font-size: 13px; }
.message-meta span { color: var(--text-faint); font-size: 10px; }
.message-content { color: var(--text); font-size: 15.5px; line-height: 1.72; overflow-wrap: anywhere; }
.message-content > :first-child { margin-top: 0; }
.message-content > :last-child { margin-bottom: 0; }
.message-content p { margin: 0 0 14px; }
.message-content ul, .message-content ol { padding-left: 22px; }
.message-content li { margin: 4px 0; }
.message-content ol { list-style-position: outside; }
.message-content table { width:100%; border-collapse:collapse; font-size:13px; line-height:1.45; }
.message-content th, .message-content td { min-width:120px; padding:9px 11px; border:1px solid var(--line-strong); text-align:left; vertical-align:top; }
.message-content th { color:var(--text); background:var(--surface-soft); font-weight:700; }
.message-content tr:nth-child(even) td { background:color-mix(in srgb, var(--surface-soft) 48%, transparent); }
.table-wrap { max-width:100%; margin:0 0 14px; overflow-x:auto; border:1px solid var(--line); border-radius:10px; }
.message-content pre { position: relative; max-width: 100%; overflow-x: auto; padding: 15px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-soft); font-size: 13px; line-height: 1.55; }
.message-content code { padding: .15em .35em; border-radius: 5px; background: var(--surface-soft); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88em; }
.message-content pre code { padding: 0; background: transparent; }
.message-content a { color: var(--accent-deep); text-underline-offset: 3px; }
.message-actions { display: flex; gap: 3px; margin-top: 10px; opacity: .35; transition: opacity .15s; }
.message.assistant .message-actions { opacity:.65; }
.message:hover .message-actions { opacity: 1; }
.message-actions button { padding: 5px 7px; border: 0; border-radius: 7px; color: var(--text-soft); background: transparent; cursor: pointer; font-size: 11px; }
.message-actions button:hover { background: var(--surface-soft); color: var(--text); }
.message-actions .feedback-button { min-width:28px; font-size:13px; opacity:.65; filter:grayscale(1); }
.message-actions .feedback-button:hover { opacity:1; filter:none; }
.message-actions .feedback-button.selected { opacity:1; filter:none; background:var(--accent-soft); box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 25%,transparent); }
.message-editor { display:grid; gap:9px; }
.message-editor textarea { width:100%; min-height:84px; resize:vertical; padding:10px 11px; border:1px solid var(--line-strong); border-radius:10px; outline:0; color:var(--text); background:var(--surface); font:inherit; line-height:1.5; }
.message-editor textarea:focus { border-color:rgba(199,43,70,.4); box-shadow:0 0 0 3px var(--accent-soft); }
.message-editor-actions { display:flex; gap:7px; justify-content:flex-end; }
.message-editor-actions button { min-height:32px; padding:6px 10px; font-size:11px; }
.message.pending .message-content:empty::after { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 13px 0 var(--accent), 26px 0 var(--accent); animation: pulse 1s infinite ease-in-out; }
@keyframes pulse { 0%,100% { opacity:.25; transform:translateY(0) } 50% { opacity:1; transform:translateY(-2px) } }

.reasoning-card, .planning-card, .tool-card, .trace-card { margin: 0 0 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
.reasoning-card { border-color: color-mix(in srgb, var(--violet) 22%, var(--line)); background: var(--violet-soft); }
.planning-card { border-color: color-mix(in srgb, var(--accent) 24%, var(--line)); background: var(--accent-soft); }
.reasoning-card summary, .planning-card summary, .tool-card summary, .trace-card summary { display: flex; min-height: 40px; align-items: center; gap: 8px; padding: 9px 12px; cursor: pointer; font-size: 12px; font-weight: 680; list-style: none; }
.reasoning-card summary::-webkit-details-marker, .planning-card summary::-webkit-details-marker, .tool-card summary::-webkit-details-marker, .trace-card summary::-webkit-details-marker { display:none; }
.reasoning-card summary::after, .planning-card summary::after, .tool-card summary::after, .trace-card summary::after { content:"⌄"; margin-left:auto; color:var(--text-faint); }
.reasoning-card[open] summary::after, .planning-card[open] summary::after, .tool-card[open] summary::after, .trace-card[open] summary::after { transform:rotate(180deg); }
.reasoning-card summary { color: var(--violet); }
.planning-card summary { color: var(--accent-deep); }
.reasoning-content { max-height: 300px; overflow-y: auto; padding: 0 13px 13px; color: var(--text-soft); font-size: 13px; line-height: 1.65; white-space: pre-wrap; }
.planning-content { max-height: 300px; overflow-y: auto; padding: 0 13px 13px; color: var(--text-soft); font-size: 13px; line-height: 1.65; white-space: pre-wrap; }
.tool-card summary { color: var(--green); }
.tool-content { padding: 0 12px 12px; }
.tool-event { display: grid; grid-template-columns: 1fr auto; gap: 5px 10px; padding: 9px 0; border-top: 1px solid var(--line); }
.tool-event strong { font-family: ui-monospace, monospace; font-size: 12px; }
.tool-status { color: var(--text-faint); font-size: 10px; text-transform: uppercase; }
.tool-event pre { grid-column: 1 / -1; margin: 0; padding: 9px 10px; overflow-x:auto; border-radius:8px; background:var(--surface-soft); color:var(--text-soft); font-size:11px; white-space:pre-wrap; }
.trace-card summary { color:var(--text-soft); }
.trace-content { padding:0 12px 12px; border-top:1px solid var(--line); }
.trace-content pre { max-height:360px; margin:10px 0 0; padding:10px; overflow:auto; border-radius:8px; background:var(--surface-soft); color:var(--text-soft); font-size:10px; line-height:1.5; white-space:pre-wrap; overflow-wrap:anywhere; }
.trace-actions { display:flex; flex-wrap:wrap; gap:6px; padding-top:10px; }
.trace-actions button { padding:6px 9px; border:1px solid var(--line); border-radius:8px; color:var(--text-soft); background:var(--surface); cursor:pointer; font-size:10px; font-weight:650; }
.trace-actions button:hover { border-color:var(--line-strong); color:var(--text); }
.document-list { display:grid; gap:7px; margin:11px 0 4px; padding:9px 10px; border:1px solid var(--line); border-radius:9px; background:var(--surface-soft); }
input[type="file"] { width: 100%; padding: 8px 0; color: var(--text-soft); font-size: 12px; }
.document-list .setting-note { display: block; margin: 0; }
.document-item { display:flex; align-items:center; justify-content:space-between; gap:8px; padding:8px 0; border-bottom:1px solid var(--line); }
.document-item:last-child { border-bottom:0; }
.document-item span { display:flex; min-width:0; flex-direction:column; }
.document-item strong { overflow:hidden; font-size:11px; text-overflow:ellipsis; white-space:nowrap; }
.document-item small { margin-top:3px; color:var(--text-faint); font-size:9px; }
.document-remove { padding:5px 7px; border:1px solid var(--line-strong); border-radius:7px; color:var(--text-soft); background:var(--surface); cursor:pointer; font-size:10px; }
.document-remove:hover { border-color:color-mix(in srgb,var(--accent) 45%,var(--line)); color:var(--accent-deep); }
.phase-label { display:inline-flex; align-items:center; gap:7px; margin-bottom:10px; color:var(--text-faint); font-size:11px; }
.phase-label i { width:6px; height:6px; border-radius:50%; background:var(--accent); animation:pulse 1s infinite; }
.error-message { padding: 12px 14px; border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); border-radius: 12px; color: var(--accent-deep); background: var(--accent-soft); font-size: 13px; line-height: 1.5; }

.composer-zone { position: relative; z-index: 8; padding: 10px 24px max(12px, env(safe-area-inset-bottom)); background: linear-gradient(to bottom, transparent, var(--bg) 15%); }
.composer { width: min(820px, 100%); margin: 0 auto; padding: 9px 10px 8px 16px; border: 1px solid var(--line-strong); border-radius: 18px; background: var(--surface); box-shadow: 0 12px 34px rgba(20,24,21,.10), 0 2px 7px rgba(20,24,21,.05); transition: border-color .15s, box-shadow .15s; }
.composer:focus-within { border-color: rgba(199,43,70,.42); box-shadow: 0 14px 38px rgba(20,24,21,.12), 0 0 0 3px var(--accent-soft); }
.composer textarea { display:block; width:100%; max-height:180px; resize:none; padding:6px 2px 8px; border:0; outline:0; color:var(--text); background:transparent; line-height:1.5; }
.composer textarea::placeholder { color: var(--text-faint); }
.composer-footer { justify-content:space-between; }
.composer-modes { gap:5px; }
.composer-chip { display:flex; min-height:30px; align-items:center; gap:5px; padding:5px 8px; border:1px solid transparent; border-radius:9px; color:var(--text-faint); background:transparent; cursor:pointer; font-size:11px; font-weight:650; }
.composer-chip svg { width:15px; height:15px; }
.composer-chip:hover { color:var(--text); background:var(--surface-soft); }
.composer-chip.active { color:var(--green); border-color:color-mix(in srgb, var(--green) 22%, transparent); background:var(--green-soft); }
#toggle-thinking.active { color:var(--violet); border-color:color-mix(in srgb, var(--violet) 22%, transparent); background:var(--violet-soft); }
#toggle-agentic.active, .mode-chip.active-agentic { color:var(--accent-deep); border-color:color-mix(in srgb, var(--accent) 22%, transparent); background:var(--accent-soft); }
.send-button { display:grid; width:36px; height:36px; padding:0; place-items:center; border:0; border-radius:11px; color:white; background:linear-gradient(145deg, var(--accent), var(--accent-deep)); box-shadow:0 6px 15px rgba(178,24,53,.24); cursor:pointer; }
.send-button:hover { transform:translateY(-1px); }
.send-button:disabled { opacity:.4; cursor:default; transform:none; }
.send-button .stop-icon { display:none; }
.composer-zone.generating .send-button .send-icon { display:none; }
.composer-zone.generating .send-button .stop-icon { display:block; }
.disclaimer { margin:8px auto 0; color:var(--text-faint); font-size:10px; text-align:center; }

.scrim { position:fixed; inset:0; z-index:40; visibility:hidden; background:rgba(12,15,13,.35); opacity:0; backdrop-filter:blur(2px); transition:opacity .2s, visibility .2s; }
.scrim.visible { visibility:visible; opacity:1; }
.settings-drawer { position:fixed; z-index:50; top:0; right:0; display:grid; width:min(var(--drawer-width), 100%); height:100dvh; grid-template-rows:auto auto minmax(0,1fr) auto; border-left:1px solid var(--line); background:var(--panel); box-shadow:var(--shadow-lg); transform:translateX(102%); transition:transform .24s cubic-bezier(.2,.75,.2,1); }
.settings-drawer.open { transform:translateX(0); }
.drawer-header { justify-content:space-between; padding:21px 20px 17px; border-bottom:1px solid var(--line); }
.drawer-header .eyebrow { margin-bottom:5px; }
.drawer-header h2 { margin:0; font-family:ui-serif, Georgia, serif; font-size:24px; font-weight:530; letter-spacing:-.035em; }
.config-tabs { display:grid; grid-template-columns:1.25fr 1.25fr 1fr .7fr; gap:4px; padding:9px 20px; border-bottom:1px solid var(--line); background:var(--panel); }
.config-tabs button { min-height:32px; padding:5px 7px; border:1px solid transparent; border-radius:9px; color:var(--text-faint); background:transparent; cursor:pointer; font-size:11px; font-weight:700; }
.config-tabs button:hover { color:var(--text); background:var(--surface-soft); }
.config-tabs button.active { border-color:var(--line); color:var(--text); background:var(--surface); box-shadow:var(--shadow-sm); }
.drawer-body { min-height:0; overflow-y:auto; padding:18px 22px 32px; scrollbar-width:thin; }
.config-panel { display:none; }
.config-panel.active { display:block; }
.preset-row { display:grid; grid-template-columns:repeat(3,1fr); gap:5px; padding:4px; border-radius:12px; background:var(--surface-soft); }
.preset-row button { padding:7px 5px; border:0; border-radius:9px; color:var(--text-soft); background:transparent; cursor:pointer; font-size:11px; font-weight:650; }
.preset-row button.selected { color:var(--text); background:var(--surface); box-shadow:var(--shadow-sm); }
.setting-section { padding:20px 0; border-bottom:1px solid var(--line); }
.mode-section { padding-top:12px; }
.mode-section .switch-row { margin:0; }
.setting-section:last-child { border-bottom:0; }
.setting-section h3 { margin:0 0 11px; font-size:12px; letter-spacing:.025em; }
.subsection-title { margin:22px 0 10px; font-size:11px; letter-spacing:.02em; }
.setting-note { margin:-1px 0 13px; color:var(--text-faint); font-size:10px; line-height:1.5; }
.model-cards { display:grid; gap:8px; }
.model-card { width:100%; padding:12px 13px; border:1px solid var(--line); border-radius:12px; color:var(--text-soft); background:var(--surface); cursor:pointer; text-align:left; transition:border-color .15s, transform .15s, box-shadow .15s; }
.model-card:hover { border-color:color-mix(in srgb,var(--accent) 40%,var(--line)); transform:translateY(-1px); box-shadow:var(--shadow-sm); }
.model-card.selected { border-color:color-mix(in srgb,var(--accent) 62%,var(--line)); color:var(--text); background:linear-gradient(135deg,var(--surface),var(--accent-soft)); box-shadow:inset 3px 0 0 var(--accent); }
.model-card strong, .model-card small { display:block; }
.model-card strong { font-size:12px; font-weight:730; }
.model-card small { margin-top:4px; color:var(--text-faint); font-size:10px; line-height:1.4; }
.model-cards.compact .model-card { padding:10px 12px; }
.model-card-link { display:inline-block; margin-top:8px; color:var(--accent-deep); font-size:10px; text-decoration:none; }
.model-card-link:hover { text-decoration:underline; }
.visually-hidden { position:absolute !important; width:1px !important; height:1px !important; padding:0 !important; margin:-1px !important; overflow:hidden !important; clip:rect(0,0,0,0) !important; white-space:nowrap !important; border:0 !important; }
.data-actions { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.data-actions + .data-actions { margin-top:12px; }
.data-actions .wide-action { grid-column:1 / -1; }
.endpoint-row { display:flex; align-items:stretch; gap:7px; }
.endpoint-link { display:flex; min-width:0; min-height:38px; flex:1; align-items:center; overflow:hidden; padding:8px 10px; border:1px solid var(--line-strong); border-radius:10px; color:var(--text-soft); background:var(--surface); font-family:ui-monospace, SFMono-Regular, Menlo, monospace; font-size:9px; line-height:1.35; text-decoration:none; overflow-wrap:anywhere; }
.endpoint-link:hover { border-color:rgba(199,43,70,.4); color:var(--text); }
.endpoint-copy { flex:0 0 auto; }
.field-label { justify-content:space-between; margin:12px 0 6px; color:var(--text-soft); font-size:11px; font-weight:620; }
.field-label output { color:var(--text); font-variant-numeric:tabular-nums; }
.setting-section textarea, .setting-section input[type="number"], .setting-section select { width:100%; border:1px solid var(--line-strong); border-radius:10px; outline:0; color:var(--text); background:var(--surface); }
.setting-section textarea { resize:vertical; min-height:92px; padding:10px 11px; font-size:12px; line-height:1.5; }
.setting-section textarea:focus, .setting-section input[type="number"]:focus, .setting-section select:focus { border-color:rgba(199,43,70,.4); box-shadow:0 0 0 3px var(--accent-soft); }
input[type="range"] { width:100%; accent-color:var(--accent); }
.switch-row { display:flex; align-items:center; justify-content:space-between; gap:18px; margin:7px 0; padding:11px 12px; border:1px solid var(--line); border-radius:12px; background:var(--surface); cursor:pointer; }
.switch-row span { display:flex; min-width:0; flex-direction:column; }
.switch-row strong { font-size:12px; }
.switch-row small { margin-top:3px; color:var(--text-faint); font-size:10px; line-height:1.4; }
.switch-row input, .mini-switch input { position:absolute; opacity:0; pointer-events:none; }
.switch-row > i, .mini-switch i { position:relative; flex:0 0 auto; width:34px; height:20px; border-radius:999px; background:var(--surface-hover); box-shadow:inset 0 0 0 1px var(--line-strong); transition:.15s; }
.switch-row > i::after, .mini-switch i::after { content:""; position:absolute; top:3px; left:3px; width:14px; height:14px; border-radius:50%; background:var(--surface); box-shadow:0 1px 3px rgba(0,0,0,.2); transition:.15s; }
.switch-row input:checked + i, .mini-switch input:checked + i { background:var(--accent); box-shadow:none; }
.switch-row input:checked + i::after, .mini-switch input:checked + i::after { transform:translateX(14px); background:white; }
.tool-options { padding:7px 0 0; }
.tool-options.disabled { opacity:.4; pointer-events:none; }
.agentic-options { padding-top:7px; }
.agentic-options.disabled { opacity:.4; pointer-events:none; }
.embedding-device-options { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.embedding-device-options + .two-column { margin-top:16px; }
.embedding-device-card { display:flex; align-items:flex-start; gap:8px; min-height:62px; padding:11px; border:1px solid var(--line); border-radius:11px; background:var(--surface); cursor:pointer; transition:.15s; }
.embedding-device-card:has(input:checked) { border-color:rgba(199,43,70,.55); background:var(--accent-soft); box-shadow:0 0 0 1px rgba(199,43,70,.12); }
.embedding-device-card:has(input:disabled) { opacity:.45; cursor:not-allowed; }
.embedding-device-card input { margin:2px 0 0; accent-color:var(--accent); }
.embedding-device-card span { display:flex; flex-direction:column; min-width:0; }
.embedding-device-card strong { font-size:12px; }
.embedding-device-card small { margin-top:3px; color:var(--text-faint); font-size:10px; line-height:1.35; }
.index-progress { display:grid; gap:7px; margin-top:10px; padding:10px 11px; border:1px solid var(--line); border-radius:10px; color:var(--text-soft); background:var(--surface-soft); font-size:11px; }
.index-progress progress { width:100%; height:5px; accent-color:var(--accent); }
.autosave-note { align-self:center; color:var(--text-faint); font-size:11px; }
.tool-descriptions { margin-top:14px; border:1px solid var(--line); border-radius:10px; background:var(--surface-soft); overflow:hidden; }
.tool-descriptions summary { padding:10px 11px; color:var(--text-soft); cursor:pointer; font-size:11px; font-weight:650; }
.tool-descriptions[open] summary { border-bottom:1px solid var(--line); }
.tool-descriptions .field-label, .tool-descriptions textarea { width:calc(100% - 20px); margin-left:10px; margin-right:10px; }
.tool-descriptions textarea { min-height:58px; margin-bottom:10px; }
.check-row { display:flex; align-items:center; gap:9px; padding:7px 4px; cursor:pointer; }
.check-row input { accent-color:var(--accent); }
.check-row span { display:flex; flex-direction:column; }
.check-row strong { font-size:11px; }
.check-row small { margin-top:2px; color:var(--text-faint); font-size:10px; }
.two-column { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.setting-section > .field-label + .model-cards { margin-top:8px; }
.two-column label, .seed-row > label:first-child { display:flex; min-width:0; flex-direction:column; gap:6px; color:var(--text-soft); font-size:10px; font-weight:620; }
.two-column input, .two-column select, .seed-row input[type="number"] { height:36px; padding:6px 9px; font-size:12px; }
.seed-row { justify-content:space-between; gap:15px; margin-top:14px; }
.seed-row > label:first-child { flex:1; }
.mini-switch { display:flex; align-items:center; gap:7px; padding-top:16px; color:var(--text-soft); cursor:pointer; font-size:10px; font-weight:620; }
.mini-switch i { width:30px; height:18px; }
.mini-switch i::after { width:12px; height:12px; }
.mini-switch input:checked + i::after { transform:translateX(12px); }
.drawer-footer { justify-content:flex-end; gap:8px; padding:13px 20px max(13px,env(safe-area-inset-bottom)); border-top:1px solid var(--line); background:var(--panel); }
.secondary-button, .primary-button { min-height:38px; padding:8px 14px; border-radius:10px; cursor:pointer; font-size:12px; font-weight:680; }
.setting-section > .wide-action { width:100%; margin-top:4px; }
.secondary-button { border:1px solid var(--line-strong); background:var(--surface); }
.primary-button { border:1px solid transparent; color:white; background:linear-gradient(145deg,var(--accent),var(--accent-deep)); }

.toast-region { position:fixed; z-index:80; right:18px; bottom:18px; display:flex; width:min(340px,calc(100% - 36px)); flex-direction:column; gap:8px; }
.toast { padding:11px 13px; border:1px solid var(--line-strong); border-radius:11px; background:var(--surface); box-shadow:var(--shadow-lg); font-size:12px; line-height:1.4; animation:toast-in .2s ease-out; }
.toast.error { color:var(--accent-deep); border-color:color-mix(in srgb,var(--accent) 35%,var(--line)); background:var(--accent-soft); }
@keyframes toast-in { from { opacity:0; transform:translateY(8px) } }

.mobile-only { display:none; }

@media (max-width: 820px) {
  .app-shell { grid-template-columns:1fr; }
  .history-panel { position:fixed; z-index:50; inset:0 auto 0 0; width:min(var(--history-width),88vw); transform:translateX(-102%); transition:transform .22s ease; box-shadow:var(--shadow-lg); }
  .history-panel.open { transform:translateX(0); }
  .mobile-only { display:grid; }
  .topbar { padding:0 13px; }
  .conversation-title { margin-right:auto; margin-left:9px; }
  .conversation-title span, .mode-chip { display:none; }
  .settings-button span { display:none; }
  .settings-button { width:36px; padding:0; justify-content:center; }
  .welcome { width:min(620px,calc(100% - 28px)); padding-top:55px; }
  .message-list { width:calc(100% - 28px); padding-top:24px; }
  .composer-zone { padding-inline:12px; }
}

@media (max-width: 560px) {
  .suggestions { grid-template-columns:1fr; }
  .suggestions button:nth-child(n+4) { display:none; }
  .welcome-copy { font-size:14px; }
  .message { grid-template-columns:28px minmax(0,1fr); gap:10px; }
  .message-avatar { width:28px; height:28px; border-radius:9px; font-size:10px; }
  .message-content { font-size:14.5px; }
  .disclaimer { display:none; }
  .composer-zone { padding-bottom:max(9px,env(safe-area-inset-bottom)); }
  .settings-drawer { width:100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior:auto !important; animation-duration:.01ms !important; transition-duration:.01ms !important; }
}