/* ============================================================
   Marbel AI — tata letak ala Claude AI
   Sidebar kiri + kolom chat tengah + composer minimal
   ============================================================*/
:root {
  --bg:#fbfbfa;
  --bg-soft:#f2f2f0;
  --line:#e6e6e2;
  --text:#2b2438;
  --muted:#8b8199;
  --accent:#6c5ce7;
  --accent-2:#00b8a9;
  --accent-ink:#ffffff;
  --mine:#f1edff;
  --ok:#00b8a9;
  --err:#e5533d;
  --code:#0b6b5c;
  --code-bg:#eef7f0;
  --panel:#ffffff;
  --card:#ffffff;
  --chip:#ffffff;
  --choice:#ffffff;
  --composer:#ffffff;
  --shadow:rgba(40,30,80,.08);
  --font-body:"Plus Jakarta Sans","Inter","Segoe UI",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --mono:var(--font-mono);
}

/* ================== Mode malam ================== */
html[data-theme="dark"] {
  --bg:#12121c;
  --bg-soft:#191924;
  --line:#2c2c3e;
  --text:#eceaf4;
  --muted:#9a92ad;
  --accent:#8b7cee;
  --accent-2:#2dd4c4;
  --accent-ink:#ffffff;
  --mine:#232332;
  --ok:#2dd4c4;
  --err:#ff6b56;
  --code:#4fe0c8;
  --code-bg:#16211f;
  --panel:#1c1c29;
  --card:#1c1c29;
  --chip:#1c1c29;
  --choice:#1c1c29;
  --composer:#1c1c29;
  --shadow:rgba(0,0,0,.35);
}

* { box-sizing:border-box; margin:0; padding:0; }
html,body { height:100%; }

body {
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}

/* latar halus */
.bg-scene { position:fixed; inset:0; z-index:0; overflow:hidden; pointer-events:none; }
.aurora { position:absolute; border-radius:50%; filter:blur(90px); opacity:.28; }
.a1 { width:440px; height:440px; background:color-mix(in srgb,var(--accent) 24%,white); top:-160px; left:-120px; }
.a2 { width:460px; height:460px; background:color-mix(in srgb,var(--accent-2) 20%,white); top:-100px; right:-160px; }
.a3 { width:520px; height:520px; background:color-mix(in srgb,var(--accent) 12%,white); bottom:-280px; left:30%; }

/* ================== Layout ================== */
.layout {
  display:flex; flex-direction:row;
  height:100vh;
  position:relative; z-index:1;
  background:transparent;
}

/* ================== Sidebar ================== */
.sidebar {
  width:272px;
  flex:0 0 auto;
  display:flex; flex-direction:column;
  background:var(--bg-soft);
  border-right:1px solid var(--line);
  padding:16px 12px;
  min-height:0;
  position:relative; z-index:4;
}
.layout.collapsed .sidebar { display:none; }

.sidebar-head { display:flex; align-items:center; gap:11px; padding:2px 6px 16px; }
.theme-toggle {
  margin-left:auto;
  width:34px; height:34px; border-radius:9px;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--muted);
  cursor:pointer;
  display:inline-flex; align-items:center; justify-content:center;
  flex:0 0 auto;
  transition:color .13s ease,border-color .13s ease,background .13s ease;
}
.theme-toggle:hover { color:var(--accent); border-color:var(--accent); }
.theme-toggle .icon-moon { display:none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display:none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display:inline-flex; }
.theme-toggle svg { flex:0 0 auto; }
.panel-hide {
  width:34px; height:34px; border-radius:9px;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--muted);
  cursor:pointer;
  display:inline-flex; align-items:center; justify-content:center;
  transition:color .13s ease,border-color .13s ease,background .13s ease;
  flex:0 0 auto;
}
.panel-hide:hover { color:var(--accent); border-color:var(--accent); }
.panel-hide svg { flex:0 0 auto; }
.brand-mark {
  width:38px; height:38px; border-radius:11px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:var(--accent-ink);
  display:grid; place-items:center;
  flex:0 0 auto;
}
.brand-ico { animation:brandTwinkle 3.2s ease-in-out infinite; transform-origin:center; }
.brand-ico circle:last-of-type { animation:brandBlink 3.2s ease-in-out infinite; transform-origin:center; }
@keyframes brandTwinkle {
  0%,100% { transform:scale(1) rotate(0deg); }
  50% { transform:scale(1.1) rotate(10deg); }
}
@keyframes brandBlink { 0%,100% { opacity:1; } 50% { opacity:.45; } }
.brand-text { display:flex; flex-direction:column; gap:2px; min-width:0; flex:1 1 auto; }
.brand-name { font-weight:800; font-size:17px; letter-spacing:-.01em; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.brand-high { color:var(--accent); margin-left:1px; }
.brand-tag { font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; font-weight:700; color:var(--muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }

.new-thread {
  display:flex; align-items:center; justify-content:center; gap:8px;
  background:transparent;
  color:var(--text);
  border:1px solid var(--line);
  border-radius:10px;
  padding:11px 12px;
  font-size:13.5px;
  font-weight:600;
  font-family:inherit;
  cursor:pointer;
  width:100%;
  transition:border-color .15s ease,background .15s ease,color .15s ease;
}
.new-thread:hover { border-color:var(--accent); color:var(--accent); background:var(--mine); }
.new-thread svg { flex:0 0 auto; }

.conv-bar {
  display:flex; flex-direction:column; gap:8px;
  margin-top:18px;
  flex:1 1 auto;
  min-height:0;
}
.conv-label { font-size:11.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); font-weight:800; padding:0 6px; }
.thread-list {
  list-style:none;
  display:flex; flex-direction:column; gap:2px;
  overflow-y:auto;
  padding:2px;
  scrollbar-width:thin;
  min-height:0;
}
.thread-item {
  padding:10px 12px;
  border-radius:8px;
  font-size:13.5px;
  color:var(--text);
  cursor:pointer;
  display:flex; align-items:center; gap:8px;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  max-width:100%;
  transition:background .13s ease;
}
.thread-item:hover { background:color-mix(in srgb,var(--line) 55%,transparent); }
.thread-item.active { background:var(--mine); }
.thread-item.active .tname { color:var(--accent); font-weight:700; }
.thread-item .tid { font-size:11.5px; color:var(--muted); flex:0 0 auto; font-family:var(--mono); }
.thread-item .tname { overflow:hidden; text-overflow:ellipsis; }

.sidebar-foot {
  flex:0 0 auto;
  padding:12px 6px 2px;
  font-size:11.5px; color:var(--muted); font-weight:700;
  letter-spacing:.07em; text-transform:uppercase;
  border-top:1px solid var(--line);
  margin-top:12px;
}

/* ================== Main ================== */
.main { flex:1; display:flex; flex-direction:column; min-width:0; min-height:0; position:relative; z-index:1; }

/* topbar minimal */
.topbar {
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:12px clamp(16px,4%,36px);
  flex:0 0 auto;
  position:relative; z-index:3;
}
.topbar-left { display:flex; align-items:center; gap:10px; min-width:0; }
.header-pill {
  display:inline-flex; align-items:center; gap:8px;
  font-size:12.5px; font-weight:600; color:var(--muted);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:999px;
  padding:7px 14px;
}
.hp-dot { width:7px; height:7px; border-radius:50%; background:var(--ok); }

.topbar-right { display:flex; align-items:center; gap:10px; flex:0 0 auto; }
.status-row { display:flex; align-items:center; gap:8px; min-width:0; }
#statusLabel { font-size:13px; color:var(--muted); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; max-width:170px; }
.dot { width:8px; height:8px; border-radius:50%; background:var(--muted); flex:0 0 auto; }
.dot.on { background:var(--ok); }
.dot.err { background:var(--err); }
.status-icon { display:none !important; align-items:center; justify-content:center; flex:0 0 auto;
  width:26px; height:26px; border-radius:50%;
  color:var(--muted);
  position:relative;
}
.status-icon::before {
  content:""; position:absolute; inset:0; border-radius:50%;
  background:color-mix(in srgb,currentColor 12%,transparent);
}
.status-icon.on { color:var(--ok); }
.status-icon.err { color:var(--err); }
.status-icon.show { display:inline-flex; }

.status-icon svg, .status-icon .live-dot, .status-icon .ping-ring { position:relative; flex:0 0 auto; }
.status-icon .live-dot, .status-icon .ping-ring { display:none; }
.status-icon.on .live-dot { display:block; }
.status-icon.on .ping-ring { display:block; }
.status-icon.err .live-dot { display:block; }
.status-icon.err .ping-ring { display:block; }
.status-icon:not(.on):not(.err) .icon-spinner { display:block; }
.status-icon.on .icon-spinner, .status-icon.err .icon-spinner { display:none; }

/* dot hidup + gelombang radar saat terhubung */
.status-icon .live-dot {
  width:10px; height:10px; border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 55%,transparent);
  animation:dotGlow 2s ease-out infinite;
}
.status-icon .ping-ring {
  position:absolute; left:50%; top:50%;
  width:10px; height:10px; margin:-5px 0 0 -5px;
  border-radius:50%;
  border:1.5px solid var(--ok);
  animation:ping 2s cubic-bezier(0,0,.2,1) infinite;
}
.status-icon .ping-ring.two { animation-delay:1s; }

@keyframes ping {
  0% { transform:scale(1); opacity:.9; }
  80%,100% { transform:scale(2.6); opacity:0; }
}
@keyframes dotGlow {
  0% { box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 55%,transparent); }
  70% { box-shadow:0 0 0 7px color-mix(in srgb,var(--ok) 0%,transparent); }
  100% { box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 0%,transparent); }
}

/* dot merah bergetar + kedip saat gagal */
.status-icon.err .live-dot {
  background:var(--err);
  box-shadow:0 0 0 0 color-mix(in srgb,var(--err) 55%,transparent);
  animation:errShake 0.45s ease-in-out infinite,errGlow 1.4s ease-in-out infinite;
}
.status-icon.err .ping-ring { border-color:var(--err); animation:none; opacity:.45; }

@keyframes errShake {
  0%,100% { transform:translateX(0); }
  20% { transform:translateX(-2px); }
  40% { transform:translateX(2px); }
  60% { transform:translateX(-1px); }
  80% { transform:translateX(1px); }
}
@keyframes errGlow {
  0%,100% { box-shadow:0 0 0 0 color-mix(in srgb,var(--err) 55%,transparent); }
  50% { box-shadow:0 0 0 6px color-mix(in srgb,var(--err) 0%,transparent); }
}

.status-icon:not(.on):not(.err) .icon-spinner { animation:statusSpin 1.1s linear infinite; }

@keyframes statusSpin { to { transform:rotate(360deg); } }

.side-btn {
  background:var(--panel); border:1px solid var(--line); color:var(--muted);
  width:34px; height:34px; border-radius:8px; cursor:pointer; font-size:15px;
  display:inline-flex; align-items:center; justify-content:center;
  transition:color .13s ease,border-color .13s ease;
}
.side-btn:hover { color:var(--accent); border-color:var(--accent); }

/* ================== Workspace ================== */
.workspace { flex:1; min-height:0; display:flex; flex-direction:row; align-items:stretch; min-width:0; }
.thread-wrap { flex:1; display:flex; flex-direction:column; min-height:0; min-width:0; position:relative; }

/* ================== Welcome ================== */
.welcome { flex:1; display:flex; align-items:center; justify-content:center; padding:10px 24px 20px; overflow-y:auto; }
.welcome-inner {
  max-width:640px; width:100%; text-align:center;
  padding:56px 10px 8px;
}
.eyebrow {
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 16px; margin-bottom:16px;
  border-radius:999px;
  background:var(--mine);
  color:var(--accent);
  font-size:12px; font-weight:800; letter-spacing:.12em; text-transform:uppercase;
}
.welcome h2 { font-weight:800; font-size:clamp(28px,4.4vw,40px); letter-spacing:-.02em; margin-bottom:12px; line-height:1.12; }
.welcome h2 .grad {
  background:linear-gradient(92deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.welcome-sub { display:none; }

.slider { display:none; }
.model-section { display:none; }
.track { display:flex; flex-wrap:wrap; justify-content:center; gap:10px; width:100%; }
.track button {
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:12px;
  padding:11px 18px;
  color:var(--text);
  font-family:inherit;
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  display:inline-flex; align-items:center; gap:10px;
  white-space:nowrap;
  flex:0 0 auto;
  box-shadow:0 1px 6px var(--shadow);
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;
}
.track button:hover { transform:translateY(-1px); border-color:var(--accent); box-shadow:0 6px 18px var(--shadow); }
.track .sc { font-size:16px; flex:0 0 auto; }

/* ================== model list ================== */
.model-section { margin-top:26px; text-align:left; }
.ms-head { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px; }
.ms-title { font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); font-weight:800; }
.ms-count { font-size:13px; color:var(--muted); }

.model-list { display:flex; flex-wrap:wrap; gap:8px; max-height:160px; overflow-y:auto; }
.mname {
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--muted);
  border-radius:999px;
  padding:8px 14px;
  font-size:12.5px;
  font-family:var(--mono);
  cursor:pointer;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:200px;
  transition:all .15s ease;
}
.mname:hover { border-color:var(--accent); color:var(--accent); transform:translateY(-1px); }
.mname.active { border-color:var(--accent); color:var(--accent); background:var(--mine); font-weight:700; }
.mname.locked { opacity:.55; }

/* ================== messages (kolom tengah, ala Claude) ================== */
.messages {
  flex:1; min-height:0;
  overflow-y:auto;
  padding:14px clamp(16px,5%,72px) 20px;
  display:flex; flex-direction:column; gap:24px;
}
.messages:empty { flex:0 0 auto; padding:0; min-height:0; }
.msg { max-width:92%; line-height:1.75; font-size:15.5px; animation:rise .32s ease both; }

.msg.user {
  align-self:flex-end;
  background:var(--accent);
  color:var(--accent-ink);
  border-radius:18px 18px 6px 18px;
  padding:12px 17px;
  max-width:72%;
  white-space:pre-wrap; word-break:break-word;
  box-shadow:0 2px 10px var(--shadow);
}
.msg.user .ubody { white-space:pre-wrap; word-break:break-word; }

.msg.assistant {
  align-self:flex-start; width:100%;
  background:transparent;
  border:none;
  border-radius:0;
  padding:2px 0;
}
.msg.assistant.err { color:var(--err); }

.msg .role-tag { display:flex; align-items:center; gap:9px; font-size:13.5px; color:var(--muted); margin-bottom:10px; font-weight:700; letter-spacing:.02em; }
.role-tag .agent-dot {
  width:26px; height:26px; border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:var(--accent-ink);
  display:grid; place-items:center;
  font-size:12px;
}

.msg .body { color:var(--text); display:flex; flex-direction:column; gap:10px; font-size:15.5px; line-height:1.75; }
.msg .inner { width:100%; max-width:100%; }

.msg code { font-family:var(--mono); font-size:.94em; background:var(--code-bg); color:var(--code); padding:3px 8px; border-radius:6px; }
.msg pre {
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:12px;
  padding:14px 16px;
  overflow-x:auto;
  font-family:var(--mono);
  font-size:14px;
  line-height:1.6;
  white-space:pre-wrap; word-break:break-word;
  box-shadow:0 1px 8px var(--shadow);
}

.token { display:inline-flex; align-items:center; gap:6px; margin-top:10px; font-size:13px; color:var(--muted); }

/* ================== aksi pesan ================== */
.m-actions { display:flex; gap:6px; margin-top:12px; }
.m-act {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--muted);
  border-radius:999px;
  padding:6px 15px;
  font-size:13px;
  font-family:inherit;
  font-weight:600;
  cursor:pointer;
  transition:all .14s ease;
}
.m-act:hover { color:var(--accent); border-color:var(--accent); }
.m-act.ok { color:var(--accent); border-color:var(--accent); background:var(--mine); }

.model-tag { color:var(--accent); font-weight:700; font-family:var(--mono); font-size:12.5px; }

/* typing indicator */
.typing { display:inline-flex; gap:5px; align-items:center; }
.typing span { width:7px; height:7px; border-radius:50%; background:var(--accent); animation:blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay:.2s; }
.typing span:nth-child(3) { animation-delay:.4s; }
@keyframes blink { 0%,80%,100% { opacity:.25; transform:translateY(0); } 40% { opacity:1; transform:translateY(-3px); } }
@keyframes rise { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:none; } }

.active-badge {
  position:absolute; bottom:14px; left:50%; transform:translateX(-50%);
  display:none;
  align-items:center; justify-content:center; gap:9px;
  padding:9px 20px;
  font-size:13px; color:var(--muted); font-weight:600;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 8px 26px var(--shadow);
  z-index:6;
  white-space:nowrap;
}
.active-badge.show { display:flex; animation:rise .3s ease both; }
.spark-ico {
  width:26px; height:26px; border-radius:50%;
  display:grid; place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:var(--accent-ink);
  box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 45%,transparent);
  animation:sparkPulse 1.6s ease-out infinite;
}
@keyframes sparkPulse {
  0% { box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 45%,transparent); transform:scale(1); }
  50% { transform:scale(1.1) rotate(18deg); }
  70% { box-shadow:0 0 0 9px transparent; }
  100% { box-shadow:0 0 0 0 transparent; transform:scale(1); }
}
.active-badge .typing { display:inline-flex; gap:4px; }
.active-badge .typing span { width:6px; height:6px; border-radius:50%; background:var(--accent); animation:blink 1.2s infinite; }
.active-badge .typing span:nth-child(2) { animation-delay:.2s; }
.active-badge .typing span:nth-child(3) { animation-delay:.4s; }

/* ================== Composer (ala Claude, di tengah bawah) ================== */
.composer {
  margin:6px auto 16px;
  width:min(780px,calc(100% - 32px));
  background:var(--composer);
  border:1px solid var(--line);
  border-radius:16px;
  display:flex; flex-direction:column;
  padding:12px 14px;
  flex:0 0 auto;
  box-shadow:0 2px 18px var(--shadow);
  transition:border-color .2s ease,box-shadow .2s ease;

}
.composer:focus-within { border-color:var(--accent); box-shadow:0 2px 22px var(--shadow); }

.composer textarea {
  width:100%;
  background:transparent;
  border:none; outline:none; resize:none;
  color:var(--text);
  font-family:inherit;
  font-size:16px;
  line-height:1.6;
  min-height:48px;
  max-height:200px;
}
.composer textarea::placeholder { color:var(--muted); }

.composer-footer { display:flex; align-items:flex-end; justify-content:space-between; gap:10px; margin-top:8px; }
.cf-left { display:flex; align-items:center; }
.custom-select { display:flex; align-items:center; gap:9px; }
.cs-label { font-size:12px; color:var(--muted); font-weight:700; letter-spacing:.05em; text-transform:uppercase; }

.custom-select select {
  background:var(--panel);
  color:var(--text);
  border:1px solid var(--line);
  border-radius:999px;
  padding:8px 13px;
  font-size:13px;
  font-family:var(--mono);
  cursor:pointer;
  max-width:210px;
  transition:border-color .15s ease;
}
.custom-select select:hover { border-color:var(--accent); }
.custom-select select:focus { outline:none; border-color:var(--accent); }

.send {
  display:grid; place-items:center;
  width:42px; height:42px; border-radius:12px;
  background:var(--accent);
  color:var(--accent-ink);
  border:none; cursor:pointer;
  transition:transform .14s ease,background .14s ease,border-radius .14s ease

}
.send:hover { transform:translateY(-1px); background:color-mix(in srgb,var(--accent) 85%,black); border-radius:14px; }
.send:active { transform:translateY(0) scale(.95); }
.send:disabled { opacity:.45; cursor:not-allowed; transform:none; }

/* ================== responsive ================== */
@media (max-width:768px) {
  html,body { overflow:hidden; }
  body { overflow-x:hidden; }

  .sidebar {
    position:fixed; top:0; left:0; bottom:0;
    width:min(280px,82vw);
    transform:translateX(-102%); transition:transform .22s ease;

    z-index:20;
    box-shadow:0 0 40px var(--shadow);
  }
  .layout.collapsed .sidebar { display:flex; transform:translateX(0); }

  .topbar { padding:10px 12px; gap:8px; }
  .header-pill { display:none; }
  #statusLabel { display:none; }
  .side-btn { width:32px; height:32px; }

  .welcome { flex:1 1 100%; align-items:stretch; padding:12px 12px; overflow-y:auto; overflow-x:hidden; -webkit-overflow-scrolling:touch; }
  .welcome-inner { padding:44px 4px 6px; max-width:100%; }
  .welcome h2 { font-size:clamp(24px,6.4vw,32px); }
  .welcome-sub { font-size:13.5px; margin-bottom:18px; }
  .model-list { max-height:130px; }

  .slider { max-width:100%; }
  .track button { padding:10px 15px; font-size:12.5px; }

  .messages { flex:1 1 100%; padding:12px 14px 10px; -webkit-overflow-scrolling:touch; }
  .messages:empty { flex:0 0 auto; padding:0; min-height:0; }
  .msg { max-width:100%; }
  .msg.user { max-width:88%; }

  .composer { margin:6px 10px max(12px, env(safe-area-inset-bottom)); width:auto; border-radius:14px; padding:10px; }
  .composer-footer { gap:8px; }
  .cs-label { display:none; }
  .custom-select select { max-width:140px; padding:7px 9px; font-size:11.5px; }
  .send { width:38px; height:38px; border-radius:10px; }
}

:root {
  --background: var(--bg);
  --base-secondary: var(--panel);
  --base-tertiary: color-mix(in srgb, var(--line) 40%, var(--panel));
  --border: var(--line);
  --content: var(--text);
  --content-2: var(--muted);
  --content-3: color-mix(in srgb, var(--muted) 60%, transparent);
  --primary: var(--accent);
  --primary-2: var(--accent-2);
  --primary-dim: color-mix(in srgb, var(--accent) 12%, transparent);
  --primary-glow: color-mix(in srgb, var(--accent) 20%, transparent);
  --accent-glow: var(--primary-glow);
  --error-bg: color-mix(in srgb, var(--err) 10%, var(--panel));
  --error-border: var(--err);
  --error-text: var(--err);
  --font-ui: var(--font-body);
  --font-mono: var(--font-body);
  --radius: 14px;
}

/* ===== sidebar ===== */
#sidebar{width:272px;flex:0 0 auto;display:flex;flex-direction:column;background:var(--bg-soft);border-right:1px solid var(--line);padding:16px 12px;min-height:0;position:relative;z-index:4;transition:margin-left .25s cubic-bezier(.4,0,.2,1);}
#sidebar.hidden{margin-left:-272px;}
#sidebar .sb-head{display:flex;align-items:center;gap:11px;padding:2px 6px 16px;}
#sidebar .logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:var(--accent-ink);display:grid;place-items:center;flex:0 0 auto;overflow:hidden;box-shadow:0 2px 10px var(--primary-glow);}
#sidebar .logo-mark img{width:100%;height:100%;object-fit:cover;display:block;}
#sidebar .sb-head>div:nth-child(2){display:flex;flex-direction:column;gap:2px;min-width:0;flex:1 1 auto;}
#sidebar .name{font-weight:800;font-size:16.5px;letter-spacing:-.01em;color:var(--text);}
#sidebar .tag{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--muted);}
#sidebar .sb-new{display:flex;align-items:center;justify-content:center;gap:8px;background:transparent;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:13.5px;font-weight:600;font-family:inherit;cursor:pointer;width:100%;margin:4px 0 0;transition:border-color .15s ease,background .15s ease,color .15s ease;}
#sidebar .sb-new:hover{border-color:var(--accent);color:var(--accent);background:var(--mine);}
#sidebar .sb-label{padding:4px 6px 8px;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:800;display:flex;align-items:center;justify-content:space-between;}
#sidebar .sb-label button{background:none;border:none;color:var(--muted);cursor:pointer;font-size:11px;padding:2px;}
#sidebar .sb-label button:hover{color:var(--err);}
#convo-list{list-style:none;display:flex;flex-direction:column;gap:2px;overflow-y:auto;padding:2px;scrollbar-width:thin;flex:1;min-height:0;margin-top:14px;}
#convo-list .convo{padding:10px 12px;border-radius:8px;font-size:13.5px;color:var(--text);cursor:pointer;display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;transition:background .13s ease;}
#convo-list .convo:hover{background:color-mix(in srgb,var(--line) 55%,transparent);}
#convo-list .convo.active{background:var(--mine);}
#convo-list .convo.active .t{color:var(--accent);font-weight:700;}
#convo-list .convo .t{flex:1;overflow:hidden;text-overflow:ellipsis;}
#convo-list .convo .d,#convo-list .convo .r{background:none;border:none;color:var(--muted);cursor:pointer;visibility:hidden;font-size:11.5px;padding:2px;transition:color .13s;font-family:var(--font-body);}
#convo-list .convo .d{color:var(--err);}
#convo-list .convo:hover .d,#convo-list .convo:hover .r{visibility:visible;}
#sidebar .sb-foot{flex:0 0 auto;padding:12px 6px 2px;font-size:11.5px;color:var(--muted);font-weight:700;letter-spacing:.07em;text-transform:uppercase;border-top:1px solid var(--line);margin-top:12px;display:flex;gap:4px;align-items:center;}
#sidebar .sb-foot .icon-btn{background:none;border:none;color:var(--muted);font-size:15px;cursor:pointer;padding:4px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;transition:color .13s,background .13s;}
#sidebar .sb-foot .icon-btn:hover{color:var(--accent);background:var(--mine);}
#sidebar .sb-foot .icon-btn svg{width:17px;height:17px;display:block;}
/* ===== main, topbar, home, welcome ===== */
#main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;position:relative;z-index:1;}
#topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px clamp(16px,4%,36px);flex:0 0 auto;position:relative;z-index:3;}
#topbar .icon-btn{background:none;border:none;color:var(--muted);cursor:pointer;padding:6px 8px;border-radius:8px;transition:background .12s,color .12s;font-family:var(--font-body);display:inline-flex;align-items:center;justify-content:center;}
#topbar .icon-btn:hover{background:var(--mine);color:var(--accent);}
#topbar .icon-btn svg{width:17px;height:17px;display:block;}
#topbar-title{font-size:13.5px;font-weight:600;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0;max-width:280px;}
.spacer{flex:1;}
#user-chip{font-size:12px;color:var(--accent);background:var(--mine);border-radius:20px;padding:5px 12px;display:none;font-weight:600;}
#user-chip.show{display:inline-flex;align-items:center;gap:6px;}
#user-chip svg{width:13px;height:13px;display:block;}
.header-pill{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:7px 14px;white-space:nowrap;}
.hp-dot{width:7px;height:7px;border-radius:50%;background:var(--ok);}
.status-row{display:flex;align-items:center;gap:8px;min-width:0;}
#statusLabel{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:170px;}
.dot{width:8px;height:8px;border-radius:50%;background:var(--muted);flex:0 0 auto;}
.dot.on{background:var(--ok);}
.dot.err{background:var(--err);}
.status-icon{display:none !important;align-items:center;justify-content:center;flex:0 0 auto;width:26px;height:26px;border-radius:50%;color:var(--muted);position:relative;}
.status-icon::before{content:"";position:absolute;inset:0;border-radius:50%;background:color-mix(in srgb,currentColor 12%,transparent);}
.status-icon.on{color:var(--ok);}
.status-icon.err{color:var(--err);}
.status-icon.show{display:inline-flex;}
.status-icon svg,.status-icon .live-dot,.status-icon .ping-ring{position:relative;flex:0 0 auto;}
.status-icon .live-dot,.status-icon .ping-ring{display:none;}
.status-icon.on .live-dot,.status-icon.on .ping-ring,.status-icon.err .live-dot,.status-icon.err .ping-ring{display:block;}
.status-icon:not(.on):not(.err) .icon-spinner{display:block;}
.status-icon.on .icon-spinner,.status-icon.err .icon-spinner{display:none;}
.status-icon .live-dot{width:10px;height:10px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 55%,transparent);animation:dotGlow 2s ease-out infinite;}
.status-icon .ping-ring{position:absolute;left:50%;top:50%;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;border:1.5px solid var(--ok);animation:ping 2s cubic-bezier(0,0,.2,1) infinite;}
.status-icon .ping-ring.two{animation-delay:1s;}
.status-icon.err .live-dot{background:var(--err);box-shadow:0 0 0 0 color-mix(in srgb,var(--err) 55%,transparent);animation:errShake .45s ease-in-out infinite,errGlow 1.4s ease-in-out infinite;}
.status-icon.err .ping-ring{border-color:var(--err);animation:none;opacity:.45;}
.status-icon:not(.on):not(.err) .icon-spinner{animation:statusSpin 1.1s linear infinite;}
.side-btn{background:var(--panel);border:1px solid var(--line);color:var(--muted);width:34px;height:34px;border-radius:8px;cursor:pointer;font-size:15px;display:inline-flex;align-items:center;justify-content:center;transition:color .13s ease,border-color .13s ease;}
.side-btn:hover{color:var(--accent);border-color:var(--accent);}
.menu-btn{display:none;}
.model-chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;color:var(--muted);background:var(--base-tertiary);border-radius:12px;padding:4px 10px;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border:1px solid var(--line);}
.model-chip svg{width:13px;height:13px;display:block;}

#home{flex:1 1 auto;display:flex;align-items:center;justify-content:center;padding:10px 24px 20px;overflow-y:auto;position:relative;}
.welcome-inner{max-width:640px;width:100%;text-align:center;padding:20px 10px 8px;}
.orb{position:absolute;top:50%;width:min(560px,80vw);height:min(560px,80vw);background:radial-gradient(circle,var(--primary-glow),transparent 58%);filter:blur(40px);animation:orbfade 14s ease-in-out infinite alternate;pointer-events:none;}
@keyframes orbfade{from{transform:translateY(-70%) scale(.9) rotate(0deg);}to{transform:translateY(-50%) scale(1.1) rotate(360deg);}}
.home-logo{display:none;}
#home h2{font-weight:800;font-size:clamp(28px,4.4vw,40px);letter-spacing:-.02em;margin-bottom:12px;line-height:1.12;text-align:center;position:relative;z-index:1;}
#home h2 .grad{background:linear-gradient(92deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}
#home p.sub{color:var(--muted);font-size:14.5px;margin-bottom:28px;text-align:center;max-width:560px;line-height:1.65;position:relative;z-index:1;margin-left:auto;margin-right:auto;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;margin-bottom:16px;border-radius:999px;background:var(--mine);color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;}
#suggests{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;max-width:680px;width:100%;position:relative;z-index:1;margin-left:auto;margin-right:auto;}
.sugg{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:11px 18px;color:var(--text);font-family:inherit;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:10px;white-space:nowrap;flex:0 0 auto;box-shadow:0 1px 6px var(--shadow);transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;}
.sugg:hover{transform:translateY(-1px);border-color:var(--accent);box-shadow:0 6px 18px var(--shadow);}
.model-section{margin-top:26px;text-align:left;position:relative;z-index:1;}
.ms-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;}
.ms-title{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:800;margin-left:12px;}
.ms-count{font-size:13px;color:var(--muted);}
.model-list{display:flex;flex-wrap:wrap;gap:8px;max-height:160px;overflow-y:auto;padding:4px;}
.mname{background:var(--panel);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:8px 14px;font-size:12.5px;font-family:var(--mono);cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px;transition:all .15s ease;}
.mname:hover,.mname.active{border-color:var(--accent);color:var(--accent);background:var(--mine);font-weight:700;}
/* ===== chat area, messages, typing, composer ===== */
#chat-wrap{flex:1 1 auto;overflow-y:auto;scroll-behavior:smooth;min-height:0;display:none;position:relative;}
#chat{max-width:760px;margin:0 auto;padding:24px 26px 12px;display:flex;flex-direction:column;gap:24px;}
.msg{display:flex;gap:12px;line-height:1.75;font-size:15.5px;word-break:break-word;animation:rise .32s ease both;position:relative;}
@keyframes rise{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}
.msg.user{flex-direction:row-reverse;}
.msg .avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0;font-weight:700;}
.msg.user .avatar{background:var(--base-tertiary);border:1px solid var(--line);color:var(--muted);}
.msg.user .avatar svg{width:14px;height:14px;}
.msg.ai .avatar{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:var(--accent-ink);border-radius:50%;overflow:hidden;box-shadow:0 2px 10px var(--primary-glow);}
.msg.ai .avatar img{width:100%;height:100%;object-fit:cover;display:block;}
.msg.error .avatar{background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text);}
.msg .body{flex:1;min-width:0;padding-top:3px;}
.msg.user .body{white-space:pre-wrap;background:var(--accent);color:var(--accent-ink);border-radius:18px 18px 6px 18px;padding:12px 17px;box-shadow:0 2px 10px var(--shadow);max-width:78%;}
.msg.error .body{color:var(--err);background:var(--error-bg);border:1px solid var(--error-border);border-radius:14px;padding:11px 15px;}
.msg.ai .body{position:relative;max-width:92%;display:flex;flex-direction:column;gap:10px;}
.msg.ai p{margin:6px 0;}
.msg.ai ul,.msg.ai ol{margin:6px 0 6px 22px;}
.msg.ai img{max-width:100%;border-radius:12px;margin-top:12px;border:1px solid var(--line);}
.msg.ai h1,.msg.ai h2,.msg.ai h3{font-weight:700;margin:12px 0 6px;letter-spacing:-.01em;}
.msg.ai pre{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;overflow-x:auto;margin:10px 0;font-family:var(--mono);font-size:13.5px;line-height:1.6;position:relative;box-shadow:0 1px 8px var(--shadow);}
html[data-theme="dark"] .msg.ai pre{background:var(--base-secondary);}
.msg.ai code{font-family:var(--mono);font-size:13px;color:var(--code);background:var(--code-bg);padding:3px 7px;border-radius:6px;}
.msg.ai pre code{background:none;padding:0;color:var(--text);white-space:pre-wrap;word-break:break-word;}
.copy-btn{position:absolute;top:8px;right:8px;background:var(--base-tertiary);border:1px solid var(--line);color:var(--muted);border-radius:6px;padding:3px 9px;font-size:11px;cursor:pointer;opacity:0;transform:translateY(-2px);transition:opacity .15s,transform .15s;font-family:var(--font-body);}
pre:hover .copy-btn{opacity:1;transform:translateY(0);}
.cursor{display:inline-block;width:7px;height:15px;background:var(--accent);vertical-align:text-bottom;animation:blink 1s steps(2) infinite;border-radius:2px;}
@keyframes blink{50%{opacity:0;}}
.msg .tools{position:absolute;top:-13px;right:0;display:flex;gap:4px;opacity:0;transition:opacity .15s;z-index:2;}
.msg.ai:hover .tools{opacity:1;}
.tools .tbtn{background:var(--panel);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:4px 12px;font-size:11.5px;cursor:pointer;font-family:var(--font-body);transition:color .13s,border-color .13s,background .13s;}
.tools .tbtn:hover{color:var(--accent);border-color:var(--accent);background:var(--mine);}
.attach-row{display:flex;align-items:center;gap:9px;margin-top:9px;padding:8px 11px;background:var(--base-tertiary);border:1px solid var(--line);border-radius:10px;}
.attach-row .ic{color:var(--muted);flex-shrink:0;display:flex;}
.attach-row img{max-height:40px;border-radius:7px;border:1px solid var(--line);}
.attach-row .nm{flex:1;min-width:0;font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
#typing{display:none;position:absolute;bottom:14px;left:50%;transform:translateX(-50%);z-index:6;align-items:center;justify-content:center;gap:9px;padding:9px 20px;font-size:13px;color:var(--muted);font-weight:600;background:var(--panel);border:1px solid var(--line);border-radius:999px;box-shadow:0 8px 26px var(--shadow);white-space:nowrap;}
#typing.show{display:inline-flex;animation:rise .3s ease both;}
#typing .dot{animation:blink 1.2s infinite;}
#typing .spin{display:inline-block;width:12px;height:12px;border:2px solid var(--accent);border-top-color:transparent;border-radius:50%;animation:rot .7s linear infinite;}
@keyframes rot{to{transform:rotate(360deg);}}
#composer-wrap{padding:12px clamp(16px,4%,36px) 18px;flex:0 0 auto;position:relative;z-index:2;}
#composer{max-width:780px;margin:0 auto;background:var(--composer);border:1px solid var(--line);border-radius:16px;padding:12px 14px;transition:border-color .2s ease,box-shadow .2s ease;box-shadow:0 2px 18px var(--shadow);position:relative;}
#composer:focus-within{border-color:var(--accent);box-shadow:0 2px 22px var(--shadow);}
#input{width:100%;background:none;border:none;outline:none;color:var(--text);font-size:16px;resize:none;font-family:inherit;max-height:200px;padding:6px 6px 2px;line-height:1.6;}
#input::placeholder{color:var(--muted);}
#composer .row{display:flex;align-items:center;gap:10px;padding:6px 2px 2px;}
select.model{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:999px;padding:8px 13px;font-size:13px;max-width:210px;cursor:pointer;font-family:var(--mono);transition:border-color .15s ease;}
select.model:hover,select.model:focus{border-color:var(--accent);outline:none;}
select.model option{background:var(--panel);color:var(--text);}
.mini-toggle{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:12px;cursor:pointer;}
.mini-toggle input{accent-color:var(--accent);}
.hint-text{font-size:11px;color:var(--muted);margin-left:auto;}
.svg-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--muted);cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;transition:background .12s,color .12s,border-color .12s,transform .12s;flex-shrink:0;}
.svg-btn svg{display:block;}
.svg-btn:hover{background:var(--mine);color:var(--accent);border-color:var(--accent);transform:translateY(-1px);}
.svg-btn.md-off{opacity:.55;}
.svg-btn:not(.md-off){color:var(--accent);}
#md-preview-box{opacity:.7;padding:12px 0;border-top:1px dashed var(--line);}
#md-preview-box .body{padding:8px 14px;background:var(--base-tertiary);border:1px dashed var(--line);border-radius:10px;font-size:12.5px;}
#mic-btn{display:none;}
#mic-btn.recording{background:var(--error-bg);border-color:var(--error-border);color:var(--error-text);animation:micpulse 1.4s ease-out infinite;}
@keyframes micpulse{0%{box-shadow:0 0 0 0 rgba(229,72,77,.35);}100%{box-shadow:0 0 0 12px rgba(229,72,77,0);}}
#send-btn{width:42px;height:42px;border-radius:12px;border:none;background:var(--accent);color:var(--accent-ink);font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .14s ease,background .14s ease,border-radius .14s ease;flex-shrink:0;}
#send-btn:hover{transform:translateY(-1px);background:color-mix(in srgb,var(--accent) 85%,black);border-radius:14px;}
#send-btn:active{transform:translateY(0) scale(.95);}
#send-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;}
#send-btn.stop{background:var(--err);color:#fff;}
#attach-prev{display:none;max-width:780px;margin:0 auto 8px;}
#attach-prev.show{display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:9px 11px;animation:attachIn .18s ease-out;}
@keyframes attachIn{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}
#attach-prev img{max-height:64px;border-radius:9px;border:1px solid var(--line);}
#attach-prev .meta{flex:1;min-width:0;font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
#attach-prev .x{background:none;border:none;color:var(--muted);cursor:pointer;font-size:15px;padding:4px 6px;border-radius:6px;}
#attach-prev .x:hover{background:var(--error-bg);color:var(--error-border);}
#attach-prev .x svg{display:block;}
#slash-pop,#export-menu{position:fixed;bottom:110px;left:50%;transform:translateX(-50%);background:var(--panel);border:1px solid var(--line);border-radius:14px;z-index:30;box-shadow:0 16px 48px rgba(0,0,0,.5);overflow:hidden;display:none;}
#slash-pop.show,#export-menu.show{display:block;}
.slash-item{display:flex;align-items:center;gap:10px;width:100%;background:none;border:none;color:var(--text);padding:11px 14px;font-size:13px;cursor:pointer;text-align:left;font-family:var(--font-body);transition:background .12s;}
.slash-item:hover,.slash-item.sel{background:var(--mine);}
.slash-item .ic{width:24px;display:flex;align-items:center;justify-content:center;color:var(--muted);flex-shrink:0;}
.slash-item .cmd{font-family:var(--mono);color:var(--accent);font-size:12px;min-width:90px;}
.slash-item .desc{flex:1;color:var(--muted);font-size:12px;}
#export-menu-wrap{position:relative;display:none;}
#export-menu{bottom:auto;top:100%;right:0;left:auto;transform:none;position:absolute;min-width:170px;margin-top:4px;}
#export-menu button{display:block;width:100%;text-align:left;background:none;border:none;color:var(--text);padding:9px 12px;font-size:13px;cursor:pointer;font-family:var(--font-body);}
#export-menu button:hover{background:var(--mine);color:var(--accent);}
#export-btn{display:block;}
#backdrop{display:none;position:fixed;inset:0;background:rgba(23,17,45,.5);z-index:15;opacity:0;transition:opacity .25s;-webkit-tap-highlight-color:transparent;}
#backdrop.show{opacity:1;}
@media (max-width:768px){
  #sidebar{position:fixed;top:0;left:0;bottom:0;z-index:20;height:100dvh;width:min(280px,82vw);margin-left:0 !important;transform:translateX(-102%);transition:transform .22s ease;box-shadow:0 0 40px rgba(23,17,45,.4);}
  #sidebar.hidden{transform:translateX(-102%);margin-left:0 !important;}
  #topbar{padding:10px 12px;padding-top:calc(10px + env(safe-area-inset-top));gap:8px;}
  .header-pill,.model-chip{display:none;}
  #statusLabel{display:none;}
  #home{padding:12px 12px;}
  .welcome-inner{padding:36px 4px 6px;max-width:100%;}
  #home h2{font-size:clamp(24px,6.4vw,32px);}
  .sugg{padding:10px 15px;font-size:12.5px;}
  #chat{padding:18px 14px 8px;max-width:100%;}
  .msg{max-width:100%;}
  .msg.user .body{max-width:88%;}
  #typing{bottom:8px;}
  #composer-wrap{padding:8px 10px calc(10px + env(safe-area-inset-bottom));}
  #composer{border-radius:14px;padding:10px;}
  select.model{max-width:140px;padding:7px 9px;font-size:11.5px;}
  .hint-text{display:none;}
  #send-btn{width:38px;height:38px;border-radius:10px;}
}
@media (prefers-reduced-motion:reduce){.orb,.msg,#attach-prev.show,.sugg{animation:none;}#chat-wrap{scroll-behavior:auto;}}