/* ============================================================
   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; }

/* ================== kartu media (gambar/video) ================== */
.media-card {
  display:flex; flex-direction:column; gap:10px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  margin-top:12px;
  max-width:480px;
  overflow:hidden;
}
.media-head { display:flex; align-items:center; gap:8px; }
.media-ico { font-size:16px; line-height:1; }
.media-label { font-size:13px; font-weight:700; color:var(--muted); letter-spacing:.02em; }
.media-thumb { display:block; width:100%; border-radius:10px; overflow:hidden; background:var(--composer); }
.media-thumb img { display:block; width:100%; height:auto; max-height:420px; object-fit:cover; }
.media-video-wrap { display:block; width:100%; }
.media-vid { display:block; width:100%; border-radius:10px; max-height:420px; background:#000; }

/* fallback ilustrasi animasi (Ken Burns) untuk video yang tidak tersedia */
.media-burns-wrap { width:100%; border-radius:10px; overflow:hidden; background:var(--composer); }
.media-burns {
  display:block; width:100%; height:auto; max-height:420px;
  animation:mburns 16s ease-in-out infinite alternate;
}
@keyframes mburns {
  0%   { transform:scale(1) translate(0,0); }
  100% { transform:scale(1.15) translate(-2.5%,1.5%); }
}
.media-caption { font-size:13px; color:var(--muted); line-height:1.5; word-break:break-word; }
.media-actions { display:flex; gap:6px; flex-wrap:wrap; }

.media-skel { display:flex; align-items:center; gap:10px; padding:22px 14px; justify-content:center; }
.media-spin {
  width:18px; height:18px; border-radius:50%;
  border:2px solid var(--line); border-top-color:var(--accent);
  animation:media-spin 0.9s linear infinite;
}
@keyframes media-spin { to { transform:rotate(360deg); } }
.media-loading { font-size:13px; color:var(--muted); font-weight:600; }
.media-err { font-size:13px; color:#e5484d; font-weight:600; }

/* chip pembuat media di layar sambutan */
.media-suggest {
  display:flex; gap:10px; flex-wrap:wrap;
  justify-content:center;
  margin-top:14px;
}
.media-chip {
  display:flex; align-items:center; gap:10px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:10px 14px;
  cursor:pointer;
  color:var(--text);
  text-align:left;
  transition:all .16s ease;
}
.media-chip:hover { border-color:var(--accent); transform:translateY(-1px); box-shadow:0 4px 16px var(--shadow); }
.mc-ico { font-size:20px; line-height:1; }
.mc-tx { display:flex; flex-direction:column; }
.mc-tx b { font-size:14px; }
.mc-tx small { font-size:12px; color:var(--muted); }

/* tombol mode media di composer */
.cf-actions { display:flex; align-items:center; gap:8px; }
.media-btn {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--muted);
  border-radius:999px;
  padding:8px 13px;
  font-size:13px;
  font-family:inherit;
  font-weight:700;
  cursor:pointer;
  transition:all .15s ease;
}
.media-btn:hover { color:var(--accent); border-color:var(--accent); }
.media-btn.active {
  color:var(--accent-ink);
  background:var(--accent);
  border-color:var(--accent);
}

/* 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; }
  .cf-actions { gap:6px; }
  .media-btn { padding:7px 10px; font-size:12px; }
  .media-btn span { display:none; }
  .media-btn svg { margin:0; }
  .media-card { max-width:100%; }
  .media-suggest { justify-content:flex-start; }
  .media-chip { flex:1 1 100%; max-width:100%; }
}