:root {
  --bg: #0b0b0d;
  --panel: #131318;
  --panel2: #1b1b21;
  --text: #f3f4f6;
  --muted: #a7acb5;
  --line: rgba(255,255,255,.08);
  --gold: #d2af68;
  --goldsoft: rgba(210,175,104,.16);
  --shadow: 0 18px 50px rgba(0,0,0,.35);
}
html[data-theme='light'] {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel2: #edf0f5;
  --text: #151515;
  --muted: #5e6672;
  --line: rgba(0,0,0,.08);
  --gold: #8c6a25;
  --goldsoft: rgba(140,106,37,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}
* { box-sizing: border-box; }
html, body { margin:0; padding:0; font-family: Inter, Arial, sans-serif; background: radial-gradient(circle at top, rgba(210,175,104,.09), transparent 24%), var(--bg); color: var(--text); }
body { min-height: 100vh; }
button, input, textarea, select { font: inherit; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel2);
  color: var(--text);
  padding: 14px 16px;
}
textarea { resize: none; min-height: 56px; max-height: 220px; }
label { display: block; margin-bottom: 8px; color: var(--muted); font-size: .92rem; }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.centurion-card::before {
  content:'';
  position:absolute;
  inset:0;
  background: linear-gradient(135deg, transparent, rgba(210,175,104,.08), transparent);
  pointer-events:none;
}
.centurion-card { position: relative; overflow: hidden; }
.login-body { display:grid; place-items:center; padding:24px; }
.login-shell { width:100%; max-width: 520px; }
.login-shell .card { padding: 28px; }
.brand-row { display:flex; gap:16px; align-items:center; margin-bottom:20px; }
.brand-mark { width:64px; height:64px; border-radius:20px; background: linear-gradient(135deg, #000, #272727); border:1px solid rgba(210,175,104,.35); }
.eyebrow { color: var(--gold); letter-spacing:.18em; text-transform:uppercase; font-size:.74rem; }
.muted { color: var(--muted); }
.alert.error { background: rgba(255,90,90,.12); border:1px solid rgba(255,90,90,.25); color:#ffc2c2; padding:12px 14px; border-radius:14px; margin-bottom:16px; }
.stack { display:flex; flex-direction:column; }
.gap-md { gap:16px; }
.btn {
  border: none;
  cursor: pointer;
  border-radius: 14px;
  padding: 13px 16px;
  transition: transform .15s ease, opacity .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(180deg, var(--gold), #8a6726); color:#111; font-weight:700; }
.btn-secondary { background: var(--panel2); color: var(--text); border:1px solid var(--line); }
.btn-block { width:100%; }
.icon-btn {
  width:44px; height:44px; display:inline-flex; align-items:center; justify-content:center;
  border-radius:14px; background:var(--panel2); border:1px solid var(--line); color:var(--text); text-decoration:none;
}
.footer-note { margin-top:16px; color:var(--muted); font-size:.92rem; }
.app-shell { display:grid; grid-template-columns: 290px 1fr; min-height:100vh; }
.sidebar {
  border-right:1px solid var(--line);
  background: rgba(0,0,0,.14);
  backdrop-filter: blur(10px);
  padding:18px;
}
.sidebar-top { display:flex; flex-direction:column; gap:12px; margin-bottom:18px; }
.chat-list { display:flex; flex-direction:column; gap:10px; }
.chat-item {
  padding:14px;
  border-radius:16px;
  border:1px solid var(--line);
  background: var(--panel);
  cursor:pointer;
}
.chat-item.active { background: var(--goldsoft); border-color: rgba(210,175,104,.55); }
.main-panel { display:flex; flex-direction:column; min-width:0; }
.topbar {
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 22px; border-bottom:1px solid var(--line);
  position: sticky; top:0; z-index:10; backdrop-filter: blur(10px); background: rgba(11,11,13,.75);
}
html[data-theme='light'] .topbar { background: rgba(246,247,251,.85); }
.topbar-left, .topbar-right { display:flex; align-items:center; gap:12px; }
.top-title { font-size:1.05rem; font-weight:700; }
.messages { flex:1; overflow:auto; padding:24px; display:flex; flex-direction:column; gap:16px; }
.msg {
  max-width: 860px;
  padding: 16px 18px;
  border-radius: 20px;
  line-height: 1.55;
  white-space: pre-wrap;
  border:1px solid var(--line);
}
.msg.user { margin-left:auto; background: linear-gradient(180deg, rgba(210,175,104,.18), rgba(210,175,104,.08)); }
.msg.assistant { margin-right:auto; background: var(--panel); }
.msg.system { margin: 0 auto; background: rgba(255,255,255,.03); color: var(--muted); }
.composer-wrap { padding:16px 18px 20px; border-top:1px solid var(--line); }
.upload-row { display:flex; gap:12px; align-items:center; margin-bottom:10px; }
.upload-hint { color:var(--muted); font-size:.9rem; }
.upload-tray { display:flex; flex-wrap:wrap; gap:10px; margin-bottom:10px; }
.upload-chip { background: var(--panel2); border:1px solid var(--line); padding:8px 12px; border-radius:999px; font-size:.9rem; }
.composer {
  display:grid; grid-template-columns:1fr auto auto auto; gap:10px; align-items:end;
  border:1px solid var(--line); background:var(--panel); padding:12px; border-radius:22px;
}
.drawer { position:fixed; inset:0; display:none; background: rgba(0,0,0,.55); backdrop-filter: blur(6px); z-index:100; }
.drawer.open { display:block; }
.drawer-card {
  position:absolute; top:0; right:0; width:min(460px,100%); height:100%;
  background:var(--panel); border-left:1px solid var(--line); padding:22px; box-shadow:var(--shadow);
}
.drawer-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; }
.voice-orb-overlay {
  position:fixed; inset:0; background: rgba(0,0,0,.6);
  display:grid; place-items:center; z-index:110;
}
.voice-orb-overlay.hidden { display:none; }
.voice-orb-wrap { text-align:center; background:var(--panel); border:1px solid var(--line); border-radius:28px; padding:30px; width:min(460px, calc(100vw - 30px)); position:relative; box-shadow:var(--shadow); }
.voice-close { position:absolute; top:12px; right:12px; }
.voice-orb {
  width:140px; height:140px; border-radius:50%; margin:10px auto 18px;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,.24), rgba(210,175,104,.18), rgba(210,175,104,.04));
  border:1px solid rgba(210,175,104,.35); position:relative; overflow:hidden;
  animation: pulse 2.6s infinite ease-in-out;
}
.voice-orb span {
  position:absolute; inset:12px; border-radius:50%;
  border:1px solid rgba(210,175,104,.15); animation: spin 10s linear infinite;
}
.voice-orb span:nth-child(2) { inset:24px; animation-duration: 7s; }
.voice-orb span:nth-child(3) { inset:36px; animation-duration: 4s; }
.voice-status { color: var(--muted); margin-bottom: 16px; }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.06); } }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: 290px; transform: translateX(-100%); transition: transform .2s ease; z-index: 120; }
  .sidebar.open { transform: translateX(0); }
}