:root{
  --bg1:#eef3ff;
  --bg2:#e7efff;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#6b7280;
  --muted2:#94a3b8;
  --icon:#9aa4b2;
  --primary:#4f46e5;
  --primaryHover:#4338ca;
  --shadow: 0 18px 50px rgba(15,23,42,.12);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 30% 0%, var(--bg1), transparent 70%),
    radial-gradient(1200px 700px at 70% 100%, var(--bg2), transparent 70%),
    linear-gradient(180deg, #edf2ff 0%, #eaf0ff 55%, #e7efff 100%);
}
.page{min-height:100%; display:grid; place-items:center; padding:clamp(18px,4vw,48px) clamp(14px,3vw,18px)}
.card{
  width:min(520px, 100%);
  background:var(--card);
  border:1px solid rgba(15,23,42,.10);
  border-radius:14px;
  padding:clamp(22px, 4vw, 34px) clamp(18px, 4vw, 34px) clamp(18px, 3.5vw, 30px);
  box-shadow:var(--shadow);
}
.header{display:flex; flex-direction:column; align-items:center; text-align:center; gap:12px; margin-bottom:20px}
.brandLogo{
  width: min(280px, 86%);
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(15,23,42,.12));
}
.title{margin:0; font-size:clamp(28px, 3.2vw, 34px); font-weight:800; letter-spacing:-.02em}
.subtitle{margin:0; font-size:clamp(13px, 1.8vw, 15px); color:var(--muted)}
.form{display:flex; flex-direction:column; gap:14px; margin-top:6px}
.field{display:flex; flex-direction:column; gap:8px}
.label{font-size:13px; color:#111827; font-weight:700}
.inputWrap{position:relative}
.inputIcon{position:absolute; left:12px; top:50%; transform:translateY(-50%); width:18px; height:18px; color:var(--icon); pointer-events:none}
.inputIcon svg{width:18px; height:18px; display:block}
.input{width:100%; height:44px; border-radius:10px; border:1px solid rgba(15,23,42,.14); background:#fff; color:var(--text); padding:10px 70px 10px 40px; outline:none; font-size:14px}
.input:focus{border-color: rgba(79,70,229,.45); box-shadow: 0 0 0 3px rgba(79,70,229,.16)}
.passToggle{
  position:absolute;
  right:8px;
  top:50%;
  transform:translateY(-50%);
  border:1px solid rgba(15,23,42,.14);
  background:#fff;
  color:#334155;
  border-radius:8px;
  height:28px;
  min-width:54px;
  padding:0 10px;
  font-size:12px;
  font-weight:700;
  cursor:pointer;
}
.passToggle:hover{
  border-color: rgba(79,70,229,.35);
  color:#3730a3;
}
.remember{display:flex; align-items:center; gap:10px; font-size:14px; color:#111827; margin-top:2px}
.remember input{width:14px; height:14px; accent-color: var(--primary)}
.button{margin-top:2px; height:44px; width:100%; border:none; border-radius:10px; background:var(--primary); color:#fff; font-weight:700; cursor:pointer; font-size:14px}
.button:hover{background:var(--primaryHover)}
.button--secondary{
  background: rgba(15,23,42,.05);
  border: 1px solid rgba(15,23,42,.14);
  color: #0f172a;
}
.button--secondary:hover{
  background: rgba(79,70,229,.10);
  border-color: rgba(79,70,229,.35);
}
.status{margin:8px 0 0; min-height:18px; font-size:13px; color:var(--muted); text-align:center}
.status--error{color:#b91c1c}
.meta{margin-top:18px; padding-top:16px; border-top:1px solid rgba(15,23,42,.10); text-align:center; font-size:13px; color:var(--muted)}
.metaLine{margin-top:4px}
.metaLine:first-child{margin-top:0}
.metaKey{font-weight:600}
.metaVal{font-weight:500}
.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}
.rtcPanel{display:none}
.rtcPanel--modal{display:block}

.loginDebug{
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(15,23,42,.10);
}
.debugTitle{
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .01em;
  color: #334155;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.debugGrid{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 6px 10px;
  align-items: start;
}
.debugK{
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
}
.debugV{
  font-size: 12px;
  color: #0f172a;
  word-break: break-word;
}
.debugPre{
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(15,23,42,.12);
  background: rgba(15,23,42,.03);
  font-size: 11px;
  line-height: 1.35;
  max-height: 180px;
  overflow: auto;
}

.settingsOverlay{
  position:fixed;
  inset:0;
  background:
    radial-gradient(1200px 700px at 20% 0%, rgba(79,70,229,.22), transparent 55%),
    radial-gradient(1200px 700px at 80% 100%, rgba(99,102,241,.22), transparent 55%),
    rgba(2,6,23,.62);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px 14px;
  z-index: 1000;
  backdrop-filter: blur(6px);
}
.settingsOverlay[hidden]{display:none !important}
.settingsOverlayCard{
  position:relative;
  width: min(860px, 100%);
  max-height: min(82vh, 820px);
  overflow:hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.92));
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 18px;
  box-shadow:
    0 30px 90px rgba(2,6,23,.45),
    0 10px 30px rgba(2,6,23,.25);
  display:flex;
  flex-direction:column;
}
.settingsOverlayCard::before{
  content:"";
  display:block;
  height:4px;
  background: linear-gradient(90deg, rgba(79,70,229,1), rgba(34,211,238,1));
}
.settingsHeader{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:14px;
  padding: 16px 16px 12px;
  border-bottom: 1px solid rgba(15,23,42,.10);
}
.settingsTitle{font-weight:950; letter-spacing:-.03em; font-size:18px; color:#0b1220}
.settingsSub{margin-top:2px; font-size:12px; color:var(--muted)}
.settingsOverlayClose{
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(15,23,42,.12);
  background: rgba(15,23,42,.04);
  color: #0f172a;
  cursor:pointer;
  font-size: 18px;
  line-height: 1;
  display:grid;
  place-items:center;
}
.settingsOverlayClose:hover{
  background: rgba(79,70,229,.10);
  border-color: rgba(79,70,229,.35);
}
.settingsTabs{
  display:flex;
  gap:8px;
  padding: 10px 16px 12px;
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.settingsTab{
  border:1px solid rgba(15,23,42,.10);
  background: rgba(248,250,252,.9);
  color:#0f172a;
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 800;
  font-size: 12px;
  cursor:pointer;
}
.settingsTab:hover{background: rgba(79,70,229,.10); border-color: rgba(79,70,229,.30)}
.settingsTab.isActive{
  background: linear-gradient(180deg, rgba(79,70,229,.18), rgba(79,70,229,.10));
  border-color: rgba(79,70,229,.42);
  color:#3730a3;
}
.settingsBody{
  padding: 14px 16px 16px;
  overflow:auto;
}
.tabPane{display:none}
.tabPane.isActive{display:block}
.paneCard{
  background: rgba(255,255,255,.90);
  border:1px solid rgba(15,23,42,.08);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 24px rgba(2,6,23,.08);
}
.paneCard + .paneCard{margin-top:12px}
.paneTitle{font-weight:950; font-size:14px; color:#0b1220}
.paneSub{margin-top:3px; font-size:12px; color:var(--muted); line-height:1.35}
.formGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  margin-top:12px;
}
.f{display:flex; flex-direction:column; gap:8px}
.k{font-size:12px; font-weight:800; color:#111827}
.previewRow{margin-top:12px; display:flex; flex-direction:column; gap:8px}
.diagActions{display:flex; align-items:center; gap:12px; margin-top:12px; flex-wrap:wrap}
.rtcStatus{margin:0; font-size:12px; color:var(--muted)}
.settingsFooter{
  padding: 12px 16px;
  border-top: 1px solid rgba(15,23,42,.10);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  background: rgba(255,255,255,.86);
}
.footerHint{font-size:12px; color:var(--muted)}
.footerBtns{display:flex; gap:10px; align-items:center}
.switchRow{display:flex; gap:10px; align-items:flex-start}
.switchRow input{margin-top:3px; width:16px; height:16px; accent-color: var(--primary)}
.switchRowText{font-size:12px; color:var(--muted); line-height:1.35}
.rtcPreview{
  padding:10px 12px;
  border-radius:10px;
  border:1px solid rgba(15,23,42,.10);
  background:#0b1020;
  color:#e5e7eb;
  font-size:12px;
  line-height:1.35;
  word-break: break-word;
}
.rtcSelect,.rtcInput{
  height:40px;
  border-radius:10px;
  border:1px solid rgba(15,23,42,.12);
  background:#f8fafc;
  padding:0 12px;
  outline:none;
  font-size:13px;
}
.rtcSelect:focus,.rtcInput:focus{
  border-color: rgba(79,70,229,.45);
  box-shadow: 0 0 0 3px rgba(79,70,229,.16);
  background:#fff;
}
.rtcTextarea{
  width:100%;
  resize: vertical;
  border-radius:10px;
  border:1px solid rgba(15,23,42,.12);
  background:#f8fafc;
  padding:10px 12px;
  outline:none;
  font-size:12px;
  line-height:1.35;
  min-height:92px;
}
.rtcTextarea:focus{
  background:#fff;
  border-color: rgba(79,70,229,.45);
  box-shadow: 0 0 0 3px rgba(79,70,229,.16);
}
.rtcHelp{
  font-size:12px;
  color:var(--muted);
  line-height:1.35;
}
.rtcActions{display:none}
.rtcBtn{
  height:42px;
  border-radius:10px;
  border:1px solid rgba(79,70,229,.35);
  background: rgba(79,70,229,.08);
  color:#3730a3;
  font-weight:800;
  cursor:pointer;
  font-size:13px;
  padding: 0 14px;
}
.rtcBtn:hover{background: rgba(79,70,229,.12)}
.rtcBtn--secondary{
  border-color: rgba(15,23,42,.16);
  background: rgba(15,23,42,.04);
  color:#0f172a;
}
.rtcStatus{margin-top:12px; font-size:13px; color:var(--muted)}
.rtcPre{
  margin-top:10px;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid rgba(15,23,42,.10);
  background:#0b1020;
  color:#e5e7eb;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 260px;
  overflow:auto;
}
@media (max-width: 480px){
  .page{padding:16px 12px}
  .card{
    border-radius:16px;
    padding:18px 14px 16px;
  }
  .brandLogo{width:min(230px, 86%)}
  .title{font-size:28px}
  .subtitle{font-size:13px}
  .form{gap:12px}
  .input{height:46px; font-size:16px} /* avoid mobile zoom on input focus */
  .button{height:46px; font-size:15px}
  .passToggle{height:30px}
  .formGrid{grid-template-columns: 1fr}
  .settingsOverlay{padding:10px}
  .settingsOverlayCard{
    max-height:88vh;
    border-radius:16px;
  }
  .settingsTabs{overflow:auto}
  .settingsTabs::-webkit-scrollbar{height:6px}
  .settingsTabs::-webkit-scrollbar-thumb{background: rgba(15,23,42,.18); border-radius:999px}
  .settingsFooter{flex-direction:column; align-items:stretch}
  .footerBtns{justify-content:stretch}
  .footerBtns .rtcBtn{width:100%}
}