:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07121e;
  color: #e9f1f8;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --muted: #a4b4c4;
  --line: #294256;
  --panel: #0d1e2d;
  --cyan: #55dbd2;
  --gold: #f2c66d;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: radial-gradient(ellipse at 8% 0, #16334b 0, transparent 38rem), #07121e; }
button, input, textarea { font: inherit; }
button { min-height: 42px; border: 1px solid #496176; border-radius: 8px; background: #152b3c; color: #f2f7fb; padding: 9px 14px; cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--cyan); background: #1a394a; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { color: #06201f; border-color: var(--cyan); background: var(--cyan); font-weight: 750; }
button.primary:hover:not(:disabled) { background: #8af0e8; }
button.danger { border-color: #844957; background: #3a1e2a; color: #ffdbe2; }
input, textarea { width: 100%; border: 1px solid #3b5267; border-radius: 7px; padding: 10px 11px; background: #091722; color: #f2f7fb; }
textarea { resize: vertical; }
input:focus, textarea:focus, button:focus-visible, summary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
label { display: grid; gap: 6px; margin: 12px 0 6px; color: #d5e2ec; font-size: .9rem; }
.shell { max-width: 1240px; margin: 0 auto; padding: 26px clamp(14px, 4vw, 42px) 50px; }
.top, .brand, .section-heading, .actions, .form-row, .call-controls { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.top { padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.brand { justify-content: flex-start; }
.brand-mark { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--cyan); color: #06201f; font-size: 1.7rem; font-weight: 900; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 1.25rem; letter-spacing: -.02em; }
h2 { margin-bottom: 0; font-size: 1.12rem; }
.eyebrow { margin: 0 0 5px; color: var(--cyan); font-size: .68rem; font-weight: 800; letter-spacing: .13em; }
.badge, .secure-label, .count { white-space: nowrap; border: 1px solid var(--line); border-radius: 999px; padding: 6px 10px; color: var(--muted); font-size: .76rem; }
.badge.connected { border-color: #317763; color: #8ef0bb; }
.intro { max-width: 820px; padding: 36px 0 22px; }
.intro h2 { margin: 7px 0 12px; font-size: clamp(1.5rem, 4vw, 2.35rem); line-height: 1.15; letter-spacing: -.04em; }
.intro p:not(.eyebrow) { color: var(--muted); line-height: 1.6; }
.notice { border-left: 3px solid var(--gold); padding: 10px 12px; background: #30281955; color: #f4dfb5 !important; font-size: .88rem; line-height: 1.5; }
.panel { border: 1px solid var(--line); border-radius: 13px; background: linear-gradient(145deg, #102436, var(--panel)); padding: 19px; box-shadow: 0 10px 28px #0002; }
.setup { max-width: 720px; }
.auth-panel { max-width: 720px; margin-bottom: 14px; }
.login-form { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 12px; }
.login-form label { margin-bottom: 0; }
.login-form button { min-width: 130px; }
.auth-panel [data-error="true"] { color: #ffb4c1; }
.auth-panel > button { margin: 8px 8px 0 0; }
.retention { margin-top: 14px; color: var(--muted); font-size: .8rem; line-height: 1.5; }
.retention summary { cursor: pointer; color: #d5e2ec; }
.retention ul { padding-left: 20px; }
.retention li { margin: 6px 0; }
.fingerprint { max-width: 220px; overflow-wrap: anywhere; text-align: right; color: var(--gold); font: .68rem/1.4 ui-monospace, monospace; }
.actions { justify-content: flex-start; flex-wrap: wrap; margin: 16px 0 5px; }
.hint { color: var(--muted); font-size: .81rem; line-height: 1.55; }
.workspace { grid-template-columns: minmax(245px, .78fr) minmax(0, 1.6fr); gap: 16px; margin-top: 20px; align-items: start; }
.workspace:not([hidden]) { display: grid; }
.side { position: sticky; top: 15px; }
.side .section-heading { margin-bottom: 13px; }
.side > button { width: 100%; margin-top: 12px; }
.side textarea { font: .72rem/1.4 ui-monospace, monospace; }
.members { display: grid; gap: 8px; margin: 18px 0; }
.member { padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #081722; }
.member-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.member-name { overflow: hidden; text-overflow: ellipsis; font-weight: 700; }
.member-id { display: block; margin-top: 5px; color: var(--gold); font: .65rem/1.4 ui-monospace, monospace; overflow-wrap: anywhere; }
.member-actions { display: flex; gap: 5px; margin-top: 8px; }
.member-actions button { flex: 1; min-height: 34px; padding: 5px; font-size: .75rem; }
.call-box { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 14px 0; }
.call-box input { font-size: .8rem; }
.main-column { display: grid; gap: 14px; min-width: 0; }
.chat-panel .section-heading { margin-bottom: 5px; }
.secure-label { color: #9af1c2; }
.messages { display: flex; flex-direction: column; gap: 9px; min-height: 220px; max-height: 430px; overflow-y: auto; margin: 13px 0; padding: 12px; border: 1px solid #233e52; border-radius: 8px; background: #07141f; }
.message { max-width: 88%; align-self: flex-start; padding: 9px 11px; border: 1px solid #294558; border-radius: 9px; background: #102638; overflow-wrap: anywhere; white-space: pre-wrap; }
.message.own { align-self: flex-end; border-color: #236660; background: #0e3435; }
.message.broker { border-color: #80642e; background: #302918; }
.message.warning { max-width: 100%; border-color: #844957; color: #ffdbe2; }
.message-head { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 5px; color: #b4c4d2; font-size: .72rem; }
.message-body { line-height: 1.5; }
.message-meta { margin-top: 7px; color: var(--muted); font-size: .69rem; }
.compose { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 9px; }
.communication-helper { margin: 14px 0; border-color: #3b786f; }
.communication-helper summary { color: var(--cyan); cursor: pointer; font-weight: 700; }
.communication-helper[open] summary { margin-bottom: 12px; }
.communication-helper .hint { max-width: 80ch; }
.brokerage summary { cursor: pointer; display: flex; justify-content: space-between; gap: 10px; list-style: none; }
.brokerage summary::-webkit-details-marker { display: none; }
.brokerage[open] summary { margin-bottom: 12px; }
.broker-form { display: grid; grid-template-columns: 1fr; }
.form-row { align-items: flex-start; }
.form-row label { flex: 1; }
.call-panel .section-heading { margin-bottom: 12px; }
.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
video { width: 100%; max-height: 280px; aspect-ratio: 16 / 9; border-radius: 8px; background: #050a0e; object-fit: cover; }
footer { margin-top: 22px; color: var(--muted); font-size: .78rem; line-height: 1.6; }
footer details { border: 1px solid var(--line); border-radius: 10px; padding: 13px 16px; background: #0b1a27; }
footer summary { color: #d5e2ec; cursor: pointer; }
footer ul { padding-left: 20px; }
footer li { margin: 7px 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 760px) {
  .workspace:not([hidden]) { grid-template-columns: 1fr; }
  .side { position: static; }
}
@media (max-width: 460px) {
  .shell { padding-top: 16px; }
  .panel { padding: 14px; }
  .form-row { display: grid; grid-template-columns: 1fr 90px; gap: 8px; }
  .compose { grid-template-columns: 1fr; }
  .compose button { justify-self: end; }
  .brokerage summary { display: grid; }
  .login-form { grid-template-columns: 1fr; }
  .login-form button { justify-self: end; }
}