:root {
  color-scheme: dark;
  --bg: #0a0f1a;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-2: rgba(255, 255, 255, 0.07);
  --panel-border: rgba(255, 255, 255, 0.09);
  --accent: #22c55e;
  --accent-2: #16a34a;
  --accent-soft: rgba(34, 197, 94, 0.15);
  --danger: #ef4444;
  --text: #f1f5f9;
  --text-dim: #8a96ad;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 15%, rgba(34, 197, 94, 0.18), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.12), transparent 50%);
  pointer-events: none;
}

.screen {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.screen[hidden] {
  display: none;
}

#join-screen {
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  backdrop-filter: blur(20px);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.logo-badge {
  width: 72px;
  height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px var(--accent-soft);
}

h1 { margin: 18px 0 0; font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }
.subtitle { color: var(--text-dim); margin: 6px 0 28px; font-size: 14px; }

form { display: flex; flex-direction: column; gap: 6px; text-align: left; }
label { font-size: 12px; font-weight: 600; color: var(--text-dim); margin-top: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.optional { text-transform: none; font-weight: 400; opacity: 0.7; }
input {
  background: var(--panel-2);
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input::placeholder { color: #5b6579; }

button {
  font: inherit;
  cursor: pointer;
  border: none;
}

form button[type="submit"] {
  margin-top: 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  padding: 15px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 8px 24px var(--accent-soft);
  transition: transform 0.1s, box-shadow 0.15s;
}
form button[type="submit"]:active { transform: scale(0.98); }
form button[type="submit"]:disabled { opacity: 0.7; pointer-events: none; }

.btn-spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: white;
  animation: spin 0.7s linear infinite;
}
.btn-spinner[hidden] { display: none; }

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

.error {
  color: var(--danger);
  margin-top: 14px;
  font-size: 13.5px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
}

.install-btn {
  margin-top: 18px;
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--panel-border);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}
.install-btn[hidden] { display: none; }

/* Channel screen */
.channel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.02);
}
.channel-name { font-size: 19px; font-weight: 700; letter-spacing: -0.01em; }
.status-row { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-dim); margin-top: 3px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-connecting { background: #f59e0b; box-shadow: 0 0 8px #f59e0b; }
.dot-connected { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.dot-disconnected { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

.leave-btn {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.25);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
}

.members {
  padding: 18px 20px 8px;
  flex: 0 0 auto;
  max-height: 26dvh;
  overflow-y: auto;
}
.members h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.count-pill {
  background: var(--panel-2);
  color: var(--text);
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}
#member-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
#member-list li {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}
#member-list li.talking { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 700; }

.ptt-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 24px;
}

.speaking-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--accent);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}
.speaking-indicator[hidden] { display: none; }
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.ptt-button {
  position: relative;
  width: min(58vw, 216px);
  height: min(58vw, 216px);
  border-radius: 50%;
  background: linear-gradient(160deg, var(--panel-2), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--panel-border);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  user-select: none;
  touch-action: none;
  transition: transform 0.12s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.ptt-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
}
.ptt-button .ptt-icon { font-size: 46px; }
.ptt-button .ptt-label { font-size: 12.5px; font-weight: 700; letter-spacing: 0.04em; color: var(--text-dim); }

.ptt-button.active {
  background: linear-gradient(160deg, var(--accent), var(--accent-2));
  border-color: var(--accent);
  transform: scale(0.95);
  box-shadow: 0 0 0 14px var(--accent-soft), 0 20px 50px rgba(0, 0, 0, 0.4);
}
.ptt-button.active .ptt-label { color: white; }

.ptt-button.blocked {
  border-color: var(--danger);
  box-shadow: 0 0 0 10px rgba(239, 68, 68, 0.12);
}

.ptt-button:disabled { opacity: 0.55; }

.hint { color: var(--text-dim); font-size: 13px; text-align: center; margin: 0; }
.hint-warn { color: #fbbf24; max-width: 280px; }

/* Log panel */
.log-panel {
  border-top: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.015);
}
.log-toggle {
  width: 100%;
  background: transparent;
  color: var(--text-dim);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
}
.caret { transition: transform 0.2s; }
.caret.open { transform: rotate(180deg); }

.log-list {
  list-style: none;
  margin: 0;
  padding: 0 20px 16px;
  max-height: 22dvh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.log-list[hidden] { display: none; }
.log-list li {
  font-size: 12.5px;
  color: var(--text-dim);
  display: flex;
  gap: 8px;
}
.log-list .log-time { opacity: 0.6; min-width: 42px; }
.log-list .log-join { color: var(--accent); }
.log-list .log-leave { color: #94a3b8; }