@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@500;600;700&display=swap');

:root {
  --bg: #12140f;
  --panel: #1b1f16;
  --panel-2: #232819;
  --border: #34392a;
  --border-light: #454b37;
  --text: #ece8d9;
  --text-dim: #9a9c87;
  --accent: #ffb020;
  --accent-dim: #6b5322;
  --live: #6bdb7e;
  --live-dim: #294a2e;
  --danger: #e0554c;
  --danger-dim: #4a2622;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Consolas, monospace;
  --sans: -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  padding-bottom: 96px;
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

/* --- Header --- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 4px 20px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand h1 {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
}

.brand .tag {
  font-size: 12px;
  color: var(--text-dim);
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-dim);
  flex-shrink: 0;
}
.status-dot.connected { background: var(--live); box-shadow: 0 0 0 3px var(--live-dim); }
.status-dot.connecting { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.icon-btn:hover { border-color: var(--border-light); color: var(--text); }

.header-right { display: flex; align-items: center; gap: 12px; }

/* --- Section headings --- */
.section-label {
  font-size: 12px;
  color: var(--text-dim);
  margin: 0 0 10px 2px;
}

/* --- Channel grid --- */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 28px;
}

.channel-btn {
  aspect-ratio: 1;
  border-radius: 10px;
  border: 1px solid var(--border);
  border-top-color: var(--border-light);
  background: var(--panel);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.08s ease;
}
.channel-btn:active { transform: scale(0.94); }
.channel-btn.joined {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Active channel cards --- */
.channel-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-top-color: var(--border-light);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
}

.channel-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.channel-card-head .name {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 15px;
}

.leave-btn {
  font-size: 12px;
  color: var(--text-dim);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
}
.leave-btn:hover { color: var(--danger); }

.peer-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  min-height: 24px;
}

.peer-chip {
  font-size: 12px;
  color: var(--text-dim);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.peer-chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--border-light); }
.peer-chip.talking { color: var(--live); border-color: var(--live-dim); }
.peer-chip.talking .dot { background: var(--live); box-shadow: 0 0 6px var(--live); }
.peer-empty { font-size: 12px; color: var(--text-dim); font-style: italic; }

.ptt-btn {
  width: 100%;
  padding: 22px 0;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  user-select: none;
  transition: transform 0.06s ease, background 0.08s ease, border-color 0.08s ease;
}
.ptt-btn:active,
.ptt-btn.active {
  transform: scale(0.98);
  background: var(--live-dim);
  border-color: var(--live);
  color: var(--live);
  box-shadow: inset 0 0 0 1px var(--live);
}

/* --- Talk-to-all sticky bar --- */
.talk-all-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg) 60%, transparent);
  display: none;
}
.talk-all-bar.visible { display: block; }

.talk-all-btn {
  max-width: 448px;
  margin: 0 auto;
  width: 100%;
  padding: 18px 0;
  border-radius: 12px;
  border: 1px solid var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  user-select: none;
  transition: transform 0.06s ease, background 0.08s ease;
}
.talk-all-btn:active,
.talk-all-btn.active {
  transform: scale(0.98);
  background: var(--accent);
  color: #1a1200;
}

.empty-state {
  padding: 28px 16px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  border: 1px dashed var(--border);
  border-radius: 12px;
}

/* --- Warning banner --- */
.warning-banner {
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--danger-dim);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  margin-bottom: 16px;
}
.warning-banner.visible { display: flex; }

/* --- Modal --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  align-items: flex-end;
  justify-content: center;
  z-index: 50;
}
.modal-backdrop.visible { display: flex; }

.modal {
  background: var(--panel);
  border: 1px solid var(--border-light);
  border-radius: 16px 16px 0 0;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 20px;
}
@media (min-width: 540px) {
  .modal-backdrop { align-items: center; }
  .modal { border-radius: 16px; }
}

.modal h2 {
  font-family: var(--mono);
  font-size: 16px;
  margin: 0 0 16px;
}

.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.field input[type="password"],
.field input[type="number"],
.field input[type="text"],
.field select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: var(--sans);
}

.preset-row { display: flex; gap: 8px; margin-bottom: 14px; }
.preset-opt {
  flex: 1;
  text-align: center;
  padding: 10px 4px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
}
.preset-opt.selected { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

.manual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.checkbox-row { display: flex; gap: 16px; margin-top: 4px; }
.checkbox-row label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text); }

.modal-actions { display: flex; gap: 10px; margin-top: 18px; }
.btn {
  flex: 1;
  padding: 12px 0;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  background: var(--panel-2);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #1a1200; }
.field-error { color: var(--danger); font-size: 12px; margin-top: 6px; display: none; }
.field-error.visible { display: block; }
.settings-msg { font-size: 12px; margin-top: 10px; display: none; }
.settings-msg.ok { color: var(--live); display: block; }
.settings-msg.err { color: var(--danger); display: block; }

.name-prompt-note { font-size: 12px; color: var(--text-dim); margin-top: 8px; }