:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #2f81f7;
  --green: #2ea043;
  --green-hover: #3fb950;
  --red: #da3633;
  --red-hover: #f85149;
  --amber: #d29922;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Garante que o atributo [hidden] sempre oculte, mesmo em elementos
   com display flex/grid explícito. */
[hidden] { display: none !important; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #16202e 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.app {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
}
.logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
.status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-dim);
}
.status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--text-dim);
  transition: background .3s, box-shadow .3s;
}
.status[data-state="registered"] .status-dot { background: var(--green); box-shadow: 0 0 8px var(--green); }
.status[data-state="connecting"] .status-dot { background: var(--amber); box-shadow: 0 0 8px var(--amber); animation: pulse 1s infinite; }
.status[data-state="error"] .status-dot { background: var(--red); box-shadow: 0 0 8px var(--red); }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  line-height: 1;
  transition: background .2s, color .2s;
}
.icon-btn:hover { background: rgba(255,255,255,.06); color: var(--text); }

/* Phone screen */
.phone { padding: 18px 20px 22px; }

.call-info {
  text-align: center;
  min-height: 54px;
  margin-bottom: 6px;
}
.call-peer { font-size: 18px; font-weight: 600; }
.call-state { font-size: 13px; color: var(--text-dim); margin-top: 2px; min-height: 16px; }
.call-timer { font-size: 15px; color: var(--green); font-variant-numeric: tabular-nums; margin-top: 2px; }

/* Display */
.display {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.number-input {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 24px;
  text-align: center;
  padding: 12px 10px;
  letter-spacing: 1px;
  outline: none;
}
.number-input:focus { border-color: var(--accent); }
.backspace {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 22px;
  cursor: pointer;
  padding: 6px 4px;
}
.backspace:hover { color: var(--text); }

/* Keypad */
.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.key {
  aspect-ratio: 1.35 / 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  transition: transform .06s, background .15s;
  user-select: none;
}
.key:hover { background: #2b3340; }
.key:active { transform: scale(0.95); background: var(--accent); }
.key .num { font-size: 24px; font-weight: 600; line-height: 1; }
.key .sub { font-size: 9px; letter-spacing: 1.5px; color: var(--text-dim); min-height: 10px; }

/* In-call controls */
.in-call-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.round-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  transition: background .15s;
}
.round-btn .ico { font-size: 18px; }
.round-btn:hover { background: #2b3340; }
.round-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Action buttons */
.actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}
.action-btn {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 26px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .08s, filter .15s;
  box-shadow: var(--shadow);
}
.action-btn:active { transform: scale(0.92); }
.action-btn.call { background: var(--green); }
.action-btn.call:hover { background: var(--green-hover); }
.action-btn.answer { background: var(--green); animation: ring 1s infinite; }
.action-btn.hangup { background: var(--red); transform: rotate(135deg); }
.action-btn.hangup:hover { background: var(--red-hover); }
.action-btn.hangup:active { transform: rotate(135deg) scale(0.92); }
@keyframes ring { 0%,100%{transform:scale(1)} 50%{transform:scale(1.08)} }

/* Config overlay */
.config-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: stretch;
  z-index: 20;
}
.config-panel {
  background: var(--surface);
  width: 100%;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.config-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.config-header h2 { font-size: 16px; }
.config-form {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.config-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 13px;
  color: var(--text-dim);
}
.config-form label small { color: #6e7681; font-size: 11px; }
.config-form input {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
}
.config-form input:focus { border-color: var(--accent); }
.turn-fieldset {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.turn-fieldset legend { font-size: 12px; color: var(--text-dim); padding: 0 6px; }
.turn-fieldset small { color: #6e7681; }
.turn-creds { display: flex; gap: 8px; }
.turn-creds input { flex: 1; }
.config-note {
  font-size: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(210,153,34,.12);
  color: var(--amber);
  display: none;
}
.config-note.show { display: block; }
.config-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}
.btn-primary, .btn-secondary {
  flex: 1;
  padding: 12px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #2b3340; }

/* Log drawer */
.log-toggle {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 8px;
  width: 30px; height: 30px;
  cursor: pointer;
  z-index: 5;
}
.log-drawer {
  position: absolute;
  inset: auto 0 0 0;
  height: 45%;
  background: #0b0f14;
  border-top: 1px solid var(--border);
  z-index: 15;
  display: flex;
  flex-direction: column;
}
.log-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
}
.log-body {
  flex: 1;
  overflow-y: auto;
  padding: 10px 12px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11px;
  line-height: 1.5;
  color: #9ecbff;
  white-space: pre-wrap;
  word-break: break-word;
}
.log-body .err { color: var(--red-hover); }
.log-body .ok { color: var(--green-hover); }
.log-body .warn { color: var(--amber); }

/* Chamada recebida: realce visual pulsante enquanto toca */
@keyframes ring-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(37, 211, 102, .5); }
  70%  { box-shadow: 0 0 0 14px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}
body.ringing .call-info {
  border-radius: 14px;
  animation: ring-pulse 1.2s ease-out infinite;
}
body.ringing .action-btn.answer {
  animation: ring-pulse 1.2s ease-out infinite;
}
body.ringing .call-state { color: #25d366; font-weight: 600; }

/* Seção de configuração avançada (recolhível) */
.config-advanced {
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 10px;
  padding: 8px 12px;
  margin-top: 4px;
}
.config-advanced > summary {
  cursor: pointer;
  font-size: 13px;
  color: #9ecbff;
  user-select: none;
}
.config-advanced[open] > summary { margin-bottom: 10px; }