:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-border: #e3e5ea;
  --text: #1c1f24;
  --muted: #6a7280;
  --accent: #2f6feb;
  --accent-contrast: #ffffff;
  --danger: #c13838;
  --ok: #1f8a4c;
  --warn: #b9741d;
  --error: #b4231a;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1c2026;
    --panel-border: #2a2f37;
    --text: #e6e8ec;
    --muted: #9aa2ad;
    --accent: #4f8bff;
    --accent-contrast: #0b0d10;
    --danger: #e5625a;
    --ok: #5bd28c;
    --warn: #e5b061;
    --error: #ff7a6c;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

main {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

main[hidden] { display: none; }

main.login {
  min-height: 80vh;
  justify-content: center;
}

main.login h1 {
  font-size: 22px;
  margin: 0 0 16px;
}

.login-error {
  color: var(--error);
  font-size: 13px;
  margin-top: -4px;
}

.hint {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin: 4px 0 0;
}

.hint a { color: var(--muted); }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 36px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2px;
  margin: 8px 0 4px;
}

.brand-name {
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1;
  color: var(--text);
  text-align: center;
}

.brand-logo {
  width: 64px;
  height: 64px;
  display: block;
  margin-top: 2px;
}

@media (prefers-color-scheme: dark) {
  .brand-logo { filter: invert(1) hue-rotate(180deg); }
}

h1 {
  font-size: 20px;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 12px;
  font-weight: 600;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.card.hidden { display: none; }

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

label span em {
  font-style: normal;
  color: var(--muted);
  opacity: 0.7;
}

label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
}

input[type="text"],
input[type="url"],
input[type="password"] {
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: transparent;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

button {
  flex: 1;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
}

button:hover:not(:disabled) { border-color: var(--muted); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

button[type="submit"],
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.icon-btn {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--muted);
}

.icon-btn:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--muted);
}

#ringerMuteBtn .bell-off { display: none; }
#ringerMuteBtn.muted .bell-on { display: none; }
#ringerMuteBtn.muted .bell-off { display: block; }
#ringerMuteBtn.muted { color: var(--muted); border-style: dashed; }

.status {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status.ok { color: var(--ok); border-color: var(--ok); }
.status.warn { color: var(--warn); border-color: var(--warn); }
.status.error { color: var(--error); border-color: var(--error); }
.status.info { color: var(--accent); border-color: var(--accent); }
.status.disconnected { color: var(--muted); }

/* Idle (registered) view */
.card.idle {
  text-align: center;
  padding: 32px 20px;
}

.idle-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 6px;
  min-height: 14px;
}

.idle-number {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.01em;
  word-break: break-all;
}

.link-btn {
  flex: 0 0 auto;
  display: inline-block;
  margin-top: 12px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  cursor: pointer;
}

.link-btn:hover:not(:disabled) { border-color: var(--accent); }

.link-btn[hidden] { display: none; }

/* Settings / account panel */
.info-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 14px;
}

.info-row:last-of-type { border-bottom: none; }

.info-row span {
  color: var(--muted);
}

.info-row strong {
  font-weight: 600;
  color: var(--text);
  text-align: right;
  word-break: break-all;
  margin-left: 12px;
}

/* Incoming / active call view */
.card.call {
  text-align: center;
  padding: 28px 20px;
}

.call-state {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 8px;
}

.call-number {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 24px;
  word-break: break-all;
}

.call-actions {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.phone-btn {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  padding: 0;
  border-radius: 50%;
  border: none;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: transform 0.08s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.phone-btn[hidden] { display: none; }

/* Child SVGs must not absorb clicks meant for the button. */
.phone-btn svg { pointer-events: none; }
.icon-btn svg { pointer-events: none; }

.phone-btn:hover:not(:disabled) {
  filter: brightness(1.08);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.phone-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.phone-btn.answer {
  background: #1f8a4c;
  animation: phone-pulse 1.6s ease-in-out infinite;
}

.phone-btn.reject {
  background: #c13838;
}

@keyframes phone-pulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(31, 138, 76, 0.35), 0 0 0 0 rgba(31, 138, 76, 0.5); }
  50%      { box-shadow: 0 4px 12px rgba(31, 138, 76, 0.35), 0 0 0 12px rgba(31, 138, 76, 0); }
}

audio { display: none; }