:root {
  --bg: #0f1216;
  --card: #181d24;
  --line: #2a323d;
  --text: #eef2f6;
  --muted: #8d99a8;
  --green: #22a565;
  --red: #d9483b;
  --accent: #4c8dff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, 'Segoe UI', sans-serif;
}

.card {
  width: 100%;
  max-width: 340px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card[hidden] {
  display: none;
}

h1 {
  margin: 0 0 4px;
  font-size: 20px;
}

label {
  color: var(--muted);
  font-size: 14px;
}

header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

header .link {
  margin-left: auto;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--red);
}

.dot.online {
  background: var(--green);
}

input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

#number {
  font-size: 24px;
  text-align: center;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

input:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.status {
  margin: 0;
  min-height: 1.4em;
  text-align: center;
  color: var(--muted);
}

.error {
  margin: 0;
  min-height: 1.4em;
  color: var(--red);
  font-size: 14px;
}

.pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

button {
  border: 0;
  border-radius: 14px;
  padding: 14px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--line);
  cursor: pointer;
}

.pad button {
  font-size: 22px;
  padding: 16px 0;
}

button:active:not(:disabled) {
  filter: brightness(1.25);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.primary {
  background: var(--accent);
}

.call {
  background: var(--green);
}

.hangup {
  background: var(--red);
}

.link {
  background: none;
  padding: 4px;
  color: var(--muted);
  font-weight: 400;
  font-size: 14px;
  text-decoration: underline;
}

details {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  font-size: 14px;
}

summary {
  cursor: pointer;
  color: var(--muted);
}

dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  margin: 10px 0;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  overflow-wrap: anywhere;
}

details .actions button {
  font-size: 13px;
  padding: 10px 6px;
}

details .status {
  font-size: 13px;
  margin-top: 8px;
}

.banner {
  margin: 10px 0 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: #4a3a12;
  color: #ffd98a;
}

.warn {
  color: #ffb454;
}

.bad {
  color: #ff7b6e;
}

.good {
  color: #5fd39a;
}