:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8eef4;
  --muted: #8b9cb3;
  --accent: #ff6b35;
  --accent-hover: #ff8555;
  --secondary: #2d3a4f;
  --border: #3a4a63;
  --input-bg: #121a26;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #1e2a3a, var(--bg));
  color: var(--text);
}

.card {
  width: min(420px, 92vw);
  padding: 2rem;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--accent);
}

h1 {
  margin: 0.4rem 0 0.5rem;
  font-size: 1.75rem;
}

.subtitle {
  margin: 0 0 1.5rem;
  color: var(--muted);
  line-height: 1.5;
}

.lang-panel,
.call-panel {
  margin: 0 0 1.25rem;
}

.lang-label {
  margin: 0 0 0.65rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lang-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.lang-btn {
  appearance: none;
  -webkit-appearance: none;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.lang-btn:hover {
  border-color: var(--accent);
}

.lang-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  margin: 0.5rem 0;
  padding: 1rem 1.25rem;
  border: none;
  border-radius: 12px;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  color: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(.is-disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--secondary);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  filter: brightness(1.08);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}

.status {
  min-height: 1.25rem;
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hint {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.4;
}

.error {
  margin-top: 1rem;
  color: #ff8a8a;
  font-size: 0.9rem;
  line-height: 1.4;
}