:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #1f2430;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --secondary: #eef1f6;
  --secondary-ink: #1f2430;
  --border: #e2e5ea;
  --focus: #93c5fd;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 36px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 1px 2px rgba(20, 22, 30, 0.04), 0 12px 32px rgba(20, 22, 30, 0.06);
  text-align: center;
}

.brand-logo {
  display: block;
  max-width: 180px;
  width: 100%;
  height: auto;
  margin: 0 auto 32px;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 18px 20px;
  border-radius: 14px;
  text-decoration: none;
  font-size: 17px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background: #1d4ed8;
}

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

.btn-secondary:hover {
  background: #e3e7ee;
}

.btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

@media (max-width: 420px) {
  .panel {
    padding: 36px 24px;
    border-radius: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
}