:root {
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}

.column {
  width: 100%;
  max-width: 440px;
  text-align: center;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 3vw, 2rem);
  line-height: 1.2;
}

.subtitle {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.5;
}

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

.button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 54px;
  padding: 12px 16px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.button-default {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

.button-default:hover,
.button-default:focus-visible {
  background: var(--card);
  color: var(--text);
  border-color: var(--border-hover);
}