:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1a2533;
  --muted: #4c5d73;
  --accent: #0d9488;
  --accent-hover: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(160deg, #ecfeff 0%, var(--bg) 60%, #fefce8 100%);
  color: var(--text);
}

.container {
  width: min(680px, calc(100% - 2rem));
  background: var(--card);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.08);
  text-align: center;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  line-height: 1.6;
}

.button {
  display: inline-block;
  text-decoration: none;
  background: var(--accent);
  color: #ffffff;
  padding: 0.75rem 1.1rem;
  border-radius: 10px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.button:hover {
  background: var(--accent-hover);
}