:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #e9f5f4 0%, var(--bg) 45%);
}

.container {
  width: min(92vw, 560px);
  background: var(--card);
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 12px 30px rgba(15, 118, 110, 0.12);
}

h1 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.4rem;
}

.button {
  display: inline-block;
  text-decoration: none;
  color: #ffffff;
  background: var(--accent);
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-weight: 600;
}

.button:hover {
  filter: brightness(1.07);
}