* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #f4f7fb, #dfe9f3);
  color: #1f2937;
  min-height: 100vh;
}

.container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  background: #ffffff;
  padding: 40px 32px;
  max-width: 700px;
  width: 100%;
  text-align: center;
  border-radius: 18px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 20px;
  color: #0f172a;
}

.notice {
  font-size: 1.2rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.contact-text {
  font-size: 1rem;
  margin-bottom: 12px;
  color: #4b5563;
}

.phone {
  display: inline-block;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: bold;
  color: #ffffff;
  background: #2563eb;
  padding: 14px 24px;
  border-radius: 12px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.phone:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
}

@media (max-width: 600px) {
  .card {
    padding: 28px 20px;
  }

  h1 {
    font-size: 1.8rem;
  }

  .notice {
    font-size: 1.05rem;
  }

  .phone {
    font-size: 1.15rem;
    padding: 12px 18px;
  }
}