* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f3f4f6;
  color: #111827;
}

header {
  background: #111827;
  color: white;
  padding: 25px 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 28px;
}

header p {
  margin-top: 5px;
  opacity: 0.7;
}

main {
  max-width: 600px;
  margin: auto;
  padding: 16px;
}

.card {
  background: white;
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 14px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.06);
}

.card h2 {
  margin-top: 0;
  font-size: 19px;
}

.date {
  color: #6b7280;
}

.special {
  font-size: 35px;
  font-weight: bold;
  text-align: center;
  margin: 20px 0;
}

.prediction {
  text-align: center;
}

.pair {
  display: block;
  font-size: 32px;
  font-weight: bold;
  margin: 15px;
}

button {
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-size: 16px;
  margin: 5px 0;
  cursor: pointer;
}

.card button {
  background: #111827;
  color: white;
}

.menu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.menu button {
  background: white;
  color: #111827;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

#result {
  padding-top: 15px;
  text-align: center;
}