/* 基本排版 */
body {
  font-family: Arial, "Microsoft JhengHei", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f7fa;
  color: #333;
}

header {
  background-color: #2c3e50;
  color: #ecf0f1;
  padding: 1rem 2rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
}

header p {
  margin: 0;
  font-size: 1rem;
}

section {
  padding: 2rem;
  margin: 1rem auto;
  max-width: 900px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

section h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: #34495e;
}

.card {
  background: #fdfdfd;
  border: 1px solid #e1e4e8;
  border-radius: 6px;
  padding: 1rem;
  text-align: center;
}

.card-body {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card .value {
  font-size: 2.5rem;
  font-weight: bold;
  margin: 0;
  color: #e74c3c;
}

.card .classification {
  font-size: 1.2rem;
  margin: 0.5rem 0;
}

.card .update-info {
  font-size: 0.8rem;
  color: #7f8c8d;
}

.chart-container {
  position: relative;
  height: 300px;
  width: 100%;
  margin-top: 1rem;
}

/* Crypto grid */
.crypto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.crypto-card {
  background: #fdfdfd;
  border: 1px solid #e1e4e8;
  border-radius: 6px;
  padding: 1rem;
  text-align: center;
}

.crypto-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  color: #2c3e50;
}

.crypto-card .price {
  font-size: 1.4rem;
  margin: 0.5rem 0;
}

.crypto-card .rsi {
  font-size: 0.9rem;
  color: #7f8c8d;
}

.crypto-card .recommendation {
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* 表格呈現主要幣種 */
.crypto-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}
.crypto-table th,
.crypto-table td {
  border: 1px solid #e1e4e8;
  padding: 0.5rem;
  text-align: center;
}
.crypto-table thead {
  background-color: #f0f3f6;
  font-weight: bold;
}

.btn {
  display: inline-block;
  background-color: #3498db;
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.btn:hover {
  background-color: #2980b9;
}

/* 分析表格樣式 */
table.analysis-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

table.analysis-table th,
table.analysis-table td {
  border: 1px solid #e1e4e8;
  padding: 0.4rem;
  text-align: center;
  font-size: 0.85rem;
}

table.analysis-table thead {
  background-color: #f0f3f6;
  font-weight: bold;
}

/* 響應式 */
@media (max-width: 600px) {
  header h1 {
    font-size: 1.5rem;
  }
  section {
    padding: 1rem;
  }
}