* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', sans-serif; background: #f5f5f5; color: #333; }

/* Header */
.o-header-member { background: #1a1a2e; color: #fff; padding: 0 16px; }
.o-header-member__inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 56px; }
.a-header-member-logo a { color: #ff6b35; font-weight: bold; font-size: 20px; text-decoration: none; }
.header-nav { display: flex; gap: 16px; align-items: center; font-size: 14px; }
.header-nav a { color: #ccc; text-decoration: none; }
.header-nav a:hover { color: #ff6b35; }
.header-user { color: #ff6b35; font-weight: bold; }
.logout-link { color: #888 !important; font-size: 12px; }

/* Footer */
.o-footer-member { background: #1a1a2e; color: #888; text-align: center; padding: 20px; font-size: 12px; margin-top: 40px; }

/* Auth */
.auth-container { max-width: 400px; margin: 60px auto; background: #fff; padding: 40px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.auth-container h1 { margin-bottom: 24px; text-align: center; color: #1a1a2e; }
.auth-form .form-group { margin-bottom: 16px; }
.auth-form label { display: block; margin-bottom: 4px; font-size: 14px; color: #666; }
.auth-form input { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 16px; }
.auth-link { text-align: center; margin-top: 16px; font-size: 14px; color: #666; }
.auth-link a { color: #ff6b35; }

/* Buttons */
.btn-primary { display: inline-block; background: #ff6b35; color: #fff; border: none; padding: 12px 24px; border-radius: 4px; font-size: 16px; cursor: pointer; text-decoration: none; }
.btn-primary:hover { background: #e55a2b; }
.btn-primary:disabled { background: #ccc; cursor: not-allowed; }
.btn-secondary { display: inline-block; background: #1a1a2e; color: #fff; border: none; padding: 12px 24px; border-radius: 4px; font-size: 16px; cursor: pointer; text-decoration: none; }
.btn-cart { background: #ff6b35; color: #fff; border: none; padding: 8px 16px; border-radius: 4px; cursor: pointer; font-size: 13px; }
.btn-cart:hover { background: #e55a2b; }
.btn-danger { background: #dc3545; color: #fff; border: none; padding: 4px 12px; border-radius: 4px; cursor: pointer; }
.btn-small { font-size: 12px; }
.btn-large { font-size: 18px; padding: 14px 32px; }
.error-msg { background: #fee; color: #c00; padding: 12px; border-radius: 4px; margin-bottom: 16px; border: 1px solid #fcc; }

/* Store */
.store-container { max-width: 1200px; margin: 20px auto; padding: 0 16px; }
.store-container h1 { margin-bottom: 20px; color: #1a1a2e; }
.search-form { display: flex; gap: 8px; margin-bottom: 24px; }
.search-form input { flex: 1; padding: 10px; border: 1px solid #ddd; border-radius: 4px; font-size: 16px; }
.search-form button { padding: 10px 20px; background: #1a1a2e; color: #fff; border: none; border-radius: 4px; cursor: pointer; }
.search-result { margin-bottom: 16px; color: #666; }
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.book-card { background: #fff; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.book-cover { background: #e8e0f0; height: 120px; display: flex; align-items: center; justify-content: center; font-size: 48px; }
.book-info { padding: 16px; }
.book-info h3 { font-size: 16px; margin-bottom: 4px; }
.book-info h3 a { color: #1a1a2e; text-decoration: none; }
.book-info h3 a:hover { color: #ff6b35; }
.book-author { font-size: 13px; color: #888; margin-bottom: 8px; }
.book-price { font-size: 18px; font-weight: bold; color: #ff6b35; margin-bottom: 4px; }
.book-cashback { font-size: 12px; color: #28a745; margin-bottom: 12px; }
.no-results { text-align: center; color: #888; padding: 40px; }

/* Book Detail */
.book-detail { max-width: 800px; margin: 40px auto; padding: 0 16px; display: flex; gap: 32px; }
.book-detail__cover { background: #e8e0f0; width: 250px; height: 350px; display: flex; align-items: center; justify-content: center; font-size: 64px; border-radius: 8px; flex-shrink: 0; }
.book-detail__info h1 { font-size: 24px; margin-bottom: 12px; color: #1a1a2e; }
.book-detail__info .book-author { font-size: 16px; margin-bottom: 8px; }
.book-detail__info .book-category { font-size: 14px; color: #888; margin-bottom: 20px; }
.price-box { background: #fff8f0; border: 2px solid #ff6b35; border-radius: 8px; padding: 20px; margin-bottom: 20px; }
.book-price-large { font-size: 28px; font-weight: bold; color: #ff6b35; margin-bottom: 8px; }
.back-link { display: block; max-width: 800px; margin: 20px auto; padding: 0 16px; color: #ff6b35; }

/* Cart */
.cart-container { max-width: 800px; margin: 40px auto; padding: 0 16px; }
.cart-container h1 { margin-bottom: 20px; color: #1a1a2e; }
.cart-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.cart-table th { background: #1a1a2e; color: #fff; padding: 12px; text-align: left; font-size: 14px; }
.cart-table td { padding: 12px; border-bottom: 1px solid #eee; }
.cart-summary { margin-top: 24px; text-align: right; }
.cart-total { font-size: 24px; margin-bottom: 8px; }
.cart-balance { font-size: 14px; color: #666; margin-bottom: 16px; }

/* Checkout */
.checkout-container { max-width: 600px; margin: 60px auto; padding: 0 16px; text-align: center; }
.checkout-container h1 { color: #28a745; margin-bottom: 20px; }
.order-summary { background: #fff; padding: 32px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); margin-bottom: 24px; }
.order-table { width: 100%; margin-top: 16px; }
.order-table td { padding: 8px; text-align: left; border-bottom: 1px solid #eee; }
.order-table td:last-child { text-align: right; font-weight: bold; }
.checkout-links { display: flex; gap: 12px; justify-content: center; }

/* Coin Page */
.coin-summary { background: #fff; padding: 32px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); margin-bottom: 24px; text-align: center; }
.coin-summary__title { color: #1a1a2e; margin-bottom: 16px; font-size: 18px; }
.coin-summary__total { font-size: 48px; font-weight: bold; color: #ff6b35; margin-bottom: 16px; }
.coin-icon { font-size: 40px; }
.coin-amount { margin: 0 8px; }
.coin-unit { font-size: 20px; color: #666; }
.coin-breakdown { display: flex; justify-content: center; gap: 40px; }
.coin-breakdown__item { text-align: center; }
.coin-breakdown__item .label { display: block; font-size: 13px; color: #888; margin-bottom: 4px; }
.coin-breakdown__item .value { font-size: 18px; font-weight: bold; }

.coin-expiry, .coin-history { background: #fff; padding: 24px; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); margin-bottom: 24px; }
.coin-expiry h3, .coin-history h3 { color: #1a1a2e; margin-bottom: 16px; }
.coin-expiry__table, .coin-history__table { width: 100%; border-collapse: collapse; }
.coin-expiry__table th, .coin-history__table th { background: #f8f8f8; padding: 10px; text-align: left; font-size: 13px; color: #666; border-bottom: 2px solid #eee; }
.coin-expiry__table td, .coin-history__table td { padding: 10px; border-bottom: 1px solid #f0f0f0; font-size: 14px; }
.coin-positive { color: #28a745; font-weight: bold; }
.coin-negative { color: #dc3545; font-weight: bold; }
.coin-history__filter { margin-bottom: 16px; }
.coin-history__filter select { padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; }
.no-history { text-align: center; color: #888; padding: 20px; }

#main-contents { max-width: 800px; margin: 20px auto; padding: 0 16px; }