body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin: 0;
    padding: 20px;
    color: #333;
}

.main-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 2rem;
    color: #0056b3;
}

.page-header span {
    font-size: 1.2rem;
    color: #666;
}

.back-link {
    text-decoration: none;
    color: #0077ff;
    font-size: 0.9rem;
}

/* フィルターボタン */
.filter-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.filter-btn {
    padding: 10px 20px;
    border: none;
    background: #fff;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: 0.3s;
}

.filter-btn.active {
    background: #0077ff;
    color: #fff;
}

/* 不具合カード */
.bug-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-left: 6px solid #ccc;
    animation: fadeIn 0.5s ease forwards;
}

.bug-card.status-未解決 { border-left-color: #ff4757; }
.bug-card.status-修正済 { border-left-color: #2ed573; }

.bug-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.status-tag {
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    background: #eee;
    font-weight: bold;
}

.bug-title {
    font-size: 1.15rem;
    font-weight: bold;
}

.bug-desc, .bug-sol {
    font-size: 0.95rem;
    margin-top: 10px;
}

.bug-sol {
    background: #f0f9ff;
    padding: 10px;
    border-radius: 6px;
    border: 1px dashed #0077ff;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}