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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f7fa;
    color: #2d3748;
}

/* ===== ヘッダー（モスグリーン） ===== */
.header {
    background: #8A9A5B; /* メインカラー */
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ===== ログアウトボタン（モスグリーン系に変更） ===== */
.logout-btn {
    background: #65743A; /* 濃いモスグリーン */
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

.logout-btn:hover {
    background: #4f5b2d;
}

/* ===== コンテナ ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* ===== ウェルカムカード ===== */
.welcome {
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.welcome h2 {
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.welcome p {
    color: #718096;
}

/* ===== ダッシュボードグリッド ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card h3 {
    color: #2d3748;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
}

/* ===== 統計カード ===== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 0.375rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #8A9A5B; /* モスグリーン */
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: #718096;
}

/* ===== アクティビティ ===== */
.activity-list {
    list-style: none;
}

.activity-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-desc {
    font-weight: 500;
}

.activity-time {
    font-size: 0.875rem;
    color: #718096;
}

/* ===== ボタン ===== */
.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.2s;
}

.btn-primary {
    background: #8A9A5B; /* モスグリーン */
    color: white;
}

.btn-primary:hover {
    background: #65743A; /* 濃いモスグリーン */
}

.btn-secondary {
    background: #e2e8f0;
    color: #2d3748;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .container {
        padding: 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}