/* ========================================
   実績紹介セクション
   ======================================== */

.portfolio {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--color-darker) 0%, var(--color-dark) 100%);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* 実績カード */
.portfolio-card {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05) 0%, rgba(255, 165, 0, 0.05) 100%);
    border: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: 15px;
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.portfolio-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 15px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.3);
}

.portfolio-card:hover::before {
    opacity: 0.3;
}

/* カードヘッダー */
.portfolio-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.portfolio-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--color-dark);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

.portfolio-badge {
    background: rgba(255, 215, 0, 0.2);
    color: var(--color-primary);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    border: 1px solid var(--color-primary);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

/* カードタイトル */
.portfolio-card-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.portfolio-card-description {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

/* 特徴リスト */
.portfolio-features {
    margin-bottom: var(--spacing-md);
}

.portfolio-feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.95rem;
}

.portfolio-feature-item i {
    color: var(--color-primary);
    font-size: 1rem;
    flex-shrink: 0;
}

/* 制作のこだわり */
.portfolio-focus {
    background: rgba(255, 215, 0, 0.05);
    border-left: 3px solid var(--color-primary);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
}

.portfolio-focus-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.portfolio-focus-title i {
    font-size: 1.1rem;
}

.portfolio-focus-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.portfolio-focus-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.6rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.portfolio-focus-list li:before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.portfolio-focus-list li:last-child {
    margin-bottom: 0;
}

/* サイトリンク */
.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-dark);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.portfolio-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
}

/* CTAセクション */
.portfolio-cta {
    text-align: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, rgba(255, 165, 0, 0.1) 100%);
    border: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: 15px;
    margin-top: var(--spacing-lg);
}

.portfolio-cta-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

/* ========================================
   レスポンシブデザイン
   ======================================== */

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .portfolio-card {
        padding: var(--spacing-md);
    }
    
    .portfolio-card-title {
        font-size: 1.3rem;
    }
    
    .portfolio-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .portfolio-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .portfolio-badge {
        align-self: flex-end;
    }
}