/* ===================================
   Skills CSS - Skills 섹션 스타일
   =================================== */

.skills-section {
    padding: 100px 0 70px;
    background: var(--dark);
    min-height: 100vh;
    max-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

/* ===================================
   Filter Buttons
   =================================== */

.skills-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.filter-btn {
    padding: 9px 22px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: var(--gray-light);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.2);
}

.filter-btn.active {
    background: var(--gradient);
    color: var(--white);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* ===================================
   Skills Grid
   =================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
    max-width: 1050px;
    margin: 0 auto;
}

/* ===================================
   Skill Item
   =================================== */

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 18px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.skill-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--primary);
    transform: translateY(-5px);
}

.skill-item .skill-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.skill-item .skill-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

.skill-item:hover .skill-icon img {
    transform: scale(1.1);
}

.skill-item .skill-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
    text-align: center;
}

/* ===================================
   Filter States - Active & Inactive
   =================================== */

.skill-item.active {
    opacity: 1;
    transform: translateY(0);
}

.skill-item.active:hover {
    transform: translateY(-5px);
}

.skill-item.inactive {
    opacity: 0.2;
    pointer-events: none;
}

.skill-item.inactive .skill-icon img {
    filter: grayscale(100%);
    opacity: 0.5;
}

.skill-item.inactive .skill-name {
    color: var(--gray);
}

/* ===================================
   Responsive - Skills
   =================================== */

@media (max-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .skills-filter {
        gap: 8px;
        margin-bottom: 40px;
    }
    
    .filter-btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    
    .skill-item {
        padding: 20px 16px;
    }
    
    .skill-item .skill-icon {
        width: 52px;
        height: 52px;
        font-size: 1.5rem;
    }
    
    .skill-item .skill-name {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .skills-filter {
        gap: 6px;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .skill-item {
        padding: 18px 12px;
    }
    
    .skill-item .skill-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
        border-radius: 12px;
    }
    
    .skill-item .skill-name {
        font-size: 0.75rem;
    }
}