/* Skills Section */
.skills {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
    position: relative;
}

.skills::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 102, 0, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 102, 0, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 2;
}

/* Skill Category */
.skill-category {
    background: rgba(34, 34, 34, 0.4);
    border: 1px solid rgba(255, 102, 0, 0.1);
    padding: var(--spacing-xl);
    position: relative;
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 15px 100%, 0 calc(100% - 15px));
    transition: all var(--transition-normal);
    backdrop-filter: blur(5px);
}

.skill-category:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 102, 0, 0.3);
    box-shadow: 0 10px 30px rgba(255, 102, 0, 0.1);
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 102, 0, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    clip-path: inherit;
}

.skill-category:hover::before {
    opacity: 1;
}

/* Category Header */
.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 102, 0, 0.2);
}

.category-icon {
    width: 32px;
    height: 32px;
    position: relative;
    flex-shrink: 0;
}

.category-title {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--accent-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Category Icons */
.certificate-icon::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 18px;
    border: 2px solid var(--accent-orange);
    border-radius: 3px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.certificate-icon::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-orange);
    border-radius: 50%;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.knowledge-icon::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-orange);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.knowledge-icon::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-orange);
    clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.software-icon::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 18px;
    border: 2px solid var(--accent-orange);
    border-radius: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.software-icon::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 2px;
    background: var(--accent-orange);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 -4px 0 var(--accent-orange), 0 4px 0 var(--accent-orange);
}

.office-icon::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 24px;
    border: 2px solid var(--accent-orange);
    border-radius: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.office-icon::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 2px;
    background: var(--accent-orange);
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 4px 0 var(--accent-orange), 0 8px 0 var(--accent-orange);
}

/* Skill List */
.skill-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skill-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all var(--transition-normal);
}

.skill-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7em;
    width: 8px;
    height: 8px;
    background: var(--accent-orange);
    clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
    transform: translateY(-50%);
}

.skill-list li:hover {
    color: var(--accent-orange);
    transform: translateX(8px);
    padding-left: calc(var(--spacing-lg) + 8px);
}

.skill-list li:hover::before {
    transform: translateY(-50%) scale(1.2);
}

/* Software Items */
.software-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.software-icon {
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
}

/* Software Specific Icons */
.pkpm-icon::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-orange);
    clip-path: polygon(0 0, 80% 0, 100% 20%, 100% 100%, 0 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.midas-icon::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-orange);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.midas-icon::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-orange);
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.cad-icon::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 12px;
    border: 2px solid var(--accent-orange);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.cad-icon::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2px;
    background: var(--accent-orange);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 -3px 0 var(--accent-orange), 0 3px 0 var(--accent-orange);
}

.wps-icon::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 16px;
    border: 2px solid var(--accent-orange);
    border-radius: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.wps-icon::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2px;
    background: var(--accent-orange);
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 3px 0 var(--accent-orange), 0 6px 0 var(--accent-orange);
}

/* Hover Effects for Software Items */
.software-item:hover .software-icon {
    transform: scale(1.2) rotate(5deg);
    transition: transform var(--transition-normal);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .skill-category {
        padding: var(--spacing-lg);
        clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
    }
    
    .category-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .category-title {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .skill-category {
        padding: var(--spacing-md);
    }
    
    .category-title {
        font-size: var(--font-size-base);
    }
    
    .skill-list li {
        font-size: var(--font-size-sm);
        padding-left: var(--spacing-md);
    }
}

/* Animation on Scroll */
.skill-category {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.skill-category.animate {
    opacity: 1;
    transform: translateY(0);
}

.skill-category:nth-child(1) {
    transition-delay: 0.1s;
}

.skill-category:nth-child(2) {
    transition-delay: 0.2s;
}

.skill-category:nth-child(3) {
    transition-delay: 0.3s;
}

.skill-category:nth-child(4) {
    transition-delay: 0.4s;
}

/* Enhanced Visual Effects */
.skill-category:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
    transition: transform var(--transition-normal);
}

.skill-category:hover .category-title {
    color: #ff8533;
    transition: color var(--transition-normal);
}

/* Loading States */
.skill-list li {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.skill-list li:nth-child(1) { animation-delay: 0.1s; }
.skill-list li:nth-child(2) { animation-delay: 0.2s; }
.skill-list li:nth-child(3) { animation-delay: 0.3s; }
.skill-list li:nth-child(4) { animation-delay: 0.4s; }
.skill-list li:nth-child(5) { animation-delay: 0.5s; }

/* Geometric Decorations */
.skills::after {
    content: '';
    position: absolute;
    top: 20%;
    right: 5%;
    width: 100px;
    height: 100px;
    border: 1px solid rgba(255, 102, 0, 0.1);
    clip-path: polygon(0 0, 80% 0, 100% 20%, 100% 100%, 20% 100%, 0 80%);
    transform: rotate(30deg);
    z-index: 1;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: rotate(30deg) translateY(0);
    }
    50% {
        transform: rotate(30deg) translateY(-20px);
    }
}