/* Tech Stack Styles */
.tech-stack-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    padding: 8px 0;
}

.tech-category {
    background: linear-gradient(135deg, rgba(138, 100, 255, 0.1), rgba(88, 50, 200, 0.05));
    border: 1px solid rgba(138, 100, 255, 0.2);
    border-radius: 12px;
    padding: 14px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tech-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #8a64ff, #5832c8, #a78bfa);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tech-category:hover {
    transform: translateY(-3px);
    border-color: rgba(138, 100, 255, 0.4);
    box-shadow: 0 6px 20px rgba(138, 100, 255, 0.15);
}

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

.tech-category-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.tech-category-icon {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: linear-gradient(135deg, #8a64ff, #5832c8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: white;
}

.tech-category-title {
    font-family: 'Montserrat', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: var(--heading-color);
    margin: 0;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-color);
}

.tech-item:hover {
    background: rgba(138, 100, 255, 0.2);
    border-color: rgba(138, 100, 255, 0.4);
    transform: scale(1.05);
}

.tech-item-icon {
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-item-icon img {
    width: 14px;
    height: 14px;
    object-fit: contain;
}

.tech-item-name {
    font-size: 11px;
    font-weight: 500;
}

/* Individual tech colors on hover */
.tech-item[data-tech="python"]:hover { border-color: #3776AB; box-shadow: 0 0 15px rgba(55, 118, 171, 0.3); }
.tech-item[data-tech="javascript"]:hover { border-color: #F7DF1E; box-shadow: 0 0 15px rgba(247, 223, 30, 0.3); }
.tech-item[data-tech="pytorch"]:hover { border-color: #EE4C2C; box-shadow: 0 0 15px rgba(238, 76, 44, 0.3); }
.tech-item[data-tech="fastapi"]:hover { border-color: #009688; box-shadow: 0 0 15px rgba(0, 150, 136, 0.3); }
.tech-item[data-tech="html"]:hover { border-color: #E34F26; box-shadow: 0 0 15px rgba(227, 79, 38, 0.3); }
.tech-item[data-tech="css"]:hover { border-color: #1572B6; box-shadow: 0 0 15px rgba(21, 114, 182, 0.3); }
.tech-item[data-tech="latex"]:hover { border-color: #008080; box-shadow: 0 0 15px rgba(0, 128, 128, 0.3); }
.tech-item[data-tech="mysql"]:hover { border-color: #4479A1; box-shadow: 0 0 15px rgba(68, 121, 161, 0.3); }
.tech-item[data-tech="postgresql"]:hover { border-color: #4169E1; box-shadow: 0 0 15px rgba(65, 105, 225, 0.3); }
.tech-item[data-tech="neo4j"]:hover { border-color: #008CC1; box-shadow: 0 0 15px rgba(0, 140, 193, 0.3); }
.tech-item[data-tech="siemens"]:hover { border-color: #009999; box-shadow: 0 0 15px rgba(0, 153, 153, 0.3); }

/* Light mode adjustments */
body.light-mode .tech-category {
    background: linear-gradient(135deg, rgba(138, 100, 255, 0.08), rgba(88, 50, 200, 0.03));
}

body.light-mode .tech-item {
    background: rgba(0, 0, 0, 0.03);
}

body.light-mode .tech-item:hover {
    background: rgba(138, 100, 255, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    .tech-stack-container {
        grid-template-columns: 1fr;
    }
    
    .tech-category {
        padding: 14px;
    }
}