/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.about-bio {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
    text-align: justify;
    text-align-last: left;
}

/* Mobile-specific about bio alignment */
@media (max-width: 767.98px) {
    .about-bio {
        text-align: justify;
        text-align-last: justify;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--accent-primary);
    font-size: var(--font-size-lg);
    width: 20px;
}

.about-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.social-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: 0 8px 25px var(--shadow-color);
    color: var(--accent-primary);
}

.social-card i {
    font-size: var(--font-size-xl);
    color: var(--accent-primary);
}

/* Tech Stack Section */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-align: center;
}

.tech-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.tech-item i {
    font-size: 2rem;
    color: var(--accent-primary);
}

.tech-item span {
    font-weight: 500;
    color: var(--text-primary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.skill-category:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.skill-category-title {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.skill-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-chip {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-2xl);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.skill-chip:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 15px 40px var(--shadow-color);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-header {
    margin-bottom: var(--spacing-md);
}

.project-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.project-status {
    display: inline-block;
    background: var(--accent-secondary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-2xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.project-status.unstable {
    background: #ef4444;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    text-align: justify;
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* Research Section */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.research-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.research-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.research-header {
    margin-bottom: var(--spacing-md);
}

.research-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.research-type {
    display: inline-block;
    background: var(--accent-tertiary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-2xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.research-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    text-align: justify;
}

.research-links {
    display: flex;
    gap: var(--spacing-md);
}

.research-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.research-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

.article-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.article-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

.article-link:hover {
    color: var(--accent-secondary);
    background: rgba(6, 182, 212, 0.1);
    transform: translateX(5px);
}

/* Experience Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    margin-top: var(--spacing-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    padding-left: 60px;
}

.timeline-marker {
    position: absolute;
    left: 11px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--accent-primary);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    transition: all var(--transition-fast);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.timeline-content:hover {
    transform: translateX(5px);
    border-color: var(--accent-primary);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.timeline-header {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.timeline-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
    flex: 1;
    min-width: 0;
}

.timeline-company {
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.timeline-period {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-align: right;
    white-space: nowrap;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    text-align: justify;
}

.timeline-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.timeline-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* Education Section */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.education-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.education-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.education-header {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.education-degree {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
    flex: 1;
    min-width: 0;
}

.education-school {
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.education-period {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-align: right;
    white-space: nowrap;
}

.education-location {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.education-specialization {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    text-align: justify;
}

.education-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.education-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.certification-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.certification-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.certification-header {
    margin-bottom: var(--spacing-md);
}

.certification-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.certification-issuer {
    color: var(--accent-primary);
    font-weight: 600;
}

.certification-id {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.certification-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.certification-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* Support Section */
/* .support-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.support-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.support-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.support-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.support-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-normal);
}

.support-btn:hover::before {
    left: 100%;
}

.support-btn.coffee {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.support-btn.coffee:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

.support-btn.kofi {
    background: linear-gradient(135deg, #29abe0, #1e88e5);
    color: white;
    box-shadow: 0 4px 15px rgba(41, 171, 224, 0.3);
}

.support-btn.kofi:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(41, 171, 224, 0.4);
} */

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Tooltip */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    text-align: center;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity var(--transition-fast);
    font-size: var(--font-size-sm);
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--bg-tertiary) transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    /* Ensure it doesn't overlap with footer */
    margin-bottom: 0;
}

.back-to-top:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.4);
}

.back-to-top.show {
    display: flex;
}

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    z-index: 999; /* Reduced to avoid conflict with theme toggle */
    transition: width 0.1s ease;
    pointer-events: none; /* Ensure it doesn't interfere with interactions */
}