/* Header Section */
header {
    text-align: center;
    padding: 40px 20px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

h1 {
    font-size: 2.5em;
    margin-bottom: 12px;
    color: #1a202c;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2em;
    color: #718096;
    margin-bottom: 8px;
}

.tagline {
    font-size: 1.1em;
    color: #667eea;
    font-weight: 600;
    margin-top: 16px;
}

/* Section Styles */
.section {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.section h2 {
    font-size: 1.8em;
    color: #1a202c;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-icon {
    font-size: 1.2em;
}

/* Introduction Section */
.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.intro-card {
    background: #f7fafc;
    padding: 24px;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.intro-card h3 {
    color: #1a202c;
    font-size: 1.2em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.intro-card p {
    color: #4a5568;
    line-height: 1.7;
}

/* Timeline Section */
.timeline {
    margin-top: 24px;
}

.timeline-item {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e2e8f0;
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-year {
    min-width: 80px;
    font-size: 1.1em;
    font-weight: 700;
    color: #667eea;
}

.timeline-content h3 {
    color: #1a202c;
    font-size: 1.1em;
    margin-bottom: 8px;
}

.timeline-content p {
    color: #718096;
    line-height: 1.6;
}

/* Interests Grid */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.interest-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 24px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.interest-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.interest-icon {
    font-size: 2.5em;
    margin-bottom: 12px;
}

.interest-card h3 {
    font-size: 1.3em;
    margin-bottom: 8px;
}

.interest-card p {
    opacity: 0.9;
    font-size: 0.95em;
}

/* Tech Stack Section */
.tech-category {
    margin-bottom: 32px;
}

.tech-category:last-child {
    margin-bottom: 0;
}

.tech-category h3 {
    color: #1a202c;
    font-size: 1.3em;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tech-tag {
    background: #eef2ff;
    color: #4338ca;
    padding: 10px 18px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
    transition: all 0.2s ease;
}

.tech-tag:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Current Activities Section */
.activities-list {
    margin-top: 24px;
}

.activity-item {
    background: #f7fafc;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 16px;
    display: flex;
    gap: 16px;
    align-items: start;
    transition: all 0.3s ease;
}

.activity-item:hover {
    background: #edf2f7;
    transform: translateX(4px);
}

.activity-icon {
    font-size: 2em;
    min-width: 50px;
    text-align: center;
}

.activity-content h3 {
    color: #1a202c;
    font-size: 1.2em;
    margin-bottom: 8px;
}

.activity-content p {
    color: #718096;
    line-height: 1.6;
}

/* Quote Section */
.quote-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    font-size: 1.3em;
    font-style: italic;
    margin-bottom: 30px;
}

.quote-author {
    margin-top: 16px;
    font-size: 0.8em;
    opacity: 0.9;
    font-style: normal;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    .profile-picture {
        width: 120px;
        height: 120px;
        font-size: 48px;
    }

    .intro-grid,
    .interests-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 24px;
    }

    .timeline-item {
        flex-direction: column;
        gap: 8px;
    }

    .timeline-year {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    header {
        padding: 24px 16px;
    }

    .profile-picture {
        width: 100px;
        height: 100px;
        font-size: 40px;
    }

    h1 {
        font-size: 1.75em;
    }

    .section {
        padding: 20px;
    }
}