/* ============================================
   MINIMAL CLEAN DESIGN
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   Hero Image Section
   ============================================ */

.hero-image {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* ============================================
   Main Content
   ============================================ */

.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 40px;
}

.container {
    width: 100%;
}

/* ============================================
   Name and Bio
   ============================================ */

.name {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
    color: var(--color-text);
}

/* ============================================
   Social Links
   ============================================ */

.social-links {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-text);
    font-size: 20px;
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    transition: all 0.2s ease;
}

.social-link:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

.bio {
    margin-bottom: 60px;
    max-width: 700px;
}

.bio p {
    margin-bottom: 15px;
    line-height: 1.7;
    color: var(--color-text);
}

/* ============================================
   Accordion
   ============================================ */

.accordion-container {
    border-top: 1px solid var(--color-border);
}

.accordion-item {
    border-bottom: 1px solid var(--color-border);
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all 0.2s ease;
}

.accordion-header:hover {
    opacity: 0.7;
}

.accordion-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--color-text);
    text-align: left;
}

.accordion-icon {
    font-size: 28px;
    font-weight: 300;
    color: var(--color-text);
    transition: transform 0.3s ease;
    line-height: 1;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
    max-height: 2000px;
}

.accordion-body {
    padding-bottom: 40px;
    max-width: 700px;
}

.accordion-body p {
    margin-bottom: 15px;
    line-height: 1.7;
    color: var(--color-text);
}

.accordion-body h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--color-text);
}

.accordion-body .course-description {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--color-border);
    font-style: italic;
    color: var(--color-text-secondary);
}

.cv-download {
    display: inline-block;
    padding: 12px 24px;
    margin-top: 10px;
    background-color: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.cv-download:hover {
    opacity: 0.8;
    color: var(--color-bg);
}

.cv-section {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--color-text);
    margin-top: 30px;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.cv-section:first-child {
    margin-top: 0;
}

/* ============================================
   Publications
   ============================================ */

.publication-category {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-top: 30px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
}

.publication-category:first-child {
    margin-top: 0;
}

.publication-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.publication h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.publication h3 a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s ease;
}

.publication h3 a:hover {
    color: #0066cc;
    text-decoration: underline;
}

.publication .authors {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 5px;
}

.publication .venue {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
    .main-content {
        padding: 40px 24px;
    }

    .name {
        font-size: 24px;
    }

    .social-links {
        gap: 16px;
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .accordion-title {
        font-size: 16px;
    }

    .accordion-header {
        padding: 24px 0;
    }

    .accordion-body {
        padding-bottom: 30px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 30px 20px;
    }

    .name {
        font-size: 22px;
    }

    .accordion-title {
        font-size: 14px;
    }
}