/* ===================================
   CSS Custom Properties & Reset
   =================================== */
:root {
    /* Colors - Rust Theme */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-card: rgba(255, 255, 255, 0.9);
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-accent-orange: #B7410E;
    --color-accent-amber: #D2691E;
    --color-accent-deep: #8B3103;
    --color-gradient-1: linear-gradient(135deg, #B7410E 0%, #D2691E 100%);
    --color-gradient-2: linear-gradient(135deg, #D2691E 0%, #B7410E 100%);
    --color-gradient-gold: linear-gradient(135deg, #B7410E 0%, #D2691E 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px rgba(183, 65, 14, 0.25);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
}

.subsection-title {
    font-size: 2rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    color: var(--color-text-primary);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(183, 65, 14, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(210, 105, 30, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    animation: fadeInUp 1s ease;
}

.hero-image-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-md);
}

.hero-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(183, 65, 14, 0.25);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.hero-image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
    background: var(--color-gradient-1);
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    z-index: 1;
    animation: pulse 4s ease-in-out infinite;
}

.hero-name {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.hero-affiliation {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-gradient-1);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(183, 65, 14, 0.08);
    color: var(--color-accent-orange);
    border: 2px solid rgba(183, 65, 14, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(183, 65, 14, 0.15);
    border-color: rgba(183, 65, 14, 0.5);
    transform: translateY(-2px);
}

/* Scroll Indicator */
.scroll-indicator-link {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-decoration: none;
    cursor: pointer;
}

.scroll-indicator {
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid rgba(183, 65, 14, 0.4);
    border-radius: 25px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-accent-orange);
    border-radius: 50%;
    animation: scroll 2s infinite;
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    gap: var(--spacing-lg);
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.about-text .lead {
    font-size: 1.3rem;
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.highlight-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(183, 65, 14, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.highlight-card:hover {
    transform: translateY(-5px);
    border-color: rgba(183, 65, 14, 0.4);
    box-shadow: var(--shadow-lg);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.highlight-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-orange);
}

.highlight-card ul {
    list-style: none;
    padding-left: 0;
}

.highlight-card li {
    padding: 0.3rem 0;
    color: var(--color-text-secondary);
}

.highlight-card li::before {
    content: "→ ";
    color: var(--color-accent-orange);
    font-weight: bold;
}

/* ===================================
   Research Section
   =================================== */
.research {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-primary);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(183, 65, 14, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-gradient-1);
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: rgba(183, 65, 14, 0.4);
    box-shadow: var(--shadow-lg);
}

.metric-value {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--color-gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-display);
}

.metric-suffix {
    display: inline;
    font-size: 2rem;
    color: var(--color-accent-orange);
}

.metric-label {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.publication-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(210, 105, 30, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.publication-card:hover {
    transform: translateY(-5px);
    border-color: rgba(210, 105, 30, 0.4);
    box-shadow: var(--shadow-lg);
}

.publication-citations {
    display: inline-block;
    background: var(--color-gradient-2);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.publication-card h4 {
    font-size: 1.1rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.publication-year {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ===================================
   Awards Section
   =================================== */
.awards {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.award-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 16px;
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.award-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-gradient-gold);
}

.award-card:hover {
    transform: translateY(-5px);
    border-color: rgba(245, 158, 11, 0.5);
    box-shadow: var(--shadow-lg);
}

.award-year {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--color-gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.award-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.award-card h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.award-card p {
    color: var(--color-text-secondary);
}

/* ===================================
   Editorial Section
   =================================== */
.editorial {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-primary);
}

.editorial-content {
    max-width: 900px;
    margin: 0 auto;
}

.editorial-section {
    margin-bottom: var(--spacing-lg);
}

.editorial-section h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-orange);
}

.journal-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(183, 65, 14, 0.15);
    border-radius: 12px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-normal);
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
}

.journal-card.featured {
    background: var(--color-gradient-1);
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    border: none;
    box-shadow: var(--shadow-md);
}

.journal-card:hover {
    transform: translateX(10px);
    border-color: rgba(183, 65, 14, 0.4);
}

.journals-list {
    display: grid;
    gap: var(--spacing-sm);
}

/* ===================================
   Links Section
   =================================== */
.links {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.link-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(183, 65, 14, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    position: relative;
    display: block;
    box-shadow: var(--shadow-sm);
}

.link-card:hover {
    transform: translateY(-8px);
    border-color: rgba(183, 65, 14, 0.5);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.link-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.link-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent-orange);
}

.link-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.link-arrow {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--color-accent-orange);
    transition: all var(--transition-normal);
}

.link-card:hover .link-arrow {
    transform: translateX(5px);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(183, 65, 14, 0.15);
    border-radius: 16px;
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.contact-card:hover {
    transform: translateY(-5px);
    border-color: rgba(183, 65, 14, 0.4);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-orange);
}

.contact-card a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-card a:hover {
    color: var(--color-accent-orange);
}

.contact-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid rgba(183, 65, 14, 0.1);
}

.footer p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent-orange);
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .hero-name {
        font-size: 2.5rem;
    }

    .hero-title {
        font-size: 1.2rem;
    }

    .hero-tagline {
        font-size: 1.3rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .subsection-title {
        font-size: 1.5rem;
    }

    .metric-value {
        font-size: 2.5rem;
    }

    .metrics-grid,
    .publications-grid,
    .awards-grid,
    .links-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .hero-image-wrapper {
        width: 150px;
        height: 150px;
    }

    .hero-name {
        font-size: 2rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}