/* ===== CSS Variables ===== */
:root {
    /* Colors - White & Black with Blue accent */
    --color-bg: #ffffff;
    --color-bg-alt: #ffffff;
    --color-bg-card: #ffffff;
    --color-text: #000000;
    --color-text-muted: #525252;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-accent: #0ea5e9;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-shadow: rgba(0, 0, 0, 0.04);

    /* Glass effect */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
    --gradient-subtle: linear-gradient(180deg, #ffffff 0%, #fafafa 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.95));


    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows - Soft glass shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-bg: #09090b;
    --color-bg-alt: #18181b;
    --color-bg-card: #18181b;
    --color-text: #fafafa;
    --color-text-muted: #a1a1aa;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-shadow: rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(24, 24, 27, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --gradient-subtle: linear-gradient(180deg, #09090b 0%, #18181b 100%);
    --gradient-card: linear-gradient(145deg, rgba(24, 24, 27, 0.9), rgba(24, 24, 27, 0.6));
}


/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: transparent;
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    background: var(--color-bg-alt);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-img {
    height: 45px;
    width: auto;
    transition: all 0.3s ease;
}

.nav-logo:hover .logo-img {
    transform: scale(1.1);
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.5));
}


.logo-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
    transition: all 0.3s ease;
}

.nav-logo:hover .logo-name {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}



.monogram::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.2) 50%, transparent 60%);
    transform: translateX(-100%);
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    50%,
    100% {
        transform: translateX(100%);
    }
}

.mono-a,
.mono-s {
    font-size: 1.3rem;
    font-weight: 800;
    color: white;
    line-height: 1;
    position: relative;
}

.mono-a {
    margin-right: -4px;
    z-index: 2;
}

.mono-s {
    z-index: 1;
}

.nav-logo:hover .monogram {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #1e293b, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

[data-theme="dark"] .logo-name {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo:hover .logo-name {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}



.logo-letters {
    display: flex;
}

.letter {
    display: inline-block;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
    transition: all 0.3s ease;
}

.letter:nth-child(1) {
    animation-delay: 0s;
}

.letter:nth-child(2) {
    animation-delay: 0.1s;
}

.letter:nth-child(3) {
    animation-delay: 0.2s;
}

.surname .letter:nth-child(1) {
    animation-delay: 0.3s;
}

.surname .letter:nth-child(2) {
    animation-delay: 0.4s;
}

.surname .letter:nth-child(3) {
    animation-delay: 0.5s;
}

.surname .letter:nth-child(4) {
    animation-delay: 0.6s;
}

.surname .letter:nth-child(5) {
    animation-delay: 0.7s;
}

.surname .letter:nth-child(6) {
    animation-delay: 0.8s;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.nav-logo:hover .letter {
    animation: letterPop 0.4s ease forwards, gradientShift 3s ease infinite;
    text-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.nav-logo:hover .letter:nth-child(1) {
    animation-delay: 0s, 0s;
}

.nav-logo:hover .letter:nth-child(2) {
    animation-delay: 0.05s, 0.1s;
}

.nav-logo:hover .letter:nth-child(3) {
    animation-delay: 0.1s, 0.2s;
}

.nav-logo:hover .surname .letter:nth-child(1) {
    animation-delay: 0.15s, 0.3s;
}

.nav-logo:hover .surname .letter:nth-child(2) {
    animation-delay: 0.2s, 0.4s;
}

.nav-logo:hover .surname .letter:nth-child(3) {
    animation-delay: 0.25s, 0.5s;
}

.nav-logo:hover .surname .letter:nth-child(4) {
    animation-delay: 0.3s, 0.6s;
}

.nav-logo:hover .surname .letter:nth-child(5) {
    animation-delay: 0.35s, 0.7s;
}

.nav-logo:hover .surname .letter:nth-child(6) {
    animation-delay: 0.4s, 0.8s;
}

@keyframes letterPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2) translateY(-3px);
    }

    100% {
        transform: scale(1);
    }
}

.logo-divider {
    width: 12px;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
    margin: 0 8px;
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {

    0%,
    100% {
        box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
        opacity: 0.8;
    }

    50% {
        box-shadow: 0 0 20px rgba(139, 92, 246, 0.8);
        opacity: 1;
    }
}

.nav-logo:hover .logo-divider {
    width: 25px;
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.9);
}

.surname .letter {
    font-weight: 800;
}


.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
    padding: var(--spacing-sm) 0;
}



.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}


.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--color-primary);
    color: white;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}


/* ===== Hero Section - Modern Glassmorphism ===== */
.hero-minimal {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--spacing-xl) var(--spacing-3xl);
    background: var(--gradient-subtle);
    position: relative;
    overflow: hidden;
}

/* Subtle gradient orbs for visual interest */
.hero-minimal::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-minimal::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-profile {
    margin-bottom: var(--spacing-xl);
}

.hero-photo {
    width: 160px;
    height: 160px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    background: var(--glass-bg);
}

.hero-photo:hover {
    transform: scale(1.03);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

.hero-name-minimal {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-role {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    font-weight: 400;
}

.hero-university {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.hero-university i {
    color: var(--color-primary);
}

.hero-interests {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.hero-interests span {
    padding: 8px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.hero-interests span:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

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

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

.hero-btn.primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.hero-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
}

.hero-btn.secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--color-text);
    border: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.hero-btn.secondary:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
    transform: translateY(-2px);
}

.hero-btn.outline {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.hero-btn.outline:hover {
    background: var(--glass-bg);
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

/* Dark mode adjustments */
[data-theme="dark"] .hero-photo {
    border-color: var(--glass-border);
}

[data-theme="dark"] .hero-interests span:hover {
    background: var(--color-text);
    color: var(--color-bg);
}

[data-theme="dark"] .hero-btn.secondary:hover {
    background: var(--color-text);
    color: var(--color-bg);
}

/* Navbar - Glass style */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.navbar .nav-logo {
    color: var(--color-text);
}

.navbar .nav-links a {
    color: var(--color-text-muted);
}

.navbar .theme-toggle {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

/* ===== Section Styles ===== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text);
}

.title-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--font-size-xl);
}

/* ===== About Section ===== */
.about-section {
    background: var(--color-bg-alt);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.about-text .lead {
    font-size: var(--font-size-xl);
    color: var(--color-text);
}

.about-text strong {
    color: var(--color-primary);
}

.about-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--color-border);
}

.stat {
    flex: 1;
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Research Section ===== */
.research-section {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

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

.research-card {
    background: var(--color-bg-card);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: cardFadeIn 0.6s ease forwards;
}

.research-card:nth-child(1) {
    animation-delay: 0.1s;
}

.research-card:nth-child(2) {
    animation-delay: 0.2s;
}

.research-card:nth-child(3) {
    animation-delay: 0.3s;
}

.research-card:nth-child(4) {
    animation-delay: 0.4s;
}

.research-card:nth-child(5) {
    animation-delay: 0.5s;
}

.research-card:nth-child(6) {
    animation-delay: 0.6s;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.research-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.research-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(59, 130, 246, 0.25);
    border-color: rgba(59, 130, 246, 0.3);
}

.research-card:hover::before {
    opacity: 1;
}

.research-card:hover::after {
    transform: scaleX(1);
}

.research-card:nth-child(1):hover {
    box-shadow: 0 25px 50px -12px rgba(59, 130, 246, 0.25);
}

.research-card:nth-child(2):hover {
    box-shadow: 0 25px 50px -12px rgba(139, 92, 246, 0.25);
}

.research-card:nth-child(3):hover {
    box-shadow: 0 25px 50px -12px rgba(236, 72, 153, 0.25);
}

.research-card:nth-child(4):hover {
    box-shadow: 0 25px 50px -12px rgba(16, 185, 129, 0.25);
}

.card-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 10px 30px -5px rgba(59, 130, 246, 0.4);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {

    0%,
    100% {
        transform: translateY(0);
    }

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

.research-card:hover .card-icon {
    animation: none;
    transform: scale(1.15) rotate(8deg);
    box-shadow: 0 15px 40px -5px currentColor;
}


.research-card:nth-child(1) .card-icon {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.research-card:nth-child(2) .card-icon {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}

.research-card:nth-child(3) .card-icon {
    background: linear-gradient(135deg, #ec4899, #be185d);
}

.research-card:nth-child(4) .card-icon {
    background: linear-gradient(135deg, #10b981, #047857);
}

.research-card:nth-child(1) .card-icon {
    box-shadow: 0 10px 30px -5px rgba(59, 130, 246, 0.4);
}

.research-card:nth-child(2) .card-icon {
    box-shadow: 0 10px 30px -5px rgba(139, 92, 246, 0.4);
}

.research-card:nth-child(3) .card-icon {
    box-shadow: 0 10px 30px -5px rgba(236, 72, 153, 0.4);
}

.research-card:nth-child(4) .card-icon {
    box-shadow: 0 10px 30px -5px rgba(16, 185, 129, 0.4);
}

.research-card:nth-child(5) .card-icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    box-shadow: 0 10px 30px -5px rgba(6, 182, 212, 0.4);
}

.research-card:nth-child(6) .card-icon {
    background: linear-gradient(135deg, #f97316, #ea580c);
    box-shadow: 0 10px 30px -5px rgba(249, 115, 22, 0.4);
}

.research-card:nth-child(5):hover {
    box-shadow: 0 25px 50px -12px rgba(6, 182, 212, 0.25);
}

.research-card:nth-child(6):hover {
    box-shadow: 0 25px 50px -12px rgba(249, 115, 22, 0.25);
}

.research-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.research-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    position: relative;
    z-index: 1;
}

.research-card p {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.research-card em {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
}



/* ===== Publications Section ===== */
.publications-section {
    background: var(--color-bg-alt);
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.publication-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.publication-card.featured {
    border-left: 4px solid var(--color-primary);
    background: linear-gradient(135deg, var(--color-bg-card), rgba(59, 130, 246, 0.05));
}

.pub-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.pub-year {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
}

.pub-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1.4;
}

.pub-authors {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.pub-authors strong {
    color: var(--color-primary);
}

.pub-venue {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

.pub-actions {
    margin-top: var(--spacing-md);
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.pub-link:hover {
    color: var(--color-primary-dark);
}

.publications-more {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ===== Teaching Section ===== */
.teaching-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.teaching-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.teaching-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.course-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    color: white;
    font-size: var(--font-size-3xl);
    flex-shrink: 0;
}

.course-info {
    flex: 1;
}

.course-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.course-name {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.course-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.course-arrow {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.teaching-card:hover .course-arrow {
    background: var(--color-primary);
    color: white;
    transform: translateX(5px);
}

/* ===== Contact Section ===== */
.contact-section {
    background: var(--color-bg-alt);
}

.contact-intro {
    text-align: center;
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

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

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.contact-card i {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
}

.contact-card span {
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

.contact-card small {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ===== Quote Section ===== */
.quote-section {
    background: var(--color-bg-alt);
    padding: var(--spacing-3xl) 0;
}

.quote-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.quote-text {
    font-size: var(--font-size-xl);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.quote-body {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.quote-footer {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-style: italic;
}

/* ===== Footer ===== */
.footer {
    background: #1a1a2e;
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo span {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-tags {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .image-wrapper {
        width: 220px;
        height: 220px;
    }

    .hero-name {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-bg-alt);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        color: var(--color-text) !important;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .about-stats {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xl);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: var(--font-size-3xl);
    }

    .hero-title {
        font-size: var(--font-size-xl);
    }

    .hero-cta {
        flex-direction: column;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .teaching-card {
        flex-direction: column;
        text-align: center;
    }

    .course-arrow {
        display: none;
    }
}

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

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth fade in for sections */
.section {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.section:nth-child(1) {
    animation-delay: 0.1s;
}

.section:nth-child(2) {
    animation-delay: 0.2s;
}

.section:nth-child(3) {
    animation-delay: 0.3s;
}

.section:nth-child(4) {
    animation-delay: 0.4s;
}

.section:nth-child(5) {
    animation-delay: 0.5s;
}

/* ===== Insights Section ===== */
.insights-section {
    background: var(--color-bg);
}

.insights-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.insights-quote {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
    font-style: italic;
}

.insights-list {
    list-style: none;
    padding: 0;
    text-align: left;
    max-width: 600px;
    margin: var(--spacing-xl) auto;
}

.insights-list li {
    padding: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
    position: relative;
    color: var(--color-text-muted);
    line-height: 1.7;
    border-bottom: 1px solid var(--color-border);
}

.insights-list li:last-child {
    border-bottom: none;
}

.insights-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

.insights-footer {
    margin-top: var(--spacing-xl);
    color: var(--color-primary);
    font-weight: 500;
    font-style: italic;
}

/* ===== Page Header ===== */
.page-header {
    padding: 150px 0 60px;
    background: var(--gradient-subtle);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.page-header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

/* ===== Conferences Page ===== */
.conferences-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.conference-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: grid;
    grid-template-columns: 300px 1fr;
    transition: all var(--transition-normal);
}

.conference-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.conference-image {
    width: 100%;
    height: 100%;
    min-height: 250px;
}

.conference-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.conference-content {
    padding: var(--spacing-xl);
}

.conference-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.conference-date {
    font-weight: 600;
    color: var(--color-primary);
}

.conference-location {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.conference-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.conference-paper {
    background: rgba(59, 130, 246, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.conference-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.conference-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 500;
    margin-top: var(--spacing-md);
}

.conference-link:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .conference-card {
        grid-template-columns: 1fr;
    }

    .conference-image {
        height: 200px;
    }
}