/* premium.css */

:root {
    /* Colors - Clean, Academic, Premium */
    --color-bg: #FAFAFA;
    /* Slightly off-white for less harshness */
    --color-surface: #FFFFFF;
    --color-text-main: #1A1A1A;
    --color-text-muted: #555555;
    --color-primary: #0044CC;
    /* Deep Academic Blue */
    --color-primary-dark: #003399;
    --color-accent: #FFD700;
    /* Gold for awards/highlights */
    --color-border: #E5E5E5;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Merriweather', serif;
    /* Serif for reading, Sans for UI */
    --font-ui: 'Inter', sans-serif;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-main);
    letter-spacing: -0.02em;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

/* Utilities */
.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.bg-light {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-main);
}

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

.nav-links a {
    font-family: var(--font-ui);
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-cta {
    font-family: var(--font-ui);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-left: 1rem;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--color-primary);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-family: var(--font-ui);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 68, 204, 0.2);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.btn-secondary:hover {
    border-color: var(--color-text-main);
    background-color: var(--color-text-main);
    color: white;
}

.btn-text {
    background: none;
    color: var(--color-text-muted);
    padding-left: 0;
}

.btn-text:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

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

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-ui);
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.hero-image {
    max-width: 220px;
}

.hero-image img {
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.hero-image img:hover {
    transform: scale(1.02);
}

/* Highlight / Awards */
.highlight-section {
    padding-top: 0;
}

.highlight-card {
    background: linear-gradient(135deg, #FFFDF0 0%, #FFFFFF 100%);
    border: 1px solid #FFEBAA;
    border-radius: 12px;
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
}

.highlight-icon {
    background: #FFF9C4;
    color: #FBC02D;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.highlight-content h3 {
    margin-bottom: 0.25rem;
    font-size: 1.2rem;
}

.highlight-content p {
    color: var(--color-text-muted);
    font-family: var(--font-ui);
    margin-bottom: 0.5rem;
}

.link-arrow {
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
}

.link-arrow::after {
    content: '→';
    margin-left: 4px;
    transition: transform 0.2s;
}

.link-arrow:hover::after {
    transform: translateX(4px);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
}

.about-text p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: #333;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    border-left: 1px solid var(--color-border);
    padding-left: var(--spacing-md);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 5px;
}

/* Publications */
.pub-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: white;
    /* Optional: Card style 
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: 12px;
    */
}

.pub-image img {
    border-radius: 8px;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.pub-image img:hover {
    transform: scale(1.02);
}

.pub-meta {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pub-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.pub-desc {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    font-family: var(--font-ui);
}

.pub-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    background: white;
}

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

.footer-links a {
    color: var(--color-text-muted);
    font-size: 1.5rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.copyright {
    color: #999;
    font-size: 0.85rem;
    font-family: var(--font-ui);
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-border);
    z-index: 2000;
    display: none;
    max-width: 300px;
}

.cookie-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
}

.cookie-content p {
    font-family: var(--font-ui);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        order: -1;
        max-width: 200px;
        margin: 0 auto;
    }

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

    .nav-links {
        display: none;
        /* For simplicity, hiding nav on mobile for this iteration or could be hamburger */
    }

    .navbar .container {
        justify-content: center;
    }

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

    .about-stats {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-left: 0;
        padding-top: var(--spacing-md);
        flex-direction: row;
        justify-content: space-around;
    }

    .pub-card {
        grid-template-columns: 1fr;
    }

    .pub-image img {
        max-width: 100%;
    }
}