/* CSS Variables - Alpine Frost Palette */
:root {
    --color-bg: #E3EDF7;
    --color-bg-alt: #F7FAFC;
    --color-primary: #2E5090;
    --color-primary-dark: #0A1929;
    --color-accent: #A8C4E0;
    --color-text: #1A1A1A;
    --color-text-light: #4A6670;
    --color-white: #FFFFFF;
    
    --font-display: 'Playfair Display', serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    --transition: all 0.3s ease;
    --shadow: 0 4px 20px rgba(46, 80, 144, 0.1);
    --shadow-hover: 0 8px 30px rgba(46, 80, 144, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 48px;
    background: rgba(227, 237, 247, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(168, 196, 224, 0.3);
}

.nav-brand {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 48px 80px;
    position: relative;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    width: 100%;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--color-accent);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 50px;
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 16px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 500px;
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-placeholder {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-bg) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-hover);
}

.hero-image-placeholder svg {
    width: 150px;
    height: 150px;
    color: var(--color-primary);
    opacity: 0.6;
}

/* Section Styles */
section {
    padding: 100px 48px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-accent);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-primary-dark);
    font-weight: 600;
}

/* About Section */
.about {
    background: var(--color-white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-lead {
    font-size: 1.35rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 24px;
    line-height: 1.7;
}

.about-content p {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.value-item {
    text-align: center;
    padding: 32px;
    background: var(--color-bg);
    border-radius: 16px;
    transition: var(--transition);
}

.value-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.value-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--color-accent);
    font-weight: 700;
    margin-bottom: 16px;
}

.value-item h4 {
    font-size: 1.1rem;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.value-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin: 0;
}

/* Education Section */
.education {
    background: var(--color-bg);
}

.education-timeline {
    max-width: 800px;
    margin: 0 auto 60px;
}

.timeline-item {
    position: relative;
    padding-left: 40px;
    padding-bottom: 40px;
    border-left: 2px solid var(--color-accent);
}

.timeline-marker {
    position: absolute;
    left: -8px;
    top: 0;
    width: 14px;
    height: 14px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 3px solid var(--color-bg);
}

.timeline-status {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.timeline-institution {
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.timeline-description {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Contact Section */
.contact {
    background: var(--color-white);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-lead {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: 32px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.contact-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.contact-link svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* Footer */
.footer {
    background: var(--color-primary-dark);
    color: var(--color-white);
    padding: 40px 48px;
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image-placeholder {
        width: 300px;
        height: 300px;
        margin: 0 auto;
    }
    
    .about-values {
        grid-template-columns: 1fr;
    }
    
    .navbar {
        padding: 16px 24px;
    }
    
    .nav-links {
        gap: 24px;
    }
    
    section {
        padding: 80px 24px;
    }
    
    .hero {
        padding: 100px 24px 60px;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}