:root {
    /* Color Palette - Light Theme */
    --color-primary: #1E90FF;
    --color-primary-light: #4DB8FF;
    --color-primary-dark: #0066CC;
    --color-bg-light: #FFFFFF;
    --color-bg-grey: #F5F5F5;
    --color-bg-card: #FFFFFF;
    --color-text-primary: #000000;
    --color-text-secondary: #666666;

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

    /* Radius - All sharp corners */
    --radius-sm: 0;
    --radius-md: 0;
    --radius-lg: 0;
    --radius-xl: 0;

    /* Shadows - Disabled */
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(180deg, #FFFFFF 0%, #E8E8E8 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-display);
    color: var(--color-primary);
    text-decoration: none;
}

.logo {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(30, 144, 255, 0.06);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: url('https://media.cnn.com/api/v1/images/stellar/prod/221027124934-02-emperor-penguins.jpg?q=w_1160,c_fill/f_webp') center/cover no-repeat;
    overflow: hidden;
    padding: var(--spacing-xl) 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-image {
    display: none;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    color: #FFFFFF;
    font-weight: 800;
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.1;
    font-family: var(--font-display);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: #FFFFFF;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

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

.hero-stat {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid rgba(30, 144, 255, 0.3);
    transition: all 0.3s ease;
}

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

.stat-number,
.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #FFFFFF;
    display: block;
    margin-bottom: var(--spacing-xs);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.stat-label {
    color: #FFFFFF;
    font-size: 0.9rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-primary);
    font-size: 2rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

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

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

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

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
    color: var(--color-primary);
}

.section-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

/* ===== Species Section ===== */
.species-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
    row-gap: var(--spacing-lg);
}

.species-card {
    background: #FFFFFF;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(30, 144, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    cursor: pointer;
}

.species-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
}

.species-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.species-icon.emperor {
    color: var(--color-primary-light);
}

.species-icon.adelie {
    color: #4DD0E1;
}

.species-icon.chinstrap {
    color: #1E90FF;
}

.species-icon.gentoo {
    color: #0066CC;
}

.species-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    text-align: left;
}

.species-population,
.population-count {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.species-trend {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.species-trend.positive {
    color: #4CAF50;
}

.species-trend.negative {
    color: #F44336;
}

.population-trend {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

.population-trend.positive {
    color: #4CAF50;
}

.population-trend.negative {
    color: #F44336;
}

.species-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.info-tag {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.species-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.species-detail span {
    color: var(--color-primary-light);
    font-weight: 600;
}

/* ===== News Section ===== */
.news-section {
    background: #F8F8F8;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.news-card {
    background: #FFFFFF;
    border: 1px solid #E0E0E0;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.news-date {
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.news-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.news-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Colonies Section ===== */
.colonies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
    row-gap: calc(var(--spacing-lg) + 0.3rem);
}

.colony-card {
    background: #FFFFFF;
    border: 1px solid rgba(30, 144, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
}

.colony-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.colony-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
}

.colony-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
}

.colony-species {
    background: var(--color-primary);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.colony-location {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.colony-population {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
}

.colony-details {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===== Map Section ===== */
.map-section {
    background: var(--color-bg-dark);
}

.map-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-lg);
    align-items: start;
}

.antarctica-map {
    position: relative;
    background: #FFFFFF;
    border: 2px solid rgba(30, 144, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    overflow: hidden;
}

.leaflet-map-container {
    width: 100%;
    height: 600px;
    border-radius: var(--radius-md);
    z-index: 1;
}

/* Leaflet Dark Theme Customization */
.leaflet-container {
    background: #FFFFFF;
    font-family: var(--font-primary);
}

.leaflet-popup-content-wrapper {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(30, 144, 255, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.leaflet-popup-tip {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(30, 144, 255, 0.3);
    border-top: none;
    border-left: none;
}

.leaflet-popup-content {
    margin: 0.8rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.leaflet-popup-content h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.leaflet-popup-content strong {
    color: var(--color-primary);
}

.leaflet-control-zoom a {
    background: rgba(255, 255, 255, 0.9) !important;
    color: var(--color-text-primary) !important;
    border: 1px solid rgba(30, 144, 255, 0.3) !important;
}

.leaflet-control-zoom a:hover {
    background: rgba(30, 144, 255, 0.1) !important;
    border-color: var(--color-primary) !important;
}

.map-legend {
    background: #FFFFFF;
    border: 1px solid rgba(30, 144, 255, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    height: 600px;
    overflow-y: auto;
}

.map-legend h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary-light);
    font-size: 1.2rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.legend-marker {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid white;
}

.legend-marker.adelie {
    background: #4DD0E1;
}

.legend-marker.chinstrap {
    background: #B968C7;
}

.legend-marker.emperor {
    background: #FFC107;
}

.legend-marker.gentoo {
    background: #66BB6A;
}

.legend-marker.macaroni {
    background: #E91E63;
}

.stats-summary {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(30, 144, 255, 0.2);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.stat-row strong {
    color: var(--color-primary-light);
    font-weight: 600;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-bg-darker);
    border-top: 1px solid rgba(30, 144, 255, 0.2);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

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

.footer-brand .logo {
    height: 50px;
    width: auto;
}

.footer-brand h3 {
    font-family: var(--font-display);
    color: var(--color-primary);
    margin: 0;
    font-size: 1.5rem;
    line-height: 1.2;
}

.footer-brand p {
    color: var(--color-text-secondary);
    margin: 0;
    font-size: 0.85rem;
}

.footer-info {
    text-align: right;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
}

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

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

/* ===== Responsive ===== */
@media (max-width: 968px) {
    .map-container {
        grid-template-columns: 1fr;
    }

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

    .footer-info {
        text-align: center;
    }

    .nav-links {
        gap: var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .nav-brand {
        font-size: 1.2rem;
    }

    .nav-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

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

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