:root {
    /* Основные цвета в светло-зелёной палитре */
    --color-primary: #4CAF50;
    --color-primary-dark: #388E3C;
    --color-primary-light: #81C784;
    --color-secondary: #A5D6A7;
    --color-tertiary: #C8E6C9;
    --color-bg: #E8F5E9;
    --color-bg-alt: #F1F8E9;
    --color-text: #2E7D32;
    --color-text-light: #4CAF50;
    --color-text-dark: #1B5E20;
    --color-accent: #FFC107;
    
    /* Оттенки зелёного для фона */
    --bg-light: #F5F9F5;
    --bg-medium: #E8F5E9;
    --bg-card: #FFFFFF;
    
    /* Тени и эффекты */
    --shadow-sm: 0 2px 8px rgba(76, 175, 80, 0.1);
    --shadow-md: 0 4px 16px rgba(76, 175, 80, 0.15);
    --shadow-lg: 0 8px 32px rgba(76, 175, 80, 0.2);
    --shadow-hover: 0 8px 24px rgba(76, 175, 80, 0.25);
    
    /* Скругления */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* Переходы */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

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

/* Header styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.header.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.logo-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.nav {
    display: flex;
    gap: 24px;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary-dark);
    background-color: var(--color-tertiary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

/* Hero section */
.hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-tertiary) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="none"><circle cx="50" cy="50" r="2" fill="rgba(76, 175, 80, 0.1)"/></svg>') repeat;
    background-size: 30px 30px;
    opacity: 0.3;
    animation: patternMove 20s linear infinite;
}

@keyframes patternMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(30px) translateY(30px); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Sections */
.section {
    padding: 80px 0;
    position: relative;
}

.section-alt {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary-dark));
    border-radius: 2px;
}

/* Content cards */
.content-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-tertiary);
    transition: var(--transition);
}

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

.highlight-box {
    background: linear-gradient(135deg, var(--color-tertiary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-top: 24px;
    border-left: 4px solid var(--color-primary);
}

.highlight-box h3 {
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}

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

.highlight-box li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 8px;
}

.highlight-box li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-dark);
    font-weight: bold;
}

/* Species grid */
.species-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.species-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.species-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.species-card h3 {
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    font-size: 1.4rem;
}

/* Facts list */
.facts-list {
    max-width: 900px;
    margin: 0 auto;
}

.fact-item {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 40px;
    padding: 32px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--color-primary);
}

.fact-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.fact-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary-light);
    min-width: 60px;
    text-align: center;
    line-height: 1;
}

.fact-content h3 {
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    font-size: 1.3rem;
}

/* Habitat grid */
.habitat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.habitat-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.habitat-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.habitat-item h4 {
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}

/* Conservation section */
.conservation-warning {
    display: flex;
    align-items: center;
    gap: 20px;
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
    border-left: 4px solid var(--color-accent);
}

.warning-icon {
    font-size: 2.5rem;
    min-width: 50px;
    text-align: center;
}

.warning-text h3 {
    color: #E65100;
    margin-bottom: 8px;
}

.threats-list {
    list-style-type: none;
    padding: 0;
    margin: 24px 0;
}

.threats-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-tertiary);
    position: relative;
    padding-left: 32px;
}

.threats-list li::before {
    content: '⚠️';
    position: absolute;
    left: 0;
}

.conservation-actions {
    margin-top: 32px;
}

.conservation-actions h3 {
    color: var(--color-primary-dark);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.action-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.action-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--color-tertiary);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.action-item:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
}

.action-icon {
    font-size: 1.5rem;
    min-width: 40px;
    text-align: center;
}

/* Footer */
.footer {
    background: var(--color-text-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--color-primary-light);
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .fact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .conservation-warning {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .content-card {
        padding: 24px;
    }
    
    .species-grid,
    .habitat-grid,
    .action-items {
        grid-template-columns: 1fr;
    }
}