/* Theme Variables & Styling */

:root {
    /* Colors */
    --primary-dark: #0f1c15;
    --primary-light: #f8faf9;
    --accent-green: #10b981;
    --accent-green-bright: #34d399;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --card-bg: rgba(30, 50, 40, 0.8);
    --border-color: rgba(16, 185, 129, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Light Theme */
body.light-theme {
    --primary-dark: #ffffff;
    --primary-light: #f8faf9;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --card-bg: rgba(248, 250, 249, 0.95);
}

/* Header & Navigation */
header {
    background-color: var(--primary-dark);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 600;
    transition: color var(--transition-normal);
}

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

#themeToggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
}

/* Footer */
footer {
    background-color: var(--primary-dark);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 3rem;
}

footer a {
    color: var(--accent-green);
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

/* Sections */
section {
    padding: 3rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    section {
        padding: 2rem 0;
    }

    .section-title {
        font-size: 1.5rem;
    }
}