:root {
    --color-primary: #0e3036;
    --color-secondary: #31cb5f;
    --color-white: #ffffff;
    --color-black: #000000;
    --color-text-dark: #1a1a1a;
    --color-text-light: #f5f5f5;
    --color-bg-light: #f8f9fa;

    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 32px;

    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.15);

    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

/* Typography Utilities */
.text-primary {
    color: var(--color-primary);
}

.text-secondary {
    color: var(--color-secondary);
}

.text-white {
    color: var(--color-white);
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* Components */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-family: var(--font-heading);
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition-medium);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: #28a74e;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(14, 48, 54, 0.95);
    /* Primary color with opacity */
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    transition: var(--transition-medium);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--color-secondary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(14, 48, 54, 0.95), rgba(14, 48, 54, 0.8)), url('hero-bg-placeholder.jpg');
    /* Need to handle placeholder later or use CSS pattern */
    background-color: var(--color-primary);
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: var(--color-white);
    text-align: center;
    padding-top: 80px;
    /* Offset for fixed header */
    position: relative;
    overflow: hidden;
}

/* Abstract shapes for bg if image not available */
.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(49, 203, 95, 0.1) 0%, rgba(49, 203, 95, 0) 70%);
    border-radius: 50%;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: clamp(3rem, 5vw, 5rem);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

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

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.section-title {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-secondary);
    margin-top: 8px;
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    color: #4a5568;
}

.about-image {
    background-color: #e2e8f0;
    border-radius: var(--border-radius-md);
    height: 400px;
    position: relative;
    overflow: hidden;
}

/* Impact Section / Why $10 */
.impact {
    background-color: var(--color-bg-light);
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.impact-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-medium);
    text-align: center;
}

.impact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.icon-box {
    width: 80px;
    height: 80px;
    background-color: rgba(49, 203, 95, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    color: var(--color-secondary);
    font-size: 2rem;
}

.impact-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

/* Donate Section */
.donate-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.donate-container {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Footer */
footer {
    background-color: #081d21;
    /* Darker shade of primary */
    color: var(--color-text-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.social-links {
    margin-bottom: var(--spacing-md);
}

.social-links a {
    color: var(--color-white);
    margin: 0 10px;
    font-size: 1.2rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-links a:hover {
    color: var(--color-secondary);
}

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

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .nav-links {
        display: none;
        /* Add JS toggle later */
    }
}