/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0073aa;
    --color-text: #23282d;
    --color-text-light: #50575e;
    --color-bg: #ffffff;
    --color-bg-alt: #f7f7f7;
    --color-border: #dcdcde;
    --color-button: #32373c;
    --color-button-hover: #23282d;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --max-width: 1200px;
    --border-radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

/* Header Styles */
.site-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

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

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

.site-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-button);
    color: white;
    text-decoration: none;
    border-radius: 9999px;
    font-weight: 600;
    transition: background-color 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    background-color: var(--color-button-hover);
}

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

.btn-donate:hover {
    background-color: #005177;
}

/* Main Content Styles */
.site-main {
    min-height: 60vh;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

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

.section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.card p {
    color: var(--color-text-light);
    line-height: 1.7;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

/* Content Page Styles */
.content-page {
    padding: var(--spacing-lg) 0;
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.content-page h2 {
    font-size: 2rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--color-text);
}

.content-page h3 {
    font-size: 1.5rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--color-text);
}

.content-page p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.8;
}

.content-page ul,
.content-page ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.content-page li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.content-page a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
}

.content-page a:hover {
    border-bottom-color: var(--color-primary);
}

/* Footer Styles */
.site-footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-text p {
    font-size: 1rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-social a {
    color: white;
    transition: opacity 0.3s ease;
}

.footer-social a:hover {
    opacity: 0.7;
}

.footer-copyright {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-top: var(--spacing-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
    }

    .main-nav.active {
        display: flex;
        flex-direction: column;
        align-items: stretch;
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-sm);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

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

    .content-page h1 {
        font-size: 2rem;
    }
}

/* Accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .btn {
        display: none;
    }

    .site-main {
        padding: 0;
    }
}