/* ===========================================
   Al-Manhal Welfare Foundation - Main Stylesheet
   Modern, accessible, responsive design
   Mobile-first, with CSS variables and Flexbox/Grid
   =========================================== */

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

:root {
    /* Color Palette */
    --primary-color: #1a5f7a;     /* Deep teal - trust, compassion */
    --secondary-color: #2d936c;   /* Green - growth, health */
    --accent-color: #ff7e5f;      /* Coral - urgency, warmth */
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-color: #333;
    --text-light: #666;
    --white: #ffffff;
    --gray-light: #e9ecef;
    --gray: #adb5bd;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Borders & Shadows */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-color);
}

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

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

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

.section-title h2 {
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

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

.bg-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

/* Header & Navigation */
.site-header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

.logo span {
    font-weight: 400;
    color: var(--dark-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-color);
    padding: var(--spacing-sm);
}

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

.nav-menu a {
    color: var(--dark-color);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    background-color: rgba(26, 95, 122, 0.1);
}

/* Hero Section */
.hero {
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xxl) 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(1, 1fr);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-accent {
    background-color: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.btn-accent:hover {
    background-color: #ff6b4a;
    border-color: #ff6b4a;
    color: var(--white);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.1);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* Footer */
.site-footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-md);
}

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

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

.footer-links h3,
.footer-contact h3 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a,
.footer-contact a {
    color: var(--gray);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--gray);
    font-size: 0.875rem;
}

.footer-bottom a {
    color: var(--gray);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* Responsive Design */
@media (min-width: 768px) {
    h1 {
        font-size: 3rem;
    }
    
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .nav-toggle {
        display: none;
    }
    
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
}

@media (max-width: 991px) {
    .nav-toggle {
        display: block;
    }
    
    .nav {
        position: relative;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        display: block;
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Accessibility */
:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    z-index: 1001;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .hero-buttons,
    .nav-toggle,
    .btn {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .section {
        padding: 1rem 0;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Custom Styles for Specific Pages */
.project-filters,
.news-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.cause-selector,
.project-filter,
.news-filter {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.cause-selector.active,
.project-filter.active,
.news-filter.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.project-card,
.news-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card .btn,
.news-card .btn {
    margin-top: auto;
}

/* Zakat Calculator */
#zakat-calculator {
    background: var(--light-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

#zakat-result {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
}

/* Error States */
.form-control.error {
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.success-message {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin: var(--spacing-lg) 0;
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}