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

:root {
    /* Color Palette - Inspired by Islamic aesthetics */
    --primary-green: #0c7b3f;
    --secondary-green: #1a9650;
    --light-green: #e8f5e8;
    --accent-gold: #d4af37;
    --warm-white: #fafafa;
    --soft-gray: #f5f7fa;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --border-light: #e2e8f0;
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--warm-white) 0%, var(--soft-gray) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-size: var(--font-size-base);
}

/* App Container */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-4);
}

/* Header Styles */
.app-header {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    padding: var(--spacing-6);
    margin-bottom: var(--spacing-8);
    border: 1px solid var(--border-light);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.logo i {
    font-size: var(--font-size-2xl);
    color: var(--primary-green);
}

.logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.progress-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-weight: 500;
    color: var(--text-secondary);
}

.current-card {
    color: var(--primary-green);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.divider {
    color: var(--text-light);
}

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

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--light-green);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-green), var(--secondary-green));
    border-radius: var(--radius-sm);
    transition: width var(--transition-normal);
    width: 2.22%; /* 1/45 cards */
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

/* Flashcard Styles */
.flashcard-container {
    perspective: 1000px;
}

.flashcard {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-light);
    min-height: 400px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.flashcard:hover {
    box-shadow: var(--shadow-large);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: white;
    padding: var(--spacing-5) var(--spacing-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-category {
    font-size: var(--font-size-sm);
    font-weight: 500;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-number {
    font-size: var(--font-size-sm);
    font-weight: 500;
    opacity: 0.8;
}

.card-content {
    flex: 1;
    padding: var(--spacing-8) var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--spacing-4);
}

.card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.card-body p {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-secondary);
}

.card-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Transliteration styling */
.card-body em {
    color: var(--primary-green);
    font-style: italic;
    font-weight: 500;
    background: var(--light-green);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    font-family: 'Times New Roman', serif;
}

.card-body ul, .card-body ol {
    padding-left: var(--spacing-6);
}

.card-body li {
    margin-bottom: var(--spacing-2);
    color: var(--text-secondary);
}

.card-footer {
    padding: var(--spacing-5) var(--spacing-6);
    border-top: 1px solid var(--border-light);
    background: var(--light-green);
}

.arabic-text {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--primary-green);
    line-height: 1.8;
    direction: rtl;
    font-family: 'Amiri', 'Times New Roman', serif;
}

.arabic-text:empty {
    display: none;
}

.arabic-text + .card-footer {
    padding-top: 0;
}

/* Navigation Controls */
.navigation-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-soft);
    min-width: 120px;
}

.nav-btn:hover:not(:disabled) {
    border-color: var(--primary-green);
    color: var(--primary-green);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.nav-btn:active:not(:disabled) {
    transform: translateY(0);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--soft-gray);
}

.nav-btn i {
    font-size: var(--font-size-sm);
}

.next-btn {
    background: var(--primary-green);
    color: white;
    border-color: var(--primary-green);
}

.next-btn:hover:not(:disabled) {
    background: var(--secondary-green);
    border-color: var(--secondary-green);
    color: white;
}

/* Navigation Dots */
.nav-dots {
    display: flex;
    gap: var(--spacing-2);
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 300px;
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-dot.active {
    background: var(--primary-green);
    transform: scale(1.25);
}

.nav-dot:hover {
    background: var(--secondary-green);
    transform: scale(1.1);
}

/* Footer */
.app-footer {
    margin-top: var(--spacing-8);
    padding: var(--spacing-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-light);
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-4);
}

.footer-links {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
}

.footer-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.footer-btn:hover {
    background: var(--light-green);
    border-color: var(--primary-green);
    color: var(--primary-green);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-3);
    }
    
    .app-header {
        padding: var(--spacing-4);
        margin-bottom: var(--spacing-6);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-3);
        text-align: center;
    }
    
    .logo h1 {
        font-size: var(--font-size-xl);
    }
    
    .card-content {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .card-title {
        font-size: var(--font-size-xl);
    }
    
    .navigation-controls {
        flex-direction: column;
        gap: var(--spacing-6);
    }
    
    .nav-btn {
        min-width: 140px;
        padding: var(--spacing-4) var(--spacing-5);
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-dots {
        order: -1;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .card-content {
        padding: var(--spacing-5) var(--spacing-3);
    }
    
    .card-title {
        font-size: var(--font-size-lg);
    }
    
    .card-body {
        font-size: var(--font-size-sm);
    }
    
    .nav-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Animation Classes */
.card-enter {
    animation: cardEnter var(--transition-normal) ease-out;
}

.card-exit {
    animation: cardExit var(--transition-normal) ease-in;
}

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

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

/* Loading State */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Focus States for Accessibility */
.nav-btn:focus,
.footer-btn:focus,
.nav-dot:focus {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --shadow-soft: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.3);
        --shadow-large: 0 8px 16px rgba(0, 0, 0, 0.3);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .navigation-controls,
    .app-footer {
        display: none;
    }
    
    .flashcard {
        box-shadow: none;
        border: 1px solid #000;
    }
}