/* ==========================================
   GRAMMAR PAGE STYLES
   ========================================== */

.page-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

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

.page-header p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* Grammar Container */
.grammar-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Sidebar */
.grammar-sidebar {
    position: relative;
}

.sidebar-sticky {
    position: sticky;
    top: 100px;
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 15px var(--shadow);
}

.sidebar-sticky h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-primary);
    color: var(--primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

.sidebar-link i {
    font-size: 1.1rem;
    color: var(--primary);
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--bg-primary);
    color: var(--primary);
    transform: translateX(5px);
}

/* Grammar Content */
.grammar-content {
    min-width: 0;
}

.lesson-section {
    margin-bottom: var(--spacing-xl);
}

.lesson-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    font-family: var(--font-primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lesson-title i {
    font-size: 2rem;
}

/* Lesson Card */
.lesson-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 15px var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.lesson-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-primary);
    color: var(--text-primary);
}

.lesson-intro {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary);
    margin-bottom: var(--spacing-lg);
}

.lesson-intro p {
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Rule Box */
.rule-box {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(79, 70, 229, 0.05) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 2px solid rgba(79, 70, 229, 0.2);
}

.rule-box h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rule-box ul {
    list-style: none;
    padding-left: 0;
}

.rule-box li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.rule-box li:last-child {
    border-bottom: none;
}

/* Example Box */
.example-box {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
    background: var(--bg-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
}

.example-en {
    font-weight: 600;
    color: var(--primary);
    font-size: 1.05rem;
}

.example-fr {
    color: var(--text-secondary);
    font-style: italic;
}

/* Attention Box */
.attention-box {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 2px solid rgba(245, 158, 11, 0.3);
}

.attention-box h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.attention-box ul {
    list-style: none;
    padding-left: 0;
}

.attention-box li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.attention-box li::before {
    content: '⚠';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Examples Section */
.examples-section {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.examples-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.example-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--secondary);
}

.example-item:last-child {
    margin-bottom: 0;
}

.example-item p {
    margin-bottom: 0.25rem;
}

.example-item .example-en {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.example-item .example-fr {
    color: var(--text-secondary);
    font-style: italic;
}

/* Formula Box */
.formula-box {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
}

.formula-box p {
    font-family: 'Courier New', monospace;
    background: rgba(79, 70, 229, 0.1);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    border-left: 3px solid var(--primary);
}

.formula-box p:last-child {
    margin-bottom: 0;
}

/* Conjugation Table */
.conjugation-table {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.conjugation-table h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.conjugation-table table {
    width: 100%;
    border-collapse: collapse;
}

.conjugation-table th,
.conjugation-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.conjugation-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--primary);
}

.conjugation-table tr:hover {
    background: var(--bg-secondary);
}

.conjugation-table tr:last-child td {
    border-bottom: none;
}

/* Comparison Box */
.comparison-box,
.comparison-table {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.comparison-box h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.comparison-col,
.with-article,
.without-article {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.comparison-col strong,
.with-article strong,
.without-article strong {
    display: block;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.comparison-col p,
.with-article p,
.without-article p {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.comparison-col small,
.with-article small,
.without-article small {
    color: var(--text-secondary);
    font-style: italic;
}

/* Practice Link */
.practice-link {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px dashed var(--border);
}

/* Quick Navigation */
.quick-nav {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 100;
}

.quick-nav-btn {
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--shadow-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.quick-nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-lg);
}

.quick-nav-btn.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

/* Responsive */
@media (max-width: 968px) {
    .grammar-container {
        grid-template-columns: 1fr;
    }
    
    .grammar-sidebar {
        order: 2;
    }
    
    .sidebar-sticky {
        position: static;
    }
    
    .grammar-content {
        order: 1;
    }
    
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .quick-nav {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .quick-nav-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .lesson-title {
        font-size: 1.8rem;
    }
    
    .lesson-card {
        padding: var(--spacing-md);
    }
    
    .conjugation-table {
        overflow-x: auto;
    }
    
    .conjugation-table table {
        font-size: 0.9rem;
    }
}