/* ============================================================
   أنماط صفحات المعرفة اللغوية (learn/)
   ============================================================ */

.learn-hero {
    background: linear-gradient(135deg, #1a5c2e 0%, #2fae28 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.learn-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("images/bg.jpg");
    background-size: cover;
    opacity: 0.07;
}

.learn-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.learn-hero h1 { font-size: 2.25rem; color: white; margin-bottom: var(--spacing-sm); }
.learn-hero p  { font-size: 1.1rem; color: rgba(255,255,255,0.88); max-width: 640px; margin: 0 auto; }

/* --- شريط التنقل --- */
.learn-nav-bar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.learn-nav-bar .container {
    display: flex;
    align-items: center;
    overflow-x: auto;
    scrollbar-width: none;
}

.learn-nav-bar .container::-webkit-scrollbar { display: none; }

.learn-nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 13px var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-fast);
}

.learn-nav-link:hover  { color: var(--primary-color); border-bottom-color: rgba(47,174,40,0.4); }
.learn-nav-link.active { color: var(--primary-color); border-bottom-color: var(--primary-color); font-weight: 500; }

/* --- تخطيط صفحة المقالة --- */
.learn-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-areas: "sidebar content";
    gap: var(--spacing-xxl);
    padding: var(--spacing-xxl) 0;
    align-items: start;
}

/* --- محتوى المقالة --- */
.learn-article {
    grid-area: content;
    min-width: 0;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.article-category {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background-color: rgba(47,174,40,0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
}

.article-read-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.learn-article h1 {
    font-size: 2rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
}

.article-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

/* --- أقسام المقالة --- */
.learn-article h2 {
    font-size: 1.4rem;
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-md);
    border-right: 4px solid var(--primary-color);
    color: var(--text-primary);
}

.learn-article h3 {
    font-size: 1.15rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
}

.learn-article p {
    line-height: 1.85;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.learn-article ul,
.learn-article ol {
    padding-right: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.learn-article li {
    line-height: 1.8;
    margin-bottom: var(--spacing-xs);
}

/* --- جدول الأمثلة --- */
.examples-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    font-size: 0.95rem;
}

.examples-table th {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    text-align: right;
    font-weight: 600;
    font-size: 0.875rem;
}

.examples-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.examples-table tr:nth-child(even) td {
    background-color: var(--bg-secondary);
}

.examples-table .arabic-word {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* --- بطاقة القاعدة --- */
.rule-card {
    background: linear-gradient(135deg, rgba(47,174,40,0.05) 0%, rgba(47,174,40,0.1) 100%);
    border: 1px solid rgba(47,174,40,0.25);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.rule-card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.rule-card p {
    margin-bottom: 0;
    line-height: 1.8;
}

/* --- بطاقة تنبيه --- */
.note-card {
    background-color: rgba(251,191,36,0.08);
    border: 1px solid rgba(251,191,36,0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    display: flex;
    gap: var(--spacing-md);
}

.note-card i { color: #d97706; font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }
.note-card p { margin: 0; line-height: 1.7; }

/* --- مجموعة الأمثلة البارزة --- */
.example-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.example-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.example-chip:hover {
    border-color: var(--primary-color);
    background-color: rgba(47,174,40,0.05);
}

.example-chip .chip-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* --- الشريط الجانبي للمقالة --- */
.learn-sidebar {
    grid-area: sidebar;
    position: sticky;
    top: 56px;
}

.sidebar-toc {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.sidebar-toc-title {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-list a {
    display: block;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-right: 2px solid transparent;
    transition: all var(--transition-fast);
}

.toc-list a:hover {
    color: var(--primary-color);
    border-right-color: var(--primary-color);
    background-color: rgba(47,174,40,0.05);
}

.sidebar-tool-link {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    text-decoration: none;
    display: block;
    transition: opacity var(--transition-fast);
    margin-bottom: var(--spacing-lg);
}

.sidebar-tool-link:hover { opacity: 0.9; }
.sidebar-tool-link i { font-size: 1.5rem; margin-bottom: 8px; }
.sidebar-tool-link div { font-size: 0.9rem; font-weight: 500; color: white; }
.sidebar-tool-link small { font-size: 0.78rem; color: rgba(255,255,255,0.8); }

.related-articles {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.related-articles-title {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.related-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.related-list a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px;
    font-size: 0.875rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.related-list a:hover { color: var(--primary-color); background-color: rgba(47,174,40,0.05); }
.related-list a i { color: var(--text-secondary); font-size: 0.75rem; }

/* --- بطاقات المقالات (الصفحة الرئيسية) --- */
.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.learn-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.learn-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.learn-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: rgba(47,174,40,0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.learn-card-title { font-size: 1.05rem; font-weight: 600; color: var(--text-primary); }
.learn-card-desc  { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; flex: 1; }

/* --- استجابة --- */
@media (max-width: 1024px) {
    .learn-layout {
        grid-template-columns: 240px 1fr;
        grid-template-areas: "sidebar content";
    }
}

@media (max-width: 768px) {
    .learn-layout {
        grid-template-columns: 1fr;
        grid-template-areas: "content";
    }
    .learn-sidebar { position: static; display: none; }
    .learn-article h1 { font-size: 1.5rem; }
    .learn-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .learn-grid { grid-template-columns: 1fr; }
    .examples-table { font-size: 0.85rem; }
}