/**
 * Lesson Directory Styles
 * 
 * This file contains styles for lesson directory/listing pages.
 * It uses CSS variables defined in variables.css for theming.
 */

/* || Lesson Directory Wrapper */

#lesson-directory-wrapper {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

#lesson-directory-wrapper > #lesson-header {
    margin-bottom: 2rem;
    text-align: center;
}

#lesson-directory-wrapper > #lesson-header > h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

#lesson-directory-wrapper > #lesson-header > p {
    font-size: 1.1rem;
    color: var(--colour-secondary);
    margin-top: 0;
    line-height: 1.5;
}

/* || Lesson Search Box */

#lesson-search-box {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

#lesson-search-input {
    width: 100%;
    max-width: 600px;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-medium);
    background-color: var(--bg-surface);
    color: var(--colour-primary);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#lesson-search-input::placeholder {
    color: var(--colour-secondary);
}

#lesson-search-input:focus {
    outline: none;
    border-color: var(--colour-accent);
    box-shadow: 0 0 0 3px var(--colour-accent-soft);
}

/* || Lesson Categories */

.lesson-category {
    font-size: 1.75rem;
    margin: 2rem 0 1rem 0;
    color: var(--colour-accent);
    border-bottom: 2px solid var(--border-subtle);
    padding-bottom: 0.5rem;
}

/* || Lesson Grid */

.lesson-category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Sort items by relevance score during search */
#lesson-directory-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.lesson-category,
.lesson-category-grid {
    order: 0;
}

.lesson-category-grid .lesson-item {
    order: 0;
}

/* Responsive breakpoints */
/* See https://www.w3schools.com/howto/howto_css_media_query_breakpoints.asp */

@media (max-width: 1200px) {
    .lesson-category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .lesson-category-grid {
        grid-template-columns: 1fr;
    }
    
    #lesson-directory-wrapper {
        padding: 1rem;
    }
    
    #lesson-directory-wrapper > #lesson-header > h1 {
        font-size: 2rem;
    }
    
    .lesson-category {
        font-size: 1.5rem;
    }
}

@media (max-width: 600px) {
    #lesson-directory-wrapper {
        padding: 0.75rem;
    }

    #lesson-directory-wrapper > #lesson-header > h1 {
        font-size: 1.75rem;
        margin-bottom: 1.5rem;
    }

    #lesson-search-input {
        font-size: 0.95rem;
        padding: 0.7rem 1rem;
    }

    .lesson-item {
        padding: 1.1rem;
    }

    .lesson-title {
        font-size: 1.1rem;
    }

    .lesson-summary {
        font-size: 0.9rem;
    }
}

/* || Lesson Items */

.lesson-item {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-round);
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-surface-muted) 100%);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 150px;
}

.lesson-item:hover {
    background: linear-gradient(135deg, var(--bg-surface-muted) 0%, var(--bg-surface) 100%);
    border-color: var(--colour-accent);
    transform: scale(1.02);
    box-shadow: var(--shadow-soft);
}

.lesson-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 0.75rem 0;
    color: var(--colour-primary);
}

.lesson-summary {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--colour-secondary);
    margin: 0;
    flex-grow: 1;
}