/* 
    Search Functionality Styles
    
    This file contains styles for the site-wide search feature.
    Students can learn how to style search interfaces and create
    accessible, user-friendly search experiences.
*/

/* 
    Search Container
    
    Contains the search input and button, centered in the header.
*/
.search-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;  /* Centers the search horizontally */
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
    border-top: 1px solid var(--border-color, #e2e8f0);
    width: 100%;
    max-width: 600px;  /* Limits width for better appearance */
    margin-left: auto;
    margin-right: auto;
}

/* 
    Search Input
    
    Text input where users type their search queries.
*/
.search-input {
    padding: 0.5rem 1rem;
    padding-right: 2.5rem;
    border: 2px solid var(--border-color, #e2e8f0);
    border-radius: 20px;
    font-size: 0.9rem;
    width: 100%;
    max-width: 500px;
    transition: all 0.2s ease;
    background-color: white;
    flex: 1;
    margin: 0 auto;  /* Centers the input within container */
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
    color: #94a3b8;
}

/* 
    Search Button
    
    Button to trigger search (though Enter key also works).
*/
.search-button,
.search-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    color: var(--text-color, #334155);
    transition: color 0.2s ease;
    line-height: 1;
}

.search-button:hover,
.search-close:hover {
    color: var(--primary-color, #2563eb);
}

.search-button:focus,
.search-close:focus {
    outline: 2px solid var(--primary-color, #2563eb);
    outline-offset: 2px;
    border-radius: 4px;
}

/* 
    Search Results Container
    
    Displays the search results below the search input.
*/
.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.5rem;
    background-color: white;
    border: 2px solid var(--border-color, #e2e8f0);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-height: 500px;
    overflow-y: auto;
    z-index: 1000;
    padding: 1rem;
}

.search-results-header {
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color, #e2e8f0);
    color: var(--text-color, #334155);
    font-size: 0.9rem;
}

.search-results-header strong {
    color: var(--primary-color, #2563eb);
}

/* 
    Search Results Groups
    
    Groups results by type (Lesson, Guide, Concept, etc.).
*/
.search-results-group {
    margin-bottom: 1.5rem;
}

.search-results-group:last-child {
    margin-bottom: 0;
}

.search-results-type {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

/* 
    Individual Result Card
    
    Each search result is displayed as a card with title,
    description, and URL.
*/
.search-result-card {
    padding: 1rem;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    transition: all 0.2s ease;
    background-color: #f8fafc;
}

.search-result-card:hover {
    background-color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.search-result-card:last-child {
    margin-bottom: 0;
}

.search-result-card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.search-result-card h4 a {
    color: var(--primary-color, #2563eb);
    text-decoration: none;
    font-weight: 600;
}

.search-result-card h4 a:hover {
    text-decoration: underline;
}

.search-result-card h4 a mark {
    background-color: #fef08a;
    color: #78350f;
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
    font-weight: 700;
}

.search-result-description {
    color: var(--text-color, #334155);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0.5rem 0;
}

.search-result-description mark {
    background-color: #fef08a;
    color: #78350f;
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
    font-weight: 500;
}

.search-result-url {
    display: block;
    font-size: 0.75rem;
    color: #64748b;
    font-family: 'Courier New', Courier, monospace;
    margin-top: 0.5rem;
}

/* 
    Empty State
    
    Shown when no results are found.
*/
.search-results-empty {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-color, #334155);
}

.search-results-empty p {
    margin-bottom: 1rem;
}

.search-suggestions {
    font-size: 0.9rem;
    color: #64748b;
}

.search-suggestions a {
    color: var(--primary-color, #2563eb);
    text-decoration: none;
}

.search-suggestions a:hover {
    text-decoration: underline;
}

/* 
    Responsive Design
    
    On smaller screens, adjust search input width and results positioning.
*/
@media (max-width: 768px) {
    .search-container {
        width: 100%;
        max-width: 100%;
        margin: 1rem auto;
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .search-input {
        width: 100%;
        flex: 1;
    }
    
    .search-input:focus {
        width: 100%;
    }
    
    .search-results {
        position: fixed;
        top: auto;
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
        max-height: 60vh;
    }
}

/* 
    Search in navigation bar appears below menu, centered
*/
.navbar.minimal .search-container {
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .navbar.minimal .search-container {
        margin-top: 0.5rem;
        padding-top: 0.5rem;
    }
}