/* BEM Naming Convention - Block Element Modifier */

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

:root {
    --color-primary: #2c3e50;
    --color-secondary: #3498db;
    --color-accent: #e74c3c;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #f5f5f5;
    --color-white: #ffffff;
    --color-border: #ddd;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --border-radius: 4px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Header Block */
.header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__title {
    font-size: 1.5rem;
    font-weight: 600;
}

.header__nav {
    display: flex;
    gap: var(--spacing-sm);
}

.header__nav-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.header__nav-button:hover {
    background-color: #2980b9;
}

.header__nav-button--hidden {
    display: none;
}

/* Main Block */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Search Section */
.search-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
}

.search-container {
    max-width: 1000px;
    margin: 0 auto;
}

.search-form {
    margin-bottom: var(--spacing-md);
}

.search-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    position: relative;
}

.search-input {
    flex: 1;
    padding: 20px 24px;
    font-size: 1.4rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
    min-height: 64px;
    line-height: 1.5;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.search-button {
    padding: 20px 40px;
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: 500;
    transition: var(--transition);
    min-height: 64px;
    white-space: nowrap;
}

.search-button:hover {
    background-color: #2980b9;
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-top: 4px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.search-suggestions.show {
    display: block;
}

.search-suggestion-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--color-bg);
}

.search-suggestion-item:hover {
    background-color: var(--color-bg);
}

.search-suggestion-item:last-child {
    border-bottom: none;
}

.advanced-search-link {
    display: inline-block;
    color: var(--color-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.advanced-search-link:hover {
    text-decoration: underline;
}

/* Search Block (legacy) */
.search {
    margin-bottom: var(--spacing-lg);
}

.search__container {
    max-width: 600px;
    margin: 0 auto;
}

.search__form {
    display: flex;
    gap: var(--spacing-sm);
}

.search__input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.search__input:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.search__button {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.search__button:hover {
    background-color: #2980b9;
}

/* Filters Block */
.filters {
    margin-bottom: var(--spacing-lg);
}

.filters__container {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.filters__label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.filters__select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

.filters__clear {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-text-light);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
}

.filters__clear:hover {
    background-color: var(--color-text);
}

/* Gallery Block */
.gallery {
    margin-bottom: var(--spacing-xl);
}

.gallery__container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.gallery__loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.gallery__item {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: var(--transition);
}

.gallery__item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.gallery__load-more {
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.gallery__load-more--hidden {
    display: none;
}

.gallery__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.gallery__info {
    padding: var(--spacing-sm);
}

.gallery__title {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.gallery__meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* Pagination Block */
.pagination {
    margin-top: var(--spacing-xl);
}

.pagination__container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.pagination__button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.pagination__button:hover:not(:disabled) {
    background-color: #2980b9;
}

.pagination__button:disabled {
    background-color: var(--color-border);
    cursor: not-allowed;
}

.pagination__info {
    font-weight: 500;
}

/* Modal Block */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal--hidden {
    display: none;
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1001;
}

.modal__content {
    position: relative;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1002;
    padding: var(--spacing-lg);
}

.modal__content--small {
    max-width: 400px;
}

.modal__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-text-light);
    cursor: pointer;
    line-height: 1;
    z-index: 1003;
}

.modal__close:hover {
    color: var(--color-text);
}

.modal__title {
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.modal__image-container {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modal__image {
    max-width: 100%;
    max-height: 60vh;
    border-radius: var(--border-radius);
}

.modal__info {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
}

.modal__info-item {
    margin-bottom: var(--spacing-sm);
}

.modal__info-label {
    font-weight: 600;
    margin-right: var(--spacing-sm);
}

.modal__annotations {
    margin-top: var(--spacing-lg);
}

.modal__annotations-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
}

.modal__annotations-list {
    margin-bottom: var(--spacing-md);
}

.modal__annotation {
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
}

.modal__annotation-author {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.modal__annotation-content {
    font-size: 0.9rem;
    color: var(--color-text);
}

.modal__annotation-form {
    margin-top: var(--spacing-md);
}

.modal__annotation-form--hidden {
    display: none;
}

.modal__annotation-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
}

.modal__annotation-submit {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.modal__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.modal__label {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    font-weight: 500;
}

.modal__input {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.modal__submit {
    padding: var(--spacing-md);
    background-color: var(--color-secondary);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
}

.modal__switch {
    margin-top: var(--spacing-md);
    text-align: center;
    font-size: 0.9rem;
}

.modal__link {
    background: none;
    border: none;
    color: var(--color-secondary);
    cursor: pointer;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .gallery__container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .header__container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .filters__container {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}