/* ===== CSS VARIABLES & THEMING ===== */

:root {
    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f1f3;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #e0e0e0;
    --accent-primary: #2563eb;
    --accent-secondary: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #3b82f6;
    --accent-success: #10b981;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
}

body.dark-theme {
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #999999;
    --border-color: #404040;
    --accent-primary: #3b82f6;
    --accent-secondary: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #60a5fa;
    --accent-success: #10b981;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

/* ===== RESET & GLOBAL STYLES ===== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

/* ===== CONTAINER ===== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ===== HEADER ===== */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 1rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-content h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* ===== BUTTONS ===== */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--accent-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background-color: var(--accent-warning);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background-color: #d97706;
    transform: translateY(-1px);
}

.btn-info {
    background-color: var(--accent-info);
    color: white;
}

.btn-info:hover:not(:disabled) {
    background-color: #2563eb;
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--accent-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background-color: #059669;
    transform: translateY(-1px);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.btn-icon:hover {
    background-color: var(--border-color);
    transform: scale(1.05);
}

.btn-pagination {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
}

.btn-pagination:hover:not(:disabled) {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

/* ===== GALLERY CONTROLS ===== */

.gallery-controls {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.controls-section h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.4rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.filter-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.filter-btn.active {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.view-filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.view-filters label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    cursor: pointer;
}

/* ===== CALENDAR ===== */

.calendar-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.calendar-month {
    font-weight: 600;
    min-width: 150px;
    text-align: center;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.calendar-day-header {
    text-align: center;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.5rem 0;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    background-color: var(--bg-primary);
    transition: all 0.2s;
    font-size: 0.85rem;
    padding: 0.25rem;
}

.calendar-day:hover {
    background-color: var(--border-color);
}

.calendar-day.has-images {
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.calendar-day.selected {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.calendar-day.other-month {
    opacity: 0.4;
    cursor: default;
}

.calendar-day-number {
    display: block;
}

.calendar-day-count {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.calendar-day.has-images .calendar-day-count {
    color: var(--accent-primary);
}

.calendar-day.selected .calendar-day-count {
    color: white;
}

/* ===== GALLERY BY DATE ===== */

.gallery-by-date-container {
    margin-bottom: 3rem;
}

.selected-date-info {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.selected-date-info p {
    margin: 0;
    font-weight: 500;
}

.date-group {
    margin-bottom: 3rem;
}

.date-group-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.date-group-header h2 {
    margin: 0;
    font-size: 1.3rem;
    flex-grow: 1;
}

.date-group-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.date-group-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.gallery-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

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

.gallery-item-image {
    width: 100%;
    height: 225px;
    object-fit: cover;
    background-color: var(--bg-tertiary);
}

.gallery-item-info {
    padding: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.gallery-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.gallery-item-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.gallery-item-favorite {
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.gallery-item-favorite:hover,
.gallery-item-favorite.is-favorite {
    opacity: 1;
}

.gallery-item-label {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.4;
    word-break: break-word;
}

.gallery-item-label.empty {
    color: var(--text-tertiary);
    font-style: italic;
}

/* ===== ADMIN STYLES ===== */

.admin-toolbar {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.toolbar-section {
    margin-bottom: 1.5rem;
}

.toolbar-section:last-child {
    margin-bottom: 0;
}

.toolbar-section h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.tab-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.4rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.tab-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.tab-btn.active {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.bulk-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.bulk-actions label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    cursor: pointer;
}

.bulk-actions input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    cursor: pointer;
}

.sync-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.admin-dates-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.admin-date-group {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
}

.admin-date-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.admin-date-header > div {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.admin-date-header h3 {
    margin: 0;
    font-size: 1.1rem;
}

.admin-gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.admin-gallery-item {
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}

.admin-gallery-item:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.admin-gallery-item.selected {
    border-color: var(--accent-primary);
    background-color: var(--bg-tertiary);
}

.admin-gallery-item-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    background-color: var(--bg-tertiary);
}

.admin-gallery-item-checkbox {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

.admin-gallery-item-favorite-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.admin-gallery-item-favorite-btn:hover,
.admin-gallery-item-favorite-btn.is-favorite {
    opacity: 1;
}

.admin-gallery-item-info {
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: background-color 0.2s;
}

.admin-gallery-item:hover .admin-gallery-item-info {
    background-color: var(--bg-tertiary);
}

.admin-gallery-item-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    word-break: break-all;
    line-height: 1.3;
}

/* ===== LIGHTBOX ===== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.lightbox-close {
    position: absolute;
    top: -2.5rem;
    right: 0;
    background: none;
    border: none;
    font-size: 2.5rem;
    color: white;
    cursor: pointer;
    padding: 0;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close:hover {
    opacity: 0.7;
}

#lightboxImage {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    margin-bottom: 1rem;
}

.lightbox-info {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.lightbox-date {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.lightbox-label {
    font-size: 1rem;
}

.lightbox-filename {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: monospace;
    margin-top: 0.75rem;
    word-break: break-all;
    padding: 0.5rem;
    background-color: var(--bg-secondary);
    border-radius: 0.25rem;
}

.lightbox-nav {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ===== LOGIN STYLES ===== */

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: 2rem;
}

.login-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.login-box h2 {
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.login-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-help {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.login-help a {
    color: var(--accent-primary);
    text-decoration: none;
}

.login-help a:hover {
    text-decoration: underline;
}

/* ===== MODAL STYLES ===== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    padding: 1rem;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content h2 {
    margin-bottom: 1rem;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: flex-end;
}

.modal-buttons .btn {
    flex: 1;
}

/* ===== EDIT IMAGE MODAL ===== */

.edit-image-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.edit-image-preview {
    background-color: var(--bg-tertiary);
    border-radius: 0.5rem;
    padding: 1rem;
}

.edit-image-preview img {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
}

.edit-image-form h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    word-break: break-all;
}

.image-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ===== MESSAGES ===== */

.no-images {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.error-message {
    color: var(--accent-danger);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: rgba(239, 68, 68, 0.1);
    border-radius: 0.4rem;
    border-left: 3px solid var(--accent-danger);
}

.success-message {
    color: var(--accent-success);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: rgba(16, 185, 129, 0.1);
    border-radius: 0.4rem;
    border-left: 3px solid var(--accent-success);
}

/* ===== LOADING SPINNER ===== */

.loading {
    text-align: center;
    padding: 3rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 1024px) {
    .gallery-controls {
        grid-template-columns: 1fr;
    }

    .edit-image-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem;
    }

    .header-content h1 {
        font-size: 1.5rem;
    }

    .gallery-controls {
        padding: 1.5rem;
    }

    .gallery-by-date {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .admin-gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 0.75rem;
    }

    .login-box {
        padding: 2rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .bulk-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .bulk-actions .btn {
        width: 100%;
    }

    .calendar-grid {
        gap: 0.25rem;
    }

    .calendar-day {
        font-size: 0.7rem;
        padding: 0.1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1rem;
        gap: 0.5rem;
    }

    .header-content h1 {
        font-size: 1.25rem;
    }

    .subtitle {
        display: none;
    }

    .gallery-controls {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1.5rem;
    }

    .filter-buttons {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
    }

    .date-group-gallery {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .admin-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .admin-gallery-item-image {
        height: 80px;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .btn-large {
        padding: 0.8rem 1.5rem;
    }

    .bulk-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .bulk-actions .btn {
        width: 100%;
        padding: 0.5rem;
    }

    .login-box {
        padding: 1.5rem;
    }

    .modal-content {
        padding: 1rem;
        border-radius: 0.5rem;
    }

    .modal-buttons {
        flex-direction: column;
    }

    .modal-buttons .btn {
        width: 100%;
    }

    .tab-buttons {
        flex-wrap: wrap;
    }

    .tab-btn {
        flex: 1;
    }

    .calendar-day {
        font-size: 0.6rem;
    }

    .calendar-day-number {
        line-height: 1;
    }

    .calendar-grid {
        gap: 0.2rem;
    }
}

/* ===== UTILITY CLASSES ===== */

main {
    margin-bottom: 3rem;
}

a {
    color: inherit;
}

input[type="checkbox"],
input[type="radio"] {
    accent-color: var(--accent-primary);
}