/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background 0.3s, color 0.3s;
    line-height: 1.6;
}

/* Form elements */
input, select, textarea {
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--input);
    color: var(--text);
    transition: background 0.3s, color 0.3s, border-color 0.3s;
    padding: 0.5rem;
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.15);
}

/* Button styles */
button {
    cursor: pointer;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-weight: 500;
    transition: background var(--transition-speed);
    padding: 0.5rem 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: background var(--transition-speed);
}

.btn-primary {
    background: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--tag);
    color: var(--text-secondary);
}
.btn-secondary:hover {
    background: var(--tag-hover);
}

.btn-danger {
    background: var(--danger);
}
.btn-danger:hover {
    background: var(--danger-hover);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* Container and layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.header {
    background: var(--card);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: background 0.3s;
}

/* Grid layout */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

/* Card styles */
.card {
    background: var(--card);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), background 0.3s;
    position: relative;
    display: flex;
    flex-direction: column;
}

.card:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: var(--modal);
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.modal.visible {
    opacity: 1;
}

.modal-content {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 2rem;
}

.modal-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform var(--transition-speed);
}

.modal.visible .modal-image {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    color: white;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity var(--transition-speed);
}

.close-modal:hover {
    opacity: 1;
}

/* Drop zone */
.drop-zone {
    border: 2px dashed var(--border);
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    background: var(--drop-zone-bg);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed), background 0.3s, border-color 0.3s;
}

.drop-zone:hover,
.drop-zone.drag-over {
    background: var(--drop-zone-hover-bg);
    border-color: var(--primary);
}

.drop-zone h2 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.drop-zone p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Delete button */
.delete-button {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(239, 71, 111, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: background var(--transition-speed);
}

.delete-button:hover {
    background: var(--danger);
}

/* Error container */
.error-container {
    background: var(--danger);
    color: white;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

/* Loading indicator */
.loading-indicator {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Search container */
.search-container {
    margin-bottom: 1.5rem;
    background: var(--card);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    transition: background 0.3s;
}

.search-form {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    flex-grow: 1;
    padding: 0.8rem;
    font-size: 1rem;
    min-width: 200px;
}

.search-button {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
}

/* Toggle switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--tag);
    border-radius: 24px;
    transition: background 0.3s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

/* Tags */
.tag {
    display: inline-flex;
    align-items: center;
    background: var(--tag);
    border-radius: 4px;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: background 0.3s;
}

.tag:hover {
    background: var(--tag-hover);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0.75rem;
    }
    
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }
    
    .search-form {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-input {
        min-width: auto;
    }
}