:root {
    --bg-color: #0f172a;
    /* Slate 900 */
    --card-bg: #1e293b;
    /* Slate 800 */
    --card-hover: #334155;
    /* Slate 700 */
    --text-main: #f8fafc;
    /* Slate 50 */
    --text-muted: #94a3b8;
    /* Slate 400 */

    --primary: #10b981;
    /* Emerald 500 - Minecraft-ish green */
    --primary-hover: #059669;
    /* Emerald 600 */
    --danger: #ef4444;
    /* Red 500 */

    --border-color: #334155;

    --grid-bg: #020617;
    /* Very dark slate for the capture area */
    --cell-bg: #1e293b;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* --- Header & Lang Selector --- */
.lang-selector {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    margin-bottom: -1rem;
    padding: 0.5rem 0;
}

.lang-icon {
    font-size: 1.2rem;
    user-select: none;
}

.lang-selector select {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: inherit;
}

.lang-selector select:focus {
    outline: none;
    border-color: var(--primary);
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* --- Layout --- */
.app-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 900px) {
    .app-layout {
        grid-template-columns: 1fr;
    }
}

/* --- Grid Section --- */
.grid-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.capture-area {
    background-color: var(--grid-bg);
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    /* Set a fixed square aspect ratio for the export */
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
}

/* Add a title inside the capture area so it appears in the downloaded image */
.capture-area::before {
    content: attr(data-title);
    display: block;
    text-align: center;
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: #fff;
    opacity: 0.9;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 12px;
    flex-grow: 1;
    /* take up remaining space below title */
}

.grid-cell {
    background-color: var(--cell-bg);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    transition: all 0.2s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.grid-cell:hover:empty {
    border-color: var(--text-muted);
    background-color: var(--card-hover);
}

.grid-cell:empty::after {
    content: "+";
    font-size: 2rem;
    color: var(--border-color);
}

.grid-cell.filled {
    border: 2px solid transparent;
    cursor: default;
}

/* Content inside a filled cell */
.mod-selected-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.mod-selected-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.4) 70%, transparent 100%);
    padding: 16px 8px 8px;
    text-align: center;
}

.mod-selected-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.2;
}

/* Remove button on cell hover */
.remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid-cell.filled:hover .remove-btn {
    opacity: 1;
}

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


/* --- Controls --- */
.controls {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 500px;
}

.controls-secondary {
    margin-bottom: 0.5rem;
}

.controls-primary {
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100%;
    max-width: 500px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 10px 16px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

#progress-text {
    color: var(--text-main);
}

.progress-remaining {
    color: var(--primary);
    background-color: rgba(16, 185, 129, 0.1);
    padding: 4px 10px;
    border-radius: 20px;
}

.progress-remaining.complete {
    color: var(--text-main);
    background-color: transparent;
}

.btn {
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary {
    background-color: var(--primary);
    color: white;
    flex-grow: 1;
}

.btn-primary:not(:disabled):hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--card-hover);
    color: var(--text-main);
}

.btn-danger {
    background-color: transparent;
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover:not(:disabled) {
    background-color: rgba(239, 68, 68, 0.1);
}

.btn-x {
    background-color: #000;
    color: #fff;
    border: 1px solid #333;
}

.btn-x:hover:not(:disabled) {
    background-color: #111;
}

.share-controls {
    width: 100%;
    max-width: 500px;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.share-controls .btn-x {
    width: 100%;
    border-radius: 9999px;
    padding: 12px 24px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* --- Search Section --- */
.search-section {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: 600px;
}

.search-box {
    display: flex;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.search-box input {
    flex-grow: 1;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-search {
    background-color: var(--card-hover);
    color: var(--text-main);
    white-space: nowrap;
}

.btn-search:hover {
    background-color: var(--border-color);
}

/* --- Search Results --- */
.search-results-container {
    flex-grow: 1;
    overflow-y: auto;
    /* Custom scrollbar */
    padding-right: 4px;
}

.search-results-container::-webkit-scrollbar {
    width: 6px;
}

.search-results-container::-webkit-scrollbar-track {
    background: transparent;
}

.search-results-container::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 10px;
}

.search-results {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mod-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mod-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.mod-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
    background-color: var(--card-bg);
}

.mod-info {
    flex-grow: 1;
    overflow: hidden;
}

.mod-name {
    font-weight: 600;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.mod-author {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.mod-add-btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.mod-item:hover .mod-add-btn {
    background-color: rgba(16, 185, 129, 0.1);
}

/* --- Utility Classes --- */
.hidden {
    display: none !important;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 1rem;
}

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

.error-message {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(239, 68, 68, 0.2);
    margin-bottom: 1rem;
}

footer {
    margin-top: auto;
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}