:root {
    /* Tailwind Neutral Palette */
    --neutral-900: #171717;
    --neutral-800: #262626;
    --neutral-700: #404040;
    --neutral-600: #525252;
    --neutral-500: #737373;
    --neutral-400: #a3a3a3;
    --neutral-300: #d4d4d4;
    --neutral-200: #e5e5e5;
    --neutral-100: #f5f5f5;
    --white: #ffffff;

    /* Tailwind Emerald Palette */
    --emerald-400: #34d399;
    --emerald-500: #10b981;
    --emerald-600: #059669;
    --emerald-700: #047857;

    --bg-color: var(--neutral-900);
    --sidebar-bg: var(--neutral-900);
    --sidebar-border: var(--neutral-700);
    --card-bg: var(--neutral-800);
    --text-main: var(--white);
    --text-muted: var(--neutral-400);
    --accent-color: var(--emerald-400);
    --accent-hover: var(--emerald-500);

    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-main);
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: flex;
}

/* Layout */
#app-container {
    display: flex;
    width: 100%;
    height: 100%;
}

#viewer-container {
    flex: 1;
    position: relative;
    background: linear-gradient(to bottom, #262626, #171717);
    overflow: hidden;
}

#viewer {
    width: 100%;
    height: 100%;
    display: block;
    background-color: #000;
    /* Prevent white flash */
}

#sidebar {
    width: 24rem;
    height: 100%;
    background-color: var(--sidebar-bg);
    border-left: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    z-index: 10;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.25);
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    background-color: var(--neutral-900);
}

.app-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

/* Components */
.btn {
    width: 100%;
    padding: 0.5rem 1rem;
    background-color: var(--neutral-800);
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: 1px solid rgba(16, 185, 129, 0.3);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:hover {
    background-color: var(--neutral-700);
}

.btn:focus,
.btn:focus-visible {
    outline: none;
    box-shadow: none;
}

.btn-primary {
    background-color: var(--emerald-600);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    background-color: var(--emerald-500);
}

.btn-group {
    display: flex;
    background-color: var(--neutral-800);
    padding: 0.25rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

.btn-toggle {
    flex: 1;
    padding: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 0.375rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    background: transparent;
    color: var(--neutral-400);
}

.btn-toggle:hover {
    color: var(--white);
}

.btn-toggle:focus,
.btn-toggle:focus-visible {
    outline: none;
    box-shadow: none;
}

.btn-toggle.active {
    background-color: var(--emerald-700);
    color: var(--white);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Info Card */
.info-card {
    margin-top: 1rem;
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
}

.info-label {
    font-size: 0.875rem;
    color: var(--neutral-400);
    margin-bottom: 0.25rem;
}

.info-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    word-break: break-all;
}

.info-meta {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--neutral-500);
}

/* Materials Section */
.sidebar-section {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    max-height: 12rem;
    overflow-y: auto;
}

.section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--neutral-300);
    margin-bottom: 0.5rem;
}

.material-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.material-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--neutral-800);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
}

.material-name {
    color: var(--neutral-400);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 70%;
}

.material-count {
    color: var(--emerald-500);
    font-family: monospace;
}

/* Settings / Tools Section */
.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background-color: var(--neutral-900);
}

.content-header {
    padding: 1rem;
    border-bottom: 1px solid var(--neutral-800);
    background-color: rgba(23, 23, 23, 0.5);
    backdrop-filter: blur(4px);
}

.content-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Inputs & Sliders */
.input-group {
    background-color: var(--neutral-800);
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.input-label {
    display: block;
    font-size: 0.75rem;
    color: var(--neutral-400);
    margin-bottom: 0.5rem;
}

input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: var(--neutral-700);
    border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--emerald-500);
    margin-top: -6px;
    cursor: pointer;
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Remove focus outline from sliders */
input[type="range"]:focus {
    outline: none;
    box-shadow: none;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--neutral-700);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neutral-600);
}

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

/* Landing Page */
#landing-page {
    position: absolute;
    inset: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--neutral-900);
    transition: opacity 0.5s ease;
}

#landing-page.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Overlay Title (Top Left) - Only visible when viewer is active */
.overlay-title {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    pointer-events: none;
    opacity: 0;
    /* Hidden initially */
    transition: opacity 0.5s ease;
}

.overlay-title.visible {
    opacity: 1;
}

.overlay-title h1 {
    font-size: 1.125rem;
    /* text-lg */
    font-weight: 700;
    letter-spacing: 0.025em;
    margin: 0;
}

.overlay-title span {
    color: var(--emerald-400);
    font-weight: 300;
}

.overlay-subtitle {
    font-size: 0.75rem;
    color: var(--neutral-300);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* Controls Hint (Bottom Left) */
.overlay-hint {
    position: absolute;
    bottom: 1.5rem;
    /* Adjusted for single row */
    left: 1rem;
    transform: none;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    pointer-events: none;
    font-size: 0.75rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    transition: opacity 0.5s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.overlay-hint.visible {
    opacity: 1;
}

.hint-item {
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.hint-item i {
    width: 16px;
    text-align: center;
    color: var(--emerald-400);
    margin-right: 0.25rem;
    font-size: 0.8rem;
}

/* Coordinates Info (Merged into Hint) */
.overlay-coords {
    /* Position removed, now part of flex layout */
    color: var(--emerald-400);
    font-family: monospace;
    font-size: 0.9rem;
    white-space: nowrap;
}

.overlay-coords.visible {
    opacity: 1;
}

/* Slider with Buttons */
.slider-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slider-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--neutral-800);
    border: 1px solid var(--neutral-700);
    border-radius: 0.25rem;
    color: var(--emerald-500);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
    flex-shrink: 0;
}

.slider-btn:hover {
    background-color: var(--neutral-700);
    color: var(--white);
    border-color: var(--neutral-600);
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.overlay-title span {
    color: var(--emerald-400);
    font-weight: 300;
}

.overlay-subtitle {
    font-size: 0.75rem;
    color: var(--neutral-300);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* Controls Hint (Bottom Left) */
.overlay-hint {
    position: absolute;
    bottom: 1.5rem;
    /* Adjusted for single row */
    left: 1rem;
    transform: none;
    z-index: 10;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    pointer-events: none;
    font-size: 0.75rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    transition: opacity 0.5s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.overlay-hint.visible {
    opacity: 1;
}

.hint-item {
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.hint-item i {
    width: 16px;
    text-align: center;
    color: var(--emerald-400);
    margin-right: 0.25rem;
    font-size: 0.8rem;
}

/* Coordinates Info (Merged into Hint) */
.overlay-coords {
    /* Position removed, now part of flex layout */
    color: var(--emerald-400);
    font-family: monospace;
    font-size: 0.9rem;
    white-space: nowrap;
}

.overlay-coords.visible {
    opacity: 1;
}

/* Slider with Buttons */
.slider-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slider-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--neutral-800);
    border: 1px solid var(--neutral-700);
    border-radius: 0.25rem;
    color: var(--emerald-500);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
    flex-shrink: 0;
}

.slider-btn:hover {
    background-color: var(--neutral-700);
    color: var(--white);
    border-color: var(--neutral-600);
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.material-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-replace {
    background-color: transparent;
    border: 1px solid var(--neutral-600);
    color: var(--neutral-400);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.btn-replace:hover {
    border-color: var(--emerald-500);
    color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.1);
}

/* Block Info Tooltip */
.block-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.block-tooltip.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-icon .block-icon {
    width: 32px;
    height: 32px;
}

.tooltip-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tooltip-name-cn {
    font-size: 15px;
}

.slider-btn:active {
    transform: scale(0.95);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Confirmation Modal */
#confirmation-modal {
    z-index: 1200;
}

.btn-replace-tooltip {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 12px;
    pointer-events: auto;
    white-space: nowrap;
}

.btn-replace-tooltip:hover {
    background-color: rgba(16, 185, 129, 0.2);
    border-color: var(--emerald-500);
    color: var(--emerald-500);
}

/* Sidebar Footer (Ads & QQ Groups) */
.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ad-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ad-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background-color: rgba(234, 179, 8, 0.1);
    /* Yellow tint */
    border: 1px solid rgba(234, 179, 8, 0.3);
    color: var(--yellow-400);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    text-align: center;
}

.ad-btn:hover {
    background-color: rgba(234, 179, 8, 0.2);
    border-color: var(--yellow-400);
}

.qq-group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.qq-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem;
    background-color: var(--neutral-800);
    border: 1px solid var(--neutral-700);
    color: var(--neutral-300);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    text-decoration: none;
    transition: all 0.2s;
}



.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--neutral-900);
    border: 1px solid var(--neutral-700);
    border-radius: 0.75rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--neutral-400);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.material-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.material-card {
    background-color: var(--neutral-800);
    border-radius: 0.5rem;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.material-card:hover {
    border-color: var(--neutral-600);
}

.material-icon {
    width: 32px;
    height: 32px;
    margin-right: 10px;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    object-fit: contain;
}

.material-info {
    flex: 1;
    min-width: 0;
}

.material-name-cn {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-name-en {
    color: var(--neutral-500);
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.material-amount {
    color: var(--emerald-400);
    font-family: monospace;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Confirmation Modal */
#confirmation-modal {
    z-index: 1200;
}

.btn-replace-tooltip {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    gap: 0.75rem;
}

.ad-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ad-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background-color: rgba(234, 179, 8, 0.1);
    /* Yellow tint */
    border: 1px solid rgba(234, 179, 8, 0.3);
    color: var(--yellow-400);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    text-align: center;
}

.ad-btn:hover {
    background-color: rgba(234, 179, 8, 0.2);
    border-color: var(--yellow-400);
}

.qq-group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.qq-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem;
    background-color: var(--neutral-800);
    border: 1px solid var(--neutral-700);
    color: var(--neutral-300);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    text-decoration: none;
    transition: all 0.2s;
}

.qq-btn:hover {
    background-color: var(--neutral-700);
    color: var(--white);
    border-color: var(--neutral-600);
}

.qq-btn i {
    font-size: 0.875rem;
}

/* Block Selector Modal Specifics */
#block-selector-modal {
    z-index: 1100;
    /* Higher than material modal */
}

.category-topbar {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--neutral-800);
    overflow-x: auto;
    margin: 0;
}

.category-btn {
    background: transparent;
    border: 1px solid var(--neutral-700);
    color: var(--neutral-400);
    padding: 0.5rem 1.25rem;
    border-radius: 0.5rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    flex-shrink: 0;
}

.category-btn:hover {
    border-color: var(--neutral-500);
    color: var(--neutral-200);
}

.category-btn.active {
    .modal-body {
        padding: 1.5rem;
        overflow-y: auto;
    }

    .material-list-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .material-card {
        background-color: var(--neutral-800);
        border-radius: 0.5rem;
        padding: 0.75rem;
        display: flex;
        align-items: center;
        gap: 0.75rem;
        border: 1px solid transparent;
        transition: border-color 0.2s;
    }

    .material-card:hover {
        border-color: var(--neutral-600);
    }

    .material-icon {
        width: 32px;
        height: 32px;
        margin-right: 10px;
        image-rendering: pixelated;
        image-rendering: -moz-crisp-edges;
        image-rendering: crisp-edges;
        object-fit: contain;
    }

    .material-info {
        flex: 1;
        min-width: 0;
    }

    .material-name-cn {
        color: var(--white);
        font-size: 0.875rem;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .material-name-en {
        color: var(--neutral-500);
        font-size: 0.75rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .material-amount {
        color: var(--emerald-400);
        font-family: monospace;
        font-weight: 600;
        font-size: 0.875rem;
    }

    /* Confirmation Modal */
    #confirmation-modal {
        z-index: 1200;
    }

    .btn-replace-tooltip {
        background: none;
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: rgba(255, 255, 255, 0.8);
        border-radius: 4px;
        padding: 4px 8px;
        font-size: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.2s;
        gap: 0.75rem;
    }

    .ad-container {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .ad-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0.5rem;
        background-color: rgba(234, 179, 8, 0.1);
        /* Yellow tint */
        border: 1px solid rgba(234, 179, 8, 0.3);
        color: var(--yellow-400);
        border-radius: 0.375rem;
        font-size: 0.75rem;
        font-weight: 500;
        text-decoration: none;
        transition: all 0.2s;
        text-align: center;
    }

    .ad-btn:hover {
        background-color: rgba(234, 179, 8, 0.2);
        border-color: var(--yellow-400);
    }

    .qq-group-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .qq-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.4rem;
        padding: 0.5rem;
        background-color: var(--neutral-800);
        border: 1px solid var(--neutral-700);
        color: var(--neutral-300);
        border-radius: 0.375rem;
        font-size: 0.75rem;
        text-decoration: none;
        transition: all 0.2s;
    }

    .qq-btn:hover {
        background-color: var(--neutral-700);
        color: var(--white);
        border-color: var(--neutral-600);
    }

    .qq-btn i {
        font-size: 0.875rem;
    }

    /* Block Selector Modal Specifics */
    #block-selector-modal {
        z-index: 1100;
        /* Higher than material modal */
    }

    .category-topbar {
        display: flex;
        gap: 1rem;
        padding: 1rem;
        border-bottom: 1px solid var(--neutral-800);
        overflow-x: auto;
        margin: 0;
    }

    .category-btn {
        background: transparent;
        border: 1px solid var(--neutral-700);
        color: var(--neutral-400);
        padding: 0.5rem 1.25rem;
        border-radius: 0.5rem;
        cursor: pointer;
        white-space: nowrap;
        transition: all 0.2s;
        flex-shrink: 0;
    }

    .category-btn:hover {
        border-color: var(--neutral-500);
        color: var(--neutral-200);
    }

    .category-btn.active {
        background-color: var(--emerald-600);
        border-color: var(--emerald-500);
        color: white;
    }

    #block-selector-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.5rem;
        padding: 1rem;
        overflow-y: auto;
        flex: 1;
    }

    .block-item {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.25rem 0.5rem;
        border-radius: 0.5rem;
        cursor: pointer;
        transition: background-color 0.2s;
        background-color: transparent;
    }

    .block-item:hover {
        background-color: var(--neutral-800);
    }

    .block-item-icon {
        width: 28px !important;
        height: 28px !important;
        flex-shrink: 0;
    }

    .block-item-icon img {
        width: 100%;
        height: 100%;
        image-rendering: pixelated;
        image-rendering: -moz-crisp-edges;
        image-rendering: crisp-edges;
    }

    .block-item-info {
        display: flex;
        flex-direction: column;
        overflow: hidden;
        flex: 1;
        min-width: 0;
        gap: 0.1rem;
    }

    .block-item-name-cn {
        color: var(--white);
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.2;
    }

    .block-item-name-en {
        color: var(--neutral-500);
        font-size: 0.7rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.1;
    }

    .close-btn:hover {
        color: var(--white);
    }

    .modal-body {
        padding: 1.5rem;
        overflow-y: auto;
    }

    .material-list-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }

    .material-card {
        background-color: var(--neutral-800);
        border-radius: 0.5rem;
        padding: 0.75rem;
        display: flex;
        align-items: center;
        gap: 0.75rem;
        border: 1px solid transparent;
        transition: border-color 0.2s;
    }

    .material-card:hover {
        border-color: var(--neutral-600);
    }

    .material-icon {
        width: 32px;
        height: 32px;
        margin-right: 10px;
        image-rendering: pixelated;
        image-rendering: -moz-crisp-edges;
        image-rendering: crisp-edges;
        object-fit: contain;
    }

    .material-info {
        flex: 1;
        min-width: 0;
    }

    .material-name-cn {
        color: var(--white);
        font-size: 0.875rem;
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .material-name-en {
        color: var(--neutral-500);
        font-size: 0.75rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .material-amount {
        color: var(--emerald-400);
        font-family: monospace;
        font-weight: 600;
        font-size: 0.875rem;
    }

    /* Confirmation Modal */
    #confirmation-modal {
        z-index: 1200;
    }

    .btn-replace-tooltip {
        background: none;
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: rgba(255, 255, 255, 0.8);
        border-radius: 4px;
        padding: 4px 8px;
        font-size: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.2s;
        gap: 0.75rem;
    }

    .ad-container {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .ad-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0.5rem;
        background-color: rgba(234, 179, 8, 0.1);
        /* Yellow tint */
        border: 1px solid rgba(234, 179, 8, 0.3);
        color: var(--yellow-400);
        border-radius: 0.375rem;
        font-size: 0.75rem;
        font-weight: 500;
        text-decoration: none;
        transition: all 0.2s;
        text-align: center;
    }

    .ad-btn:hover {
        background-color: rgba(234, 179, 8, 0.2);
        border-color: var(--yellow-400);
    }

    .qq-group-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .qq-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.4rem;
        padding: 0.5rem;
        background-color: var(--neutral-800);
        border: 1px solid var(--neutral-700);
        color: var(--neutral-300);
        border-radius: 0.375rem;
        font-size: 0.75rem;
        text-decoration: none;
        transition: all 0.2s;
    }

    .qq-btn:hover {
        background-color: var(--neutral-700);
        color: var(--white);
        border-color: var(--neutral-600);
    }

    .qq-btn i {
        font-size: 0.875rem;
    }

    /* Block Selector Modal Specifics */
    #block-selector-modal {
        z-index: 1100;
        /* Higher than material modal */
    }

    .category-topbar {
        display: flex;
        gap: 1rem;
        padding: 1rem;
        border-bottom: 1px solid var(--neutral-800);
        overflow-x: auto;
        margin: 0;
    }

    .category-btn {
        background: transparent;
        border: 1px solid var(--neutral-700);
        color: var(--neutral-400);
        padding: 0.5rem 1.25rem;
        border-radius: 0.5rem;
        cursor: pointer;
        white-space: nowrap;
        transition: all 0.2s;
        flex-shrink: 0;
    }

    .category-btn:hover {
        border-color: var(--neutral-500);
        color: var(--neutral-200);
    }

/* Universal focus styles for all buttons and interactive elements */
button:focus,
button:focus-visible,
.category-btn:focus,
.category-btn:focus-visible,
.slider-btn:focus,
.slider-btn:focus-visible {
    outline: none;
    box-shadow: none;
}