/* =====================
   Sprite Sheet - Styles
   游戏化样式
   ===================== */

/* ===== Zoom Control ===== */
.zoom-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    font-weight: 600;
}

.zoom-control .btn--small {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.zoom-control__label {
    font-size: 0.75rem;
    color: var(--pixel-text-secondary);
    font-weight: 600;
}


.zoom-control__value {
    font-size: 0.75rem;
    color: var(--pixel-text-primary);
    min-width: 36px;
    text-align: right;
    font-weight: 700;
}

/* ===== Preview Container Zoomable ===== */
.preview-container--zoomable {
    max-height: 420px;
    overflow: auto;
    align-items: flex-start;
}

.preview-container--zoomable canvas {
    transform-origin: top left;
    transition: transform 0.1s ease;
}

/* ===== Split Grid Zoomable ===== */
.split-grid--zoomable {
    max-height: 420px;
    overflow: auto;
}

/* ===== Split Grid Item Actions ===== */
.split-grid-item__actions {
    position: absolute;
    top: 4px;
    right: 4px;
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--pixel-transition);
    z-index: 10;
}

.split-grid-item:hover .split-grid-item__actions {
    opacity: 1;
}

.split-grid-item__action {
    width: 24px;
    height: 24px;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--pixel-transition);
}

.split-grid-item__action svg {
    width: 12px;
    height: 12px;
}

.split-grid-item__action--delete {
    background: var(--pixel-error);
    color: white;
    box-shadow: 2px 2px 0 rgba(45, 31, 61, 0.2);
}

.split-grid-item__action--delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.split-grid-item__action--move {
    background: var(--pixel-primary);
    color: white;
    cursor: grab;
    box-shadow: 2px 2px 0 rgba(45, 31, 61, 0.2);
}

.split-grid-item__action--move:hover {
    background: var(--pixel-primary-dark);
}

.split-grid-item__action--move:active {
    cursor: grabbing;
}

/* ===== Split Grid Item Download Button ===== */
.split-grid-item__download {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pixel-success, #22c55e);
    color: white;
    box-shadow: 2px 2px 0 rgba(45, 31, 61, 0.2);
    opacity: 0;
    transition: all var(--pixel-transition);
    z-index: 10;
}

.split-grid-item__download svg {
    width: 12px;
    height: 12px;
}

.split-grid-item:hover .split-grid-item__download {
    opacity: 1;
}

.split-grid-item__download:hover {
    background: #16a34a;
    transform: scale(1.1);
}

/* ===== Drag Handle Active State ===== */
.split-grid-item.dragging {
    opacity: 0.5;
    border-color: var(--pixel-primary);
    box-shadow: var(--pixel-shadow-lg);
}

.split-grid-item.drag-over {
    border-color: #D4714A;
    background: rgba(212, 113, 74, 0.1);
}

.split-grid-item__action--move.dragging {
    background: var(--pixel-primary-dark);
}

/* ===== Control Card ===== */
.control-card {
    background: var(--pixel-card-bg);
    border-radius: var(--pixel-card-radius);
    border: 4px solid transparent;
    box-shadow: var(--pixel-card-shadow);
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    flex: 1;
    min-height: 0;
    width: 100%;
    align-self: stretch;
}

/* 缝线边框效果 */
.control-card::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 3px dashed var(--pixel-border-dashed);
    border-radius: calc(var(--pixel-card-radius, 16px) - 8px);
    pointer-events: none;
    z-index: 5;
}

/* ===== Mode Navigation ===== */
.mode-nav {
    display: flex;
    margin: var(--pixel-card-border-offset);
    margin-bottom: 0;
    border-radius: calc(var(--pixel-card-radius) - var(--pixel-card-border-offset)) calc(var(--pixel-card-radius) - var(--pixel-card-border-offset)) 0 0;
    overflow: hidden;
}

.mode-nav__btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all var(--pixel-transition);
    color: var(--pixel-text-secondary);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 700;
    position: relative;
    margin-bottom: -3px;
}

.mode-nav__btn:hover {
    color: var(--pixel-primary);
    background: rgba(154, 104, 101, 0.1);
}

.mode-nav__btn svg {
    width: 18px;
    height: 18px;
}

.mode-nav__btn--active {
    color: var(--pixel-primary);
    background: #F8EAD7;
}

/* ===== Card Section ===== */
.card-section {
    padding: 1.25rem 1.5rem;
}

.card-section:last-child {
    border-bottom: none;
}

.card-section__title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--pixel-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 1rem;
}

/* ===== Upload Zone in Card ===== */
.card-section .upload-zone {
    border-color: var(--pixel-border);
    background: #FFFDF5;
}

.card-section .upload-zone:hover {
    border-color: var(--pixel-primary);
    background: rgba(255, 107, 53, 0.02);
}

/* ===== Control Group in Card ===== */
.card-section .control-group__input {
    background: #FFFDF5;
    border-color: var(--pixel-border);
}

.card-section .control-group__input:focus {
    border-color: var(--pixel-primary);
}

/* ===== Radio Group in Card ===== */
.card-section .radio-label input[type="radio"] {
    accent-color: var(--pixel-primary);
}

/* ===== Mode Panel ===== */
.mode-panel {
    animation: fadeIn 0.3s ease;
}

/* ===== Button Group in Card ===== */
.card-section .btn-group {
    margin-top: 1rem;
}

/* ===== Upload Zone Multi ===== */
.upload-zone--multi {
    min-height: 120px;
}

/* ===== Image Count ===== */
.image-count {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: #FFFDF5;
    border-radius: var(--pixel-radius-md);
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--pixel-text-primary);
    font-weight: 600;
    border: 3px solid var(--pixel-border);
}

.image-count strong {
    color: var(--pixel-primary);
}

.btn-clear {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--pixel-error);
    background: transparent;
    border: 2px solid var(--pixel-error);
    border-radius: var(--pixel-radius-md);
    cursor: pointer;
    transition: all var(--pixel-transition);
}

.btn-clear:hover {
    background: var(--pixel-error);
    color: white;
}

/* ===== Size Inputs ===== */
.size-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.size-inputs .control-group__input {
    flex: 1;
    text-align: center;
}

.size-separator {
    color: var(--pixel-text-secondary);
    font-weight: 700;
}

/* ===== Output Size Info ===== */
.output-size-info {
    font-size: 0.8rem;
    color: var(--pixel-text-secondary);
    padding: 0.75rem 0;
    font-weight: 600;
}

.output-size-info strong {
    color: var(--pixel-primary);
}

/* ===== Preview Mode Area ===== */
.preview-mode-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ===== Preview Row ===== */
.preview-row {
    display: flex;
    gap: 1.5rem;
}

.preview-section--half {
    flex: 1;
    min-width: 0;
}

.preview-section--half .preview-container {
    min-height: 250px;
}

/* ===== Image List ===== */
.image-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 0.75rem;
    min-height: 200px;
    padding: 1rem;
    background: var(--pixel-bg-main);
    border-radius: var(--pixel-radius-md);
    border: 3px dashed var(--pixel-border-dashed);
}

.image-list-placeholder {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--pixel-text-secondary);
}

.image-list-placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.image-list-item {
    position: relative;
    aspect-ratio: 1;
    background: #FFFDF5;
    border-radius: var(--pixel-radius-md);
    overflow: hidden;
    cursor: grab;
    border: 3px solid transparent;
    transition: all var(--pixel-transition);
    box-shadow: var(--pixel-shadow-sm);
}

.image-list-item:hover {
    border-color: var(--pixel-primary);
    transform: translateY(-4px) rotate(-2deg);
    box-shadow: var(--pixel-shadow-lg);
}

.image-list-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.image-list-item__remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    background: var(--pixel-error);
    color: white;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--pixel-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    box-shadow: 2px 2px 0 rgba(45, 31, 61, 0.2);
}

.image-list-item:hover .image-list-item__remove {
    opacity: 1;
}

.image-list-item__index {
    position: absolute;
    bottom: 4px;
    left: 4px;
    min-width: 20px;
    height: 20px;
    background: rgba(45, 31, 61, 0.85);
    color: white;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--pixel-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* ===== Split Grid ===== */
.split-grid {
    display: grid;
    gap: 0.5rem;
    min-height: 300px;
    padding: 1rem;
    background: var(--pixel-bg-main);
    border-radius: var(--pixel-radius-md);
    border: 3px dashed var(--pixel-border-dashed);
}

.split-grid-item {
    aspect-ratio: 1;
    background: #FFFDF5;
    border-radius: var(--pixel-radius-md);
    overflow: hidden;
    cursor: grab;
    border: 3px solid transparent;
    transition: all var(--pixel-transition);
    position: relative;
    box-shadow: var(--pixel-shadow-sm);
}

.split-grid-item:hover {
    border-color: var(--pixel-primary);
    transform: translateY(-2px);
    box-shadow: var(--pixel-shadow-md);
}

.split-grid-item--selected {
    border-color: var(--pixel-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

.split-grid-item img,
.split-grid-item canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.split-grid-item__index {
    position: absolute;
    top: 4px;
    left: 4px;
    min-width: 22px;
    height: 22px;
    background: var(--pixel-primary);
    color: white;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--pixel-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    box-shadow: 2px 2px 0 rgba(45, 31, 61, 0.2);
}

/* ===== Split Grid Placeholder ===== */
.split-grid-item--placeholder {
    background: var(--pixel-bg-main);
    border: 3px dashed var(--pixel-border-dashed);
    cursor: default;
    box-shadow: none;
}

.split-grid-item--placeholder:hover {
    border-color: var(--pixel-border);
    transform: none;
}

.split-grid-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pixel-text-muted);
    opacity: 0.3;
}

.split-grid-placeholder svg {
    width: 50%;
    height: 50%;
}

.split-grid-item--placeholder .split-grid-item__index {
    background: var(--pixel-primary);
    opacity: 0.5;
}

/* ===== Hint Text ===== */
.hint-text {
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--pixel-text-secondary);
    margin-left: auto;
}

/* ===== Piece Size Info ===== */
.piece-size-info {
    font-size: 0.8rem;
    color: var(--pixel-text-secondary);
    padding: 0.75rem 0;
    font-weight: 600;
}

/* ===== Preview Wrapper ===== */
.preview-wrapper {
    position: relative;
    cursor: grab;
    transform-origin: center center;
}

.preview-wrapper:active {
    cursor: grabbing;
}

/* ===== Grid Overlay ===== */
.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.grid-line-h,
.grid-line-v {
    position: absolute;
    background: var(--pixel-border-dashed);
}

.grid-line-h {
    width: 100%;
    height: 2px;
}

.grid-line-v {
    width: 2px;
    height: 100%;
}

/* ===== Full Width Button ===== */
.btn--full {
    width: 100%;
}

/* ===== Dragging States ===== */
.image-list-item.dragging,
.split-grid-item.dragging {
    opacity: 0.5;
    border-color: var(--pixel-primary);
}

.image-list-item.drag-over,
.split-grid-item.drag-over {
    border-color: #D4714A;
    background: rgba(212, 113, 74, 0.1);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .mode-nav {
        flex-direction: row;
    }

    .preview-row {
        flex-direction: column;
    }

    .image-list {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }

    .split-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}