/* Image Splitter — isp- */
.isp-upload-zone {
    border: 2px dashed rgba(139, 92, 246, 0.35);
    border-radius: 16px;
    background: rgba(139, 92, 246, 0.04);
    padding: 56px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    outline: none;
}

.isp-upload-zone:hover,
.isp-upload-zone:focus,
.isp-upload-zone.isp-drag-over {
    border-color: #8B5CF6;
    background: rgba(139, 92, 246, 0.08);
}

.isp-upload-icon {
    font-size: 3rem;
    color: #8B5CF6;
    opacity: 0.7;
    margin-bottom: 14px;
    display: block;
}

.isp-upload-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px;
}

.isp-upload-sub {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
}

.isp-section {
    padding: 40px 0 60px;

}

.isp-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem
}

.isp-badge {
    width: 44px;
    height: 44px;
    background: rgba(139, 92, 246, .15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #8B5CF6;
    flex-shrink: 0
}

.isp-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0F172A;
    margin: 0 0 .2rem
}

.isp-subtitle {
    font-size: 0.9375rem;
    color: #64748B;
    margin: 0
}

.isp-controls {
    background: #F8FAFC;
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    border: 1px solid #E2E8F0;
    display: flex;
    flex-direction: column;
    gap: .75rem
}

.isp-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .75rem
}

.isp-group {
    display: flex;
    flex-direction: column;
    gap: .4rem
}

.isp-label {
    font-size: 0.9375rem;
    color: #64748B;
    display: flex;
    align-items: center;
    gap: .5rem
}

.isp-input {
    background: #F1F5F9;
    border: 1px solid #E2E8F0;
    border-radius: 6px;
    padding: .45rem .7rem;
    color: #0F172A;
    font-size: 0.9375rem;
    outline: none;
    width: 100%;
    box-sizing: border-box;
}

.isp-input:focus {
    border-color: #8B5CF6;
}

.isp-val-badge {
    background: #F1F5F9;
    border-radius: 4px;
    padding: .1rem .4rem;
    font-size: 0.8125rem;
    color: #8B5CF6;
    font-variant-numeric: tabular-nums;
    min-width: 2ch;
    text-align: center
}

.isp-slider {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: linear-gradient(to right, #8B5CF6 var(--val, 7%), #E2E8F0 var(--val, 7%));
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    width: 100%
}

.isp-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #8B5CF6;
    cursor: pointer
}

.isp-format-tabs {
    display: flex;
    gap: .4rem
}

.isp-format-tab {
    padding: .35rem .9rem;
    border-radius: 5px;
    border: 1px solid #E2E8F0;
    background: none;
    color: #64748B;
    cursor: pointer;
    font-size: 0.9375rem;
    transition: all .2s
}

.isp-format-tab.active {
    background: #8B5CF6;
    color: #fff;
    border-color: #8B5CF6
}

.isp-actions {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem
}

.isp-btn {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .55rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity .2s, transform .1s
}

.isp-btn:active {
    transform: scale(.97)
}

.isp-btn--primary {
    background: #8B5CF6;
    color: #fff
}

.isp-btn--ghost {
    background: #F1F5F9;
    color: var(--text-secondary, #64748b);
    border: 1px solid rgba(100, 116, 139, 0.2);
}

.isp-btn--ghost:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
}

.isp-results-label {
    font-size: 0.9375rem;
    color: #64748B;
    margin-bottom: .75rem
}

/* ── Quick presets ─────────────────────────────────────────────── */
.isp-presets {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .4rem;
    margin-bottom: 1rem;
}

.isp-presets-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #94A3B8;
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-right: .25rem;
}

.isp-preset-btn {
    padding: .3rem .75rem;
    border-radius: 6px;
    border: 1px solid #E2E8F0;
    background: #F8FAFC;
    color: #64748B;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all .15s;
}

.isp-preset-btn:hover,
.isp-preset-btn.isp-preset-btn--active {
    background: #8B5CF6;
    border-color: #8B5CF6;
    color: #fff;
}

/* ── Side-by-side layout ───────────────────────────────────────────── */
.isp-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.5rem;
    align-items: start;
    margin-bottom: 1.25rem;
}

.isp-col-controls {
    min-width: 0;
}

.isp-col-preview {
    position: sticky;
    top: 90px;
}

.isp-preview-box {
    background: #F8FAFC;
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid #E2E8F0;
    text-align: center;
}

.isp-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: .6rem;
}

.isp-pane-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: #64748B;
}

.isp-preview-hint {
    font-size: 0.75rem;
    color: #8B5CF6;
    opacity: .8;
    display: flex;
    align-items: center;
    gap: 3px;
}

#isp-preview-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    display: block;
    margin: 0 auto;
}

/* ── Tile count ───────────────────────────────────────────────────── */
.isp-tile-count {
    font-size: 0.875rem;
    color: #64748B;
    margin: .25rem 0 0;
    background: rgba(139, 92, 246, .06);
    border-radius: 6px;
    padding: .35rem .7rem;
}

.isp-tile-count strong {
    color: #8B5CF6;
}

.isp-grid {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem
}

.isp-tile {
    cursor: pointer;
    border: 1px solid #E2E8F0;
    border-radius: 6px;
    overflow: hidden;
    transition: border-color .2s
}

.isp-tile:hover {
    border-color: #8B5CF6
}

.isp-tile canvas {
    display: block;
    max-width: 160px;
    max-height: 160px;
    width: auto;
    height: auto
}

@media(max-width:860px) {
    .isp-layout {
        grid-template-columns: 1fr;
    }

    .isp-col-preview {
        position: static;
        order: -1;
    }
}

@media(max-width:600px) {
    .isp-row {
        grid-template-columns: 1fr
    }
}