/* Student Portal 1.5 — bounded carousel, image editor and scrollable exercise catalog */
.sp-exercise-modal {
    align-items: flex-start !important;
    overflow-y: auto !important;
    overscroll-behavior: contain;
    padding: max(18px, 4vh) 16px !important;
}

.sp-exercise-modal-dialog {
    width: min(1120px, calc(100vw - 32px)) !important;
    max-height: calc(100dvh - 36px) !important;
    margin: 0 auto !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
}

.sp-exercise-modal-close,
.sp-image-viewer-close,
.sp-image-tools button,
.sp-image-zoom button,
.sp-viewer-arrow,
.sp-image-carousel [data-prev],
.sp-image-carousel [data-next] {
    display: grid !important;
    place-items: center !important;
    padding: 0 !important;
    text-align: center !important;
    line-height: 1 !important;
}

.sp-image-carousel figure img {
    width: 100% !important;
    height: auto !important;
    max-height: 680px !important;
    object-fit: contain !important;
    background: #f8fafc !important;
}

.sp-image-carousel > div {
    min-height: 44px;
}

.sp-image-carousel > div button[hidden] {
    display: none !important;
}

.sp-image-carousel > div button {
    width: 38px;
    height: 38px;
    border-radius: 50% !important;
    background: #eff6ff !important;
    color: #1d4ed8 !important;
}

.sp-image-viewer-v4 {
    overflow: auto;
    padding: 26px !important;
}

.sp-image-viewer-v4 .sp-image-viewer-shell {
    position: relative;
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) 52px;
    align-items: center;
    width: min(1500px, 96vw);
    min-height: min(92vh, 980px);
    padding: 24px 24px 18px;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 30px 90px rgba(15, 23, 42, .38);
}

.sp-image-viewer-v4 .sp-image-viewer-stage {
    grid-column: 2;
    width: 100%;
    height: min(72vh, 780px);
    overflow: auto;
    border-radius: 16px;
    background: #f1f5f9;
}

.sp-image-scroll {
    position: relative;
    display: grid;
    min-width: 100%;
    min-height: 100%;
    place-items: center;
}

.sp-image-scroll > img {
    display: block;
    width: auto;
    height: auto;
    max-width: calc(100% * var(--sp-image-scale, 1));
    max-height: none;
    transform: scale(var(--sp-image-scale, 1));
    transform-origin: center;
}

.sp-image-scroll > canvas {
    position: absolute;
    touch-action: none;
    cursor: crosshair;
    transform: scale(var(--sp-image-scale, 1));
    transform-origin: center;
}

.sp-image-viewer-close {
    position: absolute;
    z-index: 5;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: #eef2f7;
    color: #334155;
    font: 500 28px/1 Arial, sans-serif;
    cursor: pointer;
}

.sp-image-viewer-v4 .sp-viewer-arrow {
    position: static !important;
    width: 44px;
    height: 44px;
    margin: auto;
    border: 0;
    border-radius: 50%;
    background: #eff6ff;
    color: #1d4ed8;
    font: 600 32px/1 Arial, sans-serif;
}

.sp-image-viewer-v4 .sp-viewer-arrow[hidden] {
    display: none !important;
}

.sp-image-viewer-v4 .is-prev { grid-column: 1; grid-row: 1; }
.sp-image-viewer-v4 .is-next { grid-column: 3; grid-row: 1; }
.sp-viewer-caption,
.sp-viewer-count { grid-column: 2; text-align: center; }
.sp-viewer-caption { margin-top: 12px; color: #475569; font-size: 15px; }
.sp-viewer-count { margin-top: 7px; color: #1e293b; font-weight: 750; }

.sp-image-viewer-v4 .sp-image-controlbar {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid #e2e8f0;
}

.sp-image-tools,
.sp-image-zoom,
.sp-tool-settings {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.sp-image-tools button,
.sp-image-zoom button {
    width: 40px;
    height: 40px;
    border: 1px solid #dbe3ed;
    border-radius: 11px;
    background: #fff;
    color: #334155;
}

.sp-image-tools button.is-active {
    border-color: #60a5fa;
    background: #eff6ff;
    color: #1d4ed8;
}

.sp-tool-settings {
    padding: 5px 9px;
    border-radius: 12px;
    background: #f8fafc;
}

.sp-tool-settings label { display: flex; align-items: center; }
.sp-tool-settings input[type="color"] { width: 34px; height: 34px; padding: 2px; }
.sp-tool-settings input[type="range"] { width: 110px; }

@media (max-width: 700px) {
    .sp-image-viewer-v4 { padding: 7px !important; }
    .sp-image-viewer-v4 .sp-image-viewer-shell { grid-template-columns: 42px minmax(0,1fr) 42px; width: 100%; padding: 56px 6px 12px; }
    .sp-image-viewer-v4 .sp-image-viewer-stage { height: 66vh; }
    .sp-image-viewer-v4 .sp-image-controlbar { align-items: stretch; flex-direction: column; }
    .sp-image-tools { justify-content: center; }
    .sp-image-zoom { justify-content: center; }
}