/* Unified dock modal shell (Canvas, Homework, Rewards, My Edu, Tools, …) */
#lms-hw-root {
    --lms-dock-shell-width: min(1100px, calc(100vw - 1.25rem));
    --lms-dock-shell-height: min(94vh, 920px);
    --lms-dock-shell-max-height: min(94vh, 920px);
}

.lms-hw__dock {
    position: fixed;
    right: 0.7rem;
    bottom: 0.7rem;
    z-index: 80;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.55rem;
    pointer-events: none;
}

.lms-hw__dock-panel {
    pointer-events: none;
    transform-origin: bottom right;
    transform: scale(0.82) translateY(18px);
    opacity: 0;
    visibility: hidden;
    transition: transform .32s cubic-bezier(.34, 1.56, .64, 1), opacity .2s ease, visibility .32s;
}

.lms-hw__dock.is-open .lms-hw__dock-panel {
    pointer-events: auto;
    transform: scale(1) translateY(0);
    opacity: 1;
    visibility: visible;
}

.lms-hw__dock-shell {
    pointer-events: auto;
    display: flex;
    flex-direction: column-reverse;
    align-items: stretch;
    gap: 0.15rem;
    padding: 0.4rem;
    min-width: 11.5rem;
    border-radius: 1.15rem;
    background:
        linear-gradient(180deg, rgb(255 255 255 / 0.94) 0%, rgb(238 238 240 / 0.9) 100%);
    border: 1px solid rgb(255 255 255 / 0.8);
    box-shadow:
        0 1px 0 rgb(255 255 255 / 0.98) inset,
        0 -2px 4px rgb(15 23 42 / 0.08) inset,
        0 2px 3px rgb(15 23 42 / 0.06) inset,
        0 12px 28px rgb(15 23 42 / 0.18),
        0 3px 8px rgb(15 23 42 / 0.1);
    backdrop-filter: blur(16px) saturate(1.35);
    -webkit-backdrop-filter: blur(16px) saturate(1.35);
}

.lms-hw__dock-divider {
    width: 100%;
    height: 1px;
    margin: 0.1rem 0;
    background: linear-gradient(90deg, transparent, rgb(15 23 42 / 0.18), transparent);
}

.lms-hw__dock-btn {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    gap: 0.5rem;
    min-height: 2.35rem;
    padding: 0.28rem 0.65rem 0.28rem 0.3rem;
    border: 0;
    border-radius: 0.9rem;
    background: transparent;
    color: #1f2937;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform .16s ease, box-shadow .16s ease, background .16s ease, color .16s ease;
}

.lms-hw__dock-toggle {
    position: relative;
    pointer-events: auto;
    width: 3.4rem;
    height: 3.4rem;
    flex: none;
    border: 0;
    padding: 0;
    border-radius: 999px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(
            180deg,
            color-mix(in srgb, var(--brand-primary, #8b5cf6) 78%, #fff) 0%,
            var(--brand-primary, #8b5cf6) 55%,
            color-mix(in srgb, var(--brand-primary, #8b5cf6) 78%, #4c1d95) 100%
        );
    box-shadow:
        0 1px 0 rgb(255 255 255 / 0.4) inset,
        0 -1px 2px rgb(0 0 0 / 0.18) inset,
        0 8px 20px color-mix(in srgb, var(--brand-primary, #8b5cf6) 48%, transparent),
        0 0 0 1px color-mix(in srgb, var(--brand-primary, #8b5cf6) 55%, #4c1d95);
    transition: transform .22s cubic-bezier(.34, 1.56, .64, 1), box-shadow .22s ease;
    animation: lms-dock-toggle-breathe 3.2s ease-in-out infinite;
}

.lms-hw__dock-toggle:hover {
    transform: scale(1.06);
}

.lms-hw__dock-toggle:active {
    transform: scale(0.94);
}

.lms-hw__dock.is-open .lms-hw__dock-toggle {
    animation: none;
    transform: scale(1.04);
}

.lms-hw__dock-toggle-ring {
    position: absolute;
    inset: -5px;
    border-radius: 999px;
    border: 2px solid color-mix(in srgb, var(--brand-primary, #8b5cf6) 55%, transparent);
    opacity: .55;
    pointer-events: none;
    animation: lms-dock-toggle-ring 2.6s ease-out infinite;
}

.lms-hw__dock.is-open .lms-hw__dock-toggle-ring {
    animation: none;
    opacity: 0;
}

.lms-hw__dock-toggle-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 999px;
    overflow: hidden;
    border: 2px solid rgb(255 255 255 / .85);
    box-shadow: 0 1px 4px rgb(15 23 42 / .25);
    background: #fff;
}

.lms-hw__dock-toggle-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.lms-hw__dock-toggle-glyph {
    position: absolute;
    right: -0.15rem;
    bottom: -0.15rem;
    width: 1.35rem;
    height: 1.35rem;
    border-radius: 999px;
    background: #fff;
    color: var(--brand-primary, #8b5cf6);
    box-shadow: 0 2px 6px rgb(15 23 42 / .25), 0 0 0 1px rgb(255 255 255 / .9);
}

.lms-hw__dock-toggle-glyph svg {
    position: absolute;
    inset: 0;
    margin: auto;
    transition: transform .28s cubic-bezier(.34, 1.56, .64, 1), opacity .2s ease;
}

.lms-hw__dock-toggle-glyph-grid {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.lms-hw__dock-toggle-glyph-close {
    opacity: 0;
    transform: rotate(-90deg) scale(.6);
}

.lms-hw__dock.is-open .lms-hw__dock-toggle-glyph-grid {
    opacity: 0;
    transform: rotate(90deg) scale(.6);
}

.lms-hw__dock.is-open .lms-hw__dock-toggle-glyph-close {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

@keyframes lms-dock-toggle-breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.045); }
}

@keyframes lms-dock-toggle-ring {
    0% { transform: scale(0.9); opacity: .55; }
    70% { transform: scale(1.35); opacity: 0; }
    100% { transform: scale(1.35); opacity: 0; }
}

.lms-hw__dock-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.85rem;
    height: 1.85rem;
    border-radius: 0.7rem;
    background:
        linear-gradient(180deg, #ffffff 0%, #e8eaee 100%);
    color: #374151;
    box-shadow:
        0 1px 0 #fff inset,
        0 -1px 2px rgb(15 23 42 / 0.1) inset,
        0 2px 5px rgb(15 23 42 / 0.14),
        0 0 0 1px rgb(15 23 42 / 0.07);
}

.lms-hw__dock-icon svg {
    width: 14px;
    height: 14px;
}

.lms-hw__dock-btn.is-primary .lms-hw__dock-icon {
    color: var(--brand-button-text, #fff);
    background:
        linear-gradient(
            180deg,
            color-mix(in srgb, var(--brand-primary, #8b5cf6) 78%, #fff) 0%,
            var(--brand-primary, #8b5cf6) 55%,
            color-mix(in srgb, var(--brand-primary, #8b5cf6) 78%, #4c1d95) 100%
        );
    box-shadow:
        0 1px 0 rgb(255 255 255 / 0.4) inset,
        0 -1px 2px rgb(0 0 0 / 0.18) inset,
        0 3px 8px color-mix(in srgb, var(--brand-primary, #8b5cf6) 48%, transparent),
        0 0 0 1px color-mix(in srgb, var(--brand-primary, #8b5cf6) 55%, #4c1d95);
}

.lms-hw__dock-btn:hover {
    background: rgb(255 255 255 / 0.55);
    transform: translateY(-1px);
}

.lms-hw__dock-btn:active {
    transform: translateY(1px);
}

.lms-hw__dock-btn:active .lms-hw__dock-icon {
    box-shadow:
        0 3px 5px rgb(15 23 42 / 0.2) inset,
        0 1px 0 rgb(255 255 255 / 0.35),
        0 0 0 1px rgb(15 23 42 / 0.1);
}

.lms-hw__dock-btn.is-primary:active .lms-hw__dock-icon {
    box-shadow:
        0 3px 6px rgb(0 0 0 / 0.28) inset,
        0 1px 0 rgb(255 255 255 / 0.2),
        0 0 0 1px color-mix(in srgb, var(--brand-primary, #8b5cf6) 55%, #4c1d95);
}

.lms-hw__dock-label {
    padding-right: 0.12rem;
}

.lms-hw__modal[hidden] {
    display: none !important;
}

.lms-hw__modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 1rem;
}

.lms-hw__backdrop {
    position: absolute;
    inset: 0;
    background: rgb(15 23 42 / 0.55);
}

.lms-hw__dialog {
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    width: var(--lms-dock-shell-width, min(1100px, calc(100vw - 1.25rem)));
    height: var(--lms-dock-shell-height, min(94vh, 920px));
    max-height: var(--lms-dock-shell-max-height, min(94vh, 920px));
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 1.05rem 1.05rem;
    border-radius: 1.1rem;
    background: #fff;
    box-shadow: 0 24px 60px rgb(0 0 0 / 0.28);
    overflow: hidden;
}

.lms-hw__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-shrink: 0;
}

.lms-hw__kicker {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--brand-primary, #8b5cf6);
}

.lms-hw__header h2 {
    margin: 0.15rem 0 0;
    font-size: 1.25rem;
    font-weight: 800;
    color: #111827;
}

.lms-hw__icon-btn {
    width: 2.25rem;
    height: 2.25rem;
    border: 0;
    border-radius: 999px;
    background: #f3f4f6;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
}

.lms-hw__toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    flex-shrink: 0;
}

.lms-hw__toolbar--pops {
    position: relative;
    z-index: 5;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    padding: 0.35rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 6%, #fff);
    border: 1px solid color-mix(in srgb, var(--brand-border, #e5e7eb) 85%, #fff);
}

.lms-hw__pop {
    position: relative;
}

.lms-hw__pop-btn {
    appearance: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 2.15rem;
    padding: 0 0.85rem;
    border-radius: 999px;
    border: 1px solid #e5e7eb;
    background: #fff;
    color: #111827;
    font-size: 0.84rem;
    font-weight: 750;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease, color .15s ease;
}
.lms-hw__pop-btn i {
    font-style: normal;
    font-size: 0.7rem;
    opacity: .65;
    transition: transform .15s ease;
}
.lms-hw__pop.is-open .lms-hw__pop-btn i { transform: rotate(180deg); }
.lms-hw__pop-btn.is-active,
.lms-hw__pop.is-open .lms-hw__pop-btn {
    border-color: color-mix(in srgb, var(--brand-primary, #8b5cf6) 35%, #fff);
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 12%, #fff);
    color: var(--brand-primary, #8b5cf6);
}
.lms-hw__pop-btn--guide {
    color: var(--brand-primary, #8b5cf6);
}
.lms-hw__pop--guide { margin-left: auto; }

.lms-hw__pop-panel {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    z-index: 20;
    min-width: min(18rem, calc(100vw - 2.5rem));
    padding: 0.75rem;
    border-radius: 1rem;
    background: #fff;
    border: 1px solid color-mix(in srgb, var(--brand-border, #e5e7eb) 85%, #fff);
    box-shadow: 0 16px 40px color-mix(in srgb, #111 16%, transparent);
    animation: lms-hw-pop-in .18s ease;
}
.lms-hw__pop--guide .lms-hw__pop-panel {
    left: auto;
    right: 0;
}
@keyframes lms-hw-pop-in {
    from { opacity: 0; transform: translateY(-4px) scale(.98); }
    to { opacity: 1; transform: none; }
}

.lms-hw__pop-title {
    margin: 0 0 0.4rem;
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #6b7280;
}
.lms-hw__pop-title + .lms-hw__pop-grid,
.lms-hw__pop-title + .lms-hw__pop-row { margin-bottom: 0.7rem; }
.lms-hw__pop-note {
    margin: 0 0 0.55rem;
    font-size: 0.78rem;
    color: #6b7280;
    line-height: 1.35;
}

.lms-hw__pop-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.35rem;
}
.lms-hw__pop-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 0.7rem;
}

.lms-hw__chip {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2rem;
    padding: 0 0.55rem;
    border-radius: 0.7rem;
    border: 1px solid #e5e7eb;
    background: #fff;
    font-size: 0.78rem;
    font-weight: 750;
    color: #374151;
    cursor: pointer;
    white-space: nowrap;
}
.lms-hw__chip:hover {
    border-color: color-mix(in srgb, var(--brand-primary, #8b5cf6) 30%, #fff);
}
.lms-hw__chip.is-active {
    border-color: color-mix(in srgb, var(--brand-primary, #8b5cf6) 35%, #fff);
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 14%, #fff);
    color: var(--brand-primary, #8b5cf6);
}
.lms-hw__chip--file { cursor: pointer; }
.lms-hw__chip--guide {
    border-color: color-mix(in srgb, var(--brand-primary, #8b5cf6) 28%, #fff);
    color: var(--brand-primary, #8b5cf6);
}

.lms-hw__compact {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 2rem;
    font-size: 0.72rem;
    font-weight: 800;
    color: #6b7280;
}
.lms-hw__compact--wide { width: 100%; }
.lms-hw__compact--wide input[type="range"] { flex: 1; }
.lms-hw__compact input[type="range"] {
    width: 6rem;
    accent-color: var(--brand-primary, #8b5cf6);
}
.lms-hw__compact em {
    font-style: normal;
    font-size: 0.75rem;
    font-weight: 750;
    color: #374151;
    min-width: 1.6rem;
}
.lms-hw__compact--color input[type="color"] {
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
}

.lms-hw__size-row {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.lms-hw__size-dot {
    appearance: none;
    width: 0.85rem;
    height: 0.85rem;
    border-radius: 999px;
    border: 1px solid #d1d5db;
    background: #fff;
    cursor: pointer;
    padding: 0;
}
.lms-hw__size-dot:nth-child(1) { width: .45rem; height: .45rem; }
.lms-hw__size-dot:nth-child(2) { width: .55rem; height: .55rem; }
.lms-hw__size-dot:nth-child(3) { width: .7rem; height: .7rem; }
.lms-hw__size-dot:nth-child(4) { width: .9rem; height: .9rem; }
.lms-hw__size-dot:nth-child(5) { width: 1.1rem; height: 1.1rem; }
.lms-hw__size-dot:nth-child(6) { width: 1.3rem; height: 1.3rem; }
.lms-hw__size-dot.is-active {
    border-color: var(--brand-primary, #8b5cf6);
    background: var(--brand-primary, #8b5cf6);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-primary, #8b5cf6) 18%, transparent);
}

.lms-hw__swatches {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.28rem;
    align-items: center;
}
.lms-hw__swatches button {
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, #111 18%, transparent);
    background: var(--c, #111);
    cursor: pointer;
    padding: 0;
}

    padding: 0.75rem 0.95rem;
    border-radius: 0.95rem;
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 8%, #fff);
    border: 1px solid color-mix(in srgb, var(--brand-primary, #8b5cf6) 18%, #fff);
}
.lms-hw__ai-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.35rem 0.75rem;
    margin-bottom: 0.35rem;
}
.lms-hw__ai-kicker {
    margin: 0;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--brand-primary, #8b5cf6);
}
.lms-hw__ai-note {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 650;
    color: #6b7280;
}
.lms-hw__ai-text {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.45;
    color: #111827;
}
.lms-hw__ai-apply {
    appearance: none;
    margin-top: 0.55rem;
    min-height: 2rem;
    padding: 0 0.8rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--brand-primary, #8b5cf6) 35%, #fff);
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 10%, #fff);
    color: var(--brand-primary, #8b5cf6);
    font-size: 0.78rem;
    font-weight: 800;
    cursor: pointer;
}

.lms-hw__tool-btn,
.lms-hw__color,
.lms-hw__size {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 2.2rem;
    padding: 0.4rem 0.75rem;
    border-radius: 0.7rem;
    border: 1px solid #e5e7eb;
    background: #fff;
    font-size: 0.85rem;
    font-weight: 750;
    cursor: pointer;
    color: #111827;
}
.lms-hw__tool-btn.is-active {
    border-color: var(--brand-primary, #8b5cf6);
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 14%, #fff);
    color: var(--brand-primary, #8b5cf6);
}
.lms-hw__color input,
.lms-hw__size input {
    cursor: pointer;
}

@media (max-width: 640px) {
    .lms-hw__toolbar--pops {
        border-radius: 1rem;
    }
    .lms-hw__pop--guide { margin-left: 0; }
    .lms-hw__pop-panel {
        position: fixed;
        left: 0.75rem !important;
        right: 0.75rem !important;
        top: auto;
        bottom: 5.5rem;
        min-width: 0;
        width: auto;
    }
    .lms-hw__pop-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.lms-hw__stage-wrap {
    flex: 1;
    min-height: 280px;
    overflow: hidden;
    border-radius: 0.9rem;
    border: 1px solid #e5e7eb;
    background: #ffffff;
    display: flex;
    flex-direction: column;
}

.lms-hw__stage {
    position: relative;
    width: 100%;
    flex: 1 1 auto;
    min-height: 0;
    height: 100%;
    line-height: 0;
    background: #ffffff;
}

.lms-hw__object-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.lms-hw__object-layer.is-interactive {
    pointer-events: auto;
}

.lms-hw__obj {
    position: absolute;
    box-sizing: border-box;
    pointer-events: auto;
    touch-action: none;
    min-width: 2rem;
    min-height: 1.5rem;
}

.lms-hw__obj.is-selected {
    outline: 2px solid var(--brand-primary, #8b5cf6);
    outline-offset: 1px;
    z-index: 2;
}

.lms-hw__obj-move {
    position: absolute;
    left: 0;
    right: 0;
    top: -1.35rem;
    height: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--brand-button-text, #fff);
    background: var(--brand-primary, #8b5cf6);
    border-radius: 0.45rem 0.45rem 0 0;
    cursor: grab;
    user-select: none;
    touch-action: none;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--brand-primary, #8b5cf6) 35%, transparent);
}

.lms-hw__obj-move:active {
    cursor: grabbing;
}

.lms-hw__obj-text {
    width: 100%;
    min-height: 1.4em;
    padding: 0.15rem 0.25rem;
    outline: none;
    cursor: default;
    word-break: break-word;
    white-space: pre-wrap;
    line-height: 1.35;
    user-select: none;
}

.lms-hw__obj-text[contenteditable="true"] {
    cursor: text;
    user-select: text;
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand-primary, #8b5cf6) 45%, #fff);
}

.lms-hw__obj-shape {
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
}

.lms-hw__obj-handle {
    position: absolute;
    width: 0.7rem;
    height: 0.7rem;
    padding: 0;
    border: 2px solid #fff;
    border-radius: 2px;
    background: var(--brand-primary, #8b5cf6);
    box-shadow: 0 1px 4px rgb(0 0 0 / 0.25);
    z-index: 3;
}

.lms-hw__obj-handle--nw { left: -0.4rem; top: -0.4rem; cursor: nwse-resize; }
.lms-hw__obj-handle--n { left: 50%; top: -0.4rem; transform: translateX(-50%); cursor: ns-resize; }
.lms-hw__obj-handle--ne { right: -0.4rem; top: -0.4rem; cursor: nesw-resize; }
.lms-hw__obj-handle--e { right: -0.4rem; top: 50%; transform: translateY(-50%); cursor: ew-resize; }
.lms-hw__obj-handle--se { right: -0.4rem; bottom: -0.4rem; cursor: nwse-resize; }
.lms-hw__obj-handle--s { left: 50%; bottom: -0.4rem; transform: translateX(-50%); cursor: ns-resize; }
.lms-hw__obj-handle--sw { left: -0.4rem; bottom: -0.4rem; cursor: nesw-resize; }
.lms-hw__obj-handle--w { left: -0.4rem; top: 50%; transform: translateY(-50%); cursor: ew-resize; }

.lms-hw__obj-toolbar {
    position: absolute;
    z-index: 5;
    pointer-events: auto;
}

.lms-hw__obj-toolbar-inner {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.45rem;
    border-radius: 0.55rem;
    background: var(--brand-card-bg, #fff);
    border: 1px solid color-mix(in srgb, var(--brand-border, #e5e5e5) 80%, #fff);
    box-shadow: 0 6px 16px rgb(15 23 42 / 0.12);
}

.lms-hw__obj-toolbar-label {
    font-size: 0.62rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--brand-muted, #737373);
    margin-right: 0.15rem;
}

.lms-hw__obj-toolbar button {
    appearance: none;
    border: 1px solid color-mix(in srgb, var(--brand-border, #e5e5e5) 80%, #fff);
    background: color-mix(in srgb, var(--brand-primary, #8b5cf6) 10%, #fff);
    color: var(--brand-text, #171717);
    border-radius: 0.45rem;
    min-height: 1.55rem;
    padding: 0.15rem 0.5rem;
    font-size: 0.68rem;
    font-weight: 700;
    cursor: pointer;
}

.lms-hw__obj-toolbar button[data-lms-hw-obj-delete] {
    color: #b91c1c;
    background: color-mix(in srgb, #ef4444 8%, #fff);
}

.lms-hw__obj--image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    user-select: none;
}

.lms-hw__obj-handle:focus {
    outline: none;
}

.lms-hw__obj-handle--legacy {
    right: -0.35rem;
    bottom: -0.35rem;
}

.lms-hw__text-tools {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid #e5e7eb;
}

.lms-hw__pop-grid--tight {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lms-hw__compact-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: #6b7280;
    margin-right: 0.35rem;
}

.lms-hw__canvas {
    display: block;
    width: 100%;
    height: 100%;
    max-width: 100%;
    background: #fff;
    cursor: crosshair;
    touch-action: none;
}

.lms-hw__meta {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.lms-hw__title-input {
    width: 100%;
    min-height: 2.5rem;
    padding: 0.55rem 0.8rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.7rem;
    font-size: 0.95rem;
}

.lms-hw__status {
    margin: 0;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--brand-primary, #8b5cf6);
}

.lms-hw__status.is-error {
    color: #b91c1c;
}

.lms-hw__footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    flex-wrap: wrap;
    flex-shrink: 0;
    margin-top: auto;
}

.lms-hw__btn {
    min-height: 2.7rem;
    padding: 0.55rem 1.1rem;
    border-radius: 0.8rem;
    border: 0;
    font-size: 0.95rem;
    font-weight: 800;
    cursor: pointer;
}

.lms-hw__btn--ghost {
    background: #f3f4f6;
    color: #111827;
}

.lms-hw__btn--primary {
    background: var(--brand-primary, #8b5cf6);
    color: var(--brand-button-text, #fff);
}

/* Fullscreen media viewer */
.lms-hw__viewer[hidden] {
    display: none !important;
}

.lms-hw__viewer {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: grid;
    grid-template-rows: 1fr auto;
    background: rgb(8 10 18 / 0.94);
}

.lms-hw__viewer-backdrop {
    position: absolute;
    inset: 0;
}

.lms-hw__viewer-close {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    z-index: 3;
    width: 2.6rem;
    height: 2.6rem;
    border: 0;
    border-radius: 999px;
    background: rgb(255 255 255 / 0.14);
    color: #fff;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    backdrop-filter: blur(8px);
}

.lms-hw__viewer-nav {
    position: absolute;
    top: 50%;
    z-index: 3;
    transform: translateY(-50%);
    width: 3.1rem;
    height: 3.1rem;
    border: 0;
    border-radius: 999px;
    background: rgb(255 255 255 / 0.14);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(8px);
    box-shadow: 0 8px 24px rgb(0 0 0 / 0.28);
}

.lms-hw__viewer-nav:hover {
    background: rgb(255 255 255 / 0.24);
}

.lms-hw__viewer-nav:disabled {
    opacity: 0.35;
    cursor: default;
}

.lms-hw__viewer-nav--prev { left: 0.85rem; }
.lms-hw__viewer-nav--next { right: 0.85rem; }

.lms-hw__viewer-stage {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    min-height: 0;
    padding: 3.5rem 4.5rem 1rem;
}

.lms-hw__viewer-stage img {
    max-width: min(96vw, 1280px);
    max-height: calc(100vh - 7.5rem);
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 0.65rem;
    background: #fff;
    box-shadow: 0 20px 60px rgb(0 0 0 / 0.45);
}

.lms-hw__viewer-bar {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.85rem 1.1rem 1rem;
    background: linear-gradient(180deg, transparent, rgb(0 0 0 / 0.55));
    color: #fff;
}

.lms-hw__viewer-meta {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.lms-hw__viewer-meta strong {
    font-size: 1rem;
    font-weight: 800;
}

.lms-hw__viewer-meta span {
    font-size: 0.82rem;
    opacity: 0.8;
}

.lms-hw__viewer-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.lms-hw__viewer-actions .lms-hw__btn--ghost {
    background: rgb(255 255 255 / 0.14);
    color: #fff;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.lms-hw__dialog--gallery .lms-hw__gallery-hint {
    flex-shrink: 0;
}

.lms-hw__dialog--gallery .lms-hw__footer {
    flex-shrink: 0;
}

.lms-hw__gallery-hint {
    margin: 0;
    font-size: 0.9rem;
    color: #525252;
}

.lms-hw__gallery-grid {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.85rem;
    overflow: auto;
    align-content: start;
    padding: 0.15rem;
}

.lms-hw__gallery-card {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.65rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.85rem;
    background: #fff;
}

.lms-hw__gallery-thumb {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    border-radius: 0.55rem;
    overflow: hidden;
}

.lms-hw__gallery-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    border-radius: 0.55rem;
    background: #f8fafc;
    border: 1px solid #eef2f7;
}

.lms-hw__gallery-card-title {
    margin: 0;
    font-size: 0.88rem;
    font-weight: 800;
}

.lms-hw__gallery-card-meta {
    margin: 0;
    font-size: 0.75rem;
    color: #737373;
}

.lms-hw__gallery-card-actions {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.lms-hw__gallery-card-actions a,
.lms-hw__gallery-card-actions button {
    flex: 1;
    min-height: 2rem;
    border-radius: 0.55rem;
    border: 1px solid #e5e7eb;
    background: #fff;
    font-size: 0.75rem;
    font-weight: 750;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.lms-hw__gallery-empty {
    grid-column: 1 / -1;
    padding: 1.4rem;
    border-radius: 0.85rem;
    border: 1px dashed #d1d5db;
    background: #fafafa;
    color: #525252;
    text-align: center;
}

/* Homework gallery on course landing */
.ms-homework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.ms-homework-card {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    padding: 0.75rem;
    border: 1px solid var(--brand-border, #e5e5e5);
    border-radius: 0.9rem;
    background: #fff;
}

.ms-homework-card__thumb {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    border-radius: 0.65rem;
    overflow: hidden;
}

.ms-homework-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    border-radius: 0.65rem;
    background: #f8fafc;
    border: 1px solid #eef2f7;
}

.ms-homework-card__title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--brand-text, #171717);
}

.ms-homework-card__meta {
    margin: 0;
    font-size: 0.8rem;
    color: var(--brand-muted, #737373);
}

.ms-homework-card__actions {
    display: flex;
    gap: 0.45rem;
}

.ms-homework-card__actions a,
.ms-homework-card__actions button {
    flex: 1;
    min-height: 2.2rem;
    border-radius: 0.65rem;
    border: 1px solid #e5e7eb;
    background: #fff;
    font-size: 0.82rem;
    font-weight: 750;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.ms-homework-empty {
    padding: 1.4rem;
    border-radius: 0.9rem;
    border: 1px dashed #d1d5db;
    background: #fafafa;
    color: #525252;
}

.ms-homework-empty strong {
    color: #171717;
}

/* Student file homework strip */
.ar-homework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.85rem;
}

.ar-homework-card {
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 0.65rem;
    background: #fff;
}

.ar-homework-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    border-radius: 0.5rem;
    background: #f8fafc;
    margin-bottom: 0.45rem;
}

.ar-homework-card p {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 700;
}

.ar-homework-card span {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: #737373;
}

@media (max-width: 640px) {
    .lms-hw__dock {
        right: 0.4rem;
        bottom: 0.4rem;
    }

    .lms-hw__dock-toggle {
        width: 3rem;
        height: 3rem;
    }

    .lms-hw__dock-toggle-avatar {
        width: 2.15rem;
        height: 2.15rem;
    }

    .lms-hw__dock-shell {
        min-width: 10rem;
    }

    .lms-hw__dialog {
        padding: 0.85rem;
    }

    .lms-hw__viewer-stage {
        padding: 3.2rem 0.75rem 0.75rem;
    }

    .lms-hw__viewer-nav--prev { left: 0.4rem; }
    .lms-hw__viewer-nav--next { right: 0.4rem; }

    .lms-hw__viewer-nav {
        width: 2.55rem;
        height: 2.55rem;
    }
}