:root {
  --msp-blue: #175f89;
  --msp-blue-soft: #e9f4fa;
  --msp-gold: #d49b18;
  --msp-green: #26745a;
  --msp-red: #9d3f3f;
  --msp-ink: #18313f;
  --msp-border: #b8cbd5;
  --msp-touch: 48px;
  --msp-control-text: 1rem;
  --msp-screen-text: clamp(1rem, 1.4vw, 1.25rem);
}

* { box-sizing: border-box; }
html, body { height: 100%; min-height: 100%; overflow: hidden; }
body { margin: 0; color: var(--msp-ink); background: #edf5f9; font-family: Arial, Helvetica, sans-serif; font-size: var(--msp-screen-text); }
button, input { font: inherit; }
button, summary, .home-button { font-size: var(--msp-control-text); }
button { min-height: var(--msp-touch); cursor: pointer; }
.app { width: 100%; height: 100dvh; min-height: 0; display: grid; grid-template-rows: auto minmax(0, 1fr); overflow: hidden; background: #edf5f9; }
.app:fullscreen { width: 100vw; height: 100vh; min-height: 0; overflow: hidden; background: #edf5f9; }
.app:fullscreen::backdrop { background: #edf5f9; }
.topbar { min-height: 72px; display: grid; grid-template-columns: minmax(250px, 1fr) auto; align-items: center; gap: 16px; padding: 11px 18px; color: #fff; background: #071018; }
.brand { min-width: 0; display: flex; align-items: center; gap: 14px; }
.brand-logo { display: inline-flex; border-radius: 6px; }
.brand h1 { display: grid; gap: .12rem; margin: 0; line-height: 1.05; }
.brand-framework { color: #a9dff4; font-size: 1em; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.brand-tool-name { font-size: clamp(1.3rem, 2vw, 2rem); }
.top-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.icon-button, .home-button { min-width: var(--msp-touch); min-height: var(--msp-touch); display: inline-grid; place-items: center; padding: 0 14px; border: 2px solid #263d51; border-radius: 8px; color: #fff; background: #122436; font-weight: 800; text-decoration: none; cursor: pointer; }
.icon-button { width: var(--msp-touch); padding: 0; }
.icon-button:hover, .icon-button:focus-visible, .home-button:hover, .home-button:focus-visible { border-color: #8fd8f3; color: #06111a; background: #149bd7; }
.icon { width: 24px; height: 24px; pointer-events: none; }
#multiStepProblemPlannerModel { min-width: 0; min-height: 0; height: 100%; overflow: hidden; }
.msp-tool { min-width: 0; min-height: 0; height: 100%; display: grid; grid-template-rows: auto auto minmax(0, 1fr); overflow: hidden; color: var(--msp-ink); }
.msp-toolbar { position: relative; z-index: 5; min-height: 66px; display: flex; align-items: center; gap: 10px; padding: 8px 14px; border-bottom: 1px solid var(--msp-border); background: #fff; overflow: visible; }
.msp-toolbar .toolbar-group { min-width: 0; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.msp-toolbar .toolbar-group:last-child { margin-left: auto; justify-content: flex-end; }
.msp-toolbar-extra:empty { display: none; }
.msp-toolbar button, .msp-toolbar summary, .msp-actions button, .msp-move-actions button, .msp-solve-card > button { min-height: var(--msp-touch); display: inline-flex; align-items: center; justify-content: center; padding: 0 15px; border: 1px solid #aebfca; border-radius: 8px; color: var(--msp-ink); background: #fff; font-weight: 800; }
.msp-toolbar button.primary, .msp-actions button.primary, .msp-solve-card > button.primary { border-color: #0c719e; color: #fff; background: var(--msp-blue); }
.msp-toolbar button:disabled { opacity: .45; cursor: not-allowed; }
.msp-toolbar button:hover, .msp-toolbar button:focus-visible, .msp-toolbar summary:hover, .msp-toolbar summary:focus-visible, .msp-actions button:hover, .msp-actions button:focus-visible { border-color: var(--msp-blue); box-shadow: 0 0 0 3px rgba(23,95,137,.18); }
.msp-menu { position: relative; }
.msp-menu > summary { min-width: 8rem; list-style: none; }
.msp-setup-menu > summary { display: grid; justify-items: start; gap: .12rem; min-width: 14rem; }
.msp-setup-menu > summary small { color: #49616d; font-size: 1em; font-weight: 700; }
.msp-menu > summary::-webkit-details-marker { display: none; }
.msp-menu[open] > summary { border-color: var(--msp-blue); background: var(--msp-blue-soft); }
.msp-menu .menu-panel { position: absolute; z-index: 30; top: calc(100% + 7px); left: 0; width: min(34rem, calc(100vw - 24px)); min-width: 18rem; padding: .75rem; border: 1px solid var(--msp-border); border-radius: .75rem; background: #fff; box-shadow: 0 1rem 2.4rem rgba(7,16,24,.2); }
.msp-menu fieldset { border: 0; margin: 0 0 .65rem; padding: 0; }
.msp-menu fieldset:last-child { margin-bottom: 0; }
.msp-menu legend { margin-bottom: .35rem; font-weight: 800; }
.msp-menu label { display: flex; gap: .55rem; align-items: flex-start; padding: .35rem; border-radius: .5rem; }
.msp-menu label:has(input:checked) { background: var(--msp-blue-soft); }

.msp-phase-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .55rem; padding: .65rem clamp(.7rem, 2vw, 1.4rem); background: #f5f8fa; border-bottom: 1px solid var(--msp-border); }
.msp-phase-nav button { --loop-colour: #149bd7; --loop-dark: #07597c; --loop-pale: #eaf8ff; position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .55rem; min-height: 3.35rem; padding: .4rem .65rem; border: 1px solid var(--msp-border); border-left: .5rem solid var(--loop-colour); border-radius: .7rem; background: #fff; color: var(--msp-ink); text-align: left; }
.msp-phase-nav button[data-msp-loop-stage="show-build"] { --loop-colour: #1f8f6a; --loop-dark: #155f48; --loop-pale: #eaf7f2; }
.msp-phase-nav button[data-msp-loop-stage="solve"] { --loop-colour: #b97800; --loop-dark: #704900; --loop-pale: #fff4dc; }
.msp-phase-nav button[data-msp-loop-stage="check"] { --loop-colour: #d95b73; --loop-dark: #8c3042; --loop-pale: #fdeef1; }
.msp-loop-number { display: inline-grid; place-items: center; width: 1.75rem; height: 1.75rem; border: 2px solid var(--loop-colour); border-radius: .45rem; color: var(--loop-dark); background: #fff; font-weight: 900; }
.msp-phase-nav button > strong { min-width: 0; color: var(--loop-dark); font-size: 1em; }
.msp-loop-return { color: var(--loop-dark); font-size: 1.25rem; font-weight: 900; }
.msp-phase-nav button[aria-current="step"] { border-color: var(--loop-colour); background: var(--loop-pale); box-shadow: inset 0 0 0 1px var(--loop-colour); }
.msp-phase-nav button:disabled { opacity: .52; }

.msp-workspace { min-height: 0; padding: clamp(.7rem, 2vw, 1.35rem); overflow: hidden; }
.msp-phase-panel { display: grid; gap: 1rem; max-width: 112rem; margin: 0 auto; }
.msp-phase-panel > header { max-width: 80rem; }
.msp-phase-panel h2 { margin: .15rem 0 0; font-size: clamp(1.15rem, 2.1vw, 1.75rem); line-height: 1.3; }
.msp-progress { margin: .2rem 0 0; color: #49616d; font-weight: 750; }
.msp-problem-context { max-width: 70rem; margin: 0; padding: .65rem .8rem; border-left: .3rem solid var(--msp-blue); background: #fff; line-height: 1.5; }
.msp-problem-highlight { padding: .04em .14em; border-radius: .22em; background: #ffe7a3; color: inherit; box-shadow: 0 0 0 2px #d39a00; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.msp-single-decision { width: min(100%, 58rem); margin-inline: auto; }
.msp-confirmed-summary { width: min(100%, 62rem); margin-inline: auto; padding: .8rem 1rem; border: 1px solid var(--msp-border); border-radius: .8rem; background: #fff; }
.msp-confirmed-summary p { margin: 0; }
.msp-confirmed-summary ul { display: grid; gap: .35rem; margin: .7rem 0 0; padding: 0; list-style: none; }
.msp-confirmed-summary li { display: flex; justify-content: space-between; gap: 1rem; padding-top: .35rem; border-top: 1px solid #dfe9ee; }
.msp-eyebrow { margin: 0; color: var(--msp-blue); font-weight: 850; letter-spacing: .035em; text-transform: uppercase; font-size: 1em; }
.msp-tool[data-loop-stage="show-build"] .msp-eyebrow { color: #155f48; }
.msp-tool[data-loop-stage="solve"] .msp-eyebrow { color: #704900; }
.msp-tool[data-loop-stage="check"] .msp-eyebrow { color: #8c3042; }
.msp-question-options, .msp-final-options, .msp-proposals, .msp-reason-card, .msp-quantity-card { border: 1px solid var(--msp-border); border-radius: .8rem; background: #fff; }
.msp-question-options, .msp-final-options, .msp-proposals { display: grid; gap: .5rem; padding: .85rem; }
.msp-question-options legend, .msp-final-options legend, .msp-proposals legend, .msp-reason-card legend { padding: 0 .3rem; font-weight: 850; }
.msp-question-options label, .msp-final-options label, .msp-proposals label, .msp-reason-card label { display: flex; gap: .65rem; align-items: flex-start; padding: .65rem; border: 1px solid transparent; border-radius: .6rem; }
.msp-question-options label:has(input:checked), .msp-final-options label:has(input:checked), .msp-proposals label:has(input:checked), .msp-reason-card label:has(input:checked) { border-color: var(--msp-blue); background: var(--msp-blue-soft); }
.msp-proposals small { display: block; margin-top: .3rem; color: #49616d; font-size: 1em; }

.msp-quantity-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: .65rem; }
.msp-quantity-card { margin: 0; padding: .65rem; min-width: 0; }
.msp-quantity-card legend { max-width: 100%; padding: 0 .25rem; font-weight: 750; }
.msp-segmented { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .3rem; }
.msp-segmented input { position: absolute; opacity: 0; pointer-events: none; }
.msp-segmented span { display: grid; place-items: center; min-height: 3rem; padding: .3rem; border: 1px solid var(--msp-border); border-radius: .5rem; text-align: center; font-size: 1em; font-weight: 700; }
.msp-segmented input:focus-visible + span { outline: 3px solid #ffbf47; outline-offset: 2px; }
.msp-segmented input:checked + span { border-color: var(--msp-blue); background: var(--msp-blue); color: #fff; }

.msp-step-list, .msp-solve-list, .msp-reason-list { display: grid; gap: .7rem; }
.msp-step-card, .msp-solve-card { border: 1px solid var(--msp-border); border-left: .45rem solid var(--msp-blue); border-radius: .8rem; background: #fff; padding: .85rem; box-shadow: 0 .15rem .5rem rgba(24,49,63,.08); }
.msp-step-heading, .msp-solve-card header { display: flex; flex-wrap: wrap; align-items: baseline; gap: .55rem; }
.msp-step-heading > span, .msp-solve-card header > span { color: var(--msp-blue); font-weight: 850; }
.msp-step-card p { margin: .55rem 0 0; }
.msp-unit { display: inline-block; padding: .1rem .4rem; border-radius: 999px; background: #eef2f4; font-size: 1em; }
.msp-move-actions, .msp-handoffs { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .65rem; }
.msp-handoffs a { display: inline-flex; align-items: center; min-height: 2.5rem; padding: .35rem .65rem; border: 1px solid var(--msp-blue); border-radius: .55rem; color: var(--msp-blue); font-weight: 750; text-decoration: none; }

.msp-model-grid, .msp-solve-layout { display: grid; grid-template-columns: minmax(28rem, 1.25fr) minmax(22rem, .85fr); gap: 1rem; align-items: start; }
.msp-model-grid.has-step-model { grid-template-columns: minmax(22rem, 1.05fr) minmax(18rem, .8fr) minmax(24rem, 1.05fr); }
.msp-solve-layout.is-faded { grid-template-columns: minmax(0, 1fr); }
.msp-dependency-host { display: grid; align-items: center; min-height: 19rem; padding: .65rem; border: 1px solid var(--msp-border); border-radius: .9rem; background: linear-gradient(145deg, #fff, #f4f8fa); overflow: hidden; }
.msp-dependency-host figure { margin: 0; width: 100%; min-height: 0; max-height: 100%; overflow: hidden; }
.msp-dependency-host svg { display: block; width: 100%; max-height: 33rem; }
.msp-dependency-host.is-compact { min-height: 0; height: clamp(12rem, 30vh, 16rem); }
.msp-dependency-host.is-compact figure, .msp-dependency-host.is-compact svg { width: 100%; height: 100%; max-height: none; }
.msp-reason-card { display: grid; gap: .35rem; margin: 0; padding: .65rem; }
.msp-reason-card label { font-size: 1em; padding: .5rem; }

/* The dependency chain is a classroom model, so its labels must remain legible
   when the SVG fills a board-width panel. Long labels retain the renderer's
   fitted transforms rather than forcing the diagram to overflow. */
.msp-tool .problem-dependency-step-label { font-size: 18px; }
.msp-tool .problem-dependency-operation { font-size: 28px !important; }
.msp-tool .problem-dependency-input { font-size: 20px; }
.msp-tool .problem-dependency-output { font-size: 19px; }
.msp-tool .problem-dependency-link-label { font-size: 17px; }
.msp-tool .problem-dependency-target text { font-size: 20px; }
.msp-representation-switch { display: flex; flex-wrap: wrap; justify-content: center; gap: .45rem; }
.msp-representation-switch button { min-height: var(--msp-touch); padding: .4rem .8rem; border: 1px solid var(--msp-border); border-radius: .55rem; color: var(--msp-ink); background: #fff; font-weight: 800; }
.msp-representation-switch button[aria-pressed="true"] { border-color: var(--msp-blue); color: #fff; background: var(--msp-blue); }
.msp-step-model-panel { display: grid; grid-template-columns: 1fr; gap: .55rem; align-items: stretch; padding: .65rem; border: 1px solid var(--msp-border); border-radius: .85rem; background: #fff; }
.msp-step-model-controls { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; align-content: start; }
.msp-step-model-controls fieldset { display: grid; gap: .4rem; margin: 0; padding: .55rem; border: 1px solid var(--msp-border); border-radius: .65rem; }
.msp-step-model-controls legend { padding: 0 .25rem; font-weight: 850; }
.msp-step-model-controls button { min-height: var(--msp-touch); padding: .4rem .65rem; border: 1px solid var(--msp-border); border-radius: .55rem; background: #fff; color: var(--msp-ink); font-weight: 750; text-align: left; }
.msp-step-model-controls button[aria-pressed="true"] { border-color: var(--msp-blue); background: var(--msp-blue-soft); box-shadow: inset .25rem 0 0 var(--msp-blue); }
.msp-single-step-host { min-height: 10rem; display: grid; place-items: stretch; overflow: hidden; }
.msp-single-step-host figure, .msp-single-step-host .diagram-frame, .msp-single-step-host svg { width: 100%; height: 100%; max-height: 14rem; margin: 0; }
.msp-replacement-model { width: min(100%, 72rem); min-height: clamp(18rem, 50vh, 32rem); margin-inline: auto; padding: .75rem; border: 1px solid var(--msp-border); border-radius: .9rem; background: #fff; }
.msp-replacement-model figure, .msp-replacement-model .diagram-frame, .msp-replacement-model svg { max-height: 30rem; }

.msp-solve-card.is-locked { border-left-color: #899ba4; background: #f2f5f6; }
.msp-solve-card.is-ready { border-left-color: var(--msp-gold); }
.msp-solve-card.is-complete { border-left-color: var(--msp-green); background: #f0faf6; }
.msp-calculation { display: flex; flex-wrap: wrap; align-items: center; gap: .55rem; margin: .8rem 0; font-size: clamp(1.2rem, 2.2vw, 1.7rem); font-weight: 800; }
.msp-calculation input { box-sizing: content-box; width: var(--msp-answer-capacity, 7ch); min-height: 2.8rem; padding: .25rem .5rem; border: 2px solid var(--msp-blue); border-radius: .55rem; font: inherit; text-align: center; }
.msp-complete-note { color: var(--msp-green); font-weight: 750; }
.msp-solve-step-actions { display: flex; flex-wrap: wrap; gap: .55rem; }
.msp-solve-step-actions button { min-height: var(--msp-touch); padding: .4rem .75rem; border: 1px solid var(--msp-border); border-radius: .55rem; background: #fff; color: var(--msp-ink); font-weight: 750; }
.msp-solve-step-actions button.primary { border-color: var(--msp-blue); background: var(--msp-blue); color: #fff; }
.msp-completed-steps { width: min(100%, 58rem); display: grid; gap: .4rem; margin: 0 auto; padding-left: 1.7rem; }
.msp-completed-steps li { display:flex; flex-wrap:wrap; align-items:baseline; gap:.15rem .7rem; padding: .45rem .65rem; border-left: .3rem solid var(--msp-green); background: #f0faf6; }

.msp-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .65rem; }
.msp-actions button { min-height: var(--msp-touch); }
.msp-feedback { margin: 1rem auto 0; max-width: 112rem; min-height: 3rem; padding: .75rem 1rem; border-left: .35rem solid var(--msp-blue); border-radius: .55rem; background: var(--msp-blue-soft); font-weight: 700; }
.msp-feedback[data-tone="error"] { border-color: var(--msp-red); background: #fff1f1; }
.msp-feedback[data-tone="success"] { border-color: var(--msp-green); background: #eefaf5; }
.msp-feedback[data-tone="hint"] { border-color: var(--msp-gold); background: #fff8e7; }
.visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }
.msp-print-brand { display: none; }
.instructions-dialog { width: min(700px, calc(100vw - 28px)); max-height: min(780px, calc(100vh - 28px)); padding: 0; border: 0; border-radius: 9px; color: var(--msp-ink); background: #fff; box-shadow: 0 24px 65px rgba(7,16,24,.36); }
.instructions-dialog::backdrop { background: rgba(7,16,24,.6); }
.instructions-header { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 10px 14px; color: #fff; background: #071018; }
.instructions-header h2 { margin: 0; }
.instructions-body { padding: 16px 18px; line-height: 1.5; overflow: auto; }
.instructions-body h3 { margin: 18px 0 6px; }
.instructions-body p, .instructions-body ul, .instructions-body ol { margin-top: 6px; }

@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr; padding: 10px 12px; }
  .top-actions { justify-content: flex-start; flex-wrap: wrap; }
  .msp-toolbar { align-items: stretch; flex-direction: column; }
  .msp-toolbar .toolbar-group:last-child { margin-left: 0; justify-content: flex-start; }
  .msp-toolbar .toolbar-group { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  .msp-toolbar .msp-menu, .msp-toolbar button, .msp-toolbar summary { width: 100%; }
  .msp-menu .menu-panel { position: fixed; top: auto; left: 8px; right: 8px; width: auto; max-height: calc(100vh - 110px); overflow: auto; }
  .msp-phase-nav { grid-template-columns: repeat(2, 1fr); }
  .msp-phase-nav button, .msp-actions button { min-height: var(--msp-touch); }
  .msp-phase-nav button { min-height: 3.65rem; font-size: 1rem; }
  .msp-model-grid, .msp-solve-layout { grid-template-columns: 1fr; }
  .msp-model-grid.has-step-model { grid-template-columns: 1fr; }
  .msp-step-model-panel { grid-template-columns: 1fr; }
  .msp-step-model-controls fieldset { grid-template-columns: 1fr; }
  .msp-dependency-host { min-height: 12rem; }
  .msp-quantity-grid { grid-template-columns: 1fr; }
  .msp-segmented span { font-size: 1rem; }
  .msp-confirmed-summary li { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .msp-replacement-model { min-height: 16rem; }
}

@media (min-width: 761px) and (max-width: 1120px) {
  .msp-model-grid.has-step-model { grid-template-columns: 1fr 1fr; }
  .msp-model-grid.has-step-model .msp-step-model-panel { grid-column: 1 / -1; }
}

/* Classroom displays need pupil-facing prose and choices to remain readable
   from the back of the room. Narrow personal-device layouts retain the
   compact base size so the complete decision stays on one screen. */
@media (min-width: 761px) {
  :root { --msp-screen-text: clamp(1.125rem, 1.7vw, 1.5rem); }
}

@media (min-width: 1121px) and (max-height: 950px) {
  .msp-workspace { padding-block: .75rem; }
  .msp-phase-panel { gap: .7rem; }
  .msp-step-model-panel { padding: .5rem; gap: .4rem; }
  .msp-step-model-controls { gap: .4rem; }
  .msp-step-model-controls fieldset { gap: .3rem; padding: .4rem; }
  .msp-step-model-controls button { min-height: 2.65rem; padding-block: .3rem; }
  .msp-single-step-host { min-height: 8.25rem; }
  .msp-single-step-host figure, .msp-single-step-host .diagram-frame, .msp-single-step-host svg { max-height: 11rem; }
}

@media (max-height: 900px), (max-width: 760px) {
  .topbar { min-height: 58px; gap: 8px; padding: 5px 10px; }
  .brand { gap: 9px; }
  .brand-logo img { width: clamp(8rem, 15vw, 10rem); max-height: 38px; }
  .brand-framework { display: none; }
  .brand-tool-name { font-size: clamp(1.125rem, 2vw, 1.35rem); }
  .top-actions { gap: 5px; }
  .msp-toolbar { min-height: 56px; padding: 4px 10px; }
  .msp-setup-menu > summary { min-width: 11rem; }
  .msp-setup-menu > summary small, .msp-eyebrow, .msp-progress { display: none; }
  .msp-phase-nav { gap: .35rem; padding: .35rem .7rem; }
  .msp-phase-nav button { min-height: var(--msp-touch); padding: .3rem .5rem; }
  .msp-workspace { padding: .5rem .7rem; }
  .msp-phase-panel { gap: .45rem; }
  .msp-phase-panel h2 { margin-top: 0; font-size: clamp(1.25rem, 2vw, 1.4rem); }
  .msp-problem-context { padding: .4rem .6rem; font-size: 1em; line-height: 1.35; }
  .msp-question-options, .msp-final-options, .msp-proposals { gap: .2rem; padding: .45rem .6rem; }
  .msp-question-options label, .msp-final-options label, .msp-proposals label, .msp-reason-card label { min-height: var(--msp-touch); padding: .3rem .45rem; }
  .msp-confirmed-summary { padding: .5rem .7rem; }
  .msp-confirmed-summary ul { gap: .2rem; margin-top: .35rem; }
  .msp-confirmed-summary li { padding-top: .2rem; }
  .msp-step-list, .msp-solve-list, .msp-reason-list { gap: .35rem; }
  .msp-step-card, .msp-solve-card { padding: .5rem .65rem; }
  .msp-move-actions, .msp-handoffs { margin-top: .35rem; }
  .msp-dependency-host, .msp-dependency-host.is-compact { min-height: 0; height: clamp(11rem, 31vh, 14rem); padding: .35rem; }
  .msp-dependency-host figure, .msp-dependency-host svg, .msp-dependency-host.is-compact figure, .msp-dependency-host.is-compact svg { width: 100%; height: 100%; min-height: 0; max-height: 100%; }
  .msp-reason-card { gap: .15rem; padding: .4rem .55rem; }
  .msp-replacement-model { min-height: 0; height: clamp(10rem, 31vh, 15rem); padding: .4rem; }
  .msp-calculation { margin: .4rem 0; }
  .msp-actions { gap: .4rem; }
  .msp-feedback { min-height: var(--msp-touch); margin-top: .45rem; padding: .5rem .7rem; }
}

@media (max-width: 760px) {
  .msp-toolbar { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: stretch; gap: 5px; }
  .msp-toolbar .toolbar-group { display: contents; }
  .msp-toolbar .msp-menu, .msp-toolbar button, .msp-toolbar summary { min-width: 0; width: 100%; padding-inline: .45rem; }
  .msp-toolbar .msp-setup-menu, .msp-toolbar-extra button { grid-column: span 3; }
  .msp-toolbar #mspBack, .msp-toolbar #mspNew, .msp-toolbar #mspStartAgain { grid-column: span 2; }
  .msp-setup-menu > summary { min-width: 0; }
  .msp-setup-menu > summary small { display: none; }
  .msp-phase-nav { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .25rem; padding-inline: .35rem; }
  .msp-phase-nav button { grid-template-columns: auto minmax(0, 1fr); gap: .25rem; min-height: 3.55rem; padding-inline: .3rem; font-size: 1rem; }
  .msp-loop-number { width: 1.5rem; height: 1.5rem; }
  .msp-loop-return { display: none; }
  .msp-confirmed-summary li { align-items: center; flex-direction: row; gap: .5rem; }
  .msp-dependency-host, .msp-dependency-host.is-compact { height: clamp(7rem, 17vh, 9rem); }
}

@media (max-width: 480px) {
  .msp-phase-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .msp-phase-nav button { min-height: var(--msp-touch); padding-inline: .5rem; }
  .msp-workspace { padding-block: .35rem; }
  .msp-phase-panel { gap: .3rem; }
}

@media print {
  @page { size: A4 landscape; margin: 8mm; }
  html, body, .app, .msp-tool { width: 100%; min-height: 0 !important; height: auto !important; background: #fff !important; }
  .topbar, .msp-toolbar, .msp-phase-nav, .msp-actions, .msp-feedback, .msp-handoffs, dialog, .classroom-tools-layer, .annotation-toolbar, .setup-share-dialog { display: none !important; }
  .msp-workspace { padding: 0; }
  .msp-print-brand { display: flex; align-items: center; justify-content: space-between; gap: 8mm; margin-bottom: 4mm; font-size: 9pt; font-weight: 800; }
  .msp-print-brand img { display: block; width: 38mm; height: auto; }
  .msp-phase-panel { gap: 5mm; }
  .msp-model-grid, .msp-solve-layout { grid-template-columns: 1.1fr .9fr; gap: 5mm; }
  .msp-dependency-host { min-height: 0; padding: 2mm; }
  .msp-dependency-host svg { max-height: 115mm; }
  .msp-step-card, .msp-solve-card, .msp-question-options, .msp-final-options, .msp-proposals, .msp-reason-card, .msp-quantity-card { break-inside: avoid; box-shadow: none; }
  .msp-tool { font-size: 9pt; }
}

.msp-placement-task,
.msp-operation-cards,
.msp-reverse-reason,
.msp-division-result {
  border: 1px solid var(--msp-line);
  border-radius: .8rem;
  background: #fff;
  padding: .55rem .75rem;
}
.msp-placement-task { display: grid; gap: .3rem; }
.msp-placement-task h3,
.msp-operation-cards legend,
.msp-reverse-reason legend { font-weight: 800; padding-inline: .3rem; }
.msp-placement-task h3,
.msp-placement-task p { margin: 0; }
.msp-current-information { display: grid; place-items: center; min-height: var(--msp-touch); border: 3px solid var(--msp-blue); border-radius: .7rem; background: var(--msp-blue-soft); padding: .55rem 1rem; font-size: clamp(1.2rem, 2vw, 1.6rem); text-align: center; }
.msp-current-information:focus { outline: 4px solid rgba(0, 141, 204, .28); outline-offset: 2px; }
.msp-placement-instruction { color: var(--msp-muted); font-weight: 700; text-align: center; }
.msp-operation-cards .msp-segmented { grid-template-columns: repeat(4, minmax(var(--msp-touch), 1fr)); }
.msp-operation-cards .msp-segmented span { display: grid; place-items: center; min-height: var(--msp-touch); font-size: clamp(1.35rem, 2.4vw, 2rem); }
.msp-reverse-reason { display: grid; gap: .3rem; }
.msp-reverse-reason label { display: flex; align-items: flex-start; gap: .55rem; min-height: var(--msp-touch); padding: .4rem .5rem; border: 1px solid transparent; border-radius: .55rem; }
.msp-reverse-reason label:has(input:checked) { border-color: var(--msp-blue); background: var(--msp-blue-soft); }
.msp-division-result { display: flex; flex-wrap: wrap; align-items: center; gap: .45rem .75rem; }
.msp-division-result p { margin: 0; }
.msp-division-result label { display: flex; align-items: center; gap: .35rem; font-weight: 800; }
.msp-division-result input { width: 5.5rem; min-height: var(--msp-touch); font: inherit; font-size: 1.15em; text-align: center; }
.msp-interpretation { flex-basis: 100%; }
.msp-dependency-host .linked-bar-models-model { width: 100%; height: 100%; margin: 0; }
.msp-dependency-host .linked-bar-models-visual { width: 100%; height: 100%; min-height: 0; }
.msp-dependency-host:has(.linked-bar-models-model) { min-height: 0; height: clamp(14rem, 40vh, 24rem); }

@media (min-width: 761px) and (max-height: 900px) {
  .msp-dependency-host:has(.linked-bar-models-model) { height: clamp(14.5rem, 36vh, 16rem); }
  .msp-dependency-host--planning:has(.linked-bar-models-model) { height: clamp(7.5rem, 18vh, 8rem); }
}

@media (max-height: 900px) {
  .msp-step-list--linked { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .msp-step-list--linked .msp-step-card { padding: .4rem .55rem; }
  .msp-step-list--linked .msp-step-heading { display: grid; gap: .15rem; }
  .msp-dependency-host--planning .linked-bar-models-model,
  .msp-dependency-host--planning .linked-bar-models-visual { min-height: 0; }
  .msp-dependency-host--planning .linked-bar-models-visual { gap: 1px; padding: 2px 8px 1px; }
  .msp-dependency-host--planning .linked-bar-models-steps { grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr); gap: 6px; }
  .msp-dependency-host--planning .linked-bar-step { gap: 1px; }
  .msp-dependency-host--planning .linked-bar-step-heading { min-height: 21px; }
  .msp-dependency-host--planning .linked-bar-step-label { font-size: 1rem; }
  .msp-dependency-host--planning .expanded-bar-model .bar-model-strip { min-height: 24px; }
  .msp-dependency-host--planning .expanded-bar-model .bar-model-strip > span { padding: 1px; border-width: 2px; border-right-width: 0; font-size: .78rem; }
  .msp-dependency-host--planning .expanded-bar-model .bar-model-strip > span:last-child { border-right-width: 2px; }
  .msp-dependency-host--planning .linked-bar-equal-groups-meta { gap: 0; }
  .msp-dependency-host--planning .linked-bar-group-size-label,
  .msp-dependency-host--planning .linked-bar-group-count-label,
  .msp-dependency-host--planning .linked-bar-remainder { padding-block: 0; font-size: .7rem; line-height: 1; }
  .msp-dependency-host--planning .linked-bar-group-size-label:empty { min-height: .45rem; }
  .msp-dependency-host--planning .linked-bar-group-count-label { padding-top: 2px; border-top-width: 1px; }
  .msp-dependency-host--planning .linked-bar-group-count-label::before,
  .msp-dependency-host--planning .linked-bar-group-count-label::after { top: -1px; width: 1px; height: 4px; }
  .msp-dependency-host--planning .linked-bar-connector { font-size: .68rem; }
  .msp-dependency-host--planning .linked-bar-connector span { font-size: 1.25rem; }
  .msp-dependency-host--planning .linked-bar-final-target { font-size: 1rem; line-height: 1; }
}

@media (max-width: 760px) {
  .msp-placement-task { gap: .2rem; }
  .msp-current-information { padding-block: .4rem; }
  .msp-dependency-host:has(.linked-bar-models-model),
  .msp-phase-panel:has(.msp-reverse-reason) .msp-dependency-host:has(.linked-bar-models-model) { height: 14.25rem; }
  .msp-dependency-host--planning:has(.linked-bar-models-model) { height: 6rem; padding: .2rem; }
  .msp-dependency-host--planning .linked-bar-models-steps { grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr); gap: 3px; }
  .msp-dependency-host--planning .linked-bar-step-heading { min-height: 17px; }
  .msp-dependency-host--planning .linked-bar-step-label { font-size: .82rem; }
  .msp-dependency-host--planning .expanded-bar-model .bar-model-strip { min-height: 17px; }
  .msp-dependency-host--planning .linked-bar-group-size-label:empty { min-height: .25rem; }
  .msp-dependency-host--planning .linked-bar-group-count-label { min-height: .25rem; }
  .msp-dependency-host--planning .linked-bar-final-target { font-size: .82rem; }
  .msp-phase-panel:has(.msp-dependency-host--planning) .msp-problem-context { padding-block: .25rem; line-height: 1.2; }
  .msp-phase-panel:has(.msp-dependency-host--planning) .msp-actions { flex-wrap: nowrap; gap: .3rem; }
  .msp-phase-panel:has(.msp-dependency-host--planning) .msp-actions button { padding-inline: .5rem; }
}

@media print {
  .msp-dependency-host:has(.linked-bar-models-model) { height: 105mm; }
}