/* Förstå tal: samma designsystem som Se matte (Industry-tokens, Barlow, ritningsramar),
   men med en lugn grön accent. Låg stimulans: en accentfärg, inga ljud, aldrig rött. */
:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #4f8566;
  --color-accent-2: #6e9480;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);
  --color-neutral-100: #f5f5f8; --color-neutral-200: #e7e7ea; --color-neutral-300: #d4d4d7;
  --color-neutral-400: #b7b7ba; --color-neutral-500: #98989b; --color-neutral-600: #7a7a7d;
  --color-neutral-700: #5d5d60; --color-neutral-800: #424244; --color-neutral-900: #2b2b2d;
  --color-accent-100: #eef8f1; --color-accent-200: #d5eedd; --color-accent-300: #b2dcc0;
  --color-accent-400: #8ec3a1; --color-accent-500: #6da583; --color-accent-600: #528869;
  --color-accent-700: #3d6a50; --color-accent-800: #2a4c39; --color-accent-900: #1b3225;
  --color-accent-2-100: #f0f7f2; --color-accent-2-200: #dbeae0; --color-accent-2-300: #c0d8c8;
  --color-accent-2-400: #a0bea9; --color-accent-2-500: #81a08b; --color-accent-2-600: #668371;
  --color-accent-2-700: #4d6557; --color-accent-2-800: #36493d; --color-accent-2-900: #233028;
  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;
  --space-1: 3.4px; --space-2: 6.8px; --space-3: 10.2px; --space-4: 13.6px; --space-6: 20.4px; --space-8: 27.2px;
  --shadow-lg: 0 12px 32px color-mix(in srgb, #2b2b2d 22%, transparent);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #1b1d1c; --color-surface: #232625; --color-text: #e8eae9;
    --color-accent: #7fb896; --color-accent-2: #93b9a3;
    --color-divider: color-mix(in srgb, #e8eae9 20%, transparent);
    --color-neutral-100: #2a2d2c; --color-neutral-200: #232625; --color-neutral-700: #b5b9b7; --color-neutral-800: #d0d3d1; --color-neutral-900: #0f1110;
    --color-accent-100: #213229; --color-accent-200: #2a4033; --color-accent-600: #8fc4a4; --color-accent-700: #a6d2b7; --color-accent-800: #c4e4d0;
  }
}
:root[data-theme="dark"] {
  --color-bg: #1b1d1c; --color-surface: #232625; --color-text: #e8eae9;
  --color-accent: #7fb896; --color-accent-2: #93b9a3;
  --color-divider: color-mix(in srgb, #e8eae9 20%, transparent);
  --color-neutral-100: #2a2d2c; --color-neutral-200: #232625; --color-neutral-700: #b5b9b7; --color-neutral-800: #d0d3d1; --color-neutral-900: #0f1110;
  --color-accent-100: #213229; --color-accent-200: #2a4033; --color-accent-600: #8fc4a4; --color-accent-700: #a6d2b7; --color-accent-800: #c4e4d0;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); font-size: 18px; line-height: 1.55; }
h1, h2, h3 { font-family: var(--font-heading); font-weight: var(--font-heading-weight); line-height: 1.12; letter-spacing: -0.015em; margin: 0; }
h1 { font-size: 44px; } h2 { font-size: 30px; } h3 { font-size: 24px; }
p { margin: 0; }
button { font-family: inherit; color: inherit; }
:focus { outline: none; }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }
.muted, .text-muted { color: color-mix(in srgb, var(--color-text) 62%, transparent); }
.small { font-size: 15px; }
.kicker, .card-kicker { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-accent-700); }
.card-kicker { font-size: 11px; }
.lead { font-size: 20px; margin-top: 4px; text-wrap: pretty; }
.center { min-height: 50vh; display: grid; place-items: center; }

/* — ram med hörnmarkeringar (som i Se matte) — */
.blueprint { position: relative; border: 1px solid var(--color-divider); }
.blueprint > .corner { position: absolute; width: 11px; height: 11px; color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.blueprint > .corner::before, .blueprint > .corner::after { content: ""; position: absolute; background: currentColor; }
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; } .blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; } .blueprint > .corner.br { bottom: -6px; right: -6px; }

/* — knappar och fält — */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 17px; line-height: 1.2;
  background: transparent; border: 1px solid var(--color-divider); border-radius: 0; padding: 9px 16px; min-height: 42px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover:not(:disabled) { background: var(--color-accent-600); }
.btn-primary:active:not(:disabled) { background: var(--color-accent-700); }
.btn-secondary:hover:not(:disabled) { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn-ghost { border-color: transparent; color: var(--color-accent-700); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-lg { min-height: 54px; font-size: 20px; padding: 10px 22px; }
.btn-icon { width: 46px; height: 46px; padding: 0; flex: none; }
.big-btn { min-width: 64px; min-height: 56px; font-size: 26px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label { font-size: 16px; color: color-mix(in srgb, var(--color-text) 75%, transparent); }
.input { width: 100%; min-height: 44px; padding: 8px 12px; font: inherit; font-size: 20px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: 0; }
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
.input-lg { min-height: 54px; }
.input.code { letter-spacing: .12em; text-transform: uppercase; }
textarea.input { resize: vertical; font-size: 18px; }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--color-divider); }
.seg-wide { display: flex; } .seg-wide .seg-btn { flex: 1; }
.seg-btn { border: 0; background: transparent; padding: 10px 16px; min-height: 46px; font-size: 17px; cursor: pointer; }
.seg-btn + .seg-btn { border-left: 1px solid var(--color-divider); }
.seg-btn.on { background: var(--color-accent); color: var(--color-bg); }
.seg-btn:not(.on):hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.tag { display: inline-flex; align-items: center; font-size: 13px; padding: 3px 10px; }
.tag-accent { background: var(--color-accent-100); color: var(--color-accent-800); }
.tag-neutral { background: var(--color-neutral-100); color: var(--color-neutral-800); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent-700); }
.note { padding: 12px 14px; border: 1px dashed var(--color-accent); background: var(--color-accent-100); font-size: 18px; }
.banner { padding: 10px 20px; background: var(--color-accent-100); border-bottom: 1px dashed var(--color-accent); text-align: center; }

/* — sidlayout — */
.nav { display: flex; align-items: center; gap: 12px; padding: 14px 24px; border-bottom: 1px solid var(--color-divider); }
.nav-brand { font-family: var(--font-heading); font-weight: 600; font-size: 22px; display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand-mark { width: 22px; height: 22px; border: 2px solid var(--color-accent); position: relative; }
.brand-mark::after { content: ""; position: absolute; left: 2px; top: 2px; bottom: 2px; width: 7px; background: var(--color-accent); }
.nav-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.nav-user { font-size: 16px; color: var(--color-neutral-700); }
.page { max-width: 900px; margin: 0 auto; padding: 28px 24px 64px; }
.stack { display: flex; flex-direction: column; gap: 20px; }
.narrow { max-width: 640px; }
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.row.between { justify-content: space-between; align-items: center; }
.grow { flex: 1; min-width: 200px; }
.panel { padding: 22px; }
.panel.stack { gap: 12px; }

/* — inloggning och profiler — */
.auth { max-width: 520px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; padding-top: 12px; }
.name-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.name-btn { min-height: 64px; font-size: 22px; font-family: var(--font-heading); font-weight: 600; background: var(--color-surface); border: 1px solid var(--color-divider); cursor: pointer; }
.name-btn:hover { border-color: var(--color-accent); background: var(--color-accent-100); }

/* — startsida — */
.area-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 24px; padding: 6px; }
.area { padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.area-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.pips, .round { display: flex; gap: 4px; }
.pip { flex: 1; height: 9px; border: 1px solid var(--color-divider); background: transparent; }
.pip.on { background: var(--color-accent); border-color: var(--color-accent); }
.pip.now { background: var(--color-accent-200); }
.round { max-width: 320px; }
.test-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.test-tile { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; padding: 16px; min-height: 96px; background: transparent; border: 1px solid var(--color-divider); cursor: pointer; text-align: left; }
.test-tile:hover:not(:disabled) { border-color: var(--color-accent); background: var(--color-accent-100); }
.test-tile:disabled { cursor: default; }
.test-tile.going { border-color: var(--color-accent); }
.tile-name { font-family: var(--font-heading); font-weight: 600; font-size: 24px; }

/* — test och övning — */
.test-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; }
.item-pips { display: flex; flex-wrap: wrap; gap: 4px; }
.ipip { min-width: 38px; height: 32px; padding: 0 4px; font-size: 13px; border: 1px solid var(--color-divider); background: transparent; cursor: pointer; }
.ipip.on { background: var(--color-accent-100); border-color: var(--color-accent-400); }
.ipip.now { outline: 2px solid var(--color-accent); outline-offset: -1px; font-weight: 600; }
.ipip.m { border-style: dashed; }
.item-panel { padding: 26px; min-height: 260px; }
.item { display: flex; flex-direction: column; gap: 20px; }
.item-q { display: flex; gap: 14px; align-items: flex-start; justify-content: space-between; }
.q-text { font-size: 22px; line-height: 1.45; text-wrap: pretty; max-width: 40em; }
.expr { font-family: var(--font-heading); font-size: 40px; font-weight: 600; letter-spacing: .02em; }
.fig-wrap { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.fig { width: 100%; max-width: 640px; height: auto; display: block; }
.fig.clickable { cursor: pointer; }
.fig.paint-mini { width: 124px; margin-top: 6px; }
.fig.paint { cursor: crosshair; touch-action: none; user-select: none; max-width: 560px; }
.fig-text { font-family: var(--font-body); font-size: 18px; fill: var(--color-text); }
.fig-acc { fill: var(--color-accent-700); font-weight: 600; }
.fig-on-acc { fill: var(--color-bg); font-weight: 600; }
.f-acc { fill: var(--color-accent); } .f-acc2 { fill: var(--color-accent-700); } .f-ink { fill: var(--color-text); }
.f-bg { fill: var(--color-bg); } .f-none { fill: transparent; } .f-dot { fill: var(--color-neutral-500); }
.f-sel { fill: var(--color-accent-100); } .f-field { fill: var(--color-accent-100); }
.s-ink { stroke: var(--color-text); } .s-acc { stroke: var(--color-accent); } .s-div { stroke: var(--color-divider); } .s-bg { stroke: var(--color-bg); }
.answer { display: flex; flex-direction: column; gap: 12px; }
.answer-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.answer-label { font-size: 18px; color: var(--color-neutral-700); }
.answer-input { width: 200px; min-height: 58px; font-size: 26px; }
.unit { font-size: 22px; }
.fields { display: flex; flex-direction: column; gap: 12px; }
.fields.inline { flex-direction: row; flex-wrap: wrap; gap: 24px; }
.seq { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.seq-given { font-family: var(--font-heading); font-size: 28px; font-weight: 600; min-width: 72px; text-align: center; padding: 8px 6px; border-bottom: 2px solid var(--color-divider); }
.seq .answer-input { width: 120px; }
.choices { display: flex; flex-direction: column; gap: 10px; }
.choices.big, .choices.inline { flex-direction: row; flex-wrap: wrap; }
.choice { display: flex; align-items: center; gap: 12px; text-align: left; min-height: 54px; padding: 10px 18px; font-size: 20px; background: transparent; border: 1px solid var(--color-divider); cursor: pointer; }
.choices.big .choice { font-family: var(--font-heading); font-weight: 600; font-size: 28px; min-width: 96px; justify-content: center; }
.choice:hover:not(:disabled) { background: color-mix(in srgb, var(--color-accent) 8%, transparent); }
.choice.on { background: var(--color-accent-100); border: 2px solid var(--color-accent); padding: 9px 17px; }
.choice .box { width: 20px; height: 20px; border: 1.5px solid var(--color-divider); flex: none; }
.choice.on .box { background: var(--color-accent); border-color: var(--color-accent); box-shadow: inset 0 0 0 3px var(--color-bg); }
.choice:disabled { cursor: default; }
.order-n { display: inline-grid; place-items: center; width: 28px; height: 28px; background: var(--color-accent); color: var(--color-bg); font-size: 16px; }
.order-line { font-size: 18px; color: var(--color-neutral-700); }
.tf { display: flex; flex-direction: column; gap: 12px; }
.tf-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 20px; }
.groups { display: flex; gap: 16px; flex-wrap: wrap; }
.group-box { padding: 8px; background: transparent; border: 1px solid var(--color-divider); cursor: pointer; width: min(260px, 100%); }
.group-box.on { border: 3px solid var(--color-accent); padding: 6px; background: var(--color-accent-100); }
.objects { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.obj-area { width: 100%; max-width: 460px; border: 1px dashed var(--color-divider); }
.obj-ctrl { display: flex; gap: 12px; }
.cards { display: flex; gap: 12px; }
.card-digit { width: 64px; height: 84px; display: grid; place-items: center; font-family: var(--font-heading); font-weight: 600; font-size: 40px; border: 1px solid var(--color-text); background: var(--color-surface); }
.keys { display: flex; gap: 8px; }
.key { min-width: 54px; font-size: 24px; }
.free { min-height: 120px; }
.scratch textarea { font-family: ui-monospace, Menlo, monospace; font-size: 18px; }
.flash { min-height: 230px; display: flex; flex-direction: column; gap: 14px; align-items: flex-start; justify-content: center; width: 100%; }
.mark-pick { margin-top: 4px; }

/* — huvudräkning — */
.mental { padding: 24px; display: flex; flex-direction: column; gap: 12px; align-items: flex-start; background: var(--color-accent-100); border-color: var(--color-accent-300); }
.mental-kicker { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--color-accent-700); }
.mental-text { font-size: 22px; }
.mental-btn { min-height: 72px; min-width: 220px; font-size: 26px; gap: 12px; }
.mental-count { font-size: 18px; color: var(--color-neutral-800); }
.mental-fallback { font-family: var(--font-heading); font-size: 36px; font-weight: 600; min-height: 1em; }

/* — återkoppling: aldrig rött — */
.fb { margin-top: 18px; padding: 14px 16px; font-size: 19px; }
.fb.ok { border: 1px solid var(--color-accent); background: var(--color-accent-100); font-weight: 600; }
.fb.look { border: 1px dashed var(--color-accent); background: var(--color-accent-100); display: flex; flex-direction: column; gap: 6px; }
.fb-title { font-family: var(--font-heading); font-weight: 600; font-size: 22px; }

/* — lärarvy — */
.wide { max-width: none; }
.page:has(.wide) { max-width: 1180px; }
.code-box { padding: 10px 16px; }
.code-big { font-family: var(--font-heading); font-size: 34px; font-weight: 600; letter-spacing: .14em; }
.table-wrap { overflow-x: auto; border: 1px solid var(--color-divider); }
.table { width: 100%; border-collapse: collapse; font-size: 16px; }
.table th { text-align: left; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text) 60%, transparent); padding: 10px; border-bottom: 1px solid var(--color-divider); white-space: nowrap; }
.table td { padding: 10px; border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent); vertical-align: top; }
.table tr.click { cursor: pointer; }
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }
.table tr.row-miss td:first-child { box-shadow: inset 3px 0 0 var(--color-accent); }
.w-bar { width: 32%; }
.bar { position: relative; height: 26px; border: 1px solid var(--color-divider); min-width: 140px; }
.bar-fill { position: absolute; inset: 0 auto 0 0; background: var(--color-accent-300); }
.bar-label { position: relative; padding: 0 8px; font-size: 14px; line-height: 24px; }
.resp { max-width: 260px; }
.scratch-view { margin: 6px 0 0; padding: 6px 8px; background: var(--color-surface); font-size: 13px; white-space: pre-wrap; }
.judge { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.chip { font-size: 14px; padding: 4px 10px; border: 1px solid var(--color-divider); background: transparent; cursor: pointer; }
.chip.on { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }

/* — dialog — */
.dialog-backdrop { position: fixed; inset: 0; display: grid; place-items: center; padding: 16px; background: color-mix(in srgb, var(--color-neutral-900) 50%, transparent); z-index: 10; }
.dialog { width: min(480px, 100%); display: flex; flex-direction: column; gap: 14px; padding: 22px; background: var(--color-bg); border: 1px solid var(--color-divider); box-shadow: var(--shadow-lg); }
.dialog-title { font-family: var(--font-heading); font-weight: 600; font-size: 26px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; }

@media (max-width: 640px) {
  body { font-size: 17px; }
  h1 { font-size: 36px; }
  .page { padding: 20px 16px 48px; }
  .nav { padding: 12px 16px; }
  .item-panel { padding: 18px; }
  .q-text { font-size: 20px; }
  .answer-input { width: 160px; }
}
@media print { .nav, .item-pips { display: none; } }

/* — bråk med vågrätt bråkstreck — */
.frac { display: inline-flex; flex-direction: column; align-items: center; vertical-align: middle; line-height: 1.05; margin: 0 .12em; font-size: .9em; }
.frac-n { padding: 0 .2em .06em; border-bottom: .09em solid currentColor; }
.frac-d { padding: .06em .2em 0; }
.choices.big .frac { font-size: .85em; }
.expr .frac { font-size: .8em; }
.small-frac { font-size: 12px; margin-right: 4px; }
.frac-wrap { display: inline-flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.frac-input { display: inline-flex; flex-direction: column; align-items: center; gap: 6px; }
.frac-in { width: 90px; min-height: 48px; font-size: 24px; text-align: center; }
.frac-bar { width: 104px; height: 3px; background: var(--color-text); }
.frac-toggle { font-size: 15px; min-height: 40px; }
.fig.fig-walk { max-width: 400px; }

/* — kladdruta för penna — */
.pad { display: flex; flex-direction: column; gap: 10px; }
.pad-label { font-size: 17px; color: var(--color-neutral-700); }
.pad-bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.pad-canvas { display: block; width: 100%; background: var(--color-surface); border: 1px solid var(--color-divider); touch-action: none; cursor: crosshair; user-select: none; -webkit-user-select: none; }
.pad-canvas.erasing { cursor: cell; }
.scratch-svg { display: block; margin-top: 6px; background: var(--color-surface); border: 1px solid var(--color-divider); color: var(--color-text); }

/* — tilldela test — */
.w-check { width: 44px; }
.check { display: inline-block; width: 22px; height: 22px; border: 1.5px solid var(--color-divider); vertical-align: middle; }
.check.on { background: var(--color-accent); border-color: var(--color-accent); box-shadow: inset 0 0 0 3px var(--color-bg); }
.big-chip { font-size: 16px; padding: 8px 14px; }

/* — testkoder — */
.code-mid { font-family: var(--font-heading); font-weight: 600; font-size: 24px; letter-spacing: .12em; }
.code-show { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 12px 0; }
.code-huge { font-family: var(--font-heading); font-weight: 600; font-size: clamp(56px, 12vw, 120px); letter-spacing: .14em; color: var(--color-accent-700); }
.dialog:has(.code-show) { width: min(760px, 100%); }
.table tr.row-new td { background: var(--color-accent-100); }

/* — klasser och användare — */
.stack.tight { gap: 8px; }
.seg-n { color: inherit; opacity: .6; font-size: .85em; }
.others summary { cursor: pointer; color: var(--color-neutral-700); font-size: 16px; margin-bottom: 8px; }

/* — rund pensel — */
.paint-frame { width: 100%; max-width: 560px; border: 2px solid var(--color-text); line-height: 0; }
.paint-canvas { display: block; width: 100%; touch-action: none; cursor: crosshair; user-select: none; -webkit-user-select: none; }
canvas.paint-mini { display: block; width: 130px; margin-top: 6px; border: 1px solid var(--color-text); }