/* =====================================================================
   sb9.3 - Lambert-Beers lov
   Stilark. Samme udtryk som de andre superanimationer (grundlaget er
   sb2.1 og sc1.4 med statuslinjen). Nyt nederst: valgkortene paa fane 1,
   skyderne, maaletabellen paa fane 2 og regnestykket paa tavlen paa
   fane 3.
   BEMAERK: decimaltal skrives med PUNKTUM i CSS (0.25rem) - aldrig med
   dansk komma. Dansk komma bruges kun i tekst, som brugeren laeser.
   ===================================================================== */

:root {
    --bund:        #1b1b21;
    --scene-bund:  #14141a;
    --panel:       #2b2b36;
    --panel-2:     #333340;
    --panel-3:     #3d3d4b;
    --linje:       #464655;
    --tekst:       #f2f3f5;
    --tekst-svag:  #a9b0ba;
    --tekst-mat:   #7e8590;

    --blaa:        #3d9ee0;
    --blaa-mork:   #2a76ac;
    --groen:       #3fae72;
    --groen-mork:  #2b7d51;
    --roed:        #e05446;
    --gul:         #f2c53d;
    --lilla:       #9b6bd6;

    --op:          #8ff0b4;   /* produkterne og taelleren */
    --ned:         #9fd3f7;   /* reaktanterne og naevneren */

    --radius:      10px;
    --radius-lil:  6px;
    --skygge:      0 4px 14px rgba(0, 0, 0, 0.35);
    --panel-bredde: 430px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; height: 100%; }

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bund);
    color: var(--tekst);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------------
   TOPLINJE
   --------------------------------------------------------------------- */
.top {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 16px;
    background-color: #15151b;
    border-bottom: 1px solid #33333f;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.4);
    z-index: 20;
    flex-shrink: 0;
}

/* I en samling i fuld skaerm staar knappen, der gendanner panelet, i hjoernet */
.samling-fuld .top { padding-left: 56px; }

.top h1 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.top h1 .ikon { font-size: 1.1rem; margin-right: 3px; color: var(--gul); }

.faneknapper {
    display: flex;
    gap: 6px;
    flex: 1;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.faneknapper::-webkit-scrollbar { display: none; }

.faneknap {
    background-color: var(--panel-2);
    color: var(--tekst-svag);
    border: 1px solid transparent;
    padding: 8px 14px;
    border-radius: var(--radius-lil);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.18s ease, color 0.18s ease;
}

.faneknap .nr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 19px;
    height: 19px;
    border-radius: 50%;
    background-color: var(--panel-3);
    color: var(--tekst-svag);
    font-size: 0.7rem;
    flex-shrink: 0;
}

.faneknap:hover { background-color: var(--panel-3); color: var(--tekst); }
.faneknap.aktiv { background-color: var(--blaa); color: #ffffff; }
.faneknap.aktiv .nr { background-color: rgba(255, 255, 255, 0.25); color: #ffffff; }

.ikonknap {
    background: transparent;
    border: 1px solid #4a4a58;
    color: var(--tekst-svag);
    border-radius: 4px;
    width: 30px;
    height: 28px;
    font-size: 0.9rem;
    cursor: pointer;
    flex-shrink: 0;
}

.ikonknap:hover { background-color: var(--panel-3); color: var(--tekst); }
.ikonknap.tekstknap { width: auto; padding: 0 10px; font-family: inherit; font-size: 0.82rem; font-weight: 600; }
.quizknap.loest { border-color: #5fcf92; color: #b8f0cf; }

/* ---------------------------------------------------------------------
   HOVEDLAYOUT
   --------------------------------------------------------------------- */
main { flex: 1; position: relative; min-height: 0; }

.fane {
    position: absolute;
    inset: 0;
    display: none;
    grid-template-columns: minmax(0, 1fr) var(--panel-bredde);
}

.fane.aktiv { display: grid; }

/* Scenen: vaeggen fra sc1.4 tegnet med CSS, tavlen og bakken ovenpaa og
   statuslinjen nederst. Skriften paa tavlen foelger scenens stoerrelse. */
.scene {
    position: relative;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    container-type: size;
    background:
        repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 64px),
        linear-gradient(#262833, #1d1f27);
}

.arbejde {
    --fs: clamp(20px, min(3.7cqw, 5.4cqh), 46px);
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(10px, 2.2cqh, 22px);
    padding: clamp(10px, 2cqh, 22px) clamp(12px, 3cqw, 34px);
}

/* ---------------------------------------------------------------------
   HOEJRE SPALTE
   --------------------------------------------------------------------- */
.panel {
    background-color: var(--panel);
    border-left: 1px solid #1f1f27;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
    min-width: 0;
    scrollbar-width: thin;
    scrollbar-color: #4d4d5c var(--panel);
}

.panel::-webkit-scrollbar { width: 9px; }
.panel::-webkit-scrollbar-track { background: var(--panel); }
.panel::-webkit-scrollbar-thumb { background: #4d4d5c; border-radius: 5px; }

.kort {
    background-color: rgba(0, 0, 0, 0.22);
    border: 1px solid #3a3a47;
    border-radius: var(--radius);
    padding: 11px;
}

.kort > h2 {
    margin: 0 0 8px 0;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--gul);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
}

.kort.opgavekort { border-left: 3px solid var(--lilla); }

.kort > h2 .taeller {
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: none;
    color: var(--tekst-mat);
    white-space: nowrap;
}

.kort > h2 .taeller b { color: var(--tekst); }

.note-tekst { margin: 0 0 4px; font-size: 0.92rem; line-height: 1.5; color: #c8ced6; }

@keyframes ryst {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-5px); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}

@keyframes glimt {
    0%   { box-shadow: 0 0 0 0 rgba(63, 174, 114, 0.55); }
    70%  { box-shadow: 0 0 0 12px rgba(63, 174, 114, 0); }
    100% { box-shadow: 0 0 0 0 rgba(63, 174, 114, 0); }
}

.opgavekort.sejr { border-left-color: var(--groen); animation: glimt 0.9s ease-out 2; }

/* Forklaringen i kortet, naar opgaven er loest */
.forklaring {
    margin-top: 10px;
    padding: 10px 12px;
    border-left: 3px solid var(--groen);
    border-radius: 0 var(--radius-lil) var(--radius-lil) 0;
    background-color: rgba(63, 174, 114, 0.08);
}

.fk-broek { margin-bottom: 8px; font-size: 1.15rem; font-weight: 700; color: #d6ffe8; }
.forklaring p { margin: 0; font-size: 0.92rem; line-height: 1.55; color: #dde3ea; }

/* En broek med taeller over naevner, i panelet og i teorien */
.vbroek {
    display: inline-flex;
    flex-direction: column;
    vertical-align: middle;
    text-align: center;
    line-height: 1.2;
    margin: 0 2px;
}

.vbroek > span { padding: 0 4px; white-space: nowrap; }
.vbroek > span:first-child { border-bottom: 2px solid currentColor; }

/* ---------------------------------------------------------------------
   KNAPPER
   --------------------------------------------------------------------- */
.knapper { display: flex; flex-direction: column; gap: 7px; }

.knap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background-color: var(--panel-2);
    color: var(--tekst);
    border: 1px solid #4a4a58;
    border-radius: var(--radius-lil);
    padding: 8px 11px;
    font-family: inherit;
    font-size: 0.86rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
}

.knap:hover:not(:disabled) { background-color: var(--panel-3); border-color: #5e5e70; }
.knap:active:not(:disabled) { transform: scale(0.985); }
.knap:disabled { opacity: 0.4; cursor: not-allowed; }

.knap.blaa { background-color: var(--blaa-mork); border-color: var(--blaa); }
.knap.blaa:hover:not(:disabled) { background-color: var(--blaa); }

/* Den knap, der er det naturlige naeste skridt, banker stille. */
@keyframes bank {
    0%   { box-shadow: 0 0 0 0 rgba(61, 158, 224, 0.6); }
    70%  { box-shadow: 0 0 0 11px rgba(61, 158, 224, 0); }
    100% { box-shadow: 0 0 0 0 rgba(61, 158, 224, 0); }
}

.knap.banker { animation: bank 1.7s ease-out infinite; }

/* ---------------------------------------------------------------------
   OVERLAYS: teorien og quizzen
   --------------------------------------------------------------------- */
.overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(8, 8, 12, 0.78);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 50;
}

.overlay.vis { display: flex; }

.overlay-boks {
    background-color: var(--panel);
    border: 1px solid var(--linje);
    border-radius: 14px;
    box-shadow: var(--skygge);
    max-width: 640px;
    width: 100%;
    max-height: 100%;
    overflow-y: auto;
    padding: 22px 24px;
}

.overlay-boks h2 { margin: 0 0 12px 0; font-size: 1.15rem; color: var(--blaa); }
.overlay-boks p { margin: 0 0 10px; font-size: 0.95rem; line-height: 1.55; color: #dde3ea; }
.overlay-boks p.genveje { font-size: 0.85rem; color: var(--tekst-svag); margin-top: 12px; }

.overlay-boks h3.teori-hoved {
    margin: 16px 0 6px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gul);
}

.teori-trin { margin: 0 0 12px; padding-left: 22px; }
.teori-trin li { margin: 0 0 5px; font-size: 0.95rem; line-height: 1.5; color: #dde3ea; }
.teori-trin li::marker { color: var(--gul); font-weight: 700; }

.eksempel {
    margin: 4px 0 12px;
    padding: 10px 14px;
    border-left: 4px solid var(--lilla);
    border-radius: 0 var(--radius-lil) var(--radius-lil) 0;
    background-color: rgba(255, 255, 255, 0.05);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--tekst);
}

.eksempel-hoved {
    display: block;
    margin-bottom: 5px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--lilla);
}

kbd {
    display: inline-block;
    padding: 1px 6px;
    border: 1px solid #5e5e70;
    border-bottom-width: 2px;
    border-radius: 4px;
    background-color: var(--panel-2);
    font-family: inherit;
    font-size: 0.8rem;
    color: var(--tekst);
}

/* ---------------------------------------------------------------------
   RUNDVISNINGEN (samme som i sc1.4)
   --------------------------------------------------------------------- */
.rundvisning { position: fixed; inset: 0; z-index: 200; }
.rundvisning[hidden] { display: none; }

.rundvisning-baggrund {
    position: fixed;
    inset: 0;
    background: transparent;
    cursor: pointer;
}

.rundvisning-spot {
    position: fixed;
    border-radius: 10px;
    box-shadow: 0 0 0 9999px rgba(8, 8, 13, 0.74);
    outline: 2px solid var(--gul);
    outline-offset: 3px;
    pointer-events: none;
    transition: top 0.22s ease, left 0.22s ease, width 0.22s ease, height 0.22s ease;
}

.rundvisning-boks {
    position: fixed;
    width: 300px;
    max-width: calc(100vw - 28px);
    background-color: var(--panel);
    border: 1px solid var(--linje);
    border-radius: var(--radius);
    box-shadow: var(--skygge);
    padding: 14px 16px;
    transition: top 0.22s ease, left 0.22s ease;
}

.rundvisning-hoved {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.rundvisning-tal {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    color: var(--tekst-mat);
}

.rundvisning-luk {
    background: transparent;
    border: none;
    color: var(--tekst-svag);
    font-size: 0.9rem;
    line-height: 1;
    cursor: pointer;
    padding: 2px 4px;
}

.rundvisning-luk:hover { color: var(--tekst); }

.rundvisning-boks h3 { margin: 0 0 6px 0; font-size: 1rem; color: var(--gul); }
.rundvisning-boks p { margin: 0; font-size: 0.87rem; line-height: 1.5; color: #c8ced6; }

.rundvisning-knapper {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-top: 14px;
}

.rundvisning-knapper .knap { flex: 1; justify-content: center; }

/* ---------------------------------------------------------------------
   STATUSLINJEN nederst i scenen (som sc1.4): naeste skridt, fejl, hint og
   ros, og den ene knap. Her staar den i scenens kolonne, ikke oven paa
   et laerred.
   --------------------------------------------------------------------- */
.statuslinje {
    position: relative;
    flex: 0 0 auto;
    z-index: 4;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 68px;
    padding: 10px 14px;
    border-top: 1px solid #33343f;
    border-left: 5px solid #4a4a58;
    background-color: #191a21;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.st-tekst {
    flex: 1;
    margin: 0;
    font-size: 1rem;
    line-height: 1.45;
    color: #cfd6de;
}

.st-tekst:empty::before { content: "\00a0"; }
.st-tekst sub { font-size: 0.7em; }

/* Maerket forrest i linjen: Hint 2 af 3, Ikke endnu, Rigtigt */
.b-maerke {
    display: inline-block;
    margin-right: 7px;
    padding: 2px 9px;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.1);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #dfe4ea;
    vertical-align: 1px;
}

.b-maerke.stor { font-size: 0.95rem; padding: 3px 12px; }

.statuslinje.skidt { border-left-color: var(--roed); background-color: #231a1c; }
.statuslinje.skidt .st-tekst { color: #ffb3aa; }
.statuslinje.skidt .b-maerke { background-color: rgba(224, 84, 70, 0.3); color: #ffd7d2; }

.statuslinje.god { border-left-color: var(--groen); background-color: #17241e; }
.statuslinje.god .st-tekst { color: #b8f0cf; }
.statuslinje.god .b-maerke { background-color: rgba(63, 174, 114, 0.35); color: #d6ffe8; }

.statuslinje.hint,
.statuslinje.gul { border-left-color: var(--gul); background-color: #23201a; }
.statuslinje.hint .st-tekst,
.statuslinje.gul .st-tekst { color: #f7e4ab; }
.statuslinje.hint .b-maerke,
.statuslinje.gul .b-maerke { background-color: rgba(242, 197, 61, 0.3); color: #fff2cc; }

.statuslinje.peger { border-left-color: var(--blaa); }

@keyframes st-ryst {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-7px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(2px); }
}

.statuslinje.ryster { animation: st-ryst 0.4s ease-in-out 1; }

/* Hjaelpeknappen: stor nok til at oejet finder den af sig selv */
.statuslinje .knap {
    flex: 0 0 auto;
    justify-content: center;
    min-width: 190px;
    padding: 12px 20px;
    font-size: 0.98rem;
    font-weight: 700;
}

.knap.hjaelp {
    background-color: rgba(242, 197, 61, 0.12);
    border-color: rgba(242, 197, 61, 0.65);
    color: #f7e4ab;
}

.knap.hjaelp:hover:not(:disabled) { background-color: rgba(242, 197, 61, 0.24); border-color: var(--gul); color: #fff6d8; }

/* Efter et forkert svar peger knappen stille paa sig selv */
@keyframes knap-peg {
    0%, 100% { box-shadow: 0 0 0 0 rgba(242, 197, 61, 0); }
    50% { box-shadow: 0 0 0 5px rgba(242, 197, 61, 0.22); }
}

.knap.hjaelp.peg { animation: knap-peg 1.9s ease-in-out infinite; border-color: var(--gul); }

.knap.videre {
    background-color: var(--groen-mork);
    border-color: #5fcf92;
    color: #ffffff;
}

.knap.videre:hover:not(:disabled) { background-color: var(--groen); }

.forfraknap {
    flex: 0 0 auto;
    background-color: rgba(20, 20, 28, 0.85);
    color: var(--tekst-svag);
    border: 1px solid #4a4a58;
    border-radius: 999px;
    padding: 5px 12px;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
}

.forfraknap:hover { color: var(--tekst); border-color: #6e6e80; background-color: var(--panel-3); }


/* ---------------------------------------------------------------------
   OPGAVELINJEN over tavlen og TAVLEN (farverne fra sc1.4)
   --------------------------------------------------------------------- */
.opgavelinje {
    width: min(100%, 1000px);
    margin: 0;
    padding-left: 12px;
    border-left: 4px solid var(--gul);
    font-size: max(16px, calc(var(--fs) * 0.62));
    font-weight: 600;
    line-height: 1.35;
    color: #e9eef4;
}

.tavle {
    position: relative;
    width: min(100%, 1000px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--fs) * 0.45);
    padding: calc(var(--fs) * 1.15 + 6px) 22px calc(var(--fs) * 0.6);
    background: linear-gradient(135deg, #22302b, #1b2622);
    border: 10px solid #6d4c2f;
    border-radius: 8px;
    box-shadow: 3px 5px 0 rgba(0, 0, 0, 0.35), inset 0 0 0 2px rgba(0, 0, 0, 0.45);
    color: #e9eee9;
    transition: box-shadow 0.3s ease;
}

.tavle.faerdig { box-shadow: 3px 5px 0 rgba(0, 0, 0, 0.35), inset 0 0 0 2px rgba(0, 0, 0, 0.45), 0 0 0 3px rgba(63, 174, 114, 0.75); }
.tavle.vist { box-shadow: 3px 5px 0 rgba(0, 0, 0, 0.35), inset 0 0 0 2px rgba(0, 0, 0, 0.45), 0 0 0 3px rgba(242, 197, 61, 0.65); }
.tavle.ryst { animation: ryst 0.35s ease 1; }

.tv-navn {
    position: absolute;
    top: 8px;
    left: 16px;
    font-size: max(13px, calc(var(--fs) * 0.48));
    font-weight: 700;
    color: #9fb1a9;
}

@keyframes stempel-ind {
    0% { transform: scale(0.4) rotate(-6deg); opacity: 0; }
    60% { transform: scale(1.1) rotate(2deg); opacity: 1; }
    100% { transform: scale(1) rotate(0); opacity: 1; }
}

.tv-stempel {
    position: absolute;
    top: 8px;
    right: 14px;
    padding: 4px 14px;
    border: 2.5px solid #5fcf92;
    border-radius: 9px;
    background-color: rgba(20, 44, 32, 0.95);
    color: #8ff0b4;
    font-size: max(14px, calc(var(--fs) * 0.5));
    font-weight: 800;
    letter-spacing: 0.04em;
    animation: stempel-ind 0.45s ease-out 1;
}

.tv-stempel.gul { border-color: var(--gul); background-color: rgba(48, 40, 18, 0.95); color: #f5dd8a; }


/* ----- Brikkerne ------------------------------------------------------------- */
.brik {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.3em 0.55em;
    border: 2px solid;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 700;
    line-height: 1.15;
    white-space: nowrap;
    cursor: grab;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    box-shadow: 0 3px 0 rgba(0, 0, 0, 0.35);
    transition: transform 0.12s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.brik:hover { transform: translateY(-2px); }
.brik.stof { background-color: #22323d; border-color: #3f6f88; color: #e8f4fb; }
.brik.stof:hover { border-color: var(--blaa); }
.brik.tegn { min-width: 2em; background-color: #2e2840; border-color: #5b4b86; color: #e6dcff; }
.brik.tegn:hover { border-color: var(--lilla); }
.brik.eks { min-width: 2em; background-color: #3a3220; border-color: #7a6425; color: var(--gul); }
.brik.eks:hover { border-color: var(--gul); }

/* I broeken: mindre kant, og eksponenten sidder hoejt efter stoffet */
.brik.i-zone { font-size: calc(var(--fs) * 0.78); padding: 0.12em 0.32em; box-shadow: none; }
.brik.i-zone.tegn { min-width: 0; padding: 0.12em 0.22em; }
.brik.i-zone.eks {
    align-self: flex-start;
    min-width: 0;
    margin-left: -3px;
    padding: 0.02em 0.28em;
    font-size: calc(var(--fs) * 0.52);
}

.brik.rod { border-color: var(--roed); background-color: rgba(224, 84, 70, 0.28); box-shadow: 0 0 0 3px rgba(224, 84, 70, 0.35); animation: ryst 0.35s ease 1; }
.brik.op { border-color: #5fcf92; background-color: rgba(63, 174, 114, 0.22); color: #d6ffe8; }
.brik.ned { border-color: #6cb6ea; background-color: rgba(61, 158, 224, 0.22); color: #dcefff; }
.brik.gul { border-color: var(--gul); background-color: rgba(242, 197, 61, 0.16); color: var(--gul); }
.brik.slaebes { opacity: 0.25; }

/* Brikken, der foelger musen. Den svaever lidt over musen, saa den
   groenne streg under den kan ses. */
.spoegelse {
    position: fixed;
    z-index: 300;
    margin: 0;
    pointer-events: none;
    opacity: 0.92;
    transform: translateY(-60%) scale(1.06) rotate(-2deg);
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.5);
}

.spoegelse.ud { opacity: 0.55; border-color: var(--roed); }

/* Den groenne streg, der viser, hvor brikken lander */
@keyframes mark-puls { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }

.mark {
    width: 5px;
    align-self: stretch;
    min-height: calc(var(--fs) * 1.1);
    border-radius: 3px;
    background-color: #5fcf92;
    box-shadow: 0 0 10px #5fcf92;
    animation: mark-puls 0.7s ease-in-out infinite;
}

/* ----- Bakken under tavlen ------------------------------------------------------ */
.bakke {
    width: min(100%, 1000px);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 22px;
    padding: 10px 14px 12px;
    border: 1.5px solid #454859;
    border-radius: 14px;
    background: linear-gradient(#2d303b, #262833);
    box-shadow: 2px 4px 0 rgba(0, 0, 0, 0.3);
}

.bk-gruppe { display: flex; flex-direction: column; align-items: center; gap: 6px; }

.bk-hoved {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #8d93a3;
}

.bk-brikker { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.bakke .brik { font-size: max(16px, calc(var(--fs) * 0.62)); }
.bakke .brik.eks { font-size: max(19px, calc(var(--fs) * 0.8)); padding-top: 0.15em; padding-bottom: 0.15em; }
.bakke.laast .brik { opacity: 0.45; cursor: default; }
.bakke.laast .brik:hover { transform: none; }

/* ---------------------------------------------------------------------
   LISTEN med opgaverne i panelet: én raekke pr. opgave
   --------------------------------------------------------------------- */
.opg-liste { display: flex; flex-direction: column; gap: 10px; }

.opg-hoved {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--tekst-mat);
}

.opg-tal { letter-spacing: 0.02em; text-transform: none; }

.opg-raekker { display: flex; flex-direction: column; gap: 4px; }

.opg-raekke {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    padding: 6px 9px;
    border: 1px solid #4a4a58;
    border-radius: var(--radius-lil);
    background-color: var(--panel-2);
    color: var(--tekst);
    font-family: inherit;
    font-size: 0.93rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.opg-raekke:hover { background-color: var(--panel-3); border-color: #5e5e70; }

.or-nr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background-color: var(--panel-3);
    font-size: 0.78rem;
    font-weight: 700;
}

.or-navn { flex: 1; min-width: 0; }
.or-m { font-style: normal; font-size: 0.85rem; color: #7ee0a8; }
.or-m:empty { display: none; }
.opg-raekke.valgt { border-color: var(--blaa); background-color: rgba(61, 158, 224, 0.18); }
.opg-raekke.loest { border-color: rgba(63, 174, 114, 0.75); }
.opg-raekke.loest .or-nr { background-color: var(--groen-mork); color: #ffffff; }
.opg-raekke.loest.valgt { border-color: var(--blaa); }
.opg-raekke.stjerne .or-m { color: var(--gul); }

.tjekknap {
    flex: 0 0 auto;
    padding: 0.55em 1em;
    border: 1px solid #5fcf92;
    border-radius: var(--radius);
    background-color: var(--groen-mork);
    color: #ffffff;
    font-family: inherit;
    font-size: max(15px, calc(var(--fs) * 0.55));
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
    transition: background-color 0.15s ease;
}

.tjekknap:hover { background-color: var(--groen); }
.tjekknap:active { transform: scale(0.97); }

/* ---------------------------------------------------------------------
   FANE 1 OG 2: toppen med spoergsmaalet og laerredet
   --------------------------------------------------------------------- */
.sp-top {
    --fs: clamp(20px, min(3.4cqw, 5cqh), 40px);
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 12px clamp(12px, 3cqw, 30px) 2px;
}

.sp-top .opgavelinje { width: 100%; max-width: 1000px; }

.valgrad {
    display: flex;
    gap: 12px;
    width: 100%;
    max-width: 1000px;
    border-radius: 12px;
}

.valgrad:empty { display: none; }
.valgrad.lys { outline: 2px solid var(--gul); outline-offset: 4px; }

.valg-kort {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    padding: 7px 12px;
    border: 2px solid #4f5262;
    border-radius: var(--radius);
    background-color: var(--panel-2);
    color: var(--tekst);
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.valg-kort .vk-t { font-size: max(19px, calc(var(--fs) * 0.68)); font-weight: 800; line-height: 1.2; }
.valg-kort .vk-n { font-size: 0.86rem; font-weight: 600; color: var(--tekst-svag); }
.valg-kort:hover:not(.laast) { border-color: var(--blaa); background-color: var(--panel-3); }
.valg-kort.laast { cursor: default; opacity: 0.5; }
.valg-kort.valgt { opacity: 1; border-color: var(--blaa); background-color: rgba(61, 158, 224, 0.2); }
.valg-kort.rigtig { opacity: 1; border-color: #5fcf92; background-color: rgba(63, 174, 114, 0.22); }
.valg-kort.rigtig .vk-n { color: #b8f0cf; }
.valg-kort.forkert { opacity: 1; border-color: var(--roed); background-color: rgba(224, 84, 70, 0.16); }

.laerred-ramme { position: relative; flex: 1; min-height: 0; }

.laerred-ramme canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
}

/* ----- Panelet paa fane 1: stof og skydere ---------------------------------------- */
.stoffer { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; border-radius: 8px; }
.stoffer.lys { outline: 2px solid var(--gul); outline-offset: 3px; }

.stof-knap {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid #4a4a58;
    border-radius: var(--radius-lil);
    background-color: var(--panel-2);
    color: var(--tekst);
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
}

.stof-knap:hover { background-color: var(--panel-3); }
.stof-knap.valgt { border-color: var(--blaa); background-color: rgba(61, 158, 224, 0.22); }

.skyder-boks {
    margin-bottom: 8px;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.03);
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.skyder-boks.lys { border-color: var(--gul); background-color: rgba(242, 197, 61, 0.1); }

.skyder-boks label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 6px;
    font-size: 0.93rem;
    color: #c8ced6;
}

.skyder-boks label b { font-size: 1.05rem; color: #ffffff; }

input[type="range"] { width: 100%; accent-color: var(--blaa); cursor: pointer; }

.skyder-fod { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.lambda { font-size: 0.92rem; font-weight: 700; color: var(--tekst-svag); }

.lilleknap {
    padding: 5px 12px;
    border: 1px solid #4a4a58;
    border-radius: 999px;
    background-color: var(--panel-2);
    color: var(--tekst-svag);
    font-family: inherit;
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
}

.lilleknap:hover { color: var(--tekst); background-color: var(--panel-3); }
.lilleknap.til { border-color: var(--blaa); color: #dcefff; background-color: rgba(61, 158, 224, 0.2); }

/* ----- Panelet paa fane 2: trinene og maaletabellen -------------------------------- */
.tjekliste { margin: 8px 0 0; padding: 0; list-style: none; counter-reset: tj; }

.tjekliste li {
    counter-increment: tj;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 5px 0;
    font-size: 0.93rem;
    color: #c8ced6;
}

.tjekliste li::before {
    content: counter(tj);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 21px;
    height: 21px;
    border-radius: 50%;
    background-color: var(--panel-3);
    font-size: 0.76rem;
    font-weight: 700;
}

.tjekliste li.ok { color: #b8f0cf; }
.tjekliste li.ok::before { content: "✓"; background-color: var(--groen-mork); color: #ffffff; }

.maaletabel { width: 100%; border-collapse: collapse; font-size: 0.93rem; }

.maaletabel th {
    padding: 3px 8px;
    border-bottom: 1px solid #3a3a47;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-align: right;
    color: var(--tekst-mat);
}

.maaletabel td {
    padding: 4px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.maaletabel th:first-child, .maaletabel td:first-child { text-align: left; }
.maaletabel tr.nu td { background-color: rgba(61, 158, 224, 0.16); }
.maaletabel tr.proeve td { color: #ffe28a; font-weight: 700; }

/* ---------------------------------------------------------------------
   FANE 3: regnestykket paa tavlen
   --------------------------------------------------------------------- */
#regn-arbejde { font-size: var(--fs); overflow: hidden; }
#regn-arbejde .tavle { flex: 0 0 auto; }

.ot-raekke {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: 4px 20px;
    max-width: 100%;
    font-size: calc(var(--fs) * 0.66);
    font-weight: 600;
    color: #dfe8e3;
}

.ot-etiket {
    font-size: max(12.5px, calc(var(--fs) * 0.36));
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #8fa39a;
}

.ot-tal { white-space: nowrap; }

.regn-trin { width: 100%; display: flex; flex-direction: column; gap: calc(var(--fs) * 0.25); }

.rb { padding: calc(var(--fs) * 0.18) calc(var(--fs) * 0.4); border-radius: 10px; }
.rb.aktiv { background-color: rgba(255, 255, 255, 0.03); box-shadow: inset 0 0 0 2px rgba(242, 197, 61, 0.35); }

.rb-hoved {
    margin-bottom: 4px;
    font-size: max(13px, calc(var(--fs) * 0.46));
    font-weight: 700;
    letter-spacing: 0.03em;
    color: #9fb1a9;
}

.rb-linje {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0 0.3em;
    font-size: max(15px, calc(var(--fs) * 0.64));
    font-weight: 600;
    color: #dfe8e3;
}

.rb-linje b { color: #8ff0b4; }
.rb.laast .rb-linje { color: rgba(233, 238, 233, 0.45); }

.trinbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 7px;
    margin: 0 0 calc(var(--fs) * 0.25);
    padding: 0;
    list-style: none;
    font-size: max(13px, calc(var(--fs) * 0.46));
}

.tb-trin { display: inline-flex; align-items: center; gap: 5px; font-weight: 700; color: rgba(233, 238, 233, 0.5); }

.tb-nr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5em;
    height: 1.5em;
    border: 2px solid currentColor;
    border-radius: 50%;
    font-size: 0.85em;
}

.tb-trin.nu { color: var(--gul); }
.tb-trin.ok { color: #8ff0b4; }
.tb-trin.ok .tb-nr { border-color: var(--groen-mork); background-color: var(--groen-mork); color: #ffffff; }
.tb-pil { color: rgba(233, 238, 233, 0.35); }

.regnestykke {
    display: grid;
    grid-template-columns: auto auto minmax(0, 1fr);
    align-items: center;
    gap: calc(var(--fs) * 0.28) calc(var(--fs) * 0.3);
    font-size: calc(var(--fs) * 0.95);
    font-weight: 700;
}

.rs-v { text-align: right; white-space: nowrap; }
.rs-h { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4em; min-width: 0; }
.rs-vist { white-space: nowrap; }
.rs-maerke { font-size: 0.7em; color: #8ff0b4; }
.rs-maerke.svar { color: var(--gul); }
.rs-felter { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5em; }

@keyframes vaelg-puls { 0%, 100% { border-color: rgba(242, 197, 61, 0.35); } 50% { border-color: rgba(242, 197, 61, 0.9); } }

.rs-vaelg {
    padding: 0.2em 0.6em;
    border: 2px dashed rgba(242, 197, 61, 0.6);
    border-radius: 8px;
    font-size: max(15px, calc(var(--fs) * 0.56));
    font-weight: 600;
    color: #f7e4ab;
    animation: vaelg-puls 1.8s ease-in-out infinite;
}

.bf-krop { display: inline-flex; align-items: center; gap: 0.25em; }
.bf-broek { display: inline-flex; flex-direction: column; align-items: stretch; }
.bf-top { display: flex; align-items: center; justify-content: center; gap: 0.25em; padding: 2px 4px; }
.bf-streg { height: 3px; margin: 3px 0; border-radius: 2px; background-color: #e9eee9; }
.bf-gange { padding: 0 0.05em; }
.bf-del { display: inline-flex; }
.bf-del.ok .bf-tekst { padding: 0 0.2em; font-size: 0.8em; color: #8ff0b4; white-space: nowrap; }

.bf-in, .rs-in {
    padding: 0.05em 0.25em;
    border: 2px dashed rgba(233, 238, 233, 0.5);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.07);
    color: #ffffff;
    font-family: inherit;
    font-weight: 700;
    text-align: center;
}

.bf-in.bogstav { width: 1.9em; font-size: 1em; }
.bf-in.tal { width: 8.6em; font-size: 0.68em; padding: 0.2em 0.3em; }
.rs-in { width: 8.4em; font-size: 0.8em; padding: 0.15em 0.3em; }
.bf-in::placeholder, .rs-in::placeholder { color: rgba(233, 238, 233, 0.4); font-weight: 600; }
.bf-in:focus, .rs-in:focus { outline: none; border-style: solid; border-color: var(--blaa); background-color: rgba(61, 158, 224, 0.14); }
.bf-in.fejl, .rs-in.fejl { border-color: var(--roed); background-color: rgba(224, 84, 70, 0.16); animation: ryst 0.35s ease 1; }
.rs-enhed { font-size: 0.75em; color: #cfd9d4; white-space: nowrap; }

#regn-tavle .tjekknap { font-size: max(15px, calc(var(--fs) * 0.55)); padding: 0.35em 0.9em; }

/* Bakken under tavlen: formens form, bogstaverne og tallene */
.bk-gruppe.lys { border-radius: 10px; outline: 2px solid var(--gul); outline-offset: 5px; }
.bk-note { margin: 0; font-size: 0.98rem; color: #c8ced6; }
.brik.skabelon { min-width: 2.6em; background-color: #2e2840; border-color: #5b4b86; color: #e6dcff; }
.brik.skabelon:hover { border-color: var(--lilla); }
.brik.skabelon.valgt { border-color: var(--gul); background-color: rgba(242, 197, 61, 0.16); color: #fff2cc; }
.brik.skabelon { font-size: max(18px, calc(var(--fs) * 0.7)) !important; padding: 0.15em 0.45em; }
.brik.skabelon .vbroek { line-height: 1.05; }
.brik.bogstav { min-width: 2.2em; background-color: #22323d; border-color: #3f6f88; color: #e8f4fb; cursor: pointer; }
.brik.bogstav:hover { border-color: var(--blaa); }
.brik.talbrik { background-color: #3a3220; border-color: #7a6425; color: #fff2cc; cursor: pointer; }
.brik.talbrik:hover { border-color: var(--gul); }
.tb-b { color: var(--gul); }
#regn-bakke .brik { font-size: max(17px, calc(var(--fs) * 0.62)); }

/* Forklaringen i panelet paa fane 3 */
.forklaring p.fk-linje { margin: 0 0 6px; font-size: 0.95rem; line-height: 1.7; }
.fk-linje b { color: #b8f0cf; }
/* ---------------------------------------------------------------------
   TILGAENGELIGHED OG SMALLE SKAERME
   --------------------------------------------------------------------- */
button:focus-visible {
    outline: 2px solid var(--gul);
    outline-offset: 2px;
}

@media (max-width: 1320px) {
    :root { --panel-bredde: 370px; }
}

@media (max-width: 1100px) {
    .top { gap: 10px; padding: 8px 12px; }
    .faneknap { padding: 7px 10px; font-size: 0.82rem; gap: 6px; }
    .faneknap .nr { width: 17px; height: 17px; font-size: 0.65rem; }
    .statuslinje .knap { min-width: 160px; padding: 11px 14px; }
}

@media (max-width: 860px) {
    body { overflow: auto; }
    .top { flex-wrap: wrap; gap: 10px; }
    .faneknapper { order: 3; width: 100%; flex: none; }
    main { overflow: visible; }
    .fane { position: static; grid-template-columns: minmax(0, 1fr); }
    .fane.aktiv { display: grid; }
    .scene { height: 78vh; min-height: 520px; }
    .panel { border-left: none; border-top: 1px solid #1f1f27; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}