/* =====================================================================
   sc3.1 - Elektron-prikformler
   Stilark. Samme udtryk som de andre superanimationer.
   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;
    --roed-mork:   #a33529;
    --gul:         #f2c53d;
    --lilla:       #9b6bd6;

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

* { box-sizing: border-box; }

[hidden], .skjult { 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;
    user-select: none;
}

/* ---------------------------------------------------------------------
   TOPLINJE
   --------------------------------------------------------------------- */
header.top {
    display: flex;
    align-items: center;
    gap: 18px;
    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 header.top { padding-left: 56px; }

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

.opgave-taeller { font-size: 0.78rem; color: var(--tekst-mat); display: block; margin-bottom: 1px; }

/* Det, der kun hoerer til den ene fane */
body[data-fane="byg"] .kun-fejl,
body[data-fane="fejl"] .kun-byg { display: none !important; }

/* ----- Faneknapper ----------------------------------------------------- */
.faneknapper { display: flex; gap: 6px; flex-shrink: 0; }

.faneknap {
    background-color: var(--panel-3);
    color: var(--tekst-svag);
    border: 1px solid #4a4a58;
    padding: 8px 15px;
    border-radius: var(--radius-lil);
    font-family: inherit;
    font-size: 0.92rem;
    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, border-color 0.18s ease;
}

.faneknap .nr {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--panel-2);
    color: var(--tekst-svag);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.faneknap:hover { background-color: #47475a; border-color: #5e5e70; color: var(--tekst); }
.faneknap.aktiv { background-color: var(--blaa); border-color: var(--blaa); color: #ffffff; }
.faneknap.aktiv .nr { background-color: rgba(255, 255, 255, 0.25); color: #ffffff; }

/* ----- Opgavemenu: én knap pr. molekyle eller tegning ------------------ */
.opgave-menu {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}

.opgave-knap {
    background-color: var(--panel-2);
    color: var(--tekst-svag);
    border: 1px solid transparent;
    border-radius: var(--radius-lil);
    padding: 7px 12px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.opgave-knap:hover { background-color: var(--panel-3); color: var(--tekst); }
.opgave-knap.loest { color: #7ee0a8; border-color: rgba(63, 174, 114, 0.5); }
.opgave-knap.aktiv { background-color: var(--blaa); border-color: var(--blaa); color: #ffffff; }
.opgave-knap.loest.aktiv { background-color: var(--groen-mork); border-color: var(--groen); }

.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); }

/* ---------------------------------------------------------------------
   SCENEN
   --------------------------------------------------------------------- */
main#scene {
    flex: 1;
    position: relative;
    min-height: 0;
    background-color: var(--scene-bund);
    overflow: hidden;
}

#laerred { display: block; width: 100%; height: 100%; touch-action: none; }

/* ----- Stregformel-panelet -------------------------------------------- */
#stregformel-panel {
    position: absolute;
    top: 14px;
    left: 14px;
    width: 240px;
    background-color: rgba(43, 43, 54, 0.92);
    border: 1px solid var(--linje);
    border-radius: var(--radius);
    padding: 8px;
    z-index: 5;
    pointer-events: none;
    box-shadow: var(--skygge);
}

#stregformel-titel {
    font-size: 0.75rem;
    color: var(--tekst-mat);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    text-align: center;
    margin-bottom: 4px;
}

#stregformel-laerred { display: block; width: 224px; height: 180px; }

/* ----- Opsaetnings- og sejrsoverlay ------------------------------------ */
.overlay-boks {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(31, 31, 39, 0.98);
    border: 1px solid var(--linje);
    border-radius: 14px;
    box-shadow: var(--skygge);
    padding: 26px 30px;
    max-width: 800px;
    width: calc(100% - 40px);
    text-align: center;
    z-index: 50;
}

#opsaetning-molekyle { font-size: 1.7rem; font-weight: 700; color: var(--blaa); margin-bottom: 4px; }
#opsaetning-overskrift { font-size: 1.05rem; font-weight: normal; margin: 0 0 4px; line-height: 1.4; }
#opsaetning-overskrift .fremhaev { color: var(--tekst); font-weight: 600; }
.overlay-boks .opsaetning-sp { font-size: 0.9rem; color: var(--tekst-mat); margin: 0 0 14px; }
.opsaetning-navn { font-size: 1rem; color: var(--tekst-mat); font-weight: normal; }

/* Periodisk system, lommeformat */
.pt-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
    max-width: 440px;
    margin: 6px auto 18px;
}

.pt-gruppe-rad {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    max-width: 440px;
    margin: 6px auto 0;
}

.pt-gruppe { font-size: 0.75rem; color: var(--tekst-mat); text-align: center; }

.pt-felt {
    width: 46px;
    height: 50px;
    border: 1px solid #4a4a58;
    border-radius: var(--radius-lil);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--panel-2);
    opacity: 0.45;
    position: relative;
}

.pt-felt.aktiv { opacity: 1; background-color: var(--panel); border-color: #6b6b7a; }
.pt-felt.fremhaevet {
    border: 2px solid var(--blaa);
    background-color: var(--blaa-mork);
    color: #fff;
    transform: scale(1.08);
    z-index: 2;
    opacity: 1;
    box-shadow: 0 0 14px rgba(61, 158, 224, 0.6);
}

.pt-symbol { font-weight: 700; font-size: 1.05rem; }
.pt-nr { font-size: 0.75rem; position: absolute; top: 2px; left: 3px; color: var(--tekst-mat); }
.pt-felt.fremhaevet .pt-nr { color: rgba(255, 255, 255, 0.8); }

.valens-knap {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    border: 2px solid var(--blaa);
    background: transparent;
    color: var(--tekst);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    margin: 4px;
    transition: background-color 0.15s ease;
}

.valens-knap:hover { background-color: var(--blaa); color: #0d1520; }
.valens-knap.forkert { background-color: var(--roed-mork); border-color: var(--roed); }

/* Hintet til et forkert antal valenselektroner */
.overlay-boks .valens-besked { min-height: 1.4em; margin: 8px 0 0; font-size: 0.95rem; color: #f0918a; }

/* Sejrsboksen ligger nederst, saa elevens egen prikformel stadig kan ses. */
.sejr-kort {
    position: absolute;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 20px;
    max-width: calc(100% - 32px);
    background-color: rgba(31, 31, 39, 0.97);
    border: 1px solid var(--groen-mork);
    border-radius: 14px;
    box-shadow: var(--skygge);
    padding: 14px 22px 14px 16px;
    z-index: 50;
}

#sejr-sprite { height: 96px; width: auto; max-width: 240px; min-width: 0; }
.sejr-kort h2 { color: var(--groen); margin: 0 0 4px; font-size: 1.15rem; }
.sejr-kort p { color: var(--tekst-svag); margin: 0 0 12px; font-size: 0.88rem; }

/* ----- Hint ------------------------------------------------------------ */
#hint-boks {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 280px;
    background-color: rgba(43, 43, 54, 0.96);
    border: 1px solid var(--lilla);
    border-radius: var(--radius);
    padding: 10px 12px;
    z-index: 6;
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    box-shadow: var(--skygge);
}

#hint-boks.vis { opacity: 1; transform: translateY(0); pointer-events: auto; }
.hint-hoved { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
#hint-boks-titel { font-size: 0.75rem; color: var(--lilla); text-transform: uppercase; letter-spacing: 0.07em; font-weight: 700; }
#hint-luk {
    background: transparent;
    border: none;
    color: var(--tekst-mat);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0 2px;
}
#hint-luk:hover { color: var(--tekst); }
#hint-tekst { font-size: 0.92rem; line-height: 1.5; color: var(--tekst); margin: 0; }
#hint-sprite { display: block; height: 104px; width: auto; max-width: 100%; margin: 10px auto 2px; }

/* ----- Fejlbesked (toast) ---------------------------------------------- */
#toast {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--roed);
    color: #fff;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.88rem;
    opacity: 0;
    transition: opacity 0.3s ease, bottom 0.3s ease;
    pointer-events: none;
    z-index: 40;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}

#toast.vis { opacity: 1; bottom: 112px; }

/* ---------------------------------------------------------------------
   BUNDLINJE
   --------------------------------------------------------------------- */
footer {
    min-height: 76px;
    background-color: var(--panel);
    border-top: 1px solid #1f1f27;
    display: flex;
    align-items: center;
    padding: 8px 18px;
    flex-shrink: 0;
    z-index: 10;
}

footer .bund {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
}

.vejledning { font-size: 0.82rem; color: var(--tekst-mat); line-height: 1.4; max-width: 640px; margin: 0; }
.vejledning b { color: var(--tekst); }

.knaprad { display: flex; gap: 8px; flex-shrink: 0; }

.knap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background-color: var(--panel-2);
    color: var(--tekst);
    border: 1px solid #4a4a58;
    border-radius: var(--radius-lil);
    padding: 10px 18px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
}

.knap:hover { background-color: var(--panel-3); border-color: #5e5e70; }
.knap:active { transform: scale(0.97); }

.knap.blaa { background-color: var(--blaa-mork); border-color: var(--blaa); }
.knap.blaa:hover { background-color: var(--blaa); }
.knap.groen { background-color: var(--groen-mork); border-color: var(--groen); }
.knap.groen:hover { background-color: var(--groen); }
.knap.lilla { background-color: #5b3f80; border-color: var(--lilla); }
.knap.lilla:hover { background-color: var(--lilla); }

/* Efter tre forkerte tjek i træk minder hjaelpeknappen om sig selv */
@keyframes knap-puf {
    0%   { box-shadow: 0 0 0 0 rgba(155, 107, 214, 0.9); transform: scale(1); }
    40%  { transform: scale(1.08); }
    100% { box-shadow: 0 0 0 16px rgba(155, 107, 214, 0); transform: scale(1); }
}

.knap.puf { animation: knap-puf 0.7s ease-out 3; }

/* ----- Find fejlen: spoergsmaal, svar og knap under scenen -------------- */
.fejl-tekst { flex: 1; min-width: 0; }
.fejl-spm { margin: 0; font-size: 1rem; font-weight: 600; color: var(--tekst); }
.fejl-besked { margin: 3px 0 0; min-height: 1.35em; font-size: 0.9rem; color: var(--tekst-svag); line-height: 1.35; }
.fejl-besked.ok { color: #7ee0a8; }
.fejl-besked.fejl { color: #f0918a; }

.fejl-svar { display: flex; flex-wrap: wrap; gap: 5px; flex-shrink: 0; max-width: 560px; justify-content: flex-end; }

.tal-knap {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 2px solid var(--blaa);
    background: transparent;
    color: var(--tekst);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.tal-knap:hover { background-color: var(--blaa); color: #0d1520; }
.tal-knap.forkert { background-color: var(--roed-mork); border-color: var(--roed); }

#fejl-knap { flex-shrink: 0; min-width: 132px; }

/* ---------------------------------------------------------------------
   KEMICHAEL
   Han tegnes paa sit eget lag oven over scenens vinduer. Laget tager
   ikke imod musen; klik paa ham fanges i app.js.
   --------------------------------------------------------------------- */
#laerer-lag {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 55;
}

.spring-over {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: rgba(20, 20, 28, 0.94);
    color: #ffffff;
    border: 2px solid var(--gul);
    border-radius: 999px;
    padding: 10px 22px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.spring-over[hidden] { display: none; }
.spring-over:hover { background-color: var(--panel-3); }
.spring-over span { color: var(--gul); font-size: 1.1rem; }

/* Foerste klik paa Kemichael: knappen blinker og viser vejen */
@keyframes puf {
    0%   { box-shadow: 0 0 0 0 rgba(242, 197, 61, 0.9); transform: translateX(-50%) scale(1); }
    40%  { transform: translateX(-50%) scale(1.08); }
    100% { box-shadow: 0 0 0 18px rgba(242, 197, 61, 0); transform: translateX(-50%) scale(1); }
}

.spring-over.puf { animation: puf 0.7s ease-out 2; }

/* Det, Kemichael peger paa, mens han taler om det */
@keyframes peg {
    0%   { box-shadow: 0 0 0 0 rgba(242, 197, 61, 0.7); }
    70%  { box-shadow: 0 0 0 12px rgba(242, 197, 61, 0); }
    100% { box-shadow: 0 0 0 0 rgba(242, 197, 61, 0); }
}

.peg { outline: 2px solid var(--gul); outline-offset: 2px; animation: peg 1.2s ease-out infinite; }

/* Mens han praesenterer Byg, bliver vinduet smallere og rykker til
   hoejre, saa hans taleboble ikke daekker det periodiske system. Samme
   tal som i laererPladsPx i js/laerer.js. */
#opsaetning-overlay { transition: left 0.4s ease, width 0.4s ease; }
body.laerer-taler #opsaetning-overlay {
    width: min(620px, calc(100% - 40px));
    left: calc(50% + max(0px, min(150px, (100% - 660px) / 2)));
}

/* ---------------------------------------------------------------------
   RUNDVISNING
   --------------------------------------------------------------------- */
#rundvisning-baggrund { position: fixed; inset: 0; background-color: rgba(0, 0, 0, 0.65); z-index: 200; }

#rundvisning-boble {
    position: fixed;
    z-index: 201;
    background-color: var(--panel);
    border: 1px solid var(--linje);
    border-radius: 10px;
    box-shadow: var(--skygge);
    padding: 16px 20px;
    width: 300px;
    font-size: 0.92rem;
    line-height: 1.45;
    color: var(--tekst);
}

.rundvisning-taeller { font-size: 0.75rem; color: var(--tekst-mat); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; font-weight: 700; }
.rundvisning-tekst { margin-bottom: 14px; }
.rundvisning-nav { display: flex; justify-content: space-between; align-items: center; gap: 8px; }

.rundvisning-knap {
    border: none;
    border-radius: 5px;
    padding: 7px 14px;
    font-weight: 700;
    font-size: 0.84rem;
    cursor: pointer;
    background-color: var(--blaa);
    color: #fff;
}

.rundvisning-knap:hover { filter: brightness(1.1); }
.rundvisning-knap.svag { background-color: var(--panel-3); color: var(--tekst-svag); }
.rundvisning-knap.svag:hover { color: var(--tekst); }

/* ---------------------------------------------------------------------
   TILGAENGELIGHED OG SMALLE SKAERME
   --------------------------------------------------------------------- */
button:focus-visible { outline: 2px solid var(--gul); outline-offset: 2px; }

/* Toplinjen skal kunne staa paa én linje ned til ca. 1000 px, fx naar
   animationen staar i en samlingsside med menuen ved siden af. */
@media (max-width: 1180px) {
    header.top { gap: 12px; padding: 8px 12px; }
    header.top h1 { font-size: 1rem; }
    .faneknap { padding: 7px 11px; gap: 6px; }
    .opgave-menu { gap: 4px; }
    .opgave-knap { padding: 6px 8px; font-size: 0.9rem; }
}

/* Lave skaerme: vinduet med det periodiske system skal kunne vaere der */
@media (max-height: 760px) {
    .overlay-boks { padding: 16px 22px; }
    #opsaetning-molekyle { font-size: 1.4rem; }
    .overlay-boks .opsaetning-sp { margin-bottom: 8px; }
    .pt-grid { gap: 4px; margin: 4px auto 10px; }
    .pt-felt { height: 42px; }
    .valens-knap { width: 38px; height: 38px; margin: 3px; }
    .overlay-boks .valens-besked { margin-top: 4px; }
}

@media (max-width: 900px) {
    header.top { flex-wrap: wrap; height: auto; padding: 8px 12px; }
    .vejledning { display: none; }
    #stregformel-panel { width: 190px; }
    #stregformel-laerred { width: 174px; height: 140px; }
}

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

/* Tilbuddet om Kemichaels praesentation: midt foroven i scenen, samme
   sted som knappen, der springer den over (js/praesentation.js) */
.tilbud {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(20, 20, 28, 0.94);
    border: 1px solid #4a4a58;
    border-radius: 999px;
    padding: 6px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

.tilbud button {
    font-family: inherit;
    font-weight: 700;
    border-radius: 999px;
    cursor: pointer;
    padding: 9px 18px;
    font-size: 0.98rem;
}

.tilbud-start {
    background-color: var(--blaa-mork);
    border: 2px solid var(--gul);
    color: #ffffff;
    animation: bank 1.7s ease-out infinite;
}

.tilbud-start span { color: var(--gul); margin-left: 4px; }
.tilbud-start:hover { background-color: var(--blaa); }

.tilbud-nej {
    background-color: transparent;
    border: 1px solid #5e5e70;
    color: var(--tekst-svag);
}

.tilbud-nej:hover { background-color: var(--panel-3); color: var(--tekst); }

/* Start præsentation banker stille, så den ikke kan overses */
@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); }
}