/* Aukaorð: blár ritstjórablýantur á hvítri örk. Sjá DESIGN.md. */

@font-face {
  font-family: "Source Serif 4";
  src: url("assets/fonts/SourceSerif4Variable-Roman.ttf.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --serif: "Source Serif 4", Charter, "Bitstream Charter", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", Ubuntu, sans-serif;

  --desk: #e8ebef;
  --paper: #ffffff;
  --ink: #161a21;
  --ink-soft: #464e5b;
  --rule: #c2c9d2;
  --rule-strong: #7a8493;
  --pencil: #2245b5;
  --pencil-strong: #1a3690;
  --pencil-wash: #e2e8fa;
  --on-pencil: #ffffff;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  --radius: 4px;
  --measure: 62ch;

  color-scheme: light;
  font: 1rem/1.55 var(--sans);
  color: var(--ink);
  background: var(--desk);
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}

/* Dökka stigið er skilgreint tvisvar: einu sinni fyrir kerfisstillinguna og einu sinni
   fyrir handvalið `data-theme="dark"`. Haldið báðum blokkunum og töflunni í DESIGN.md í takt. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --desk: #121519;
    --paper: #1b1f26;
    --ink: #e7e9ed;
    --ink-soft: #aeb5c0;
    --rule: #333a45;
    --rule-strong: #6d7685;
    --pencil: #9db2ff;
    --pencil-strong: #c3d0ff;
    --pencil-wash: #263156;
    --on-pencil: #0f1424;
  }
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --desk: #121519;
    --paper: #1b1f26;
    --ink: #e7e9ed;
    --ink-soft: #aeb5c0;
    --rule: #333a45;
    --rule-strong: #6d7685;
    --pencil: #9db2ff;
    --pencil-strong: #c3d0ff;
    --pencil-wash: #263156;
    --on-pencil: #0f1424;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
a { color: var(--pencil); text-underline-offset: 0.18em; }
a:hover { color: var(--pencil-strong); }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--pencil);
  outline-offset: 2px;
}

.masthead, main, .colophon {
  width: min(1180px, 100% - 2 * var(--space-5));
  margin-inline: auto;
}

/* Haus */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  padding-block: var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--rule);
}

.brand {
  font: 600 1.75rem/1 var(--serif);
  font-variation-settings: "opsz" 40;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }
.brand-cut {
  color: var(--ink-soft);
  font-weight: 400;
  text-decoration: line-through;
  text-decoration-color: var(--pencil);
  text-decoration-thickness: 0.09em;
}

.masthead-note {
  color: var(--ink-soft);
  font-size: 0.9375rem;
}

/* Inngangur */

.intro {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  align-items: end;
  gap: var(--space-4) var(--space-7);
  padding-block: var(--space-7) var(--space-6);
}

h1 {
  font: 600 clamp(2rem, 1.35rem + 2.4vw, 3rem)/1.1 var(--serif);
  font-variation-settings: "opsz" 60;
  letter-spacing: -0.005em;
}

.intro p {
  max-width: 44ch;
  font-size: 1.0625rem;
  color: var(--ink-soft);
}

/* Vinnusvæði: tvær arkir á borði */

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: stretch;
}

.sheet {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

.sheet-head,
.sheet-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-4) var(--space-5);
}

.sheet-head { border-bottom: 1px solid var(--rule); }

.sheet-head label,
.sheet-head h2 {
  font: 600 1rem/1.3 var(--sans);
}

.sheet-foot {
  margin-top: auto;
  border-top: 1px solid var(--rule);
  min-height: 4.25rem;
  color: var(--ink-soft);
  font-size: 0.9375rem;
}

#count, #badge {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

textarea,
#result,
#preview {
  font: 400 1.1875rem/1.7 var(--serif);
  font-variation-settings: "opsz" 18;
  color: var(--ink);
}

textarea {
  flex: 1;
  width: 100%;
  padding: var(--space-5);
  border: 0;
  background: transparent;
  resize: vertical;
}
textarea:focus-visible { outline: 2px solid var(--pencil); outline-offset: -4px; }
textarea::placeholder { color: var(--ink-soft); }


.check {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: 0.9375rem;
  color: var(--ink-soft);
  cursor: pointer;
}
.check input {
  width: 1.05rem;
  height: 1.05rem;
  margin: 0.2rem 0 0;
  accent-color: var(--pencil);
}

#result {
  padding: var(--space-5);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.empty { color: var(--ink-soft); font: 1rem/1.6 var(--sans); }

/* Merkingar: línustíll ber merkinguna, ekki bara liturinn.
   Tvöföld lína = tvítekning. Punktalína = matsorð. Yfirstrikun = forskoðun á brottfellingu. */

.word,
.mark-sample {
  font: inherit;
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: var(--pencil);
  text-underline-offset: 0.22em;
}

.word {
  padding: 0 1px;
  margin: 0;
  border: 0;
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
}

.word.context,
.mark-sample.context {
  text-decoration-style: double;
  text-decoration-thickness: 1px;
  background: var(--pencil-wash);
}

.word.wordlist,
.mark-sample.wordlist {
  text-decoration-style: dotted;
  text-decoration-thickness: 2px;
}

.word:hover,
.word:focus-visible,
.word.is-selected {
  text-decoration-line: line-through;
  text-decoration-style: solid;
  text-decoration-thickness: 2px;
  background: var(--pencil-wash);
}
.word.is-selected { outline: 1px solid var(--pencil); outline-offset: 1px; }

/* Tillaga: spássíuathugasemd inni í örkinni, afmörkuð með lit, ekki ramma */

#suggestion {
  margin: 0 var(--space-5) var(--space-5);
  padding: var(--space-5);
  background: var(--pencil-wash);
  border-radius: var(--radius);
}

#suggestion h3 {
  font: 600 1.125rem/1.35 var(--sans);
  margin-bottom: var(--space-2);
}
#suggestion h3:focus { outline: none; }
#suggestion h3:focus-visible { outline: 2px solid var(--pencil); }

#reason { max-width: var(--measure); }

.preview-label {
  margin-top: var(--space-5);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-soft);
}

#preview {
  margin-block: var(--space-2) var(--space-5);
  padding: var(--space-4);
  background: var(--paper);
  border-radius: var(--radius);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 1.0625rem;
}

/* Hnappar */

button {
  font: 600 0.9375rem/1.2 var(--sans);
  cursor: pointer;
  border: 0;
  border-radius: var(--radius);
  padding: 0.625rem 1rem;
  background: var(--pencil);
  color: var(--on-pencil);
}
button:hover { background: var(--pencil-strong); }
button:disabled { opacity: 0.45; cursor: default; }
button:disabled:hover { background: var(--pencil); }

button.quiet {
  padding: 0.5rem 0.25rem;
  background: transparent;
  color: var(--pencil);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.2em;
}
button.quiet:hover:not(:disabled) {
  background: transparent;
  text-decoration-color: currentColor;
}
button.quiet:disabled:hover { background: transparent; }

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
}

#status { flex: 1 1 14rem; line-height: 1.5; }

/* Uppbygging: listi aðskilinn með línum, engin spjöld í spjöldum */

.structure {
  margin-top: var(--space-8);
}

.structure-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-bottom: var(--space-3);
}

h2 {
  font: 600 1.625rem/1.2 var(--serif);
  font-variation-settings: "opsz" 32;
}

.lede {
  max-width: var(--measure);
  color: var(--ink-soft);
}

.structure-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-block: var(--space-5) var(--space-3);
}
.structure-controls label { font-weight: 600; }

select {
  font: 1rem/1.3 var(--sans);
  padding: 0.5rem 0.625rem;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  max-width: 100%;
}

#structure-notes { margin-top: var(--space-6); }
#structure-notes > .hint {
  padding-block: var(--space-4);
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
}

.structure-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  justify-items: start;
  gap: var(--space-2);
  padding-block: var(--space-5) var(--space-6);
  border-top: 1px solid var(--rule);
}
.structure-note:last-child { border-bottom: 1px solid var(--rule); }

.structure-note h3 { font: 600 1.1875rem/1.35 var(--sans); }
.structure-note p { max-width: var(--measure); }
.structure-note .exception { color: var(--ink-soft); }
.rule-source { font-size: 0.9375rem; }

.structure-note blockquote {
  justify-self: stretch;
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  padding: var(--space-1) 0 var(--space-1) var(--space-4);
  border-left: 2px solid var(--pencil);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 400 1.0625rem/1.65 var(--serif);
}

/* Meginreglur og nánari upplýsingar */

.principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5) var(--space-7);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 2px solid var(--ink);
  color: var(--ink-soft);
}
.principles p { max-width: 52ch; }
.principles strong { color: var(--ink); }

details {
  margin-top: var(--space-5);
  border-top: 1px solid var(--rule);
  padding-top: var(--space-4);
  color: var(--ink-soft);
}
details + details { margin-top: 0; }
details:last-of-type { padding-bottom: var(--space-4); border-bottom: 1px solid var(--rule); }
details p { max-width: var(--measure); margin-top: var(--space-3); }
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  padding-block: var(--space-1);
}
#words { font-family: var(--serif); color: var(--ink); }

.colophon {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-top: var(--space-7);
  padding-block: var(--space-5) var(--space-6);
  font-size: 0.9375rem;
  color: var(--ink-soft);
}
.colophon > span:first-child { font: 600 1rem/1.5 var(--serif); color: var(--ink); }

/* Minni skjáir */

@media (max-width: 860px) {
  .intro { grid-template-columns: 1fr; padding-block: var(--space-6) var(--space-5); }
  .workspace { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .masthead, main, .colophon { width: calc(100% - 2 * var(--space-4)); }
  .sheet-head, .sheet-foot { padding-inline: var(--space-4); }
  textarea, #result { padding: var(--space-4); font-size: 1.125rem; }
  #suggestion { margin-inline: var(--space-3); padding: var(--space-4); }
  .structure, .principles { margin-top: var(--space-7); }
}

@media (prefers-reduced-motion: no-preference) {
  .word, button, a { transition: background-color 120ms ease-out, text-decoration-color 120ms ease-out; }
}

/* Equal prominence for wording and document-level patterns. */
.masthead, main, .colophon { width: min(1360px, 100% - 2 * var(--space-5)); }
/* Yfirlit: ein textalína, ekki hnappaflipar. Birtist aðeins þegar texti er kominn. */
.overview { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 var(--space-3); margin-bottom: var(--space-3); color: var(--ink-soft); }
.overview-sep { color: var(--rule-strong); }
button.overview-link { padding: var(--space-1) 0; background: transparent; color: var(--ink); font-weight: 500; text-decoration: underline; text-decoration-color: var(--rule-strong); text-underline-offset: 0.25em; }
button.overview-link:hover { background: transparent; text-decoration-color: var(--pencil); }
.workbench { display: grid; grid-template-columns: minmax(0, 2fr) minmax(20rem, 1fr); gap: 1.5rem; align-items: start; }
.workbench .structure { margin-top: 0; padding: 1.5rem; background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); max-height: 80vh; overflow: auto; scrollbar-width: thin; scrollbar-color: var(--rule-strong) transparent; }
.workspace { align-items: start; gap: 1rem; }
/* Textareitir vaxa með textanum upp að hámarki, síðan birtist skrunstika.
   Hámarkið heldur niðurstöðunum innan seilingar þó textinn sé langur. */
textarea, #result {
  flex: none;
  height: auto;
  min-height: 10rem;
  max-height: min(26rem, 45vh);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule-strong) transparent;
}
textarea { field-sizing: content; }
#result:focus-visible { outline: 2px solid var(--pencil); outline-offset: -4px; }
#preview { max-height: 16rem; overflow: auto; }
.rhythm-mark, .rhythm-sample { color: var(--ink); background: color-mix(in srgb, var(--pencil-wash) 55%, var(--paper)); text-decoration: underline wavy var(--pencil); text-underline-offset: .2em; }
.rhythm-mark:hover { background: var(--pencil-wash); color: var(--ink); }
.structure-note:focus { outline: 2px solid var(--pencil); outline-offset: -2px; }
.structure-note { scroll-margin: 1rem; }
@media (max-width: 1200px) {
 .workspace { grid-template-columns: 1fr; }
 .workbench { grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 1fr); }
}
@media (max-width: 860px) {
 .workbench { grid-template-columns: 1fr; }
 .workbench .structure { max-height: none; overflow: visible; }
 #structure-notes { max-height: min(32rem, 60vh); overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--rule-strong) transparent; }
}
@media (max-width: 520px) {
 .masthead, main, .colophon { width: calc(100% - 2rem); }
 .workbench .structure { padding: 1rem; }
}

/* Skýring á merkjum: hvert merki sér, leiðbeining í sér línu. */
.legend { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); margin: 0; padding: 0; list-style: none; }
.legend .mark-sample, .legend .rhythm-sample { margin: 0; color: var(--ink); }

/* Hausar beggja arka jafnháir svo línurnar standist á. */
.sheet-head { min-height: 3.75rem; padding-block: var(--space-2); }

/* Óvirkur aðalhnappur: hlutlaus, ekki dofinn blýantslitur. */
button:not(.quiet):disabled,
button:not(.quiet):disabled:hover { opacity: 1; background: var(--rule); color: var(--ink-soft); }

@media (max-width: 520px) {
  textarea, #result { min-height: 8rem; max-height: 50vh; }
}

/* Skýringarlína fyrir ofan arkirnar: á borðinu, enginn rammi. */
.key {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  margin-bottom: var(--space-4);
  font-size: 0.9375rem;
  color: var(--ink-soft);
}
.key-legend { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2) var(--space-4); }
.key-label { font-weight: 600; color: var(--ink); }

/* Þemastýring í fæti: ljóst, dökkt eða kerfisstillingin. Enginn rammi utan um hópinn —
   valinn kostur ber blýantsflötinn, hinir eru hlutlaus texti. */
.theme { display: flex; align-items: baseline; gap: var(--space-2); }
.theme-label { color: var(--ink-soft); font-size: 0.875rem; }

.segmented { display: flex; gap: var(--space-1); }
.segmented label {
  position: relative;
  padding: 0.25rem 0.5rem;
  font: 500 0.875rem/1.5 var(--sans);
  color: var(--ink-soft);
  border-radius: var(--radius);
  cursor: pointer;
}
.segmented label:hover { color: var(--ink); }
.segmented input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.segmented label:has(input:checked) { background: var(--pencil); color: var(--on-pencil); }
.segmented label:has(input:focus-visible) { outline: 2px solid var(--pencil); outline-offset: 2px; }

@media (max-width: 520px) {
  .theme { width: 100%; }
}