:root {
  color-scheme: light dark;
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #5c5b55;
  --border: #c9c7bd;
  --accent: #14532d;
  --accent-text: #ffffff;
  --highlight: #ffe16b;
  --highlight-text: #1c1c1a;
  --word-bg: #14532d;
  --word-text: #ffffff;
  --error-bg: #fde8e4;
  --error-text: #8a1c0c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181816;
    --surface: #242421;
    --text: #f1f0ea;
    --muted: #b5b3a9;
    --border: #4c4b45;
    --accent: #7ee2a0;
    --accent-text: #0e2a18;
    --error-bg: #47201a;
    --error-text: #ffc9bf;
  }
}

* { box-sizing: border-box; }

/* Mantém a frase destacada fora da área coberta pelos controles. */
html { scroll-padding-bottom: 240px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.5 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}

[hidden] { display: none !important; }

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 8px 16px;
  max-width: 48rem;
  margin: 0 auto;
  padding: 16px;
}

.tools { display: flex; flex: 1; flex-wrap: wrap; align-items: center; gap: 8px 16px; }

h1 { margin: 0; font-size: 1.5rem; line-height: 44px; }

.mode {
  display: inline-flex;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.mode input { position: absolute; opacity: 0; }

.mode span {
  display: block;
  padding: 8px 12px;
  background: var(--surface);
  cursor: pointer;
}

.mode input:checked + span { background: var(--accent); color: var(--accent-text); font-weight: 600; }
.mode input:focus-visible + span { outline: 3px solid var(--text); outline-offset: -3px; }

.privacy { flex-basis: 100%; margin: 0; color: var(--muted); font-size: 0.85rem; line-height: 1.4; }

.error {
  max-width: 48rem;
  margin: 0 auto 16px;
  padding: 12px 16px;
  background: var(--error-bg);
  color: var(--error-text);
}

.view { max-width: 48rem; margin: 0 auto; padding: 0 16px 16px; }
#reader-view { padding-bottom: 0; }

.prompt { display: block; margin-bottom: 8px; font-size: 1.25rem; font-weight: 600; }

textarea, input:not([type="radio"], [type="file"]) {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

textarea { resize: vertical; min-height: 12rem; }
input:not([type="radio"], [type="file"]) { min-height: 44px; }

.input-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.hint { color: var(--muted); font-size: 0.9rem; }

button, .button {
  display: inline-block;
  touch-action: manipulation;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover, .button:hover { border-color: var(--text); }
button:disabled { opacity: 0.55; cursor: not-allowed; }
button:focus-visible, .button:focus-within, select:focus-visible, textarea:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button.strong { border: 2px solid var(--accent); }
button.small { min-height: 40px; padding: 6px 12px; }

.text {
  --font-scale: 1;
  padding-bottom: 16px;
  font-size: calc(1.2rem * var(--font-scale));
  line-height: 1.75;
}

.text p { margin: 0 0 1em; }

.sentence { padding: 2px 1px; border-radius: 4px; cursor: pointer; }
.sentence:hover { text-decoration: underline; }
.sentence.current { background: var(--highlight); color: var(--highlight-text); box-decoration-break: clone; -webkit-box-decoration-break: clone; }

/* Palavra falada agora: bloco escuro dentro da frase amarela. As já lidas ficam mais discretas. */
.w { border-radius: 4px; }
.w.done { opacity: 0.7; }
.w.now { margin: 0 -3px; padding: 0 3px; background: var(--word-bg); color: var(--word-text); opacity: 1; }

.banner {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
}

.banner span { flex: 1 1 14rem; }

.dock {
  position: sticky;
  bottom: 0;
  margin: 0 -16px;
  padding: 8px 16px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.status { min-height: 1.5em; margin: 0 0 8px; color: var(--muted); font-size: 0.9rem; }

.transport {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1.4fr 1fr;
  gap: 8px;
}

.transport button { min-height: 56px; padding: 8px 4px; }

.ai-bar { display: flex; gap: 8px; margin-top: 8px; }
.ai-bar button { flex: 1; }
#ai-note { margin: 4px 0 0; font-size: 0.85rem; }
#ai-note:empty { display: none; }

.settings {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 8px 12px;
  margin-top: 10px;
}

.settings label, .fields label { display: grid; gap: 2px; color: var(--muted); font-size: 0.85rem; }

select {
  min-height: 40px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

#new-text { margin-left: auto; min-height: 40px; padding: 6px 12px; }

.shortcuts { margin: 8px 0 0; color: var(--muted); font-size: 0.8rem; }

body.dragging { outline: 4px dashed var(--accent); outline-offset: -8px; }

.card {
  max-width: 24rem;
  margin: 16px auto;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}

.stack { display: grid; gap: 12px; }
.stack label { display: grid; gap: 4px; font-weight: 600; }
.stack label .hint { font-weight: 400; }
.stack h2, .stack h3, .stack p { margin: 0; }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.fields { display: flex; flex-wrap: wrap; gap: 10px 14px; }
.fields label { font-weight: 600; color: var(--text); }
.models { display: grid; gap: 10px; margin: 0; padding: 0; border: 0; }
.models legend { padding: 0; font-weight: 600; }
.models-list { display: grid; gap: 8px; }
.stack .option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  font-weight: 400;
  cursor: pointer;
}
.stack .option:has(input:checked) { border: 2px solid var(--accent); padding: 9px 11px; }
.option input { flex: none; width: 1.25rem; height: 1.25rem; margin-top: 2px; accent-color: var(--accent); }
.option em { color: var(--muted); font-style: normal; font-weight: 400; }
.option small { display: block; margin-top: 2px; color: var(--muted); font-size: 0.85rem; }
.message { min-height: 1.5em; }
.message.bad { color: var(--error-text); }
.note { margin: 0 0 12px; padding: 8px 12px; border-left: 4px solid var(--accent); }
.note:empty { display: none; }
code { padding: 1px 4px; border-radius: 4px; background: var(--bg); }

dialog {
  width: min(36rem, calc(100% - 32px));
  max-height: calc(100% - 32px);
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
}

dialog::backdrop { background: rgb(0 0 0 / 0.55); }
dialog > h2 { margin: 0 0 12px; }
dialog section { margin: 0 0 16px; padding-top: 12px; border-top: 1px solid var(--border); }
dialog a { color: var(--accent); }

@media (hover: none) { .shortcuts { display: none; } }


@media (min-width: 900px) {
  .top, .error, .view { max-width: 56rem; }
  .top { padding: 24px 16px 16px; }
  .tools { justify-content: flex-end; }
  h1 { font-size: 1.75rem; }
  textarea { min-height: 45vh; }
  .text { padding-top: 8px; font-size: calc(1.3rem * var(--font-scale)); }
  .dock {
    margin: 0 auto 16px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    box-shadow: 0 -4px 18px rgb(0 0 0 / 0.18);
  }
  .dock .status { margin-bottom: 8px; }
  .transport button, .ai-bar button { font-size: 1rem; }
}

/* Celular: cabeçalho em grade e dock compacto (mais espaço para o texto). */
@media (max-width: 480px) {
  .top { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px 12px; padding: 12px 16px 8px; }
  .tools { display: contents; }
  .top h1 { grid-column: 1; grid-row: 1; }
  #open-settings { grid-column: 2; grid-row: 1; }
  .mode { grid-column: 1 / -1; grid-row: 2; display: flex; }
  .mode label { flex: 1; }
  .mode span { text-align: center; padding: 10px 8px; }
  .privacy { grid-column: 1 / -1; grid-row: 3; font-size: 0.8rem; }

  .text { font-size: calc(1.15rem * var(--font-scale)); line-height: 1.7; }

  .dock { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; padding-top: 6px; }
  .dock > * { grid-column: 1 / -1; }
  .status { margin: 0; }
  .transport, .ai-bar { display: contents; }
  .transport button, .ai-bar button { grid-column: span 2; min-height: 48px; padding: 6px 4px; font-size: 0.9rem; }
  #previous { order: 1; } #toggle { order: 2; } #next { order: 3; }
  #repeat { order: 4; } #summarize { order: 5; } #explain { order: 6; }
  #toggle { min-height: 52px; font-size: 1rem; }
  #ai-note { order: 7; margin: 0; }
  .settings { order: 8; margin-top: 2px; gap: 8px; flex-wrap: nowrap; }
  .settings label { flex: 1; min-width: 0; }
  .settings select { width: 100%; }
  #new-text { margin-left: 0; flex: none; }
  .shortcuts { display: none; }

  /* Durante a leitura o aviso de privacidade some: o texto ganha a tela. */
  body:has(#reader-view:not([hidden])) .privacy { display: none; }

  /* Tela inicial: ação principal em largura total, as outras duas lado a lado. */
  .input-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .input-actions #paste { grid-column: 1 / -1; min-height: 52px; }
  .input-actions .button { text-align: center; }
}