/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --paper:        #EFEAE0;
  --paper-dim:    #E4DDCC;
  --card:         #FBF9F4;
  --ink:          #22271F;
  --ink-soft:     #5B5748;
  --border:       #D8CFB8;

  --pt:           #7C3B34;   /* bloco em português */
  --pt-bg:        #F4E6E1;
  --en:           #2C5C56;   /* bloco em inglês */
  --en-bg:        #E4EEEB;

  --tag:          #C1502E;   /* cor de assinatura: etiqueta de bagagem */
  --tag-dark:     #9C3D22;
  --highlight:    #E7B84B;   /* palavra selecionada */
  --highlight-ink:#4A3410;

  --mastered:     #3F7A5C;

  --radius-s:  6px;
  --radius-m:  12px;
  --radius-l:  20px;

  --font-display: "Fraunces", Georgia, serif;
  --font-body:    "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ==========================================================================
   Tela de manutenção (com senha discreta de acesso)
   ========================================================================== */
.site-content.is-locked {
  display: none;
}

.gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: #FFFFFF;
  transition: opacity 0.25s ease;
}
.gate-overlay.is-unlocked {
  opacity: 0;
  pointer-events: none;
}

.gate-box {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.gate-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin: 0 0 10px;
}

.gate-text {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 32px;
}

.gate-access {
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.gate-access-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.gate-access-row {
  display: flex;
  gap: 8px;
}

.gate-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  background: #fff;
  color: var(--ink);
}
.gate-input:focus {
  outline: 2px solid var(--en);
  outline-offset: 1px;
}

.gate-submit {
  background: var(--tag);
  border-color: var(--tag);
  color: #fff;
  white-space: nowrap;
}
.gate-submit:hover { background: var(--tag-dark); }

.gate-error {
  display: none;
  margin: 12px 0 0;
  font-size: 0.82rem;
  color: var(--pt);
}
.gate-error.is-visible { display: block; }

/* ==========================================================================
   Header / footer
   ========================================================================== */
.site-header {
  padding: 18px clamp(16px, 5vw, 48px);
  border-bottom: 1px solid var(--border);
}
.brand {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 600;
}

.site-footer {
  text-align: center;
  padding: 28px 16px 40px;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.story-hero {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(32px, 6vw, 56px) clamp(16px, 5vw, 24px) 12px;
  text-align: center;
}
.story-hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.6rem;
  margin: 0 0 6px;
  letter-spacing: 0.01em;
}
.story-subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  color: var(--ink-soft);
  margin: 0 0 18px;
  font-size: 1.1rem;
}
.story-hint {
  font-size: 0.92rem;
  color: var(--ink-soft);
  max-width: 480px;
  margin: 0 auto;
}

/* ==========================================================================
   Units
   ========================================================================== */
.units-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px clamp(12px, 4vw, 24px) 48px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.unit {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: clamp(16px, 4vw, 28px);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  align-items: start;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.unit.is-mastered {
  border-color: var(--mastered);
}

.unit.is-hidden .unit-body {
  display: none;
}

.unit.is-skipped {
  opacity: 0.55;
}

/* Etiqueta de bagagem: elemento de assinatura, referenciando o objeto da própria história */
.unit-tag {
  width: 60px;
  height: 40px;
  margin-top: 4px;
  background: var(--tag);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 22% 100%, 0 50%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.12);
}
.unit-tag::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.55);
}
.unit-tag-number {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  padding-left: 10px;
}
.unit.is-mastered .unit-tag { background: var(--mastered); }

.unit-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.unit-text-block { min-width: 0; }

.lang-label {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: 6px;
}
.unit-text-pt .lang-label { color: var(--pt); background: var(--pt-bg); }
.unit-text-en .lang-label { color: var(--en); background: var(--en-bg); }

.unit-text {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.6;
}
.unit-text-pt .unit-text { color: var(--ink); }
.unit-text-en .unit-text { color: var(--ink); }

/* Palavras clicáveis do texto em inglês */
.word {
  cursor: pointer;
  border-radius: 4px;
  padding: 0 1px;
  transition: background-color 0.15s ease;
}
.word:hover { background: var(--en-bg); }
.word.is-selected {
  background: var(--highlight);
  color: var(--highlight-ink);
  box-shadow: 0 0 0 1px var(--highlight);
}

/* ==========================================================================
   Controls
   ========================================================================== */
.unit-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.audio-control {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}
.btn:hover { background: var(--paper-dim); }
.btn:active { transform: translateY(1px); }
.btn .icon { display: inline-block; margin-right: 2px; }

.btn-mastered {
  background: var(--mastered);
  border-color: var(--mastered);
  color: #fff;
}
.btn-mastered:hover { background: #356a4f; }
.unit.is-mastered .btn-mastered {
  background: var(--card);
  color: var(--mastered);
  border-color: var(--mastered);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-soft);
}
.btn-ghost:hover { background: var(--paper-dim); }

.speed-control {
  display: flex;
  gap: 4px;
  background: var(--paper-dim);
  padding: 3px;
  border-radius: var(--radius-s);
}
.speed-btn {
  border: none;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 5px 9px;
  border-radius: 5px;
  cursor: pointer;
}
.speed-btn.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.audio-status {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
  font-style: italic;
  flex-basis: 100%;
}

.action-control {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ==========================================================================
   Vocabulary panel
   ========================================================================== */
.vocab-panel {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 28px) 40px;
  border-top: 2px solid var(--border);
}
.vocab-panel h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 24px 0 12px;
}
.vocab-empty {
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.vocab-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.vocab-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 8px 7px 14px;
  font-size: 0.88rem;
}
.vocab-word { font-weight: 700; }
.vocab-sep { color: var(--ink-soft); }
.vocab-translation { color: var(--ink-soft); }
.vocab-speak {
  border: none;
  background: var(--paper-dim);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.vocab-speak:hover { background: var(--highlight); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 560px) {
  .unit {
    grid-template-columns: 1fr;
  }
  .unit-tag {
    width: 52px;
    height: 34px;
  }
}

/* iPad / tablet landscape: manter leitura confortável, sem esticar demais */
@media (min-width: 1100px) {
  .story-hero, .units-container, .vocab-panel { max-width: 800px; }
}