/* Leitor — carvão / âmbar */

:root {
  --papel: #0c0c0e;
  --papel-2: #141416;
  --elevado: #1c1c1f;
  --tinta: #f4f1ea;
  --tinta-suave: #a39e94;
  --acento: #e8a23c;
  --acento-forte: #f2bc5a;
  --acento-tinta: #1c1408;
  --acento-fundo: rgba(232, 162, 60, 0.16);
  --salvia: #c9842f;
  --salvia-forte: #e8a23c;
  --petroleo: #f4f1ea;
  --petroleo-claro: #e8a23c;
  --ambar: #e08a3c;
  --ambar-fundo: rgba(224, 138, 60, 0.18);
  --linha: rgba(244, 241, 234, 0.12);
  --sombra: 0 18px 40px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --fonte-ui: "Sora", sans-serif;
  --fonte-display: "Fraunces", serif;
  --fonte-zh: "Noto Sans SC", "Sora", sans-serif;
  --max: 42rem;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--fonte-ui);
  color: var(--tinta);
  background:
    radial-gradient(880px 420px at 100% -8%, rgba(232, 162, 60, 0.07), transparent 58%),
    var(--papel);
  line-height: 1.55;
}

.atmosfera {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(244, 241, 234, 0.02) 2px,
      rgba(244, 241, 234, 0.02) 3px
    );
  z-index: 0;
}

.pagina-home,
.pagina-ler {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-size: 0.9em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* —— Home —— */
.topo {
  position: relative;
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.topo-inicio {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
}

.btn-abrir-importar {
  width: 1.85rem;
  height: 1.85rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--linha);
  background: transparent;
  color: var(--acento);
  font: inherit;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.btn-abrir-importar[aria-expanded="true"] {
  background: var(--acento);
  color: var(--acento-tinta);
  border-color: transparent;
}

.painel-importar {
  position: absolute;
  z-index: 8;
  top: calc(100% + 0.45rem);
  left: 1.25rem;
  width: min(18rem, calc(100vw - 2.5rem));
  padding: 0.85rem;
  border-radius: 0.9rem;
  background: var(--elevado);
  border: 1px solid var(--linha);
  box-shadow: var(--sombra);
}

.painel-importar[hidden] {
  display: none;
}

.marca,
.marca-mini {
  font-family: var(--fonte-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.marca {
  font-size: clamp(1.7rem, 4vw, 2.15rem);
  color: var(--tinta);
}

.topo-fim {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.topo-sub {
  margin: 0;
  color: var(--tinta-suave);
  font-size: 0.85rem;
}

.btn-conta {
  font-family: var(--fonte-ui);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--tinta-suave);
  background: transparent;
  border: 1px solid var(--linha);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  cursor: pointer;
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-conta[hidden] {
  display: none;
}

.conteudo {
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 7rem;
}

.continuar {
  padding: 0.35rem 0 0.25rem;
}

.continuar-card {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 17.5rem;
  border-radius: 1.35rem;
  overflow: hidden;
  padding: 1.35rem 4.6rem 1.45rem 1.35rem;
  color: #f7f4ee;
  isolation: isolate;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.continuar-card:hover .continuar-play {
  background: var(--acento-forte);
}

.continuar-fundo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.continuar-velo {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(8, 8, 10, 0.05) 0%, rgba(8, 8, 10, 0.28) 42%, rgba(8, 8, 10, 0.88) 100%);
}

.continuar-corpo {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}

.continuar-corpo h1 {
  margin: 0;
  font-family: var(--fonte-display);
  font-size: clamp(1.85rem, 4.5vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #f7f4ee;
}

.continuar-kicker {
  justify-self: start;
  margin: 0;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.continuar-meta {
  color: rgba(247, 244, 238, 0.82);
  font-size: 0.92rem;
}

.continuar-play {
  position: absolute;
  right: 1.15rem;
  bottom: 1.35rem;
  width: 3.05rem;
  height: 3.05rem;
  border-radius: 50%;
  background: var(--acento);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.28);
}

.continuar-play::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 0.42rem 0 0.42rem 0.7rem;
  border-color: transparent transparent transparent var(--acento-tinta);
}

.continuar-barra {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0.28rem;
  background: rgba(255, 255, 255, 0.16);
}

.continuar-barra > span {
  display: block;
  height: 100%;
  background: var(--acento);
}

.continuar-vazio {
  cursor: default;
}

.revisita-linha {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
}

.revisita-linha a {
  color: var(--acento-forte);
}

.capa-tom-0 { background: linear-gradient(165deg, #4a321c 0%, #16120e 72%); }
.capa-tom-1 { background: linear-gradient(160deg, #3a2c22 0%, #12100e 70%); }
.capa-tom-2 { background: linear-gradient(170deg, #5a3a1c 0%, #18140f 74%); }
.capa-tom-3 { background: linear-gradient(155deg, #2e2a24 0%, #10100e 68%); }
.capa-tom-4 { background: linear-gradient(165deg, #3d2818 0%, #14110e 70%); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primario {
  background: var(--acento);
  color: var(--acento-tinta);
}

.btn-primario:hover {
  background: var(--acento-forte);
}

.btn-fantasma {
  background: transparent;
  border-color: var(--linha);
  color: var(--tinta);
}

.btn-disabled {
  opacity: 0.4;
  pointer-events: none;
}

.btn-icone {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  border: 1px solid var(--linha);
  background: transparent;
  color: var(--acento);
  font-size: 1.1rem;
  cursor: pointer;
}

.secao {
  margin-top: 2.75rem;
}

.secao h2 {
  font-family: var(--fonte-display);
  font-size: 1.45rem;
  margin: 0 0 1rem;
  color: var(--tinta);
}

.secao-apoio {
  margin: -0.4rem 0 1.2rem;
  color: var(--tinta-suave);
}

.vazio {
  color: var(--tinta-suave);
}

.lista-continuar {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.item-continuar {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--linha);
}

.item-continuar-meta {
  display: grid;
  gap: 0.2rem;
}

.item-continuar-meta span {
  color: var(--tinta-suave);
  font-size: 0.88rem;
}

.barra-progresso {
  height: 0.35rem;
  background: var(--linha);
  border-radius: 999px;
  overflow: hidden;
}

.barra-progresso > span {
  display: block;
  height: 100%;
  background: var(--acento);
  border-radius: inherit;
}

.prateleira {
  margin-bottom: 1.75rem;
}

.prateleira-tema {
  margin: 0 0 0.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tinta-suave);
}

.grade-capas {
  list-style: none;
  margin: 0;
  padding: 0 0 0.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(7.4rem, 1fr));
  gap: 1.15rem 0.85rem;
}

.livro-item {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}

.livro-capa {
  display: block;
  min-width: 0;
}

.livro-rodape {
  display: flex;
  align-items: flex-start;
  gap: 0.15rem;
  min-width: 0;
}

.livro-rodape .livro-titulo {
  flex: 1;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.livro-rodape .livro-titulo:hover {
  color: var(--acento-forte);
}

.btn-livro-menu {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  margin: -0.2rem -0.35rem 0 0;
  padding: 0;
  border: none;
  border-radius: 999px;
  font-size: 1.15rem;
  line-height: 1;
  color: var(--tinta-suave);
  background: transparent;
  cursor: pointer;
}

.btn-livro-menu:hover,
.btn-livro-menu[aria-expanded="true"] {
  color: var(--tinta);
  background: rgba(255, 255, 255, 0.06);
}

.livro-menu-wrap {
  position: relative;
  flex-shrink: 0;
}

.livro-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.15rem);
  z-index: 20;
  min-width: 11rem;
  padding: 0.35rem;
  border-radius: 0.65rem;
  border: 1px solid var(--linha);
  background: var(--papel-elevado, var(--papel));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.livro-menu-acao {
  display: block;
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: none;
  border-radius: 0.45rem;
  font: inherit;
  font-size: 0.82rem;
  text-align: left;
  color: var(--tinta);
  background: transparent;
  cursor: pointer;
}

.livro-menu-remover:hover,
.livro-menu-remover:focus-visible {
  color: #ffb4a8;
  background: rgba(200, 72, 56, 0.15);
}

.capa {
  position: relative;
  display: block;
  aspect-ratio: 2 / 3;
  border-radius: 0.85rem;
  overflow: hidden;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.capa img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.capa-letra {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--fonte-display);
  font-size: 2.6rem;
  color: var(--acento-forte);
}

.capa-progresso {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0.22rem;
  background: rgba(0, 0, 0, 0.35);
}

.capa-progresso > span {
  display: block;
  height: 100%;
  background: var(--acento);
}

.livro-capa:hover .capa {
  transform: translateY(-3px);
  box-shadow: 0 16px 28px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(232, 162, 60, 0.55);
}

.livro-titulo {
  font-family: var(--fonte-zh);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.livro-autor,
.livro-rendimento {
  font-size: 0.75rem;
  color: var(--tinta-suave);
}

.form-importar {
  display: grid;
  gap: 0.7rem;
}

.form-importar label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--tinta-suave);
}

.form-importar label.label-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  color: var(--tinta);
}

.form-importar label.label-check input {
  width: auto;
  margin-top: 0.2rem;
}

.form-importar input,
.form-importar textarea,
.form-importar select {
  width: 100%;
  border: 1px solid var(--linha);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  color: var(--tinta);
  background: var(--papel);
}

.form-importar input[type="file"] {
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
}

.painel-importar .btn {
  width: 100%;
}

.alerta {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: var(--acento-fundo);
  color: var(--tinta);
}

.alerta-erro {
  background: var(--ambar-fundo);
  color: var(--ambar);
}

/* —— Navegação inferior —— */
.nav-base {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem calc(0.5rem + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--papel) 88%, transparent);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--linha);
}

.nav-item {
  flex: 0 1 9rem;
  display: grid;
  justify-items: center;
  gap: 0.15rem;
  padding: 0.35rem 0.5rem;
  border-radius: 0.8rem;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--tinta-suave);
  transition: color 0.18s ease, background 0.18s ease;
}

.nav-item:hover {
  color: var(--tinta);
}

.nav-item.ativo {
  color: var(--acento);
}

.nav-icone {
  position: relative;
  display: block;
  width: 1.45rem;
  height: 1.45rem;
}

.nav-icone svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-selo {
  position: absolute;
  top: -0.3rem;
  left: calc(100% - 0.45rem);
  min-width: 1.05rem;
  height: 1.05rem;
  padding: 0 0.28rem;
  border-radius: 999px;
  background: var(--acento);
  color: var(--acento-tinta);
  font-size: 0.62rem;
  font-weight: 600;
  line-height: 1.05rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* —— Flashcards —— */
.pagina-flashcards {
  position: relative;
  z-index: 1;
}

.estudo {
  width: min(100%, 34rem);
  margin: 0 auto;
  padding: 1.25rem 1.25rem 7rem;
  display: grid;
  gap: 1.1rem;
}

.estudo-barra {
  height: 0.22rem;
  border-radius: 999px;
  background: var(--linha);
  overflow: hidden;
}

.estudo-barra > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--acento);
  transition: width 0.3s ease;
}

.flashcard {
  display: grid;
  align-content: center;
  min-height: min(26rem, 58vh);
  padding: 2rem 1.5rem;
  border-radius: 1.35rem;
  background: var(--papel-2);
  border: 1px solid var(--linha);
  box-shadow: var(--sombra);
  text-align: center;
  cursor: pointer;
}

.flashcard.revelado {
  cursor: default;
}

.flashcard[hidden],
.flashcard-verso[hidden],
.estudo-acoes[hidden],
.estudo-vazio[hidden] {
  display: none;
}

.flashcard-frente,
.flashcard-verso {
  display: grid;
  justify-items: center;
  gap: 0.9rem;
}

.flashcard-verso {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--linha);
  animation: verso-entra 0.22s ease;
}

@keyframes verso-entra {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

.flashcard-frase {
  margin: 0;
  font-family: "Sora", "Noto Sans SC", sans-serif;
  font-size: 1.2rem;
  line-height: 1.75;
}

.flashcard-frase mark {
  background: var(--acento-fundo);
  color: var(--acento-forte);
  border-radius: 0.25rem;
  padding: 0 0.15rem;
}

.tipo-palavra .flashcard-verso .flashcard-frase {
  font-size: 1.02rem;
  color: var(--tinta-suave);
}

.flashcard-hanzi {
  margin: 0;
  font-family: var(--fonte-zh);
  font-size: clamp(3rem, 14vw, 4.5rem);
  font-weight: 500;
  line-height: 1.1;
}

.flashcard-linha {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.flashcard-hanzi-resposta {
  font-family: var(--fonte-zh);
  font-size: 2.2rem;
  font-weight: 500;
  line-height: 1.1;
  color: var(--acento-forte);
}

.flashcard-significado {
  display: grid;
  gap: 0.2rem;
}

.flashcard-pinyin {
  margin: 0;
  color: var(--salvia-forte);
  font-size: 0.95rem;
}

.flashcard-en {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 500;
}

.estudo-acoes {
  display: grid;
}

.estudo-nota {
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.estudo-acoes .btn {
  padding: 0.85rem 1.2rem;
}

.btn-errei {
  background: var(--ambar-fundo);
  color: var(--ambar);
}

.btn-errei:hover {
  background: color-mix(in srgb, var(--ambar) 26%, transparent);
}

.estudo .btn:disabled {
  opacity: 0.55;
  cursor: default;
}

.estudo-vazio {
  padding: 4rem 1rem;
  text-align: center;
}

.estudo-vazio-titulo {
  margin: 0 0 0.4rem;
  font-family: var(--fonte-display);
  font-size: 1.45rem;
}

.estudo-vazio-texto {
  margin: 0;
  color: var(--tinta-suave);
}

/* —— Leitor —— */
.pagina-ler {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--papel);
}

.ler-topo {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--linha);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--papel) 90%, transparent);
  backdrop-filter: blur(8px);
  z-index: 5;
}

.voltar {
  font-size: 1.25rem;
  color: var(--tinta-suave);
}

.ler-topo-centro {
  min-width: 0;
  text-align: center;
}

.marca-mini {
  margin: 0;
  font-size: 0.78rem;
  color: var(--salvia-forte);
}

.ler-titulo {
  margin: 0;
  font-family: var(--fonte-zh);
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ler-topo-acoes {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nivel-ancora {
  position: relative;
}

.painel-nivel {
  position: absolute;
  z-index: 12;
  top: calc(100% + 0.45rem);
  right: 0;
  width: min(16.5rem, calc(100vw - 1.5rem));
  padding: 0.75rem;
  border-radius: 0.9rem;
  background: var(--elevado);
  border: 1px solid var(--linha);
  box-shadow: var(--sombra);
}

.painel-nivel[hidden] {
  display: none;
}

#btn-nivel[aria-expanded="true"] {
  color: var(--acento-tinta);
  background: var(--acento);
  border-color: transparent;
}

.btn-pinyin {
  font-family: var(--fonte-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--tinta-suave);
  background: transparent;
  border: 1px solid var(--linha);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
}

.btn-pinyin[aria-pressed="true"] {
  color: var(--acento-forte);
  background: var(--acento-fundo);
  border-color: color-mix(in srgb, var(--acento) 45%, var(--linha));
}

.selo-modo {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--acento);
  border: 1px solid var(--linha);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
}

.ler-palco {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 1rem 1.15rem 0.85rem;
}

.chip-revisita {
  display: inline-block;
  margin: 0 0 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--salvia-forte);
}

.texto-diglot {
  font-family: var(--fonte-zh);
  font-size: clamp(1.15rem, 2.8vw, 1.35rem);
  line-height: 2.45;
  letter-spacing: 0.01em;
  color: var(--tinta);
}

html.sem-pinyin .texto-diglot {
  line-height: 1.95;
}

.texto-diglot.modo-suporte {
  font-family: var(--fonte-ui);
  line-height: 2.35;
}

html.sem-pinyin .texto-diglot.modo-suporte {
  line-height: 1.8;
}

.texto-diglot p {
  margin: 0 0 0.9em;
}

.texto-diglot p:last-child {
  margin-bottom: 0;
}

.ler-controle {
  margin-top: 1.5rem;
}

.seletor-novas {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  color: var(--tinta-suave);
}

.niveis-impl {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.niveis-impl .btn {
  flex: 1 1 0;
  min-width: 0;
  justify-content: center;
  padding: 0.5rem 0.4rem;
  line-height: 1.2;
}

.nivel-impl-status {
  min-height: 1.1em;
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--tinta-suave);
}

.ler-meta {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--tinta-suave);
}

/* Slots */
.slot {
  cursor: pointer;
  border-radius: 0.2em;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.slot:focus-visible {
  outline: 2px solid var(--petroleo-claro);
  outline-offset: 2px;
}

.slot.status-nova,
.slot.pontilhado {
  border-bottom: 2px dotted var(--salvia-forte);
  padding-bottom: 0.05em;
}

.slot.status-teste,
.slot.linha-fina {
  border-bottom: 1.5px solid var(--acento);
  padding-bottom: 0.05em;
}

.slot.status-fixa,
.slot.sem-linha {
  border-bottom: none;
  cursor: pointer;
  opacity: 0.92;
}

.slot.status-erro,
.slot.cor-ambar {
  background: var(--ambar-fundo);
  border-bottom: 2px solid var(--ambar);
  color: inherit;
}

.slot.status-acerto {
  background: var(--acento-fundo);
  border-bottom-color: var(--acento);
}

.texto-diglot .slot-zh {
  font-family: var(--fonte-zh);
  font-weight: 500;
  color: var(--acento-forte);
  background: transparent;
  padding: 0;
}

.texto-diglot .slot-zh.com-pinyin {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  vertical-align: bottom;
  line-height: 1.05;
  margin: 0 0.08em;
  padding: 0.08em 0.22em 0.12em;
}

.slot-hanzi {
  line-height: 1.2;
}

.slot-pinyin {
  font-family: var(--fonte-ui);
  font-size: 0.62em;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: 0;
  color: var(--salvia-forte);
  white-space: nowrap;
}

html.sem-pinyin .slot-pinyin {
  display: none;
}

html.sem-pinyin .slot-zh.com-pinyin {
  vertical-align: baseline;
  padding: 0 0.12em;
}

.texto-diglot .slot-zh.sem-pinyin-palavra .slot-pinyin {
  display: none;
}

.texto-diglot .slot-zh.com-pinyin.sem-pinyin-palavra {
  display: inline;
  flex-direction: row;
  vertical-align: baseline;
  line-height: inherit;
  margin: 0;
  padding: 0 0.12em;
}

.slot-en {
  font-family: var(--fonte-ui);
  font-weight: 500;
  color: var(--acento-forte);
}

.apoio-en {
  font-family: var(--fonte-ui);
  color: var(--tinta-suave);
}

.ler-nav {
  position: sticky;
  bottom: 0;
  padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--papel) 92%, transparent);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--linha);
  z-index: 5;
}

.btn-nav {
  padding: 0.55rem 0.9rem;
  font-size: 0.85rem;
}

.ler-progresso {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--tinta-suave);
}

/* —— Gaveta —— */
.gaveta-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 0.28s ease;
  z-index: 20;
}

.gaveta-backdrop.aberto {
  opacity: 1;
}

.gaveta {
  position: fixed;
  z-index: 30;
  left: 50%;
  top: 50%;
  width: min(32rem, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  overflow: auto;
  margin: 0;
  padding: 1.15rem 1.15rem 1rem;
  border-radius: 1.1rem;
  background: var(--papel);
  box-shadow: var(--sombra);
  border: 1px solid var(--linha);
  transform: translate(-50%, -46%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.gaveta.aberta {
  transform: translate(-50%, -50%);
  opacity: 1;
  pointer-events: auto;
}

.gaveta-handle {
  display: none;
}

.gaveta-cabecalho {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.gaveta-cabecalho-acoes {
  display: flex;
  gap: 0.45rem;
  flex-shrink: 0;
}

.btn-flashcard {
  display: grid;
  place-items: center;
  padding: 0;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-flashcard svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-flashcard .icone-ok,
.btn-flashcard[aria-pressed="true"] .icone-mais {
  display: none;
}

.btn-flashcard[aria-pressed="true"] .icone-ok {
  display: block;
}

.btn-flashcard[aria-pressed="true"] {
  background: var(--acento);
  border-color: transparent;
  color: var(--acento-tinta);
  cursor: default;
}

.btn-flashcard:disabled {
  opacity: 0.55;
}

.gaveta-pinyin {
  margin: 0;
  color: var(--salvia-forte);
  font-size: 0.9rem;
}

.gaveta-termo {
  margin: 0.15rem 0 0;
  font-family: var(--fonte-zh);
  font-size: 1.7rem;
  line-height: 1.2;
}

.gaveta-feedback {
  margin: 0 0 0.75rem;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  font-size: 0.9rem;
}

.gaveta-feedback.ok {
  background: var(--acento-fundo);
}

.gaveta-feedback.erro {
  background: var(--ambar-fundo);
}

.gaveta-ajuda {
  margin: 0.15rem 0 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--linha);
  display: grid;
  gap: 0.9rem;
}

.gaveta-ajuda[hidden] {
  display: none;
}

.gaveta-ajuda h3 {
  margin: 0 0 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tinta-suave);
}

.ajuda-leitura + .ajuda-leitura {
  margin-top: 0.65rem;
}

.ajuda-pinyin {
  margin: 0 0 0.2rem;
  color: var(--salvia-forte);
  font-size: 0.85rem;
}

.ajuda-sentidos {
  margin: 0;
  padding-left: 1.1rem;
}

.ajuda-sentidos li + li {
  margin-top: 0.15rem;
}

.ajuda-exemplo + .ajuda-exemplo {
  margin-top: 0.7rem;
}

.ajuda-zh {
  margin: 0;
  font-family: var(--fonte-zh);
  font-size: 1.02rem;
  line-height: 1.45;
}

.ajuda-zh mark {
  background: var(--acento-fundo);
  color: var(--acento-forte);
  border-radius: 0.2rem;
  padding: 0 0.12rem;
}

.ajuda-en {
  margin: 0.15rem 0 0;
  color: var(--tinta-suave);
  font-size: 0.92rem;
}

.ajuda-vazio {
  margin: 0;
  color: var(--tinta-suave);
  font-size: 0.9rem;
}

.ajuda-fonte {
  margin: 0.55rem 0 0;
  font-size: 0.72rem;
  color: var(--tinta-suave);
}

.gaveta-form input {
  width: 100%;
  border: 1px solid var(--linha);
  border-radius: 10px;
  padding: 0.8rem 0.9rem;
  font: inherit;
  background: var(--elevado);
  color: var(--tinta);
  margin-bottom: 0.75rem;
}

.gaveta-acoes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.gaveta-fechar {
  display: block;
  width: 100%;
  margin-top: 0.85rem;
  border: none;
  background: transparent;
  color: var(--tinta-suave);
  font: inherit;
  cursor: pointer;
  padding: 0.4rem;
}

@media (min-width: 720px) {
  .continuar-card {
    min-height: 22rem;
    padding-left: 1.6rem;
  }

  .ler-palco {
    padding-top: 1.15rem;
  }
}