/* =============================================================
   Banco ENEM — Design "Caderno de prova"
   - Chão de papel quente, cartões brancos com filete e sombra leve.
   - Uma cor por área do conhecimento (data-area em <html> e nas
     abas): Natureza verde, Matemática azul, Humanas terracota,
     Linguagens amarelo. O acento da tela segue a área.
   - Títulos e enunciado em serifa (Source Serif 4), como a prova
     impressa; interface em Inter.
   - Alternativas como bolhas de cartão-resposta.
   ============================================================= */

/* Fontes servidas pelo próprio site (Google Fonts mandava o IP do aluno ao Google). */
@font-face {
  font-family: "Inter";
  font-weight: 400 700;
  font-display: swap;
  src: url("fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-weight: 400 700;
  font-display: swap;
  src: url("fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Source Serif 4";
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/source-serif-4-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/source-serif-4-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  color-scheme: light dark;

  --f-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --f-serif: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman",
    serif;
  --f-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* Papel */
  --bg: #f4f1ea;
  --card: #fffdf9;
  --sunk: #ebe6da;
  --bar-bg: rgb(244 241 234 / 0.86);

  /* Tinta */
  --ink: #1d1b16;
  --ink-2: #5d584e;
  --ink-3: #8a8478;
  --line: #e2dccf;
  --line-2: #d3cbbb;

  /* Acento: muda por área */
  --acc: #2852c8;
  --on-acc: #ffffff;

  /* Estado */
  --ok: #16834f;
  --ok-bg: rgb(22 131 79 / 0.12);
  --bad: #c4362b;
  --bad-bg: rgb(196 54 43 / 0.11);
  --nil-bg: rgb(93 88 78 / 0.12);

  --shadow: 0 1px 2px rgb(60 45 15 / 0.05), 0 10px 28px -16px rgb(60 45 15 / 0.28);
  --shadow-up: 0 2px 4px rgb(60 45 15 / 0.06), 0 18px 36px -18px rgb(60 45 15 / 0.38);

  --s-xs: 8px;
  --s-sm: 16px;
  --s-md: 24px;
  --s-lg: 32px;
  --s-xl: 48px;
  --s-2xl: 80px;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-pill: 999px;

  --veu: #000000;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

[data-area="CN"] { --acc: #13795b; }
[data-area="MT"] { --acc: #2852c8; }
[data-area="CH"] { --acc: #b4531a; }
[data-area="LC"] { --acc: #f2bf1d; --on-acc: #1d1b16; }

/* Derivados do acento: redeclarados onde a área muda (abas) */
:root,
[data-area] {
  --acc-soft: color-mix(in srgb, var(--acc) 11%, transparent);
  --acc-line: color-mix(in srgb, var(--acc) 40%, transparent);
  --acc-ink: var(--acc);
}

/* Amarelo é claro demais para texto no papel: tinta mais escura */
[data-area="LC"] { --acc-ink: #8a6500; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12110e;
    --card: #1c1a16;
    --sunk: #26231e;
    --bar-bg: rgb(18 17 14 / 0.86);

    --ink: #f2eee5;
    --ink-2: #b2ab9d;
    --ink-3: #8c8577;
    --line: #2f2b25;
    --line-2: #3d3830;

    --on-acc: #12110e;

    --ok: #4cc98a;
    --ok-bg: rgb(76 201 138 / 0.15);
    --bad: #ff7b6e;
    --bad-bg: rgb(255 123 110 / 0.14);
    --nil-bg: rgb(178 171 157 / 0.14);

    --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 10px 28px -16px rgb(0 0 0 / 0.7);
    --shadow-up: 0 2px 4px rgb(0 0 0 / 0.4), 0 18px 36px -18px rgb(0 0 0 / 0.8);
  }
  :root { --acc: #7aa0ff; }
  [data-area="CN"] { --acc: #3fcf95; }
  [data-area="MT"] { --acc: #7aa0ff; }
  [data-area="CH"] { --acc: #f5934f; }
  [data-area="LC"] { --acc: #ffd23f; --acc-ink: #ffd23f; --on-acc: #12110e; }
}

/* ============================ Base ============================ */

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.55 var(--f-sans);
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
    env(safe-area-inset-bottom) env(safe-area-inset-left);
  touch-action: manipulation;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}

h1 {
  font-family: var(--f-serif);
  font-size: clamp(2.25rem, 5.2vw, 3.5rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--f-serif);
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.0625rem;
  font-weight: 650;
  line-height: 1.3;
}

p {
  margin: 0;
}

button,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
}

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

img {
  max-width: 100%;
}

/* ========================= Acessibilidade ===================== */

.skip {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip:focus {
  position: fixed;
  top: var(--s-xs);
  left: var(--s-xs);
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip-path: none;
  padding: 12px 24px;
  background: var(--acc);
  color: var(--on-acc);
  border-radius: var(--r-pill);
  z-index: 20;
}

#app:focus {
  outline: none;
}

/* ============================ Layout ========================== */

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: var(--s-sm) var(--s-sm) var(--s-2xl);
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-sm);
  padding: var(--s-xs) 0 var(--s-lg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* Selo: quadrado na cor da área com um "E" de três barras */
.brand::before {
  content: "";
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background:
    linear-gradient(var(--on-acc) 0 0) 9px 8px / 12px 3px no-repeat,
    linear-gradient(var(--on-acc) 0 0) 9px 13.5px / 9px 3px no-repeat,
    linear-gradient(var(--on-acc) 0 0) 9px 19px / 12px 3px no-repeat,
    linear-gradient(var(--on-acc) 0 0) 9px 8px / 3px 14px no-repeat,
    var(--acc);
}

.meta,
.eyebrow {
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0;
}

.eyebrow {
  color: var(--acc-ink);
  font-weight: 600;
}

.hero {
  padding: var(--s-md) 0 var(--s-lg);
}

.kicker {
  display: inline-block;
  margin-bottom: var(--s-sm);
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: var(--acc-soft);
  color: var(--acc-ink);
  font-size: 0.8125rem;
  font-weight: 600;
}

.lead {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 60ch;
  margin: var(--s-sm) 0 var(--s-lg);
}

.hero .lead {
  margin-bottom: 0;
}

.note {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 65ch;
}

.note + h2 {
  margin-top: var(--s-lg);
}

.nav.spaced {
  margin-top: var(--s-lg);
}

footer {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--ink-3);
  max-width: 65ch;
  margin-top: var(--s-xl);
  padding-top: var(--s-md);
  border-top: 1px dashed var(--line-2);
}

/* ================== Áreas (cartões de escolha) ================ */

.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: var(--s-md);
}

.tab {
  position: relative;
  display: grid;
  align-content: end;
  min-height: 132px;
  padding: 58px var(--s-sm) var(--s-sm);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--card);
  box-shadow: var(--shadow);
  text-align: left;
  font-family: var(--f-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink);
  transition: transform 200ms var(--ease-out);
}

/* Sigla da área no canto */
.tab::before {
  content: attr(data-sigla);
  position: absolute;
  top: var(--s-sm);
  left: var(--s-sm);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--acc-soft);
  color: var(--acc-ink);
  font: 700 0.8125rem/1 var(--f-sans);
  letter-spacing: 0.02em;
}

/* Contagem de questões */
.tab::after {
  content: attr(data-n);
  margin-top: 4px;
  font: 500 0.8125rem/1.3 var(--f-sans);
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.tab[aria-selected="true"] {
  background: var(--acc);
  border-color: var(--acc);
  color: var(--on-acc);
  box-shadow: var(--shadow-up);
}

.tab[aria-selected="true"]::before {
  background: color-mix(in srgb, var(--on-acc) 22%, transparent);
  color: var(--on-acc);
}

.tab[aria-selected="true"]::after {
  color: color-mix(in srgb, var(--on-acc) 82%, transparent);
}

@media (hover: hover) and (pointer: fine) {
  .tab:hover {
    transform: translateY(-2px);
  }
}

@media (max-width: 720px) {
  .tabs {
    grid-template-columns: repeat(2, 1fr);
  }
  .tab {
    min-height: 116px;
    font-size: 1.0625rem;
  }
}

/* ========================== Painéis =========================== */

.panel {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  padding: var(--s-lg) var(--s-md) var(--s-md);
  display: grid;
  gap: var(--s-md);
  overflow: hidden;
}

/* Faixa superior na cor da área */
.panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: var(--acc);
}

.panel > .note:first-of-type {
  margin-top: calc(var(--s-md) * -1 + 6px);
}

@media (min-width: 720px) {
  .panel {
    padding: var(--s-xl) var(--s-xl) var(--s-lg);
  }
}

/* ========================= Controles ========================== */

label.f {
  display: grid;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-2);
  position: relative;
}

.f input[type="file"] {
  font: inherit;
  font-size: 0.8125rem;
  color: var(--ink-2);
  max-width: 100%;
}

select {
  appearance: none;
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  padding: 12px 40px 12px 14px;
  background: var(--card);
  color: var(--ink);
  font-size: 0.9375rem;
  font-weight: 500;
  min-height: 48px;
  width: 100%;
}

label.f:has(select)::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: 21px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--ink-2);
  border-bottom: 2px solid var(--ink-2);
  transform: rotate(45deg);
  pointer-events: none;
  transition: transform 160ms var(--ease-out);
}

/* Lista de opções no estilo do app (select customizável). Navegador sem
   suporte mantém a lista nativa do sistema. */
@supports (appearance: base-select) {
  select,
  ::picker(select) {
    appearance: base-select;
  }

  select::picker-icon {
    display: none;
  }

  label.f:has(select:open)::after {
    transform: translateY(4px) rotate(-135deg);
  }

  ::picker(select) {
    margin-block: 6px;
    padding: 6px;
    border: 1px solid var(--line-2);
    border-radius: var(--r-md);
    background: var(--card);
    color: var(--ink);
    box-shadow: var(--shadow-up);
    max-height: min(60vh, 420px);
    overflow-y: auto;
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
    transform-origin: top center;
    transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out),
      overlay 180ms allow-discrete, display 180ms allow-discrete;
  }

  ::picker(select):popover-open {
    opacity: 1;
    transform: none;
  }

  @starting-style {
    ::picker(select):popover-open {
      opacity: 0;
      transform: translateY(-6px) scale(0.98);
    }
  }

  option {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 44px;
    padding: 10px 12px;
    border-radius: var(--r-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--ink);
    cursor: pointer;
  }

  option + option {
    margin-top: 2px;
  }

  option::checkmark {
    order: 1;
    margin-inline-start: auto;
    color: var(--acc-ink);
    font-weight: 700;
  }

  option:hover,
  option:focus-visible {
    background: var(--sunk);
    outline: none;
  }

  option:checked {
    background: var(--acc-soft);
    color: var(--acc-ink);
    font-weight: 600;
  }

  option:active {
    transform: scale(0.97);
  }
}

@media (prefers-reduced-motion: reduce) {
  ::picker(select) {
    transform: none;
  }
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-xs);
}

/* Modos: trilho de papel afundado com a opção ativa em cartão */
.chips:has(.mode) {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  gap: 4px;
  padding: 4px;
  border-radius: var(--r-pill);
  background: var(--sunk);
}

#nl,
#ql {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: var(--s-xs);
}

.chip {
  border: 1px solid var(--line-2);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--r-pill);
  padding: 0 var(--s-md);
  min-width: 64px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  transition: transform 160ms var(--ease-out);
}

.chip[aria-pressed="true"] {
  background: var(--acc);
  border-color: var(--acc);
  color: var(--on-acc);
}

.chip.mode {
  border-color: transparent;
  background: transparent;
  color: var(--ink-2);
  padding: 0 18px;
}

.chip.mode[aria-pressed="true"] {
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.12);
}

/* ========================= Botões ============================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-xs);
  border: 1px solid var(--line-2);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--r-pill);
  padding: 0 22px;
  min-height: 44px;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  transition: transform 160ms var(--ease-out), opacity 200ms var(--ease-out);
}

.btn.primary {
  background: var(--acc);
  border-color: var(--acc);
  color: var(--on-acc);
  min-height: 50px;
  padding: 0 28px;
  font-size: 1rem;
  box-shadow: 0 8px 20px -10px var(--acc);
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover:not(:disabled) {
    opacity: 0.88;
  }
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  box-shadow: none;
}

.btn.back {
  border: 0;
  background: transparent;
  padding: 0 4px;
  color: var(--acc-ink);
}

/* ====================== Barra do simulado ===================== */

.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: calc(var(--s-sm) * -1) calc(var(--s-sm) * -1) 0;
  padding: 12px var(--s-sm) 0;
  background: var(--bar-bg);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 10px;
}

.bar-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-sm);
  font-size: 0.9375rem;
  font-weight: 650;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.bar-acts {
  display: flex;
  align-items: center;
  gap: var(--s-xs);
}

.btn.sair {
  padding: 0 16px;
  font-size: 0.875rem;
}

.timer {
  font-family: var(--f-mono);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--acc-ink);
  background: var(--acc-soft);
  padding: 7px 12px;
  border-radius: var(--r-pill);
}

.prog {
  height: 4px;
  background: var(--sunk);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.bar .prog {
  margin: 0 calc(var(--s-sm) * -1);
  border-radius: 0;
}

.prog i {
  display: block;
  height: 100%;
  background: var(--acc);
  transform-origin: left;
  transform: scaleX(var(--v, 0));
  transition: transform 0.4s var(--ease-in-out);
}

/* Barras crescem do zero ao aparecer (--v vem do JS, inline). A do simulado
   fica de fora: redesenha a cada questão e só anima quando a resposta muda. */
@starting-style {
  :not(.bar) > .prog i,
  .row-bar i {
    transform: scaleX(0);
  }
}

/* ========================= Questão ============================ */

/* Folha da prova: cartão branco com o enunciado e as alternativas */
.sheet {
  margin-top: var(--s-md);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  padding: var(--s-md) var(--s-sm);
}

@media (min-width: 720px) {
  .sheet {
    padding: var(--s-lg) var(--s-xl) var(--s-md);
  }
}

.q-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-sm);
  padding-bottom: var(--s-sm);
  margin-bottom: var(--s-md);
  border-bottom: 1px dashed var(--line-2);
}

.q-top .meta {
  color: var(--acc-ink);
  font-weight: 600;
}

.q-year {
  flex: none;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--ink-2);
  background: var(--sunk);
  padding: 7px 10px;
  border-radius: 8px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.q-tags {
  flex: none;
  display: grid;
  justify-items: end;
  gap: 6px;
}

/* Dificuldade: cinco traços, os do nível cheios na cor da área */
.q-nivel {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
  color: var(--ink-2);
  white-space: nowrap;
}

.q-nivel i {
  display: inline-flex;
  gap: 2px;
}

.q-nivel b {
  width: 4px;
  height: 10px;
  border-radius: 2px;
  background: var(--line-2);
}

.q-nivel[data-nivel="1"] b:nth-child(-n + 1),
.q-nivel[data-nivel="2"] b:nth-child(-n + 2),
.q-nivel[data-nivel="3"] b:nth-child(-n + 3),
.q-nivel[data-nivel="4"] b:nth-child(-n + 4),
.q-nivel[data-nivel="5"] b {
  background: var(--acc);
}

.qcard-head .q-nivel {
  margin-left: auto;
}

.enun {
  max-width: 70ch;
  font-family: var(--f-serif);
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--ink);
}

@media (max-width: 560px) {
  .enun {
    font-size: 1.0625rem;
  }
}

.enun p {
  text-wrap: pretty;
  white-space: pre-line;
}

.enun p + p {
  margin-top: var(--s-sm);
}

img.q {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  margin: var(--s-md) 0;
  background: #fff;
}

img.q.alt-img {
  margin: 0;
  max-height: 260px;
  width: auto;
}

/* Figura ainda baixando (foto em js/base.js): bloco afundado pulsando no
   lugar dela, para a página não pular; ao carregar entra com fade. */
img.q:not([data-ok]) {
  width: min(100%, 360px);
  aspect-ratio: 4 / 3;
  background: var(--sunk);
  border-color: transparent;
  animation: pulse 1.4s var(--ease-in-out) infinite;
}

img.q.alt-img:not([data-ok]) {
  width: 160px;
  aspect-ratio: 2 / 1;
}

img.q[data-ok] {
  animation: fade 240ms var(--ease-out);
}

.alt-mix {
  display: grid;
  gap: var(--s-xs);
}

.alts {
  display: grid;
  gap: 10px;
  margin: var(--s-lg) 0 var(--s-sm);
  padding: 0;
  border: 0;
  min-width: 0;
}

/* Alternativa: linha com bolha de cartão-resposta */
.alt {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px var(--s-sm);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.5;
  transition: transform 160ms var(--ease-out);
}

.alt > span:last-child {
  padding-top: 3px;
}

.alt input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.bub {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1.5px solid var(--line-2);
  color: var(--ink-2);
  display: grid;
  place-items: center;
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1;
}

@media (hover: hover) and (pointer: fine) {
  .alt:not(.gab):not(.err):hover {
    border-color: var(--acc-line);
  }
}

.alt:has(input:checked) {
  border-color: var(--acc);
  background: var(--acc-soft);
}

.alt:has(input:checked) .bub {
  background: var(--acc);
  border-color: var(--acc);
  color: var(--on-acc);
}

.alt:has(input:focus-visible) {
  outline: 2px solid var(--acc);
  outline-offset: 2px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-xs);
  flex-wrap: wrap;
  margin-top: var(--s-md);
}

/* Mapa de questões */
.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--s-lg);
  padding: var(--s-sm);
  background: var(--sunk);
  border-radius: var(--r-md);
}

.dot {
  width: 40px;
  height: 40px;
  min-height: 40px;
  border: 1px solid var(--line-2);
  background: var(--card);
  border-radius: 10px;
  color: var(--ink-2);
  font-size: 0.875rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  transition: transform 160ms var(--ease-out);
}

.dot.on {
  background: var(--acc-soft);
  border-color: var(--acc-line);
  color: var(--acc-ink);
}

.dot[aria-current="true"] {
  background: var(--acc);
  border-color: var(--acc);
  color: var(--on-acc);
}

/* ========================= Resultado ========================== */

.res {
  display: grid;
  justify-items: center;
  gap: var(--s-md);
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  padding: var(--s-xl) var(--s-md) var(--s-lg);
}

.res .stats {
  justify-content: center;
}

.res .note {
  margin-inline: auto;
}

.res .nav {
  justify-content: center;
}

/* Anel de acertos com a nota no centro */
@property --p {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

/* Única animação fora de transform/opacity: o arco do anel cresce até a
   nota uma vez, na tela de resultado (evento raro, 220px). */
.ring {
  --p: var(--n, 0);
  transition: --p 0.9s var(--ease-out);
  display: grid;
  place-content: center;
  width: 220px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(closest-side, var(--card) 86%, transparent 87%),
    conic-gradient(var(--acc) calc(var(--p) * 1turn), var(--sunk) 0);
}

@starting-style {
  .ring {
    --p: 0;
  }
}

.score {
  font-family: var(--f-serif);
  font-size: 4rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  margin-top: 4px;
}

.stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: var(--s-sm);
}

.stats > div {
  min-width: 108px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  background: var(--sunk);
  text-align: left;
}

.stats b {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.stats span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-2);
}

/* ================== Conteúdos: matérias e tópicos ============= */

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
}

.item {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  align-content: start;
  gap: 4px;
  text-align: left;
  border: 1px solid var(--line);
  border-left: 4px solid var(--acc);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--r-md);
  padding: 14px 104px 14px var(--s-sm);
  transition: transform 200ms var(--ease-out);
}

.item::after {
  content: "›";
  position: absolute;
  right: 16px;
  top: 50%;
  translate: 0 -50%;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--acc-ink);
}

@media (hover: hover) and (pointer: fine) {
  .item:hover {
    transform: translateY(-2px);
  }
}

.item-name {
  font-size: 1.0625rem;
  font-weight: 650;
  line-height: 1.3;
}

.item-meta {
  font-size: 0.8125rem;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

/* Nota simulada do conjunto (área, matéria, tópico) */
.nota-tag {
  display: grid;
  justify-items: end;
  gap: 2px;
  position: absolute;
  font-variant-numeric: tabular-nums;
}

.nota-tag small {
  font: 600 0.625rem/1 var(--f-sans);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.nota-tag b {
  font: 700 1.25rem/1 var(--f-sans);
  color: var(--acc-ink);
}

.tab .nota-tag {
  top: var(--s-sm);
  right: var(--s-sm);
}

.tab[aria-selected="true"] .nota-tag small,
.tab[aria-selected="true"] .nota-tag b {
  color: var(--on-acc);
}

.item .nota-tag {
  right: 40px;
  top: 50%;
  translate: 0 -50%;
}

.stats .nota-stat {
  background: var(--acc-soft);
}

.stats .nota-stat b {
  color: var(--acc-ink);
}

/* Nota travada no plano grátis: o toque abre o convite do Pro */
.trava {
  cursor: pointer;
}

.trava:active {
  scale: 0.97;
}

.list.topics .item {
  box-shadow: var(--shadow);
}

.top + .eyebrow {
  margin-top: calc(var(--s-md) * -1);
  margin-bottom: var(--s-xs);
}

.learn {
  display: grid;
  gap: var(--s-xs);
  margin-bottom: var(--s-md);
  max-width: 560px;
}

.learn .prog {
  height: 8px;
}

.stats + .learn {
  margin-top: var(--s-xs);
}

.dist {
  display: grid;
  gap: var(--s-sm);
  margin: var(--s-md) 0;
  padding: var(--s-md);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  max-width: 560px;
}

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.row {
  display: grid;
  grid-template-columns: 6.5em 1fr 2.5em;
  align-items: center;
  gap: var(--s-sm);
  font-size: 0.875rem;
  color: var(--ink-2);
}

.row b {
  text-align: right;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.row-bar {
  height: 8px;
  background: var(--sunk);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.row-bar i {
  display: block;
  height: 100%;
  background: var(--acc);
  border-radius: var(--r-pill);
  transform-origin: left;
  transform: scaleX(var(--v, 0));
  transition: transform 0.4s var(--ease-out);
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: var(--s-sm);
  margin: var(--s-lg) 0 var(--s-sm);
}

.filters + .note {
  margin-bottom: var(--s-sm);
}

/* Quantidade do tópico: chips na escala e o botão logo abaixo */
.qtd {
  display: grid;
  justify-items: start;
  gap: var(--s-sm);
}

.qtd #ql {
  margin-bottom: calc(var(--s-sm) * -1 + var(--s-xs));
}

.qtd .note {
  margin: 0;
}

.qlist {
  list-style: none;
  margin: var(--s-md) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.qcard {
  width: 100%;
  display: grid;
  gap: var(--s-xs);
  text-align: left;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--r-md);
  padding: var(--s-sm) 20px;
  transition: transform 200ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .qcard:hover {
    transform: translateY(-2px);
  }
}

.qcard-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-xs);
  flex-wrap: wrap;
}

.qcard-text {
  font-family: var(--f-serif);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
}

/* ========================= Correções ========================== */

.cor {
  display: grid;
  gap: var(--s-sm);
  margin-bottom: var(--s-sm);
  padding: var(--s-md) var(--s-sm);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}

@media (min-width: 720px) {
  .cor {
    padding: var(--s-lg) var(--s-xl);
  }
}

.cor .alts {
  margin: 0;
}

.cor .alt {
  cursor: default;
}

.cor-head {
  display: flex;
  align-items: center;
  gap: var(--s-xs);
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.4;
  padding: 3px 10px;
  border-radius: var(--r-pill);
}

.tag.ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.tag.bad {
  background: var(--bad-bg);
  color: var(--bad);
}

.tag.nil {
  background: var(--nil-bg);
  color: var(--ink-2);
}

.alt.gab {
  border-color: var(--ok);
  background: var(--ok-bg);
}

.alt.gab .bub {
  background: var(--ok);
  border-color: var(--ok);
  color: var(--card);
}

.alt.err {
  border-color: var(--bad);
  background: var(--bad-bg);
}

.alt.err .bub {
  background: var(--bad);
  border-color: var(--bad);
  color: var(--card);
}

.gab-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-2);
}

/* ========================= Diálogo ============================ */

.modal {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--s-md);
  max-width: 340px;
  width: calc(100% - 32px);
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow-up);
  display: grid;
  gap: var(--s-xs);
  text-align: left;
}

.modal h2 {
  font-size: 1.375rem;
}

.modal .note {
  font-size: 0.9375rem;
  max-width: none;
  margin-bottom: var(--s-sm);
}

.modal::backdrop {
  background: rgb(20 15 5 / 0.45);
}

.modal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-xs);
}

.modal-actions .btn {
  padding: 0 12px;
}

/* Quadro de escolha do bloco (Suas respostas): opções em tinta, empilhadas
   numa coluna */
.escolha {
  text-align: center;
}

.escolhas {
  display: grid;
  gap: var(--s-xs);
  padding: var(--s-sm) 0;
  margin-top: var(--s-xs);
}

.escolhas .btn {
  min-height: 52px;
  background: var(--ink);
  border-color: var(--ink);
  color: var(--card);
  font-size: 1.0625rem;
  text-wrap: balance;
}

.escolhas .btn:disabled {
  opacity: 0.35;
}

.escolha .fechar {
  justify-self: center;
  margin-top: var(--s-xs);
  border-color: transparent;
}

/* ========================= Skeleton ============================ */

.skeleton {
  display: grid;
  gap: var(--s-sm);
  margin-top: var(--s-md);
}

.skeleton span {
  display: block;
  height: 1rem;
  border-radius: var(--r-sm);
  background: var(--sunk);
  animation: pulse 1.4s var(--ease-in-out) infinite;
}

/* Forma da tela inicial: título, lead, quatro abas de área e cartões */
.skeleton .sk-h {
  height: 2.75rem;
  width: 62%;
}

.skeleton .sk-l {
  width: 82%;
  animation-delay: 0.12s;
}

.skeleton .sk-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--s-xs);
  height: auto;
  background: none;
  animation: none;
}

.skeleton .sk-tabs i,
.skeleton .sk-c {
  display: block;
  height: 72px;
  border-radius: var(--r-md);
  background: var(--sunk);
  animation: pulse 1.4s var(--ease-in-out) 0.24s infinite;
}

.skeleton .sk-c {
  height: 88px;
  animation-delay: 0.36s;
}

@keyframes pulse {
  50% {
    opacity: 0.45;
  }
}

/* ========================= Estados ============================ */

.in {
  animation: in 0.3s var(--ease-out);
}

@keyframes in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

@keyframes fade {
  from {
    opacity: 0;
  }
}

/* Listas entram em sequência curta (30ms por item, até o 6º). O mapa de
   questões fica de fora: redesenha a cada questão. */
.in :is(.list, .blocos) > * {
  animation: in 0.3s var(--ease-out) backwards;
}

.in :is(.list, .blocos) > :nth-child(2) { animation-delay: 30ms; }
.in :is(.list, .blocos) > :nth-child(3) { animation-delay: 60ms; }
.in :is(.list, .blocos) > :nth-child(4) { animation-delay: 90ms; }
.in :is(.list, .blocos) > :nth-child(5) { animation-delay: 120ms; }
.in :is(.list, .blocos) > :nth-child(n + 6) { animation-delay: 150ms; }

.item,
.tab,
.alt,
.dot,
.qcard,
.chip {
  -webkit-tap-highlight-color: transparent;
}

.item:active,
.tab:active,
.alt:active:not(:disabled),
.dot:active,
.qcard:active,
.chip:active {
  transform: scale(0.97);
}

/* Diálogo: entra em 200ms de 0.95; sai em 150ms para 0.97, mais discreto.
   display/overlay discretos mantêm o diálogo na camada do topo até o fim. */
.modal,
.modal::backdrop {
  transition: opacity 150ms var(--ease-out), transform 150ms var(--ease-out),
    overlay 150ms allow-discrete, display 150ms allow-discrete;
}

.modal:not([open]) {
  display: none;
  opacity: 0;
  transform: scale(0.97);
}

.modal[open],
.modal[open]::backdrop {
  transition-duration: 200ms;
}

.modal:not([open])::backdrop {
  opacity: 0;
}

@starting-style {
  .modal[open] {
    opacity: 0;
    transform: scale(0.95);
  }
  .modal[open]::backdrop {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .in {
    animation: fade 0.2s linear;
  }
  .in :is(.list, .blocos) > * {
    animation: none;
  }
  .ring,
  .prog i,
  .row-bar i {
    transition: none;
  }
  *:active,
  *:hover,
  .modal {
    transform: none !important;
  }
  .skeleton span,
  .skeleton i,
  img.q:not([data-ok]) {
    animation: none;
  }
}

/* Véu da transição entre áreas e abas (swap em js/base.js): grade de
   quadrados pretos que acendem e apagam ao acaso */
.veu {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--lado));
  grid-auto-rows: var(--lado);
  overflow: hidden;
  pointer-events: none;
}

.veu i {
  background: var(--veu);
  opacity: 0;
}

/* ====================== Barra lateral ========================= */

.side {
  display: flex;
  gap: 4px;
}

.side-link {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--ink-2);
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: left;
  transition: transform 160ms var(--ease-out);
}

.side-link svg {
  flex: none;
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.side-link[aria-current="page"] {
  background: var(--acc-soft);
  color: var(--acc-ink);
}

.side-link:active {
  transform: scale(0.97);
}

html[data-exam] .side {
  display: none;
}

/* Computador: coluna fixa à esquerda; o logo sai do topo das telas */
@media (min-width: 900px) {
  .shell {
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    min-height: 100vh;
  }

  html[data-exam] .shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .side {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    flex-direction: column;
    padding: var(--s-md) var(--s-sm);
    border-right: 1px solid var(--line);
  }

  .side .brand {
    padding: 0 12px var(--s-lg);
  }

  .side-link {
    padding: 0 12px;
    min-height: 46px;
  }

  .wrap {
    width: 100%;
    padding-inline: var(--s-lg);
  }

  html:not([data-exam]) #app .top > span.brand {
    display: none;
  }

  html:not([data-exam]) #app .top:empty {
    padding: 0;
  }
}

/* Celular: barra fixa embaixo, com as duas seções lado a lado */
@media (max-width: 899px) {
  .side {
    position: fixed;
    inset: auto 0 0;
    z-index: 6;
    padding: 6px var(--s-sm) calc(6px + env(safe-area-inset-bottom));
    background: var(--bar-bg);
    -webkit-backdrop-filter: saturate(160%) blur(16px);
    backdrop-filter: saturate(160%) blur(16px);
    border-top: 1px solid var(--line);
  }

  .side .brand {
    display: none;
  }

  .side-link {
    flex: 1;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    min-height: 52px;
    font-size: 0.75rem;
    text-align: center;
  }

  html:not([data-exam]) .wrap {
    padding-bottom: calc(var(--s-2xl) + 40px);
  }
}

/* ===================== Suas respostas ========================= */

.blocos {
  list-style: none;
  margin: var(--s-md) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

/* Bloco: nota à esquerda, matéria e tema no meio, acertos à direita.
   A cor vem da área do bloco (data-area). */
.bloco {
  content-visibility: auto;
  contain-intrinsic-size: auto 88px;
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--s-sm);
  text-align: left;
  border: 1px solid var(--line);
  border-left: 5px solid var(--acc);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  padding: 14px 20px 14px var(--s-sm);
  transition: transform 200ms var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .bloco:hover {
    transform: translateY(-2px);
  }
}

.bloco:active {
  transform: scale(0.97);
}

.bloco-nota {
  display: grid;
  place-items: center;
  align-content: center;
  width: 68px;
  height: 68px;
  border-radius: var(--r-md);
  background: var(--acc);
  color: var(--on-acc);
  font-family: var(--f-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.bloco-nota small {
  font: 600 0.625rem/1 var(--f-sans);
  margin-bottom: 4px;
  opacity: 0.85;
}

.bloco-txt {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.bloco-mat {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--acc-ink);
}

.bloco-tema {
  font-family: var(--f-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.25;
}

.bloco-meta {
  font-size: 0.8125rem;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.bloco-placar {
  font-size: 1.375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

@media (max-width: 560px) {
  .bloco {
    gap: 12px;
    padding-right: var(--s-sm);
  }
  .bloco-placar {
    font-size: 1.0625rem;
  }
  .bloco-tema {
    font-size: 1.0625rem;
  }
  .bloco-nota {
    width: 58px;
    height: 58px;
    font-size: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bloco:hover,
  .bloco:active,
  .side-link:active {
    transform: none;
  }
}