/* Kangoo Design System — componentes 1.0.0 (27/10/2026)
   Depende de tokens.css (importar antes). Todas as classes comecam com `k-`
   para nao colidir com o CSS que ja esta em producao (index.css do app e o
   <style> de cada pagina web). Nada aqui mexe em seletor de elemento global.

   Origem de cada peca: o que o app ja faz (arquivo citado no comentario).
   Padronizar, nao reinventar. */

/* ───────────────────────── Base opcional ─────────────────────────
   Aplique .k-base no <body> de uma pagina NOVA. Telas existentes ja tem o
   reset delas (index.css); nao precisa. */
.k-base {
  margin: 0;
  background: var(--k-bg);
  color: var(--k-text);
  font-family: var(--k-font-base);
  font-size: var(--k-fs-base);
  line-height: var(--k-lh-relaxed);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.k-base *, .k-base *::before, .k-base *::after { box-sizing: border-box; }

/* Foco visivel em tudo que e interativo do sistema (teclado e leitor de tela). */
:where(.k-btn, .k-chip-lang, .k-input, .k-select, .k-textarea, .k-tab, .k-tabbar__item, .k-sidemenu__item, .k-lesson-card, .k-node, .k-row-link):focus-visible {
  outline: 3px solid var(--k-focus);
  outline-offset: 2px;
}

/* ───────────────────────── Tipografia ───────────────────────── */
.k-display { font-size: var(--k-fs-6xl); font-weight: var(--k-fw-black); line-height: var(--k-lh-tight); letter-spacing: var(--k-ls-tight); margin: 0; }
.k-h1 { font-size: var(--k-fs-4xl); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); letter-spacing: var(--k-ls-tight); margin: 0; }
.k-h2 { font-size: var(--k-fs-3xl); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); letter-spacing: var(--k-ls-snug); margin: 0; }
.k-h3 { font-size: var(--k-fs-xl); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); margin: 0; }
.k-body { font-size: var(--k-fs-base); font-weight: var(--k-fw-medium); line-height: var(--k-lh-relaxed); margin: 0; }
.k-small { font-size: var(--k-fs-sm); color: var(--k-text-2); line-height: var(--k-lh-relaxed); margin: 0; }
/* Rotulo em caixa alta: "SECAO 1 · UNIDADE 3", cabecalho de grupo, KPI. */
.k-label {
  font-size: var(--k-fs-xs); font-weight: var(--k-fw-extrabold);
  letter-spacing: var(--k-ls-label); text-transform: uppercase;
  color: var(--k-text-2); margin: 0;
}
.k-num { font-variant-numeric: tabular-nums; }

/* ───────────────────────── Botoes ─────────────────────────
   O 3D e um LABIO: sombra solida sem desfoque, 4 px, no tom escuro da mesma
   cor. No toque o botao desce 4 px e o labio some (= .btn-press do app,
   index.css). So botao CHEIO tem labio — botao de texto (fantasma) nao,
   senao ele "cai e volta" sem ter onde afundar (INTERFACE_29_08.md, item 3). */
.k-btn {
  --k-btn-bg: var(--k-surface);
  --k-btn-fg: var(--k-text);
  --k-btn-lip: var(--k-border);
  --k-btn-border: transparent;
  --k-btn-lip-size: 4px;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--k-space-2);
  min-height: var(--k-touch-comfortable);
  padding: 13px 22px;
  border: 2px solid var(--k-btn-border);
  border-radius: var(--k-radius-xl);
  background: var(--k-btn-bg);
  color: var(--k-btn-fg);
  box-shadow: 0 var(--k-btn-lip-size) 0 var(--k-btn-lip);
  margin-bottom: var(--k-btn-lip-size);
  font-family: inherit;
  font-size: var(--k-fs-md);
  font-weight: var(--k-fw-extrabold);
  line-height: 1.2;
  letter-spacing: var(--k-ls-snug);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--k-dur-press) ease, box-shadow var(--k-dur-press) ease, filter var(--k-dur-fast) ease;
}
.k-btn:hover { filter: brightness(1.04); }
.k-btn:active:not(:disabled):not([aria-disabled="true"]) {
  transform: translateY(var(--k-btn-lip-size));
  box-shadow: 0 0 0 var(--k-btn-lip);
}
.k-btn--primary { --k-btn-bg: var(--k-orange-500); --k-btn-fg: var(--k-on-brand); --k-btn-lip: var(--k-orange-600); }
.k-btn--success { --k-btn-bg: var(--k-success-500); --k-btn-fg: var(--k-success-900); --k-btn-lip: var(--k-success-600); }
.k-btn--danger  { --k-btn-bg: var(--k-error-600); --k-btn-fg: #FFFFFF; --k-btn-lip: var(--k-error-800); }
.k-btn--accent  { --k-btn-bg: var(--k-indigo-500); --k-btn-fg: #FFFFFF; --k-btn-lip: var(--k-indigo-700); }
.k-btn--secondary { --k-btn-bg: var(--k-surface); --k-btn-fg: var(--k-text); --k-btn-border: var(--k-border); --k-btn-lip: var(--k-border); }
.k-btn--ghost {
  --k-btn-bg: transparent; --k-btn-fg: var(--k-link); --k-btn-lip-size: 0px;
  min-height: var(--k-touch-min); padding: 10px 14px; margin-bottom: 0;
  box-shadow: none; font-weight: var(--k-fw-bold);
}
.k-btn--ghost:hover { background: var(--k-hover); filter: none; }
.k-btn--ghost:active:not(:disabled) { transform: scale(0.97); }

.k-btn--sm { min-height: var(--k-touch-min); padding: 9px 16px; font-size: var(--k-fs-sm); border-radius: var(--k-radius-lg); --k-btn-lip-size: 3px; }
.k-btn--lg { min-height: var(--k-touch-primary); padding: 15px 24px; font-size: var(--k-fs-lg); }
.k-btn--block { display: flex; width: 100%; }
.k-btn--caps { text-transform: uppercase; letter-spacing: var(--k-ls-label); font-size: var(--k-fs-sm); }
.k-btn--pill { border-radius: var(--k-radius-pill); }
.k-btn--icon { width: 46px; min-width: 46px; height: 46px; min-height: 46px; padding: 0; }
.k-btn--icon svg { width: 24px; height: 24px; }

.k-btn:disabled, .k-btn[aria-disabled="true"] {
  --k-btn-bg: var(--k-disabled-bg); --k-btn-lip: var(--k-disabled-lip); --k-btn-fg: var(--k-text-2); --k-btn-border: transparent;
  cursor: default; filter: none;
}

/* ───────────────────────── Cartao generico ───────────────────────── */
.k-card {
  background: var(--k-surface);
  border: 2px solid var(--k-border);
  border-radius: var(--k-radius-2xl);
  padding: var(--k-space-5);
}
.k-card--raised { border-color: transparent; box-shadow: var(--k-shadow-card); }
.k-card--warm { background: var(--k-surface-warm); border-color: var(--k-brand-tint); }

/* ───────────────────────── Faixa de unidade (FaixaUnidade.tsx) ─────────────────────────
   A cor e da UNIDADE e cicla de 6 em 6: k-unit-1 … k-unit-6. */
.k-unit-1 { --k-u-bg: var(--k-unit-1-bg); --k-u-lip: var(--k-unit-1-lip); }
.k-unit-2 { --k-u-bg: var(--k-unit-2-bg); --k-u-lip: var(--k-unit-2-lip); }
.k-unit-3 { --k-u-bg: var(--k-unit-3-bg); --k-u-lip: var(--k-unit-3-lip); }
.k-unit-4 { --k-u-bg: var(--k-unit-4-bg); --k-u-lip: var(--k-unit-4-lip); }
.k-unit-5 { --k-u-bg: var(--k-unit-5-bg); --k-u-lip: var(--k-unit-5-lip); }
.k-unit-6 { --k-u-bg: var(--k-unit-6-bg); --k-u-lip: var(--k-unit-6-lip); }
.k-unit-band {
  display: flex; align-items: center; justify-content: space-between; gap: var(--k-space-3);
  padding: 14px 18px;
  border-radius: var(--k-radius-2xl);
  background: var(--k-u-bg, var(--k-unit-1-bg));
  box-shadow: 0 4px 0 var(--k-u-lip, var(--k-unit-1-lip));
  color: var(--k-unit-ink);
}
/* Texto em TINTA sobre a cor da unidade. Branco (o que o app usa hoje) reprova
   em verde, ceu, laranja e turquesa: 2,1 a 2,6:1 — nem texto grande passa. */
.k-unit-band__context { font-size: var(--k-fs-xs); font-weight: var(--k-fw-black); letter-spacing: var(--k-ls-label); text-transform: uppercase; opacity: 0.8; margin: 0; }
.k-unit-band__title { font-size: var(--k-fs-xl); font-weight: var(--k-fw-black); line-height: var(--k-lh-snug); margin: 2px 0 0; }

/* ───────────────────────── Cartao de licao ───────────────────────── */
.k-lesson-card {
  display: flex; align-items: center; gap: var(--k-space-4);
  width: 100%;
  min-height: 84px;
  padding: var(--k-space-4);
  background: var(--k-surface);
  border: 2px solid var(--k-border);
  border-radius: var(--k-radius-2xl);
  box-shadow: 0 4px 0 var(--k-border);
  margin-bottom: 4px;
  color: inherit; font: inherit; text-align: left; cursor: pointer;
  transition: transform var(--k-dur-press) ease, box-shadow var(--k-dur-press) ease;
}
.k-lesson-card:active { transform: translateY(4px); box-shadow: 0 0 0 var(--k-border); }
.k-lesson-card__icon {
  flex: 0 0 56px; width: 56px; height: 56px; border-radius: var(--k-radius-xl);
  display: grid; place-items: center; overflow: hidden;
  background: var(--k-surface-2);
}
.k-lesson-card__icon img { width: 100%; height: 100%; object-fit: cover; }
.k-lesson-card__body { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.k-lesson-card__title { font-size: var(--k-fs-md); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); margin: 0; }
.k-lesson-card__meta { font-size: var(--k-fs-sm); color: var(--k-text-2); margin: 0; }
.k-lesson-card__end { flex: 0 0 auto; display: flex; align-items: center; gap: var(--k-space-2); color: var(--k-text-2); }
.k-lesson-card--current { border-color: var(--k-orange-500); box-shadow: 0 4px 0 var(--k-orange-600); }
.k-lesson-card--current:active { box-shadow: 0 0 0 var(--k-orange-600); }
.k-lesson-card--done .k-lesson-card__end { color: var(--k-success-text); }
.k-lesson-card--locked { cursor: default; }
.k-lesson-card--locked .k-lesson-card__icon { filter: grayscale(1); opacity: 0.55; }
.k-lesson-card--locked .k-lesson-card__title { color: var(--k-text-2); }
.k-lesson-card--locked:active { transform: none; box-shadow: 0 4px 0 var(--k-border); }

/* ───────────────────────── No da trilha (TrilhaScreen.tsx) ───────────────────────── */
.k-node-wrap { position: relative; display: inline-grid; place-items: center; padding-top: 44px; }
.k-node {
  position: relative;
  width: 70px; height: 64px;
  border: none; border-radius: 50%;
  background: var(--k-u-bg, var(--k-orange-500));
  box-shadow: 0 6px 0 var(--k-u-lip, var(--k-orange-600));
  margin-bottom: 6px;
  display: grid; place-items: center;
  color: var(--k-unit-ink); cursor: pointer;
  transition: transform var(--k-dur-press) ease, box-shadow var(--k-dur-press) ease;
}
.k-node svg { width: 30px; height: 30px; }
.k-node:active { transform: translateY(6px); box-shadow: 0 0 0 transparent; }
.k-node--locked { --k-u-bg: var(--k-border); --k-u-lip: var(--k-border-strong); color: var(--k-text-muted); cursor: default; }
.k-node--locked:active { transform: none; box-shadow: 0 6px 0 var(--k-u-lip); }
/* Halo do no atual: diz "e AQUI" (kangoo-pulse do app). */
.k-node--current::before {
  content: ""; position: absolute; inset: -8px; border-radius: 50%;
  border: 4px solid var(--k-u-bg, var(--k-orange-500));
  animation: k-pulse-ring var(--k-dur-loop-pulse) ease-out infinite;
  pointer-events: none;
}

/* Balao "COMECAR" com bico (INTERFACE_29_08.md, item 2). */
.k-balloon {
  position: absolute; top: 0; left: 50%;
  transform: translateX(-50%);
  padding: 8px 14px;
  border-radius: var(--k-radius-lg);
  background: var(--k-surface);
  border: 2px solid var(--k-border);
  color: var(--k-brand-text);
  font-size: var(--k-fs-sm); font-weight: var(--k-fw-black); letter-spacing: var(--k-ls-label); text-transform: uppercase;
  white-space: nowrap;
  animation: k-balao-flutua var(--k-dur-loop-float) ease-in-out infinite;
}
.k-balloon::after {
  content: ""; position: absolute; left: 50%; bottom: -9px;
  width: 14px; height: 14px; transform: translateX(-50%) rotate(45deg);
  background: inherit; border-right: 2px solid var(--k-border); border-bottom: 2px solid var(--k-border);
}

/* ───────────────────────── Barra de progresso ───────────────────────── */
.k-progress {
  --k-value: 0;
  display: block;
  position: relative;
  width: 100%; height: 14px;
  border-radius: var(--k-radius-pill);
  background: var(--k-track);
  overflow: hidden;
}
.k-progress__fill {
  display: block;
  position: relative;
  height: 100%;
  width: calc(var(--k-value) * 1%);
  border-radius: inherit;
  background: var(--k-success-500);
  transition: width var(--k-dur-progress) var(--k-ease-progress);
}
/* Brilho de cima — o reflexo que deixa a barra "cheia de liquido". */
.k-progress__fill::after {
  content: ""; position: absolute; left: 8px; right: 8px; top: 3px; height: 4px;
  border-radius: var(--k-radius-pill); background: rgba(255,255,255,0.35);
}
.k-progress--brand .k-progress__fill { background: var(--k-orange-500); }
.k-progress--accent .k-progress__fill { background: var(--k-indigo-500); }
.k-progress--gold .k-progress__fill { background: var(--k-gold-400); }
.k-progress--sm { height: 8px; }
.k-progress--sm .k-progress__fill::after { display: none; }

/* ───────────────────────── Ofensiva, XP, vidas ───────────────────────── */
.k-stat {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: var(--k-touch-min); padding: 0 8px;
  font-size: var(--k-fs-base); font-weight: var(--k-fw-extrabold);
  font-variant-numeric: tabular-nums;
  color: var(--k-text);
  border-radius: var(--k-radius-lg);
}
.k-stat svg { width: 22px; height: 22px; flex: 0 0 auto; }
.k-stat--streak svg { color: var(--k-streak-on); }
.k-stat--streak-off svg { color: var(--k-streak-off); }
.k-stat--streak-off { color: var(--k-text-2); }
.k-stat--xp svg { color: var(--k-gold-400); }
.k-stat--hearts svg { color: var(--k-heart-on); }

/* Selo de conquista (Conquistas.tsx). Medalha redonda com labio. */
.k-badge {
  display: inline-flex; flex-direction: column; align-items: center; gap: 8px; width: 96px; text-align: center;
}
.k-badge__medal {
  width: 64px; height: 64px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--k-gold-400); color: var(--k-orange-900);
  box-shadow: 0 4px 0 var(--k-gold-600), inset 0 -6px 0 rgba(0,0,0,0.08);
}
.k-badge__medal svg { width: 30px; height: 30px; }
.k-badge__name { font-size: var(--k-fs-xs); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); }
.k-badge--locked .k-badge__medal { background: var(--k-surface-2); color: var(--k-text-muted); box-shadow: 0 4px 0 var(--k-border); }
.k-badge--locked .k-badge__name { color: var(--k-text-2); }

/* Contador (pastilha vermelha) — BarraInferior.tsx / admin .badge-contador. */
.k-count {
  display: inline-block; min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: var(--k-radius-pill);
  background: var(--k-error-600); color: #FFFFFF;
  font-size: 11px; font-weight: var(--k-fw-extrabold); line-height: 18px; text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Pilula de status (admin/business). */
.k-pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: var(--k-radius-pill);
  font-size: var(--k-fs-2xs); font-weight: var(--k-fw-extrabold);
  letter-spacing: 0.03em; text-transform: uppercase;
  background: var(--k-surface-2); color: var(--k-text-2);
}
.k-pill--success { background: rgba(88,204,2,0.18); color: var(--k-success-text); }
.k-pill--warning { background: var(--k-brand-tint); color: var(--k-brand-text); }
.k-pill--error   { background: rgba(220,38,38,0.12); color: var(--k-error-text); }
.k-pill--accent  { background: var(--k-accent-tint); color: var(--k-link); }

/* ───────────────────────── Chip de idioma ─────────────────────────
   Bandeira + nome. Selecionado = borda e fundo indigo (mesmo estado ativo do menu). */
.k-chip-lang {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: var(--k-touch-comfortable);
  padding: 10px 16px;
  border: 2px solid var(--k-border);
  border-radius: var(--k-radius-xl);
  background: var(--k-surface);
  box-shadow: 0 3px 0 var(--k-border);
  margin-bottom: 3px;
  color: var(--k-text); font: inherit; font-weight: var(--k-fw-bold); font-size: var(--k-fs-base);
  cursor: pointer;
  transition: transform var(--k-dur-press) ease, box-shadow var(--k-dur-press) ease;
}
.k-chip-lang:active { transform: translateY(3px); box-shadow: 0 0 0 var(--k-border); }
.k-chip-lang__flag { font-size: 22px; line-height: 1; }
.k-chip-lang__code { font-size: var(--k-fs-2xs); font-weight: var(--k-fw-extrabold); letter-spacing: var(--k-ls-label); text-transform: uppercase; color: var(--k-text-2); }
.k-chip-lang[aria-pressed="true"], .k-chip-lang--selected {
  border-color: var(--k-accent-tint-border);
  background: var(--k-accent-tint);
  box-shadow: 0 3px 0 var(--k-accent-tint-border);
  color: var(--k-link);
}

/* ───────────────────────── Formularios ─────────────────────────
   Fonte do campo SEMPRE >= 16 px: abaixo disso o iOS da zoom sozinho e a
   tela passa a andar de lado (index.css, 10/09/2026). */
.k-field { display: flex; flex-direction: column; gap: 6px; }
.k-field__label { font-size: var(--k-fs-sm); font-weight: var(--k-fw-bold); color: var(--k-text); }
.k-field__help { font-size: var(--k-fs-xs); color: var(--k-text-2); margin: 0; }
.k-input, .k-select, .k-textarea {
  width: 100%;
  min-height: var(--k-touch-comfortable);
  padding: 12px 14px;
  border: 2px solid var(--k-border);
  border-radius: var(--k-radius-lg);
  background: var(--k-surface-2);
  color: var(--k-text);
  font-family: inherit; font-size: 16px; font-weight: var(--k-fw-semibold);
  outline: none;
  transition: border-color var(--k-dur-fast) ease, box-shadow var(--k-dur-fast) ease, background var(--k-dur-fast) ease;
}
.k-input::placeholder, .k-textarea::placeholder { color: var(--k-text-muted); font-weight: var(--k-fw-medium); }
.k-input:focus, .k-select:focus, .k-textarea:focus {
  border-color: var(--k-accent);
  background: var(--k-surface);
  box-shadow: 0 0 0 4px var(--k-accent-tint);
}
.k-textarea { min-height: 96px; resize: vertical; line-height: var(--k-lh-relaxed); }
.k-field--error .k-input, .k-field--error .k-select, .k-field--error .k-textarea { border-color: var(--k-error-500); background: var(--k-error-bg); }
.k-field--error .k-field__help { color: var(--k-error-text); font-weight: var(--k-fw-bold); }

/* ───────────────────────── Rodape de resposta (RodapeLicao.tsx) ───────────────────────── */
.k-answer {
  padding: 16px 16px calc(16px + env(safe-area-inset-bottom));
  background: var(--k-surface);
  border-top: 2px solid var(--k-divider);
}
.k-answer--fixed { position: fixed; left: 0; right: 0; bottom: 0; z-index: var(--k-z-lesson-footer); animation: k-sobe var(--k-dur-slide) var(--k-ease-out); }
.k-answer__inner { max-width: var(--k-layout-content-max); margin: 0 auto; }
.k-answer__msg { display: flex; align-items: flex-start; gap: 10px; margin: 0 0 12px; font-size: var(--k-fs-md); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-normal); }
.k-answer__msg svg { width: 22px; height: 22px; flex: 0 0 auto; margin-top: 1px; }
.k-answer--right { background: var(--k-success-bg); border-top-color: var(--k-success-border); }
.k-answer--right .k-answer__msg { color: var(--k-success-text); }
.k-answer--wrong { background: var(--k-error-bg); border-top-color: var(--k-error-border); }
.k-answer--wrong .k-answer__msg { color: var(--k-error-text); }

/* ───────────────────────── Modal e folha inferior ─────────────────────────
   No celular prefira a FOLHA (bottom sheet): o modal centrado cobre o que a
   pessoa estava lendo (INTERFACE_29_08.md, "O que ficou de fora"). */
.k-overlay {
  position: fixed; inset: 0; z-index: var(--k-z-modal);
  display: grid; place-items: center; padding: var(--k-space-4);
  background: var(--k-overlay);
}
.k-overlay--sheet { place-items: end center; padding: 0; }
.k-modal {
  width: 100%; max-width: 420px;
  padding: var(--k-space-6);
  border-radius: var(--k-radius-4xl);
  background: var(--k-surface);
  color: var(--k-text);
  box-shadow: var(--k-shadow-modal);
  text-align: center;
}
.k-modal__title { font-size: var(--k-fs-2xl); font-weight: var(--k-fw-extrabold); line-height: var(--k-lh-snug); margin: 0 0 8px; }
.k-modal__text { font-size: var(--k-fs-base); color: var(--k-text-2); margin: 0 0 20px; line-height: var(--k-lh-relaxed); }
.k-modal__actions { display: flex; flex-direction: column; gap: 8px; }
.k-sheet {
  width: 100%; max-width: var(--k-layout-content-max);
  padding: 12px var(--k-space-5) calc(var(--k-space-5) + env(safe-area-inset-bottom));
  border-radius: var(--k-radius-4xl) var(--k-radius-4xl) 0 0;
  background: var(--k-surface); color: var(--k-text);
  box-shadow: var(--k-shadow-modal);
  animation: k-sobe var(--k-dur-slide) var(--k-ease-out);
}
.k-sheet__handle { width: 40px; height: 5px; border-radius: var(--k-radius-pill); background: var(--k-border-strong); margin: 0 auto 16px; }

/* Balao de traducao ancorado (LicaoScreen.tsx, BalaoTraducao). */
.k-popover {
  position: relative; display: inline-block;
  max-width: var(--k-layout-balloon);
  padding: 12px 14px;
  border-radius: var(--k-radius-xl);
  background: var(--k-surface);
  border: 2px solid var(--k-border);
  box-shadow: var(--k-shadow-pop);
  color: var(--k-text);
}
.k-popover::before {
  content: ""; position: absolute; top: -9px; left: var(--k-popover-arrow, 50%);
  width: 14px; height: 14px; transform: translateX(-50%) rotate(45deg);
  background: inherit; border-left: 2px solid var(--k-border); border-top: 2px solid var(--k-border);
}

/* ───────────────────────── Toast ───────────────────────── */
.k-toast {
  display: inline-flex; align-items: center; gap: 10px;
  max-width: min(420px, calc(100vw - 32px));
  min-height: var(--k-touch-min);
  padding: 12px 16px;
  border-radius: var(--k-radius-xl);
  background: var(--k-tooltip-bg); color: var(--k-text-inverse);
  box-shadow: var(--k-shadow-pop);
  font-size: var(--k-fs-sm); font-weight: var(--k-fw-bold); line-height: var(--k-lh-normal);
}
.k-toast svg { width: 20px; height: 20px; flex: 0 0 auto; }
.k-toast--success svg { color: var(--k-success-500); }
.k-toast--error svg { color: var(--k-error-500); }
.k-toast--fixed {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(var(--k-layout-bottom-bar) + 16px + env(safe-area-inset-bottom));
  z-index: var(--k-z-toast);
  animation: k-toast-entra var(--k-dur-slide) var(--k-ease-out);
}

/* ───────────────────────── Admin / Business: KPI e tabela ───────────────────────── */
.k-kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--k-space-3); }
.k-kpi {
  padding: var(--k-space-4);
  border-radius: var(--k-radius-lg);
  background: var(--k-surface);
  border: 2px solid var(--k-border);
}
.k-kpi__label { font-size: var(--k-fs-2xs); font-weight: var(--k-fw-extrabold); letter-spacing: 0.04em; text-transform: uppercase; color: var(--k-text-2); margin: 0; }
.k-kpi__value { font-size: var(--k-fs-3xl); font-weight: var(--k-fw-extrabold); font-variant-numeric: tabular-nums; line-height: 1.15; margin: 4px 0 2px; color: var(--k-text-strong); }
.k-kpi__delta { font-size: var(--k-fs-xs); font-weight: var(--k-fw-bold); color: var(--k-text-2); margin: 0; }
.k-kpi__delta--up { color: var(--k-success-text); }
.k-kpi__delta--down { color: var(--k-error-text); }

.k-table-wrap { overflow-x: auto; border: 2px solid var(--k-border); border-radius: var(--k-radius-lg); background: var(--k-surface); }
.k-table { width: 100%; border-collapse: collapse; font-size: var(--k-fs-sm); }
.k-table th {
  text-align: left; white-space: nowrap;
  padding: 10px 12px;
  font-size: var(--k-fs-2xs); font-weight: var(--k-fw-extrabold); letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--k-text-2);
  background: var(--k-surface-2);
  border-bottom: 2px solid var(--k-border);
}
.k-table td { padding: 10px 12px; border-bottom: 1px solid var(--k-border); vertical-align: middle; }
.k-table tr:last-child td { border-bottom: none; }
.k-table tbody tr:hover td { background: var(--k-hover); }
.k-table .k-num, .k-table td.num, .k-table th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Abas de secao (admin/business). Ativa = indigo, igual ao menu do app. */
.k-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.k-tab {
  min-height: var(--k-touch-min);
  padding: 10px 18px;
  border: none; border-radius: var(--k-radius-pill);
  background: var(--k-surface-2); color: var(--k-text-2);
  font: inherit; font-size: var(--k-fs-sm); font-weight: var(--k-fw-bold);
  cursor: pointer;
}
.k-tab:hover { color: var(--k-text); }
.k-tab[aria-selected="true"], .k-tab--active { background: var(--k-indigo-500); color: #FFFFFF; }

/* ───────────────────────── Cabecalho ───────────────────────── */
.k-header {
  position: sticky; top: 0; z-index: var(--k-z-header);
  display: flex; align-items: center; justify-content: space-between; gap: var(--k-space-3);
  min-height: 60px;
  padding: calc(8px + env(safe-area-inset-top)) var(--k-space-4) 8px;
  background: var(--k-surface);
  border-bottom: 2px solid var(--k-border);
}
.k-header__brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.k-header__logo { width: 34px; height: 34px; border-radius: var(--k-radius-md); display: block; }
.k-wordmark { font-size: 22px; font-weight: var(--k-fw-black); letter-spacing: var(--k-ls-tight); color: var(--k-brand-text); }
.k-header__stats { display: flex; align-items: center; gap: 2px; }
@media (max-width: 420px) { .k-header .k-wordmark { display: none; } }

/* ───────────────────────── Navegacao ───────────────────────── */
/* Barra inferior (celular e app das lojas; some a partir de 1000 px). */
.k-tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: var(--k-z-bottom-bar);
  padding: 8px 16px max(8px, env(safe-area-inset-bottom));
  background: var(--k-surface);
  border-top: 2px solid var(--k-border);
}
.k-tabbar--static { position: relative; }
.k-tabbar__list { display: flex; gap: 4px; max-width: var(--k-layout-content-max); margin: 0 auto; padding: 0; list-style: none; }
.k-tabbar__item {
  flex: 1 1 0; position: relative;
  display: grid; place-items: center;
  min-height: var(--k-touch-comfortable);
  border: 2px solid transparent; border-radius: var(--k-radius-lg);
  background: transparent; color: var(--k-text-2);
  cursor: pointer;
}
.k-tabbar__item svg { width: 27px; height: 27px; }
.k-tabbar__item[aria-current="page"] { background: var(--k-accent-tint); border-color: var(--k-accent-tint-border); color: var(--k-accent); }
.k-tabbar__item .k-count { position: absolute; top: 2px; right: calc(50% - 22px); border: 2px solid var(--k-surface); box-sizing: content-box; }
@media (min-width: 1000px) { .k-tabbar:not(.k-tabbar--static) { display: none; } }

/* Menu lateral (desktop >= 1000 px). Medidas do Duolingo web (index.css). */
.k-sidemenu {
  display: flex; flex-direction: column; gap: 4px;
  width: var(--k-layout-side-menu);
  padding: 18px 12px;
  background: var(--k-surface);
  border-right: 2px solid var(--k-border);
}
.k-sidemenu__brand { padding: 6px 14px 22px; }
.k-sidemenu__item {
  display: flex; align-items: center; gap: 14px;
  width: 100%; min-height: var(--k-touch-comfortable);
  padding: 10px 14px;
  border: 2px solid transparent; border-radius: var(--k-radius-xl);
  background: transparent; color: var(--k-text);
  font: inherit; font-size: 14px; font-weight: var(--k-fw-extrabold); letter-spacing: var(--k-ls-label); text-transform: uppercase;
  text-align: left; text-decoration: none; cursor: pointer;
}
.k-sidemenu__item svg { width: 26px; height: 26px; color: var(--k-accent); flex: 0 0 auto; }
.k-sidemenu__item:hover { background: var(--k-accent-tint); }
.k-sidemenu__item[aria-current="page"] { background: var(--k-accent-tint); border-color: var(--k-accent-tint-border); color: var(--k-link); }
.k-sidemenu__rule { height: 1px; margin: 12px 14px; background: var(--k-border); border: 0; }

/* Linha de lista clicavel (Liga, Amigos, Perfil — index.css .linha-toque). */
.k-row-link {
  display: flex; align-items: center; gap: 12px; width: 100%;
  min-height: 56px; padding: 8px 12px;
  border: none; border-radius: var(--k-radius-lg);
  background: transparent; color: inherit; font: inherit; text-align: left; cursor: pointer;
  transition: background var(--k-dur-fast) ease, transform 60ms ease;
}
.k-row-link:hover { background: var(--k-hover); }
.k-row-link:active { transform: scale(0.985); }

/* Avatar / personagem */
.k-avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; background: var(--k-surface-2); flex: 0 0 auto; }
.k-avatar--lg { width: 72px; height: 72px; }
/* Mascote como REACAO: pequeno, num canto, olhando para o conteudo. */
.k-mascot { display: block; width: 100%; max-width: 160px; height: auto; }
.k-mascot--hero { max-width: 240px; }

/* ───────────────────────── Animacoes ───────────────────────── */
@keyframes k-sobe { from { transform: translateY(100%); } to { transform: translateY(0); } }
@keyframes k-toast-entra { from { opacity: 0; transform: translate(-50%, 12px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes k-balao-flutua { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-3px); } }
@keyframes k-pulse-ring { 0% { transform: scale(1); opacity: 0.55; } 100% { transform: scale(1.45); opacity: 0; } }
@keyframes k-anel-respira { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.045); } }
@keyframes k-no-respira { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
@keyframes k-no-entra { from { opacity: 0; transform: translateY(10px) scale(0.96); } to { opacity: 1; transform: none; } }
@keyframes k-shake { 0%,100% { transform: translateX(0); } 18% { transform: translateX(-9px); } 36% { transform: translateX(8px); } 54% { transform: translateX(-5px); } 72% { transform: translateX(4px); } 86% { transform: translateX(-2px); } }
@keyframes k-heartbeat { 0%,100% { transform: scale(1); } 22% { transform: scale(1.22); } 38% { transform: scale(1); } 58% { transform: scale(1.16); } }
@keyframes k-selo { 0% { opacity: 0; transform: scale(0.3) rotate(-12deg); } 60% { opacity: 1; transform: scale(1.12) rotate(4deg); } 100% { opacity: 1; transform: none; } }
@keyframes k-mascote-quica { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-14px) scale(1.05); } }

.k-anim-enter   { animation: k-no-entra var(--k-dur-enter) var(--k-ease-out) both; }
.k-anim-breathe { animation: k-no-respira var(--k-dur-loop-breathe) ease-in-out infinite; }
.k-anim-ring    { animation: k-anel-respira var(--k-dur-loop-ring) ease-in-out infinite; transform-origin: center; will-change: transform; }
.k-anim-shake   { animation: k-shake var(--k-dur-emphasis) var(--k-ease-shake); }
.k-anim-heart   { animation: k-heartbeat 1.1s ease-in-out infinite; }
.k-anim-seal    { animation: k-selo var(--k-dur-emphasis) var(--k-ease-spring) forwards; }
.k-anim-mascot  { animation: k-mascote-quica 1.2s ease-in-out infinite; }

/* Quem pediu menos movimento nao recebe nenhum. Nao e acessorio: animacao
   infinita e gatilho real para quem tem sensibilidade vestibular. */
@media (prefers-reduced-motion: reduce) {
  .k-btn, .k-lesson-card, .k-chip-lang, .k-node, .k-progress__fill { transition: none; }
  .k-balloon, .k-node--current::before, .k-answer--fixed, .k-sheet, .k-toast--fixed,
  .k-anim-enter, .k-anim-breathe, .k-anim-ring, .k-anim-shake, .k-anim-heart, .k-anim-seal, .k-anim-mascot {
    animation: none !important;
  }
  .k-anim-seal { opacity: 1; transform: none; }
}

/* ───────────────────────── Utilitarios minimos ───────────────────────── */
.k-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.k-stack { display: flex; flex-direction: column; gap: var(--k-space-3); }
.k-row { display: flex; align-items: center; flex-wrap: wrap; gap: var(--k-space-3); }
.k-container { width: 100%; max-width: var(--k-layout-content-max); margin: 0 auto; padding: 0 var(--k-layout-gutter); }