/*
  COMMIT — estilo base (tema escuro).
  A paleta fica em custom properties: cada curso poderá trocar --accent.
*/

:root {
  --bg: #0d1117;          /* fundo da página */
  --bg-raised: #161b22;   /* cartões e cabeçalho */
  --border: #30363d;
  --fg: #e6edf3;          /* texto principal */
  --fg-muted: #9198a1;    /* texto secundário */
  --accent: #4cc38a;      /* verde-terminal; muda por curso no futuro */
  --accent-contrast: #0d1117;
  --error: #f47067;

  --font-mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.6;
}

a {
  color: var(--accent);
}

/* Acessibilidade ------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.5rem 1rem;
}

.skip-link:focus {
  left: 0;
  z-index: 10;
}

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

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

/* Cabeçalho ------------------------------------------------------------ */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
}

.logo {
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-nav form {
  margin: 0;
}

.nav-user {
  color: var(--fg-muted);
}

/* Placar do jogador (XP, nível, streak) -------------------------------- */

.player-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
  white-space: nowrap;
}

.player-status strong {
  color: var(--fg);
}

/* O placar é um link para o dashboard (etapa 7). */
a.player-status {
  text-decoration: none;
  border-radius: 6px;
  padding: 0.15rem 0.4rem;
}

a.player-status:hover {
  background: var(--bg);
  color: var(--accent);
}

.stat-sep {
  color: var(--border);
}

/* Conteúdo ------------------------------------------------------------- */

.site-main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.card-narrow {
  max-width: 26rem;
  margin: 0 auto;
}

h1 {
  font-size: 1.4rem;
  margin-top: 0;
}

.prompt {
  color: var(--accent);
}

.muted {
  color: var(--fg-muted);
}

.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
}

/* Formulários ---------------------------------------------------------- */

.stack > div {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

input:focus {
  border-color: var(--accent);
  outline: none;
}

.helptext,
.stack ul {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.errorlist,
.form-error,
.message.error {
  color: var(--error);
  list-style: none;
  padding-left: 0;
}

.messages {
  list-style: none;
  padding: 0;
}

/* Prática (questões) --------------------------------------------------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.lesson-meta {
  margin-top: 0;
  font-size: 0.85rem;
}

/* Vidas da sessão ("conexões") ------------------------------------------ */

.lives {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.life {
  margin-left: 0.2rem;
}

.life.on {
  color: var(--accent);
}

.life.off {
  color: var(--fg-muted);
}

.feedback-xp {
  color: var(--accent);
  font-weight: bold;
}

.feedback-badges {
  list-style: none;
  padding: 0;
  color: var(--accent);
}

/* Aviso de congelamento de streak consumido nesta resposta. */
.feedback-freeze {
  color: #79c0ff;
}

.code-error {
  border-color: var(--error);
}

.choices {
  border: none;
  margin: 0 0 1rem;
  padding: 0;
}

.choice {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.choice:has(input:checked) {
  border-color: var(--accent);
}

.choice:has(input:disabled) {
  cursor: default;
  opacity: 0.7;
}

.feedback {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.feedback-result {
  font-weight: bold;
}

.feedback-result.correct {
  color: var(--accent);
}

.feedback-result.wrong {
  color: var(--error);
}

/* Resultado por item (pós-resposta) ------------------------------------ */

.is-right {
  border-color: var(--accent) !important;
  box-shadow: inset 3px 0 0 var(--accent);
}

.is-wrong {
  border-color: var(--error) !important;
  box-shadow: inset 3px 0 0 var(--error);
}

/* Completar código (banco de palavras) --------------------------------- */

.fill-code {
  line-height: 2.1; /* espaço para os botões de lacuna entre as linhas */
}

.gap {
  display: inline-block;
  min-width: 6ch;
  padding: 0 0.4ch;
  background: var(--bg-raised);
  border: 1px dashed var(--fg-muted);
  border-radius: 4px;
  color: var(--fg);
  font: inherit;
  vertical-align: baseline;
  cursor: pointer;
}

.gap.filled {
  border-style: solid;
  border-color: var(--accent);
}

.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0.25rem;
}

.word {
  padding: 0.35rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font: inherit;
  cursor: pointer;
}

.word:disabled {
  opacity: 0.35;
  cursor: default;
}

.word-bank-hint {
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

/* Ordenar blocos -------------------------------------------------------- */

.blocks {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.block-text {
  overflow-x: auto;
  white-space: pre;
}

.block-controls {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.btn-move {
  padding: 0.2rem 0.55rem;
  line-height: 1.2;
}

/* Encontrar o erro (linhas de código) ----------------------------------- */

.code-lines {
  border: none;
  margin: 0 0 1rem;
  padding: 0;
}

.code-line {
  display: block;
  margin-bottom: 2px;
  padding: 0.35rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  overflow-x: auto;
  white-space: pre;
}

.code-line:has(input:checked) {
  border-color: var(--accent);
}

.code-line:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.code-line:has(input:disabled) {
  cursor: default;
}

/*
  Realce de sintaxe (Pygments, gerado no servidor) ----------------------
  Classes curtas padrão do Pygments, escopadas em `.hl`.
  Tema próprio do projeto, commitado aqui — sem CDN.
*/

.hl .k, .hl .kr, .hl .kt, .hl .kd { color: #79c0ff; }          /* palavras-chave */
.hl .nb, .hl .nf { color: #d2a8ff; }                            /* builtins, funções */
.hl .s, .hl .s1, .hl .s2, .hl .sb { color: #a5d6ff; }           /* strings */
.hl .m, .hl .mi, .hl .mf { color: #f2cc60; }                    /* números */
.hl .c, .hl .c1, .hl .cm { color: var(--fg-muted); font-style: italic; }  /* comentários */
.hl .o { color: #ff7b72; }                                      /* operadores */

/* Seleção de curso (etapa 6) ------------------------------------------- */

.course-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 1rem;
}

.course-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.course-card:hover {
  border-color: var(--accent);
}

.course-title {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  color: var(--accent);
}

.course-description {
  font-size: 0.85rem;
}

.course-progress-label {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
}

/* Barra de progresso (cursos e nível) ----------------------------------- */

.progress-bar {
  height: 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
}

/* A barra do nível anima do preenchimento anterior (--from) ao atual
   (--to). Com prefers-reduced-motion a animação é desligada globalmente
   e fica só o estado final (width: var(--to)). */
.level-bar .progress-fill {
  width: var(--to, 0%);
  animation: level-fill 0.9s ease-out;
}

@keyframes level-fill {
  from { width: var(--from, 0%); }
  to   { width: var(--to, 0%); }
}

/* Mapa da trilha (etapa 6) ---------------------------------------------- */

.track {
  margin-bottom: 1.5rem;
}

.track-title {
  font-size: 1rem;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
}

.lesson-path {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lesson-node {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  /* O "caminho": um conector vertical entre os nós. */
  position: relative;
}

.lesson-node:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 1.35rem;
  top: 100%;
  height: 0.5rem;
  border-left: 2px solid var(--border);
}

.lesson-node.current {
  border-color: var(--accent);
}

.lesson-node.locked {
  opacity: 0.6;
}

.node-marker {
  flex-shrink: 0;
  width: 1.25rem;
  text-align: center;
}

.lesson-node.completed .node-marker {
  color: var(--accent);
}

.node-body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.75rem;
}

.node-title {
  color: var(--fg);
}

a.node-title:hover {
  color: var(--accent);
}

.node-score {
  font-size: 0.85rem;
  color: var(--accent);
}

.node-score.below-min {
  color: var(--error);
}

.node-hint {
  font-size: 0.85rem;
}

.current-hint {
  color: var(--accent);
}

/* Tela de conclusão de fase (etapa 6) ------------------------------------ */

.result-transaction {
  font-size: 1.05rem;
}

.result-stats {
  display: flex;
  gap: 2rem;
  margin: 0 0 1rem;
}

.result-stats dt {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.result-stats dd {
  margin: 0;
  font-size: 1.2rem;
  font-weight: bold;
}

.result-block {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.result-heading {
  font-size: 0.95rem;
  color: var(--fg-muted);
  margin: 0 0 0.5rem;
}

.delta.up {
  color: var(--accent);
}

.delta.down {
  color: var(--error);
}

.delta.same {
  color: var(--fg-muted);
}

.level-up {
  color: var(--accent);
}

.level-line {
  margin-bottom: 0.4rem;
}

.badge-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.badge-list li {
  margin-bottom: 0.35rem;
}

.recommendation {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.result-actions form {
  margin: 0;
}

/* Curso concluído -------------------------------------------------------- */

.course-done-tag {
  padding: 0.05rem 0.5rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: normal;
  vertical-align: middle;
  white-space: nowrap;
}

.course-complete-banner {
  border-color: var(--accent);
  margin-bottom: 1.5rem;
}

.badge-line {
  margin: 0.5rem 0;
}

/* Etiqueta de sessão de revisão ----------------------------------------- */

.review-tag {
  padding: 0.05rem 0.5rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.8rem;
}

/* Dashboard (etapa 7) ---------------------------------------------------- */

.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-tile {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-label {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: bold;
}

.stat-sub {
  color: var(--fg-muted);
  font-size: 0.8rem;
  font-weight: normal;
}

/* Congelamento de streak no tile: azul-gelo quando disponível, âmbar
   quando já gasto no mês (o custo de faltar fica visível). */
.freeze-ok {
  color: #79c0ff;
}

.freeze-used {
  color: #f2cc60;
}

.dash-section {
  margin-bottom: 1rem;
}

.dash-heading {
  font-size: 1rem;
  color: var(--fg-muted);
  margin: 0 0 0.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
}

.dash-heading + .dash-heading,
table + .dash-heading {
  margin-top: 1.25rem;
}

/* Meta semanal */

.goal-count {
  margin: 0 0 0.5rem;
}

.goal-done,
.goal-check {
  color: var(--accent);
}

.goal-form {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.goal-form label {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.goal-input {
  width: 5rem;
  padding: 0.35rem 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

/* Pontos fracos */

.weak-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.weak-item {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  padding: 0.5rem 0;
}

.weak-item + .weak-item {
  border-top: 1px solid var(--border);
}

.weak-topic {
  color: var(--error);
  font-weight: bold;
}

.weak-rate {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.weak-link {
  margin-left: auto;
  font-size: 0.85rem;
  padding: 0.25rem 0.6rem;
}

/* Gráfico de atividade (SVG gerado no servidor) */

.activity-chart {
  display: block;
  width: 100%;
  height: auto;
}

.chart-tick {
  fill: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0.5rem 0 0;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.legend-swatch {
  display: inline-block;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 3px;
}

.legend-swatch + span,
.swatch-wrong {
  margin-left: 0.75rem;
}

.swatch-correct {
  background: var(--accent);
}

/* A mesma hachura do SVG, para a legenda casar com o gráfico. */
.swatch-wrong {
  background: repeating-linear-gradient(
    45deg,
    var(--error) 0 2px,
    var(--bg-raised) 2px 4px
  );
}

.chart-table {
  margin-top: 0.75rem;
  font-size: 0.85rem;
}

.chart-table summary {
  cursor: pointer;
  color: var(--fg-muted);
}

.chart-table-note {
  font-size: 0.8rem;
}

/* Tabelas do dashboard */

.dash-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.dash-table th {
  text-align: left;
  color: var(--fg-muted);
  font-weight: normal;
  font-size: 0.8rem;
}

.dash-table th,
.dash-table td {
  padding: 0.35rem 0.5rem 0.35rem 0;
  border-bottom: 1px solid var(--border);
}

.dash-table .col-percent {
  text-align: right;
}

.table-sub {
  font-size: 0.8rem;
}

/* Cursos e badges no dashboard */

.dash-course {
  margin-bottom: 1rem;
}

.dash-course .progress-bar {
  margin: 0.35rem 0;
}

.badge-locked {
  color: var(--fg-muted);
}

.badge-locked strong {
  color: inherit;
}

/* Botões --------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  filter: brightness(1.1);
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

select {
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

select:focus {
  border-color: var(--accent);
  outline: none;
}

/* Seletor de turma da tela de piloto. */
.pilot-picker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.pilot-picker .muted {
  margin: 0 0 0 auto;
}

.mono {
  font-family: inherit;
  letter-spacing: 0.1em;
}

/* Linha com rótulo à esquerda e ação à direita (lista de turmas). */
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

ul.stack {
  list-style: none;
  padding-left: 0;
}

ul.stack > li {
  margin-bottom: 0.75rem;
}