/* =========================================================
   PyQuiz — Revisão de Lógica em Python
   Tema Cyberpunk/Hacker — modo escuro (padrão) e claro
   ========================================================= */

:root {
  --bg: #04060a;
  --bg-grid-line: rgba(57, 255, 20, 0.05);
  --surface: #0c1118;
  --surface-alt: #121a22;
  --border: #1d2a26;
  --text: #d8fbe9;
  --text-dim: #8fa89c;
  --neon-green: #39ff14;
  --neon-green-soft: rgba(57, 255, 20, 0.15);
  --neon-orange: #ff8c1a;
  --neon-orange-soft: rgba(255, 140, 26, 0.15);
  --danger: #ff4d4d;
  --danger-soft: rgba(255, 77, 77, 0.15);
  --font-mono: "Share Tech Mono", "VT323", "Courier New", monospace;
  --radius: 10px;
  --shadow-glow-green: 0 0 14px rgba(57, 255, 20, 0.45);
  --shadow-glow-orange: 0 0 14px rgba(255, 140, 26, 0.45);
  --transition: 0.25s ease;
}

[data-theme="light"] {
  --bg: #eef3f1;
  --bg-grid-line: rgba(10, 143, 77, 0.06);
  --surface: #ffffff;
  --surface-alt: #f0f5f2;
  --border: #c9d6d0;
  --text: #12261d;
  --text-dim: #4c6157;
  --neon-green: #0a8f4d;
  --neon-green-soft: rgba(10, 143, 77, 0.12);
  --neon-orange: #cc5500;
  --neon-orange-soft: rgba(204, 85, 0, 0.12);
  --danger: #c62828;
  --danger-soft: rgba(198, 40, 40, 0.12);
  --shadow-glow-green: 0 0 10px rgba(10, 143, 77, 0.25);
  --shadow-glow-orange: 0 0 10px rgba(204, 85, 0, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

[data-theme="light"] {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image: linear-gradient(var(--bg-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--text);
  font-family: var(--font-mono);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition), color var(--transition);
}

/* Efeito de scanlines estilo terminal */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.08) 0,
    rgba(0, 0, 0, 0.08) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.4;
}

[data-theme="light"] .scanlines {
  opacity: 0.12;
}

/* Chuva de 0 e 1 atrás de todo o conteúdo */
.matrix-rain {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.5;
}

[data-theme="light"] .matrix-rain {
  opacity: 0.25;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--neon-green);
  color: #000;
  padding: 0.5rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.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;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background-color: var(--bg);
  z-index: 10;
}

.logo {
  font-size: 1.3rem;
  font-weight: bold;
  letter-spacing: 1px;
  color: var(--neon-green);
  text-shadow: var(--shadow-glow-green);
}

.logo-bracket {
  color: var(--neon-orange);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.theme-toggle:hover {
  border-color: var(--neon-green);
  box-shadow: var(--shadow-glow-green);
}

[data-theme="dark"] .icon-sun,
[data-theme="light"] .icon-moon {
  display: none;
}

/* ---------- Layout principal ---------- */
main {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem 3rem;
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 720px;
  width: 100%;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);
}

.hidden {
  display: none !important;
}

/* ---------- Tela de identificação (gate) ---------- */
.terminal h1 {
  color: var(--neon-green);
  text-shadow: var(--shadow-glow-green);
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--text-dim);
  margin-top: 0;
}

.intro-text {
  margin-bottom: 1rem;
}

#gate-form {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

#gate-form label {
  color: var(--neon-orange);
  font-size: 0.9rem;
}

#gate-form input[type="text"] {
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
}

#gate-form input[type="text"]:focus-visible {
  outline: 3px solid var(--neon-orange);
  outline-offset: 2px;
}

.field-error {
  color: var(--danger);
  min-height: 1.2em;
  font-size: 0.9rem;
}

.rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  border-top: 1px dashed var(--border);
  padding-top: 1rem;
}

/* ---------- Botões ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid var(--neon-green);
  background: transparent;
  color: var(--neon-green);
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--neon-green);
  color: #04100a;
  box-shadow: var(--shadow-glow-green);
  outline: none;
}

.btn-secondary {
  border-color: var(--neon-orange);
  color: var(--neon-orange);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--neon-orange);
  color: #1a0f00;
  box-shadow: var(--shadow-glow-orange);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------- HUD do quiz ---------- */
.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.hud-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
  min-width: 90px;
}

.hud-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

.hud-value {
  font-size: 1.1rem;
  color: var(--neon-green);
  font-weight: bold;
}

.streak-item .hud-value {
  color: var(--neon-orange);
}

/* ---------- Barra de progresso ---------- */
.progress-track {
  height: 16px;
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--neon-green), var(--neon-orange));
  box-shadow: var(--shadow-glow-green);
  transition: width 0.4s ease;
}

.topic-badge {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--neon-orange);
  border: 1px solid var(--neon-orange);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  margin: 0 0 1rem;
}

/* ---------- Pergunta e alternativas ---------- */
fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  font-size: 1.15rem;
  color: var(--text);
  padding: 0;
  margin-bottom: 1rem;
  width: 100%;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.option-label:hover {
  border-color: var(--neon-green);
}

.option-label input {
  accent-color: var(--neon-green);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.option-label input:focus-visible {
  outline: 3px solid var(--neon-orange);
  outline-offset: 2px;
}

.option-label.is-correct {
  border-color: var(--neon-green);
  background-color: var(--neon-green-soft);
  box-shadow: var(--shadow-glow-green);
}

.option-label.is-incorrect {
  border-color: var(--danger);
  background-color: var(--danger-soft);
}

.feedback-message {
  min-height: 1.4em;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.feedback-message:empty {
  padding: 0;
}

.feedback-message.correct {
  color: var(--neon-green);
  background-color: var(--neon-green-soft);
  border-left: 4px solid var(--neon-green);
}

.feedback-message.incorrect {
  color: var(--danger);
  background-color: var(--danger-soft);
  border-left: 4px solid var(--danger);
}

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.8rem;
  margin-top: 1rem;
}

/* ---------- Resultados ---------- */
#results-screen {
  text-align: center;
}

.result-name {
  color: var(--neon-orange);
  font-size: 1.1rem;
  margin: 0.25rem 0 0;
}

.result-emoji {
  font-size: 4rem;
  margin: 0.5rem 0;
}

.result-message {
  font-size: 1.15rem;
  color: var(--neon-green);
}

.result-stats {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1rem 0;
}

.result-actions {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 998;
}

.confetti-piece {
  position: absolute;
  top: -2rem;
  font-size: 1.6rem;
  animation: confetti-fall 2.6s linear forwards;
}

@keyframes confetti-fall {
  to {
    transform: translateY(110vh) rotate(360deg);
    opacity: 0.2;
  }
}

/* ---------- Rodapé ---------- */
.site-footer {
  text-align: center;
  padding: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ---------- Acessibilidade / responsividade ---------- */
:focus-visible {
  outline: 3px solid var(--neon-orange);
  outline-offset: 2px;
}

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

@media (max-width: 600px) {
  .card {
    padding: 1.25rem;
  }

  .hud {
    gap: 0.6rem;
  }

  .hud-item {
    min-width: 75px;
    padding: 0.4rem 0.6rem;
  }

  .terminal h1 {
    font-size: 1.3rem;
  }

  .quiz-actions {
    flex-direction: column-reverse;
  }

  .quiz-actions .btn {
    width: 100%;
  }

  .result-actions {
    flex-direction: column;
  }

  .result-actions .btn {
    width: 100%;
  }
}


/* Link para voltar à página inicial da disciplina, ao lado do botão de tema */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--neon-green);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.8rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.back-link:hover,
.back-link:focus-visible {
  border-color: var(--neon-green);
  box-shadow: var(--shadow-glow-green);
}

.back-short {
  display: none;
}

@media (max-width: 480px) {
  .back-link {
    font-size: 0.8rem;
    padding: 0.35rem 0.6rem;
  }

  .back-full {
    display: none;
  }

  .back-short {
    display: inline;
  }
}