/* =========================
   VARIABLES DE MARCA
========================= */
:root {
  --kng-primary: #0f766e;
  --kng-primary-dark: #0d5f5a;
  --kng-secondary: #2563eb;
  --kng-bg: #f0fdfa;
  --kng-card: #ffffff;
  --kng-text: #0f172a;
  --kng-muted: #64748b;
  --kng-border: #e2e8f0;
  --kng-success-bg: #ecfdf5;
  --kng-success-border: #22c55e;
  --kng-error-bg: #fef2f2;
  --kng-error-border: #ef4444;
  --kng-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  --kng-option-bg: #f8fafc;
  --kng-option-hover-bg: #f3fbf9;
  --kng-option-hover-border: #6fcfbe;
}

/* =========================
   RESET
========================= */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--kng-bg);
  color: var(--kng-text);
}

/* =========================
   CONTENEDOR PRINCIPAL
========================= */
.app-shell {
  max-width: 920px;
  margin: 40px auto;
  padding: 0 16px;
}

.quiz-card {
  background: var(--kng-card);
  border-radius: 24px;
  padding: 30px;
  box-shadow: var(--kng-shadow);
  overflow: hidden;
}

/* =========================
   IMAGEN SUPERIOR
========================= */
.quiz-banner {
  margin: -30px -30px 24px;
  padding: 20px 20px 0;
  display: flex;
  justify-content: center;
  background: linear-gradient(180deg, #e6fffb 0%, #f8fffe 100%);
}

.quiz-banner img {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto;
}

/* =========================
   PROGRESO
========================= */
.quiz-topbar {
  margin-bottom: 24px;
}

.progress-text {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--kng-muted);
}

.progress-track {
  height: 8px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--kng-secondary);
  transition: width 0.3s ease;
}

/* =========================
   PREGUNTA
========================= */
.question-text {
  margin: 0 0 22px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
}

/* =========================
   OPCIONES
========================= */
.answers {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.answer-button {
  width: 100%;
  background: var(--kng-option-bg);
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 16px 18px;
  text-align: left;
  color: var(--kng-text);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.45;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.answer-button:hover {
  background: var(--kng-option-hover-bg);
  border-color: var(--kng-option-hover-border);
  transform: translateY(-1px);
}

.answer-button.correct {
  background: #dcfce7;
  border-color: var(--kng-success-border);
}

.answer-button.incorrect {
  background: #fee2e2;
  border-color: var(--kng-error-border);
}

.answer-button:disabled {
  pointer-events: none;
  opacity: 0.8;
}

/* =========================
   FEEDBACK
========================= */
.feedback-panel {
  margin-top: 22px;
  padding: 14px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.55;
}

.feedback-panel.correct {
  background: var(--kng-success-bg);
  border: 1px solid var(--kng-success-border);
}

.feedback-panel.incorrect {
  background: var(--kng-error-bg);
  border: 1px solid var(--kng-error-border);
}

.feedback-text {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}

.explanation-text {
  margin: 0;
  color: var(--kng-text);
}

.feedback-panel .action-button {
  display: flex;
  width: fit-content;
  margin-top: 14px;
  margin-left: auto;
}

.hidden {
  display: none;
}

/* =========================
   BOTONES
========================= */
.action-button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--kng-primary);
  color: #fff;
  padding: 12px 22px;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.action-button:hover,
button:hover {
  background: var(--kng-primary-dark);
  transform: translateY(-1px);
}

.secondary-button {
  background: #e2e8f0;
  color: #111827;
}

.secondary-button:hover {
  background: #cbd5e1;
}

.result-actions {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* =========================
   RESULTADO FINAL
========================= */
.result-screen {
  text-align: center;
  padding: 24px 6px 6px;
}

.result-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 8px 14px;
  border-radius: 999px;
  background: #dbeafe;
  color: var(--kng-secondary);
  font-size: 14px;
  font-weight: 700;
}

.result-screen h2 {
  margin: 0 0 10px;
  font-size: 28px;
}

.score-text {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--kng-muted);
}

.result-message {
  margin: 0;
  font-size: 16px;
  color: var(--kng-muted);
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
  .app-shell {
    margin: 20px auto;
    padding: 0 12px;
  }

  .quiz-card {
    padding: 22px;
    border-radius: 20px;
  }

  .quiz-banner {
    margin: -22px -22px 20px;
    padding: 16px 16px 0;
  }

  .quiz-banner img {
    max-width: 320px;
  }

  .question-text {
    margin-bottom: 20px;
    font-size: 19px;
  }

  .answers {
    gap: 12px;
  }

  .feedback-panel {
    padding: 12px 14px;
  }

  .feedback-panel .action-button {
    width: 100%;
    margin-left: 0;
  }

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

  .action-button,
  button {
    width: 100%;
  }
}