/* =========================================================
   Brazilian Portuguese Quiz — Global layout
   ========================================================= */

:root {
  --app-bg: #f4f6fa;
  --app-card: #ffffff;
  --app-primary: #2563eb;
  --app-primary-dark: #1d4ed8;
  --app-accent: #0d9488;
  --app-radius: 14px;
  --app-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --pt-bg: #f8fafc;
}

.app-body {
  background: linear-gradient(160deg, var(--app-bg) 0%, #e8ecf4 100%);
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Arial, "Noto Sans Arabic", sans-serif;
}

.app-shell {
  max-width: 1100px;
  margin: 0 auto;
}

.app-title {
  font-weight: 700;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.app-subtitle {
  font-size: 0.95rem;
}

/* Cards */
.app-card {
  border-radius: var(--app-radius);
  transition: box-shadow 0.25s ease, transform 0.2s ease;
}

.app-card:hover {
  box-shadow: var(--app-shadow);
}

.rules-list {
  padding-inline-start: 1.25rem;
  line-height: 1.85;
}

/* Topic chips (home) */
.topic-chips .col-auto .chip {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: #e0e7ff;
  color: #312e81;
  border: 1px solid #c7d2fe;
  font-size: 0.8rem;
}

/* Progress */
.app-progress {
  height: 10px;
  border-radius: 999px;
  background-color: #e2e8f0;
  overflow: hidden;
}

.app-progress .progress-bar {
  background: linear-gradient(90deg, var(--app-primary), var(--app-accent));
  border-radius: 999px;
}

.topic-badge {
  background: #0f766e !important;
  color: #fff !important;
  font-weight: 600;
  padding: 0.45em 0.9em;
}

/* Section labels (Arabic) — separate title from exercise body */
.mp-block-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #64748b;
  text-transform: none;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid #e2e8f0;
}

/* Portuguese instruction block (exercise «title») */
.mp-instruction-box {
  background: var(--pt-bg);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  border: 1px solid #cbd5e1;
  border-inline-start: 4px solid var(--app-primary);
}

.mp-instruction-text {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.55;
}

.pt-text,
.ltr-inline {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
  color: #0f172a;
  font-weight: 600;
  line-height: 1.5;
}

/* Exercise instruction (Portuguese) — may span lines */
#quiz-question-text {
  white-space: pre-line;
}

/* Multi-part exercise items (sub-questions — visually under «الجمل») */
.mp-items {
  margin-top: 0;
  padding-top: 0.25rem;
}

.mp-item .pt-item-text {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
  color: #0f172a;
  font-weight: 500;
}

.mp-item-num {
  font-weight: 700;
  color: #64748b;
  margin-inline-end: 0.25rem;
}

.mp-input {
  max-width: 100%;
}

.mp-corr-sub {
  border-radius: 10px;
  padding: 0.65rem 0.85rem;
  margin-bottom: 0.5rem;
  border: 1px solid #e2e8f0;
  background: #fafafa;
}

.mp-corr-sub.sub-ok {
  border-color: #86efac;
  background: #f0fdf4;
}

.mp-corr-sub.sub-bad {
  border-color: #fca5a5;
  background: #fef2f2;
}

/* Answer area */
.answer-area .form-check {
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  margin-bottom: 0.5rem;
  transition: background 0.2s, border-color 0.2s;
}

.answer-area .form-check:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.answer-area .form-check-input {
  float: inline-end;
  margin-inline-start: 0.5rem;
}

.answer-area .form-check-label {
  width: 100%;
  cursor: pointer;
}

.answer-area .pt-option {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
  display: inline-block;
  width: 100%;
}

.answer-area .form-control,
.answer-area .form-select {
  direction: ltr;
  text-align: left;
}

/* Buttons */
.app-btn-primary {
  border-radius: 12px;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.quiz-nav .btn {
  border-radius: 10px;
  min-width: 110px;
  font-weight: 600;
}

/* Results */
.feedback-text {
  color: #334155;
  max-width: 36rem;
  margin-inline: auto;
}

.correction-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.correction-item {
  border-radius: var(--app-radius);
  padding: 1rem 1.15rem;
  border: 2px solid #e2e8f0;
  background: #fff;
  transition: border-color 0.2s, background 0.2s;
}

.correction-item.correct {
  border-color: #22c55e;
  background: linear-gradient(135deg, #f0fdf4 0%, #fff 100%);
}

.correction-item.incorrect {
  border-color: #ef4444;
  background: linear-gradient(135deg, #fef2f2 0%, #fff 100%);
}

.correction-item .corr-num {
  font-size: 0.8rem;
  color: #64748b;
  font-weight: 600;
}

.correction-item .corr-topic {
  font-size: 0.75rem;
}

.correction-item .corr-q {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
  font-weight: 600;
  color: #0f172a;
  margin: 0.5rem 0;
  white-space: pre-line;
}

.correction-item .corr-row {
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.correction-item .label-ar {
  color: #475569;
  font-weight: 600;
}

.correction-item .val-pt {
  direction: ltr;
  display: inline-block;
  unicode-bidi: embed;
  color: #0f172a;
}

.correction-item .explanation {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px dashed #cbd5e1;
  font-size: 0.9rem;
  color: #334155;
  line-height: 1.6;
}

/* Screen transitions */
.app-screen {
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.app-screen.d-none {
  animation: none;
}

/* Small screens */
@media (max-width: 576px) {
  .quiz-nav {
    flex-direction: column;
  }

  .quiz-nav .ms-auto {
    margin-inline-start: 0 !important;
    width: 100%;
  }

  .quiz-nav .d-flex.gap-2 {
    width: 100%;
  }

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