/* lessons.css — ekran nauki (Faza 6): rozdzialy, lista lekcji, odtwarzacz */

/* ---- lista rozdzialow ---- */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--sp-3);
}
.chapter-card {
  appearance: none;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--sp-4);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color .15s var(--ease), transform .12s var(--ease);
}
.chapter-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.chapter-card.is-complete { border-color: var(--cls-best); }
.chapter-card-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--bg-sunken);
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.chapter-card-title { font-size: 17px; font-weight: 650; }
.chapter-card-desc { font-size: 13px; color: var(--text-dim); line-height: 1.4; flex: 1; }
.chapter-card-progress { font-size: 12px; font-family: var(--font-mono); color: var(--accent-strong); margin-top: 6px; }

/* ---- lista lekcji w rozdziale ---- */
.lessons-chapter { max-width: 720px; margin: 0 auto; }
.chapter-desc { color: var(--text-dim); margin: var(--sp-2) 0 var(--sp-5); }

.lesson-list { display: flex; flex-direction: column; gap: var(--sp-2); }
.lesson-row {
  appearance: none;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-align: left;
  padding: 12px var(--sp-4);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}
.lesson-row:hover { border-color: var(--accent); }
.lesson-row.is-done { border-color: var(--cls-best); }
.lesson-row-badge {
  width: 26px; height: 26px; flex: 0 0 auto;
  border-radius: 50%;
  background: var(--bg-sunken);
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
  color: var(--text-dim);
}
.lesson-row.is-done .lesson-row-badge { background: var(--cls-best); color: #fff; }
.lesson-row-title { font-size: 14.5px; font-weight: 550; }

/* ---- odtwarzacz lekcji ---- */
.lesson-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.lesson-header-title { font-weight: 650; font-size: 15px; }
.lesson-header-progress { margin-left: auto; font-size: 12.5px; color: var(--text-dim); font-family: var(--font-mono); }

.lesson-content-card h3 { font-size: 16px; margin-bottom: 8px; }
.lesson-content-card p[data-role="step-body"] { font-size: 14.5px; line-height: 1.6; color: var(--text); margin: 0; }

.quiz-choices[hidden] { display: none; }
.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.quiz-choice {
  appearance: none;
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
}
.quiz-choice:hover:not(:disabled) { border-color: var(--accent); }
.quiz-choice:disabled { cursor: default; }
.quiz-choice.is-correct { border-color: var(--cls-best); background: color-mix(in srgb, var(--cls-best) 16%, var(--bg-sunken)); }
.quiz-choice.is-wrong { border-color: var(--cls-blunder); background: color-mix(in srgb, var(--cls-blunder) 16%, var(--bg-sunken)); }

.quiz-mark {
  margin-left: 8px;
  font-weight: 700;
}
.quiz-mark--correct { color: var(--cls-best); }
.quiz-mark--wrong { color: var(--cls-blunder); }

/* Pusty region zwrotny nie zajmuje miejsca, ale zostaje w drzewie dostepnosci
   — patrz js/ui/feedback.js. */
.lesson-feedback:empty { display: none; }
.lesson-feedback {
  margin: var(--sp-4) 0 0;
  padding: 12px 14px;
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.5;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  border: 1px solid transparent;
}
.lesson-feedback::before {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
}
.lesson-feedback.is-success {
  background: color-mix(in srgb, var(--cls-best) 14%, var(--bg-sunken));
  border-color: color-mix(in srgb, var(--cls-best) 35%, var(--border));
  color: var(--text);
}
.lesson-feedback.is-success::before { content: "✓"; background: var(--cls-best); color: #fff; }
.lesson-feedback.is-error {
  background: color-mix(in srgb, var(--cls-blunder) 12%, var(--bg-sunken));
  border-color: color-mix(in srgb, var(--cls-blunder) 32%, var(--border));
  color: var(--text);
}
.lesson-feedback.is-error::before { content: "×"; background: var(--cls-blunder); color: #fff; }
.lesson-feedback.is-progress { background: var(--bg-sunken); color: var(--text-dim); font-family: var(--font-mono); }
.lesson-feedback.is-progress::before { content: "…"; background: var(--bg-raised); border: 1px solid var(--border); }

@keyframes feedback-enter {
  from { opacity: 0; transform: translateY(4px); clip-path: inset(0 0 18% 0); }
  to { opacity: 1; transform: translateY(0); clip-path: inset(0); }
}
.lesson-feedback.is-entering { animation: feedback-enter 200ms cubic-bezier(.22,1,.36,1) both; }

@media (prefers-reduced-motion: reduce) {
  .lesson-feedback.is-entering { animation: none; }
}

@media (max-width: 480px) {
  .lesson-header-title { display: none; }
}