/* ═══════════════════════════════════════════════
   HILEL ACADEMY — Learning Platform Styles
   ═══════════════════════════════════════════════ */

/* ─── Academy Header ─── */
.academy-hero {
  text-align: center;
  padding: 40px 0 32px;
}
.academy-hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: 8px; }
.academy-hero .subtitle { color: var(--text-secondary); max-width: 600px; margin: 0 auto 24px; font-size: 0.95rem; }

.academy-stats {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}
.academy-stat {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); padding: 10px 18px;
  font-size: 0.8rem; color: var(--text-secondary);
}
.academy-stat .val {
  font-family: 'Secular One', sans-serif; font-size: 1.2rem;
  color: var(--purple-light); display: block;
}

/* ─── Course Cards Grid ─── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px; margin-top: 28px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.course-card:hover {
  border-color: rgba(201,102,232,0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(133,4,162,0.2);
}
.course-card.locked { opacity: 0.7; }
.course-card.locked:hover { transform: none; }

.course-thumb {
  height: 140px;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  position: relative;
}
.course-thumb::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 40px;
  background: linear-gradient(to top, var(--bg-card), transparent);
}

.course-body { padding: 20px 24px 24px; }
.course-body h3 { font-size: 1.1rem; margin-bottom: 6px; }
.course-body .desc { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }

.course-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.78rem; color: var(--text-secondary);
}
.course-meta .lessons { display: flex; align-items: center; gap: 4px; }
.course-meta .duration { display: flex; align-items: center; gap: 4px; }

.course-progress {
  margin-top: 14px;
}
.progress-bar {
  height: 6px; background: rgba(133,4,162,0.15); border-radius: 3px; overflow: hidden;
}
.progress-fill {
  height: 100%; border-radius: 3px; transition: width 0.5s ease;
  background: linear-gradient(90deg, var(--purple), var(--purple-light));
}
.progress-text {
  font-size: 0.72rem; color: var(--text-secondary); margin-top: 4px; text-align: start;
}

.course-badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 12px; border-radius: var(--radius-pill);
  font-size: 0.7rem; font-weight: 700;
}
.badge-free { background: var(--green); color: #0a0a1e; }
.badge-new { background: var(--gold); color: #0a0a1e; }
.badge-popular { background: var(--pink); color: white; }
.badge-locked { background: rgba(255,255,255,0.1); color: var(--text-secondary); }

/* ─── Lesson Page ─── */
.lesson-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  min-height: calc(100vh - var(--nav-height));
}
@media (max-width: 900px) {
  .lesson-layout { grid-template-columns: 1fr; }
}

/* Sidebar */
.lesson-sidebar {
  background: var(--bg-secondary);
  border-left: 1px solid var(--glass-border);
  padding: 24px 0;
  position: sticky; top: var(--nav-height); height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}
@media (max-width: 900px) {
  .lesson-sidebar {
    position: fixed; top: 0; right: -320px; width: 300px; height: 100vh;
    z-index: 1000; border-left: 1px solid var(--glass-border);
    transition: right 0.3s ease; padding-top: 24px;
  }
  .lesson-sidebar.open { right: 0; }
  .sidebar-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.6);
    z-index: 999; display: none;
  }
  .sidebar-overlay.show { display: block; }
}

.sidebar-header {
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 8px;
}
.sidebar-header h3 { font-size: 0.95rem; margin-bottom: 4px; }
.sidebar-header .progress-text { font-size: 0.75rem; }

.chapter-list { list-style: none; }
.chapter-item {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  border-right: 3px solid transparent;
}
.chapter-item:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}
.chapter-item.active {
  background: var(--glass-bg);
  color: var(--purple-light);
  border-right-color: var(--purple-light);
}
.chapter-item.completed { color: var(--green); }
.chapter-item .ch-icon { width: 22px; text-align: center; flex-shrink: 0; font-size: 0.9rem; }
.chapter-item .ch-title { flex: 1; }

/* Main Content */
.lesson-main {
  padding: 40px;
  max-width: 820px;
}
@media (max-width: 900px) {
  .lesson-main { padding: 24px 16px; }
}

.lesson-breadcrumb {
  font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 24px;
  display: flex; align-items: center; gap: 8px;
}
.lesson-breadcrumb a { color: var(--purple-light); }

.lesson-title {
  font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 8px;
}
.lesson-subtitle {
  font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 32px;
}

/* Content Blocks */
.content-block { margin-bottom: 36px; }
.content-block h2 {
  font-size: 1.4rem; margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--glass-border);
}
.content-block h3 {
  font-size: 1.1rem; margin-bottom: 12px; color: var(--purple-light);
}
.content-block p {
  margin-bottom: 16px; line-height: 1.9; font-size: 0.95rem;
}
.content-block ul, .content-block ol {
  padding-right: 24px; margin-bottom: 16px;
}
.content-block li {
  margin-bottom: 8px; line-height: 1.7; font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Info Box */
.info-box {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-bottom: 24px;
}
.info-box.tip { border-right: 4px solid var(--gold); }
.info-box.warning { border-right: 4px solid var(--orange); }
.info-box.important { border-right: 4px solid var(--pink); }
.info-box .info-title {
  font-family: 'Secular One', sans-serif;
  font-size: 0.9rem; margin-bottom: 6px;
}

/* Number Cards */
.number-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px; margin-bottom: 28px;
}
.number-mini {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}
.number-mini:hover {
  border-color: var(--purple);
  transform: translateY(-2px);
}
.number-mini.active {
  border-color: var(--purple-light);
  background: rgba(133,4,162,0.12);
}
.number-mini .nm-num {
  font-family: 'Secular One', sans-serif;
  font-size: 1.8rem;
  color: var(--purple-light);
}
.number-mini .nm-name {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.number-detail {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 28px;
  display: none;
}
.number-detail.visible { display: block; animation: fadeIn 0.3s ease; }
.number-detail h3 { margin-bottom: 16px; }

/* Tables */
.content-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.88rem;
}
.content-table th, .content-table td {
  padding: 12px 16px;
  text-align: right;
  border-bottom: 1px solid var(--glass-border);
}
.content-table th {
  background: var(--glass-bg);
  font-family: 'Secular One', sans-serif;
  font-size: 0.82rem;
  color: var(--purple-light);
}
.content-table td { color: var(--text-secondary); }
.content-table tr:hover td { background: rgba(133,4,162,0.04); }

/* ─── Exercise System ─── */
.exercise-block {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  margin: 32px 0;
}
.exercise-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 20px;
}
.exercise-header .ex-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: #0a0a1e;
}
.exercise-header .ex-title {
  font-family: 'Secular One', sans-serif;
  font-size: 1rem;
}
.exercise-header .ex-type {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-right: auto;
  background: var(--glass-bg);
  padding: 2px 10px; border-radius: var(--radius-pill);
}

/* Quiz */
.quiz-question {
  font-size: 0.95rem; margin-bottom: 16px; color: var(--text-primary);
  font-weight: 500;
}
.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.quiz-option {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}
.quiz-option:hover { border-color: var(--purple); background: rgba(133,4,162,0.08); }
.quiz-option.selected { border-color: var(--purple-light); background: rgba(133,4,162,0.12); }
.quiz-option.correct { border-color: var(--green); background: rgba(78,203,113,0.1); }
.quiz-option.incorrect { border-color: var(--pink); background: rgba(232,100,124,0.1); }
.quiz-option .opt-marker {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; flex-shrink: 0;
  transition: var(--transition);
}
.quiz-option.selected .opt-marker { border-color: var(--purple-light); background: var(--purple); color: white; }
.quiz-option.correct .opt-marker { border-color: var(--green); background: var(--green); color: white; }
.quiz-option.incorrect .opt-marker { border-color: var(--pink); background: var(--pink); color: white; }

.quiz-feedback {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  margin-bottom: 16px;
  display: none;
}
.quiz-feedback.show { display: block; animation: fadeIn 0.3s ease; }
.quiz-feedback.correct { background: rgba(78,203,113,0.1); border: 1px solid rgba(78,203,113,0.2); color: var(--green); }
.quiz-feedback.incorrect { background: rgba(232,100,124,0.1); border: 1px solid rgba(232,100,124,0.2); color: var(--pink); }

/* Calculator Exercise */
.calc-exercise {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
@media (max-width: 600px) { .calc-exercise { grid-template-columns: 1fr; } }

.calc-input-group { display: flex; flex-direction: column; gap: 6px; }
.calc-input-group label { font-size: 0.82rem; color: var(--text-secondary); }
.calc-input-group input {
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid rgba(201, 102, 232, 0.35);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Heebo', sans-serif;
  font-size: 1rem;
  direction: ltr; text-align: center;
}
.calc-input-group input:focus { outline: none; border-color: var(--purple); }
.calc-input-group input:focus-visible { outline: 2px solid rgba(201,102,232,0.6); outline-offset: 2px; }

.calc-result {
  grid-column: 1 / -1;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 20px; text-align: center;
  display: none;
}
.calc-result.show { display: block; animation: fadeIn 0.3s ease; }
.calc-result .result-num {
  font-family: 'Secular One', sans-serif;
  font-size: 2.5rem; color: var(--gold);
}
.calc-result .result-label { font-size: 0.85rem; color: var(--text-secondary); }

/* Reveal / Spoiler */
.spoiler-block {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden; margin-bottom: 16px;
}
.spoiler-toggle {
  width: 100%; padding: 14px 18px;
  background: none; border: none;
  color: var(--text-primary); cursor: pointer;
  display: flex; align-items: center; gap: 8px;
  font-family: 'Heebo', sans-serif; font-size: 0.9rem;
  transition: var(--transition);
}
.spoiler-toggle:hover { background: rgba(133,4,162,0.06); }
.spoiler-toggle .arrow { transition: transform 0.3s ease; }
.spoiler-toggle.open .arrow { transform: rotate(90deg); }
.spoiler-content {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 18px;
}
.spoiler-content.open { max-height: 2000px; padding: 0 18px 18px; }

/* ─── Navigation Buttons ─── */
.lesson-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 32px 0; border-top: 1px solid var(--glass-border);
  margin-top: 40px;
}
.lesson-nav .btn { min-width: 140px; }

/* Mobile sidebar toggle */
.sidebar-toggle {
  display: none;
  position: fixed; bottom: 80px; left: 16px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--purple);
  border: none; color: white; font-size: 1.2rem;
  cursor: pointer; z-index: 998;
  box-shadow: 0 4px 20px rgba(133,4,162,0.4);
}
@media (max-width: 900px) { .sidebar-toggle { display: flex; align-items: center; justify-content: center; } }

/* ─── Achievement / Completion ─── */
.completion-card {
  background: linear-gradient(135deg, rgba(133,4,162,0.12), rgba(201,102,232,0.06));
  border: 1px solid rgba(201,102,232,0.2);
  border-radius: var(--radius);
  padding: 32px; text-align: center; margin: 32px 0;
}
.completion-card .trophy { font-size: 3rem; margin-bottom: 12px; }
.completion-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.completion-card p { font-size: 0.88rem; }

/* Score Badge */
.score-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #0a0a1e; padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-family: 'Secular One', sans-serif;
  font-size: 0.9rem;
}

/* ─── Animations ─── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
.animate-in { animation: fadeIn 0.4s ease forwards; }

/* ─── Print ─── */
@media print {
  .lesson-sidebar, .sidebar-toggle, .lesson-nav { display: none !important; }
  .lesson-main { max-width: 100%; padding: 0; }
  body { background: white; color: black; }
}