/* ============ Reset ============ */
*, *::before, *::after { box-sizing: border-box; }
html { direction: rtl; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Amiri', serif;
  line-height: 1.9;
  color: #22303a;
  background: #eef3f7;
  font-size: 16px;
  text-align: right;
}
h1, h2, h3, h4 { font-family: 'Lemonada', sans-serif; margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============ Variables ============ */
:root {
  --primary: #146c94;
  --primary-dark: #0b3d59;
  --accent: #b1560f;
  --bg: #eef3f7;
  --bg-light: #eaf4f9;
  --card: #fbfdfe;
  --border: #dde9f1;
  --text: #22303a;
  --muted: #7a8a96;
  --success: #2e7d32;
  --warn: #e0a53b;
  --shadow-sm: 0 1px 4px rgba(11,61,89,.06);
  --shadow-md: 0 4px 14px rgba(11,61,89,.10);
  --shadow-lg: 0 8px 28px rgba(11,61,89,.14);
  --radius: 14px;
  --radius-sm: 10px;
}

/* ============ Header ============ */
.site-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 14px 20px;
  box-shadow: var(--shadow-md);
  position: sticky; top: 0; z-index: 100;
}
.site-header-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: #fff; font-family: 'Lemonada', sans-serif;
  font-weight: 700; font-size: 18px;
}
.brand-icon { font-size: 28px; }
.header-links {
  display: flex; gap: 10px; align-items: center;
  font-size: 14px;
}
.header-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 20px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff; font-weight: 600;
  transition: background .2s;
}
.header-link:hover { background: rgba(255,255,255,.25); }

/* ============ Hero ============ */
.hero {
  background: linear-gradient(135deg, #f8fbfd, #eaf4f9);
  padding: 60px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero-title {
  font-size: clamp(26px, 5vw, 42px);
  color: var(--primary-dark);
  margin-bottom: 12px;
  font-weight: 800;
}
.hero-subtitle {
  font-size: clamp(15px, 2vw, 19px);
  color: var(--primary);
  margin-bottom: 24px;
  font-weight: 600;
}
.hero-stats {
  display: flex; justify-content: center; gap: 30px;
  flex-wrap: wrap; margin-top: 24px;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-family: 'Lemonada', sans-serif;
  font-size: 28px; font-weight: 900;
  color: var(--primary-dark);
  display: block;
}
.hero-stat-label { font-size: 13px; color: var(--muted); }

/* ============ Filters ============ */
.filters {
  max-width: 1200px; margin: 30px auto 0;
  padding: 0 20px;
  display: flex; flex-wrap: wrap; gap: 12px;
  align-items: center; justify-content: center;
}
.filter-group { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-btn {
  padding: 9px 18px; border-radius: 22px;
  border: 2px solid var(--border);
  background: var(--card); color: var(--primary-dark);
  font-family: 'Lemonada', sans-serif;
  font-weight: 600; font-size: 13.5px;
  cursor: pointer; transition: all .2s;
}
.filter-btn:hover { border-color: var(--primary); transform: translateY(-1px); }
.filter-btn.active {
  background: var(--primary); color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ============ Lessons Grid ============ */
.lessons-section {
  max-width: 1200px; margin: 30px auto;
  padding: 0 20px 60px;
}
.section-title {
  font-size: 22px; color: var(--primary-dark);
  margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.section-title::before {
  content: ''; width: 6px; height: 26px;
  background: var(--primary); border-radius: 3px;
}
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.lesson-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
  display: flex; flex-direction: column;
  cursor: pointer;
}
.lesson-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.lesson-card-head {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff; padding: 18px 20px;
  position: relative;
}
.lesson-card-num {
  position: absolute; top: 14px; left: 16px;
  background: rgba(255,255,255,.2);
  padding: 3px 10px; border-radius: 12px;
  font-size: 12px; font-weight: 700;
}
.lesson-card-title {
  font-family: 'Lemonada', sans-serif;
  font-size: 17px; font-weight: 700;
  line-height: 1.6; margin-bottom: 6px;
  padding-left: 55px;
}
.lesson-card-meta {
  font-size: 12.5px; opacity: .9;
  display: flex; gap: 10px; flex-wrap: wrap;
}
.lesson-card-body {
  padding: 16px 20px;
  display: flex; flex-direction: column;
  gap: 10px; flex: 1;
}
.lesson-card-tags {
  display: flex; gap: 6px; flex-wrap: wrap;
}
.tag {
  font-size: 11.5px; padding: 3px 10px;
  border-radius: 12px;
  background: var(--bg-light); color: var(--primary-dark);
  border: 1px solid var(--border); font-weight: 600;
}
.lesson-card-footer {
  margin-top: auto; display: flex; gap: 8px;
}
.btn {
  flex: 1; text-align: center;
  padding: 10px 16px; border-radius: var(--radius-sm);
  font-family: 'Lemonada', sans-serif;
  font-weight: 700; font-size: 14px;
  cursor: pointer; border: none;
  transition: all .2s;
  display: inline-flex; align-items: center;
  justify-content: center; gap: 6px;
}
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ============ Loading & Empty ============ */
.loading, .empty {
  text-align: center; padding: 60px 20px;
  color: var(--muted); font-size: 16px;
  grid-column: 1 / -1;
}
.spinner {
  display: inline-block; width: 42px; height: 42px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 14px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ Lesson Page ============ */
.lesson-page-wrap {
  max-width: 1100px; margin: 0 auto;
  padding: 30px 20px 80px;
}
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--primary); font-weight: 700;
  padding: 8px 16px; border-radius: 20px;
  background: var(--card); border: 1px solid var(--border);
  margin-bottom: 20px; transition: all .2s;
  font-size: 14px;
}
.back-link:hover { background: var(--primary); color: #fff; }

.lesson-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff; border-radius: var(--radius);
  padding: 30px 28px; margin-bottom: 24px;
  box-shadow: var(--shadow-md);
}
.lesson-hero-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800; margin-bottom: 14px;
  line-height: 1.5;
}
.lesson-hero-meta {
  display: flex; flex-wrap: wrap;
  gap: 10px; font-size: 13.5px;
}
.lesson-hero-meta span {
  background: rgba(255,255,255,.18);
  padding: 5px 14px; border-radius: 20px;
  border: 1px solid rgba(255,255,255,.25);
  font-weight: 600;
}

/* ============ Tabs ============ */
.tabs {
  display: flex; gap: 8px;
  background: var(--card);
  padding: 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
  overflow-x: auto;
}
.tab-btn {
  flex: 1; min-width: 140px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  border: none; background: transparent;
  color: var(--primary-dark);
  font-family: 'Lemonada', sans-serif;
  font-weight: 700; font-size: 15px;
  cursor: pointer; transition: all .2s;
  display: inline-flex; align-items: center;
  justify-content: center; gap: 8px;
  white-space: nowrap;
}
.tab-btn:hover { background: var(--bg-light); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* ============ Content Frame ============ */
.content-frame-wrap {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  min-height: 400px;
  position: relative;
}
.content-frame {
  width: 100%; border: none;
  display: block; min-height: 400px;
  background: #fff;
}
.frame-loading {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: #fff; color: var(--muted);
  gap: 10px;
}
.frame-loading.hidden { display: none; }

/* ============ CTA Banner ============ */
.cta-banner {
  margin-top: 30px;
  background: linear-gradient(135deg, #fff7e6, #fef0d3);
  border: 2px dashed var(--warn);
  border-radius: var(--radius);
  padding: 24px 26px;
  text-align: center;
}
.cta-banner-title {
  font-family: 'Lemonada', sans-serif;
  font-size: 18px; font-weight: 800;
  color: var(--accent); margin-bottom: 10px;
}
.cta-banner-text {
  color: #6b5b1e; margin-bottom: 18px;
  font-size: 15px;
}
.cta-buttons {
  display: flex; gap: 10px; justify-content: center;
  flex-wrap: wrap;
}
.cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 24px;
  font-family: 'Lemonada', sans-serif;
  font-weight: 700; font-size: 14.5px;
  color: #fff; transition: all .2s;
  border: none; cursor: pointer;
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.cta-btn-tg { background: #229ED9; }
.cta-btn-wa { background: #25D366; }
.cta-btn-pdf { background: var(--accent); }

/* ============ Footer ============ */
.site-footer {
  background: var(--primary-dark);
  color: #cfe3ee;
  padding: 30px 20px;
  text-align: center;
  font-size: 13.5px;
}
.site-footer strong { color: #fff; }
.site-footer a { color: #8fd3f4; }

/* ============ Responsive ============ */
@media (max-width: 600px) {
  .hero { padding: 40px 16px; }
  .lesson-card-title { font-size: 15.5px; padding-left: 0; }
  .lesson-card-num { position: static; display: inline-block; margin-bottom: 8px; }
  .tab-btn { font-size: 13.5px; padding: 12px 14px; min-width: 120px; }
  .lesson-hero { padding: 22px 18px; }
}