/* ════════════════════════════════════════════════════════
   SINIF KARTLARI — ortak
   LAB ve Video Konu Anlatımları sayfaları bu dosyayı paylaşır.
   Kurallar lab.css'ten TAŞINDI (kopyalanmadı); kart görünümü tek
   kaynaktan gelir. lab.css'e LAB'a özel genel kurallar (logo rozeti,
   sınıf bandını gizleme) kaldığı için o dosya video sayfasında
   yüklenemez — ortak dosyanın var olma sebebi bu.
   Değişkenler .dnz-lab üzerinde tanımlı; o sarmalayıcının olmadığı
   sayfalar için var() içinde yedek değer var.
   ════════════════════════════════════════════════════════ */
.lab-grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 18px; }
@media (max-width: 640px) {
  .lab-grades { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}
.lab-grade {
  display: flex; align-items: center; gap: 10px; padding: 11px 12px; font-family: inherit;
  border: 1px solid var(--lab-line, #E9E9EF); border-radius: var(--lab-radius, 14px); background: #fff;
  cursor: pointer; text-align: left; transition: border-color .15s, background .15s;
}
.lab-grade:hover { border-color: #D5D5E0; }
.lab-grade[aria-pressed="true"], .lab-grade[aria-current="page"] { border-color: var(--lab-brand, #E23B32); background: #FFF8F7; }
.lab-grade-num {
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 14.5px; color: #fff; flex-shrink: 0;
}
.lab-grade-txt { display: block; min-width: 0; }
.lab-grade-lab { display: block; font-size: 13.5px; font-weight: 700; line-height: 1.2; }
.lab-grade-meta { display: block; font-size: 11.5px; color: var(--lab-ink-3, #8E8E9C); }
.lab-grade-zone {
  position: relative;
  padding: 28px 22px 26px;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid #e8eff4;
}
.lab-grade-zone-inner { max-width: 1240px; margin: 0 auto; }
.lab-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 17px;
}
.lab-section-kicker {
  display: block;
  margin-bottom: 4px;
  color: #0f96a5;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 1.5px;
}
.lab-section-head h2 {
  margin: 0;
  color: #122135;
  font-size: clamp(22px, 2.5vw, 31px);
  line-height: 1.12;
  letter-spacing: -.8px;
}
.lab-section-head p { margin: 5px 0 0; color: #718094; font-size: 13px; }
.lab-section-hint { color: #7a8998; font-size: 12px; font-weight: 700; white-space: nowrap; }
.lab-grades {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 13px;
  margin: 0;
}
.lab-grade {
  --grade: var(--lab-brand, #E23B32);
  position: relative;
  min-height: 108px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 18px 18px 17px 20px;
  border: 1px solid color-mix(in srgb, var(--grade) 18%, #e7edf2);
  border-radius: 18px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--grade) 9%, #fff) 0%, #fff 76%);
  box-shadow: 0 8px 24px rgba(23,52,84,.055);
  color: #152338;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
@supports not (color: color-mix(in srgb, red, blue)) {
  .lab-grade { border-color: #e6ebf0; background: #fff; }
}
.lab-grade::before {
  content: "";
  position: absolute;
  width: 100px;
  height: 100px;
  right: -28px;
  bottom: -44px;
  border-radius: 50%;
  background: var(--grade);
  opacity: .07;
}
.lab-grade:hover { transform: translateY(-3px); border-color: var(--grade); box-shadow: 0 15px 30px rgba(23,52,84,.11); }
.lab-grade[aria-pressed="true"], .lab-grade[aria-current="page"] {
  border-color: var(--grade);
  background: linear-gradient(135deg, color-mix(in srgb, var(--grade) 14%, #fff), #fff 78%);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--grade) 14%, transparent), 0 15px 30px rgba(23,52,84,.1);
}
.lab-grade-copy { position: relative; z-index: 2; display: block; }
.lab-grade-lab { display: block; color: var(--grade); font-size: 19px; font-weight: 900; line-height: 1.1; letter-spacing: -.45px; }
.lab-grade-meta { display: block; margin-top: 5px; color: #69798d; font-size: 12px; font-weight: 650; }
.lab-grade-enter {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--grade);
  color: #fff;
  font-size: 15px;
  font-weight: 900;
  box-shadow: 0 5px 12px color-mix(in srgb, var(--grade) 22%, transparent);
}
.lab-grade-flask { position: relative; z-index: 1; flex: 0 0 64px; color: var(--grade); opacity: .95; transform: translateY(3px); }
.lab-grade-flask svg { display: block; width: 64px; height: 78px; filter: drop-shadow(0 5px 7px rgba(23,52,84,.08)); }
@media (max-width: 720px) {
  .lab-grade-zone { padding: 22px 14px 20px; }
  .lab-section-head { align-items: flex-start; }
  .lab-section-hint { display: none; }
  .lab-grades { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .lab-grade { min-height: 96px; padding: 14px 12px 13px 14px; border-radius: 15px; }
  .lab-grade-lab { font-size: 16px; }
  .lab-grade-flask { flex-basis: 49px; }
  .lab-grade-flask svg { width: 49px; height: 61px; }
}
@media (max-width: 480px) {
  .lab-grade { min-height: 91px; }
  .lab-grade-meta { font-size: 10.5px; }
  .lab-grade-enter { width: 23px; height: 23px; margin-top: 8px; font-size: 13px; }
}
.lab-grade-zone { padding-top: 32px; padding-bottom: 30px; }
.lab-grade { min-height: 126px; padding: 20px 20px 18px 22px; border-radius: 20px; }
.lab-grade::before { width: 138px; height: 138px; right: -35px; bottom: -70px; opacity: .10; }
.lab-grade-lab { font-size: 22px; }
.lab-grade-meta { font-size: 12.5px; }
.lab-grade-enter { width: 30px; height: 30px; font-size: 16px; }
.lab-grade-flask { flex-basis: 78px; }
.lab-grade-flask svg { width: 78px; height: 94px; }
@media (max-width:720px) {
  .lab-grade { min-height: 104px; }
}

/* ── Telefon: son söz ──
   Yukarıdaki koşulsuz boyut kuralı (22px başlık, 78px simge) telefon
   kırılımını eziyordu; yarım genişlikteki kartta "5. / Sınıf" iki satıra
   bölünüyor, sağdaki kartlarda simge kenardan taşıyordu. */
@media (max-width: 520px) {
  .lab-grade { min-height: 96px; padding: 14px 10px 13px 14px; gap: 8px; }
  .lab-grade-copy { min-width: 0; }
  .lab-grade-lab { font-size: 18px; white-space: nowrap; }
  .lab-grade-meta { font-size: 11px; white-space: nowrap; }
  .lab-grade-flask { flex: 0 0 44px; }
  .lab-grade-flask svg { width: 44px; height: 54px; }
}
@media (max-width: 360px) {
  .lab-grade-lab { font-size: 16px; }
  .lab-grade-flask { flex-basis: 38px; }
  .lab-grade-flask svg { width: 38px; height: 47px; }
}