/* =========================================================
   BioOyun - Ana Stil Dosyası
   Koyu tema + laboratuvar havası (yeşil & mavi accent)
   Tailwind CDN'i tamamlar, özel bileşenleri içerir.
   ========================================================= */

:root {
  --bg-900: #0a0f1a;      /* en koyu arka plan */
  --bg-800: #0f1626;      /* panel arka planı */
  --bg-700: #16203a;      /* kart arka planı */
  --border: #243049;      /* kenarlık */
  --accent-green: #22d3a8; /* laboratuvar yeşili */
  --accent-blue: #38bdf8;  /* laboratuvar mavisi */
  --text-100: #e7eef7;
  --text-300: #9fb0c7;
}

/* ---------- Temel ---------- */
* {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-900);
  /* Hafif laboratuvar ızgara dokusu */
  background-image:
    radial-gradient(circle at 20% 10%, rgba(56, 189, 248, 0.08), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(34, 211, 168, 0.08), transparent 40%);
  color: var(--text-100);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

/* Özel kaydırma çubuğu */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-900); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-blue); }

/* ---------- Marka / Logo ---------- */
.brand-gradient {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: linear-gradient(180deg, var(--bg-800), var(--bg-900));
  border-right: 1px solid var(--border);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  color: var(--text-300);
  transition: all 0.2s ease;
  font-weight: 500;
}
.nav-link:hover {
  background: var(--bg-700);
  color: var(--text-100);
  transform: translateX(4px);
}
.nav-link.active {
  background: linear-gradient(135deg, rgba(34, 211, 168, 0.18), rgba(56, 189, 248, 0.18));
  color: var(--text-100);
  border: 1px solid rgba(56, 189, 248, 0.35);
}

/* ---------- Kart ---------- */
.lab-card {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.lab-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-blue);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.15);
}

/* ---------- Butonlar ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  color: #07111f;
  font-weight: 700;
  border-radius: 0.75rem;
  padding: 0.6rem 1.4rem;
  transition: filter 0.2s ease, transform 0.1s ease;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:active { transform: scale(0.97); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-ghost {
  background: var(--bg-700);
  color: var(--text-100);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.6rem 1.4rem;
  font-weight: 600;
  transition: all 0.2s ease;
}
.btn-ghost:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn-ghost:disabled { opacity: 0.35; cursor: not-allowed; }

/* ---------- Ders Notu içerik tipleri ---------- */
.ders-icerik p { line-height: 1.8; color: var(--text-100); margin-bottom: 1rem; }
.ders-icerik .alt-baslik {
  color: var(--accent-green);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 1.5rem 0 0.75rem;
  border-left: 3px solid var(--accent-green);
  padding-left: 0.75rem;
}
.ders-icerik ul { list-style: none; margin-bottom: 1rem; }
.ders-icerik li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.75rem;
  line-height: 1.6;
  border-bottom: 1px dashed rgba(36, 48, 73, 0.6);
}
.ders-icerik li::before {
  content: "🔬";
  position: absolute;
  left: 0;
  top: 0.5rem;
  font-size: 0.9rem;
}

/* Bilgi kutusu */
.bilgi-kutu {
  background: rgba(34, 211, 168, 0.08);
  border: 1px solid rgba(34, 211, 168, 0.3);
  border-left: 4px solid var(--accent-green);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  color: var(--text-100);
}
.bilgi-kutu::before { content: "💡 "; }

/* Formül kutusu */
.formul-kutu {
  background: var(--bg-900);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin: 1rem 0;
  text-align: center;
  overflow-x: auto;
}

/* Tablo */
.ders-icerik table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}
.ders-icerik th {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-blue);
  padding: 0.75rem;
  text-align: left;
  border: 1px solid var(--border);
}
.ders-icerik td {
  padding: 0.75rem;
  border: 1px solid var(--border);
}
.ders-icerik tr:nth-child(even) td { background: rgba(255, 255, 255, 0.02); }

/* ---------- İlerleme çubuğu ---------- */
.progress-track {
  background: var(--bg-700);
  border-radius: 999px;
  overflow: hidden;
  height: 10px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  transition: width 0.5s ease;
}

/* ---------- Animasyonlar ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.5s ease both; }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 211, 168, 0.4); }
  50% { box-shadow: 0 0 0 12px rgba(34, 211, 168, 0); }
}
.pulse-glow { animation: pulse-glow 2s infinite; }

/* Mobil menü kapalı durumda gizle */
@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 260px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 40;
    display: none;
  }
  .sidebar-backdrop.open { display: block; }
}

/* =========================================================
   SORU & OYUN BİLEŞENLERİ
   ========================================================= */

/* ---- Genel seçenek/buton kartları ---- */
.secenek {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.9rem 1.1rem;
  margin-bottom: 0.6rem;
  color: var(--text-100);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s ease;
}
.secenek:hover:not(:disabled) {
  border-color: var(--accent-blue);
  transform: translateX(3px);
}
.secenek:disabled { cursor: default; }
.secenek.dogru {
  background: rgba(34, 211, 168, 0.18);
  border-color: var(--accent-green);
}
.secenek.yanlis {
  background: rgba(248, 113, 113, 0.15);
  border-color: #f87171;
}
.secenek.secili { border-color: var(--accent-blue); }

/* ---- Geri bildirim kutusu ---- */
.geri-bildirim {
  border-radius: 0.6rem;
  padding: 0.85rem 1rem;
  margin-top: 0.6rem;
  font-size: 0.92rem;
  line-height: 1.5;
  animation: fadeInUp 0.3s ease;
}
.geri-bildirim.basari { background: rgba(34, 211, 168, 0.12); border: 1px solid var(--accent-green); }
.geri-bildirim.hata   { background: rgba(248, 113, 113, 0.12); border: 1px solid #f87171; }

/* ---- Boşluk doldurma input ---- */
.bosluk-input {
  background: var(--bg-900);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  color: var(--text-100);
  font-size: 1rem;
  min-width: 160px;
  transition: border-color 0.2s;
}
.bosluk-input:focus { outline: none; border-color: var(--accent-blue); }
.bosluk-input.dogru { border-color: var(--accent-green); background: rgba(34,211,168,0.1); }
.bosluk-input.yanlis { border-color: #f87171; background: rgba(248,113,113,0.1); }

/* ---- Eşleştirme & sürükle-bırak ---- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.55rem 0.9rem;
  font-weight: 600;
  cursor: grab;
  user-select: none;
  transition: all 0.15s ease;
}
.chip:hover { border-color: var(--accent-blue); }
.chip.dragging { opacity: 0.4; }
.chip.yerlesti { background: rgba(56,189,248,0.12); border-color: var(--accent-blue); cursor: default; }

.drop-zone {
  min-height: 56px;
  border: 2px dashed var(--border);
  border-radius: 0.75rem;
  padding: 0.6rem;
  transition: all 0.15s ease;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.drop-zone.over { border-color: var(--accent-green); background: rgba(34,211,168,0.06); }
.drop-zone.dogru { border-color: var(--accent-green); border-style: solid; }
.drop-zone.yanlis { border-color: #f87171; border-style: solid; }

/* Eşleştirme satır seçimi (tıkla-eşleştir) */
.match-item {
  border: 1px solid var(--border);
  background: var(--bg-700);
  border-radius: 0.6rem;
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
  font-weight: 500;
}
.match-item:hover { border-color: var(--accent-blue); }
.match-item.secili { border-color: var(--accent-green); background: rgba(34,211,168,0.12); }
.match-item.eslesti { opacity: 0.55; border-color: var(--accent-green); cursor: default; }
.match-item.yanlis-flash { border-color: #f87171; animation: shake 0.4s; }

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* =========================================================
   SANAL DENEY MASASI
   ========================================================= */
.lab-bench {
  background: linear-gradient(180deg, var(--bg-800), var(--bg-900));
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem 1rem 1rem;
}

/* Deney tüpü */
.test-tube {
  position: relative;
  width: 80px;
  height: 240px;
  margin: 0 auto;
  border: 4px solid #9fb0c7;
  border-top: none;
  border-radius: 0 0 40px 40px;
  background: rgba(255,255,255,0.04);
  overflow: hidden;
  box-shadow: inset 0 0 18px rgba(0,0,0,0.4);
}
.tube-liquid {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 0%;
  background: transparent;
  transition: height 0.8s ease, background-color 1.2s ease;
}
/* Kabarcık animasyonu (ısıtma) */
.tube-liquid.kaynama::before,
.tube-liquid.kaynama::after {
  content: "";
  position: absolute;
  bottom: 8px;
  width: 8px; height: 8px;
  background: rgba(255,255,255,0.5);
  border-radius: 50%;
  animation: kabarcik 1.2s infinite ease-in;
}
.tube-liquid.kaynama::before { left: 30%; animation-delay: 0.2s; }
.tube-liquid.kaynama::after  { left: 60%; animation-delay: 0.7s; }
@keyframes kabarcik {
  0%   { transform: translateY(0) scale(0.6); opacity: 0.7; }
  100% { transform: translateY(-160px) scale(1.1); opacity: 0; }
}

/* Bunsen beki alevi */
.flame {
  width: 30px; height: 50px;
  margin: 4px auto 0;
  background: radial-gradient(circle at 50% 80%, #ffd166 0%, #ff7b00 50%, #ff3b00 100%);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  filter: blur(1px);
  opacity: 0;
  transform-origin: bottom center;
  transition: opacity 0.3s;
}
.flame.on { opacity: 1; animation: alev 0.4s infinite alternate; }
@keyframes alev {
  from { transform: scaleY(1) scaleX(1); }
  to   { transform: scaleY(1.15) scaleX(0.92); }
}

.lab-select {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.6rem 0.8rem;
  color: var(--text-100);
  width: 100%;
}
.lab-select:focus { outline: none; border-color: var(--accent-blue); }

/* Quiz zamanlayıcı */
.timer-ring {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

/* Flashcard 3D çevirme */
.flip-card { perspective: 1200px; }
.flip-inner {
  position: relative;
  width: 100%;
  min-height: 260px;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  cursor: pointer;
}
.flip-card.flipped .flip-inner { transform: rotateY(180deg); }
.flip-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
}
.flip-front { background: var(--bg-700); }
.flip-back  { background: linear-gradient(135deg, rgba(34,211,168,0.12), rgba(56,189,248,0.12)); transform: rotateY(180deg); }

/* Konfeti / kutlama */
@keyframes confetti-fall {
  to { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}
.confetti {
  position: fixed;
  top: -10px;
  width: 10px; height: 14px;
  z-index: 200;
  animation: confetti-fall linear forwards;
}

/* =========================================================
   AKTİF SEÇİM KUTUSU (Sidebar)
   ========================================================= */
.aktif-secim-kutu {
  background: linear-gradient(135deg, rgba(34,211,168,0.07), rgba(56,189,248,0.07));
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.85rem 0.9rem;
  margin-bottom: 0.5rem;
}

/* Yönetici paneli linki vurgusu */
.nav-link.nav-admin {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  color: #fda4af;
}
.nav-link.nav-admin:hover {
  background: rgba(248, 113, 113, 0.15);
  border-color: #f87171;
  color: #fff;
}
.nav-link.nav-admin.active {
  background: linear-gradient(135deg, rgba(248,113,113,0.18), rgba(56,189,248,0.18));
  border-color: rgba(248,113,113,0.5);
  color: #fff;
}

/* Seçim kartları (sınıf/tema) */
.secim-kart {
  cursor: pointer;
  border-width: 1px;
  position: relative;
}
.secim-kart:hover {
  border-color: var(--accent-green);
  box-shadow: 0 12px 30px rgba(34, 211, 168, 0.18);
}

/* =========================================================
   YÖNETİCİ PANELİ — FORM ELEMANLARI
   ========================================================= */
.lab-input {
  background: var(--bg-900);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.55rem 0.75rem;
  color: var(--text-100);
  font-size: 0.92rem;
  font-family: inherit;
  width: auto;
  transition: border-color 0.2s;
}
.lab-input:focus { outline: none; border-color: var(--accent-blue); }
textarea.lab-input { resize: vertical; min-height: 2.4rem; }

/* Admin sekme butonu (btn-primary/ghost'a ek aralık) */
#adminSekmeler .btn-primary,
#adminSekmeler .btn-ghost {
  padding: 0.5rem 1rem;
}

/* =========================================================
   ADMIN MODAL
   ========================================================= */
.admin-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 90;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 5vh 1rem 1rem;
  overflow-y: auto;
  animation: fadeInUp 0.2s ease;
}
.admin-modal {
  background: var(--bg-800);
  width: 100%;
  max-width: 560px;
  border: 1px solid var(--border);
}

/* Admin içinde küçük input-grup spacingleri */
#adminIcerik code {
  background: var(--bg-900);
  border: 1px solid var(--border);
  border-radius: 0.35rem;
  padding: 0.1rem 0.35rem;
  font-size: 0.85em;
  color: var(--accent-blue);
}

/* ---------- Ses kontrol düğmeleri (sağ alt) ---------- */
.ses-kontrol {
  position: fixed;
  right: 16px;
  bottom: 16px;
  display: flex;
  gap: 8px;
  z-index: 90;
}
.ses-kontrol button {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-700);
  border: 1px solid var(--border);
  color: var(--text-100);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.ses-kontrol button:hover {
  transform: translateY(-2px);
  border-color: var(--accent-blue);
}
.ses-kontrol button.kapali {
  opacity: 0.45;
}
.ses-kontrol button.konusuyor {
  border-color: var(--accent-green);
  animation: sesPulse 1s ease-in-out infinite;
}
@keyframes sesPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 211, 168, 0.45); }
  50%      { box-shadow: 0 0 0 9px rgba(34, 211, 168, 0); }
}
@media (max-width: 640px) {
  .ses-kontrol { right: 10px; bottom: 10px; }
  .ses-kontrol button { width: 42px; height: 42px; font-size: 1.05rem; }
}