/* ==========================================================================
   COMPONENTS.CSS - Navigation, Drawer Menu, Badges, Tabs, Code, Toasts
   ========================================================================== */

/* Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.25rem;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
  color: var(--accent-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Hamburger Button */
.hamburger-btn {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  cursor: pointer;
  transition: background 0.2s ease;
}

.hamburger-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
}

.hamburger-icon {
  width: 24px;
  height: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.hamburger-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger-btn.active .hamburger-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger-btn.active .hamburger-icon span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn.active .hamburger-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  z-index: 1100;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.drawer-link:hover, .drawer-link.active {
  color: var(--accent-cyan);
  background: var(--bg-card-hover);
}

/* Modullar soni (hozir 9 ta) endi har qanday oyna kengligida bitta
   qatorga sig'maydi — shu sabab tor va keng ekranlarda bir xil
   ko'rinish uchun to'liq matnli nav-links doim yashirilgan, o'rniga
   barcha o'lchamlarda hamburger + drawer navigatsiyasi ishlatiladi. */
.nav-links { display: none; }
.hamburger-btn { display: flex; }

/* ==========================================================================
   lecture6.html / lecture7.html'da ishlatilgan muqobil sinf nomlari.
   Bular .site-header / .brand-logo / .mobile-drawer-overlay / .container /
   .section-header bilan bir xil ko'rinish va xatti-harakat berish uchun
   qo'shildi (avval bu sinflar hech qanday CSS qoidasiga ega emas edi —
   natijada navigatsiya paneli shaffof va sticky bo'lmagan, logotip
   tekislanmagan, drawer orqa foni ko'rinmas edi).
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.nav-logo-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.nav-logo-text {
  white-space: nowrap;
}

/* Hamburger tugmasi ichida to'g'ridan-to'g'ri <span> (o'rovchi
   .hamburger-icon'siz) ishlatilgan hollar uchun */
.hamburger-btn > span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  margin: 5px 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger-btn.active > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.active > span:nth-child(2) { opacity: 0; }
.hamburger-btn.active > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.drawer-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.drawer-close {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 1.3rem;
  line-height: 1;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.drawer-close:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
}

.main-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 40px 24px 90px;
}

.hero-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .main-container { padding: 24px 16px 60px; }
  .hero-panel { padding: 18px; }
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.badge-cyan { background: rgba(56, 189, 248, 0.12); color: var(--accent-cyan); border-color: rgba(56, 189, 248, 0.3); }
.badge-emerald { background: rgba(52, 211, 153, 0.12); color: var(--accent-emerald); border-color: rgba(52, 211, 153, 0.3); }
.badge-amber { background: rgba(251, 191, 36, 0.12); color: var(--accent-amber); border-color: rgba(251, 191, 36, 0.3); }
.badge-rose { background: rgba(244, 63, 94, 0.12); color: var(--accent-rose); border-color: rgba(244, 63, 94, 0.3); }
.badge-purple { background: rgba(192, 132, 252, 0.12); color: var(--accent-purple); border-color: rgba(192, 132, 252, 0.3); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s ease;
  min-width: 0; /* flex qatordagi tugmalar tor ekranda siqilishi mumkin bo'lsin */
}

.btn-primary {
  background: var(--gradient-brand);
  color: #090D16;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  color: var(--accent-cyan);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 1rem;
  padding: 10px 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Code Snippet Block */
.code-block {
  background: #0B1120;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 16px 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(15, 23, 42, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.code-content {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #E2E8F0;
  line-height: 1.5;
  overflow-x: auto;
}

/* Toast Notification */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-cyan);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  animation: toastSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes toastSlideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Quiz Option Cards */
.quiz-option-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.92rem;
  color: var(--text-main);
}

.quiz-option-card:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.4);
}

.quiz-option-card.selected {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.25);
}

@media (max-width: 768px) {
  .tab-btn {
    padding: 8px 12px;
    font-size: 0.9rem;
  }
  .code-content {
    padding: 12px;
    font-size: 0.8rem;
  }
  .btn {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
}

@media (max-width: 400px) {
  .nav-actions .btn {
    display: none;
  }
}

@media (max-width: 480px) {
  .tabs-nav {
    gap: 4px;
    margin-bottom: 16px;
  }
  .tab-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  .badge {
    font-size: 0.72rem;
    padding: 3px 9px;
  }
  .code-block {
    margin: 12px 0;
  }
  .code-header {
    padding: 8px 12px;
    font-size: 0.75rem;
  }
  .code-content {
    padding: 10px;
    font-size: 0.74rem;
  }
  .btn {
    padding: 7px 14px;
    font-size: 0.82rem;
  }
  .quiz-option-card {
    padding: 10px;
    font-size: 0.85rem;
  }
}

/* ==========================================================================
   lecture10.html'da ishlatilgan muqobil sinf nomlari (.card, .citation-box,
   .sim-canvas-container, .footer va h.k.) — bu sinflar hech qanday CSS
   qoidasiga ega emas edi, natijada butun sahifa uslubsiz, oddiy matn
   ko'rinishida chiqardi (kartalar fon/chegara/boshliqsiz, iqtibos
   qutilar ajratilmagan, footer stilsiz).
   ========================================================================== */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
}

.citation-box {
  background: rgba(56, 189, 248, 0.05);
  border-left: 4px solid var(--accent-cyan);
  padding: 14px 18px;
  border-radius: 8px;
  margin: 20px 0;
}

.citation-title {
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.citation-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  overflow-wrap: break-word;
}

.citation-link {
  color: var(--accent-cyan);
  text-decoration: underline;
  overflow-wrap: break-word;
  word-break: break-all;
}

.sim-canvas-container {
  margin-bottom: 8px;
}

.astro-preset-btn.active,
.lms-topic-btn.active,
.lms-cluster-btn.active,
.mech-mode-btn.active,
.termo-mode-btn.active,
.electro-mode-btn.active,
.nuclear-mode-btn.active {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

/* Scrollable tabs nav (prev/next arrows + progress track) */
.tabs-scroll-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.tabs-scroll-wrapper .tabs-nav {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
  scrollbar-width: none;
}

.tabs-scroll-wrapper .tabs-nav::-webkit-scrollbar {
  display: none;
}

.tabs-scroll-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.tabs-scroll-btn:hover {
  color: var(--text-main);
  border-color: var(--accent-cyan);
}

.tabs-scroll-btn:disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.tabs-scroll-track-container {
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  margin-bottom: 24px;
  overflow: hidden;
}

.tabs-scroll-thumb {
  height: 100%;
  width: 30%;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.astro-telemetry-hud {
  position: absolute;
  top: 10px;
  left: 10px;
  max-width: calc(100% - 20px);
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(56, 189, 248, 0.3);
  font-family: monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  color: #E2E8F0;
  pointer-events: none;
}

.astro-telemetry-hud .hud-title {
  color: var(--accent-cyan);
  font-weight: bold;
  margin-bottom: 4px;
}

@media (max-width: 640px) {
  /* Kichik ekranlarda HUD paneli butun 3D sahnani to'sib qo'ymasligi uchun ixchamlashtiriladi */
  .astro-telemetry-hud {
    top: 6px;
    left: 6px;
    padding: 5px 8px;
    font-size: 0.58rem;
    line-height: 1.3;
    border-radius: 8px;
    max-width: calc(100% - 12px);
  }
  .astro-telemetry-hud .hud-title {
    margin-bottom: 2px;
  }
}

.footer {
  border-top: 1px solid var(--border-color);
  padding: 30px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-container,
.footer-content {
  max-width: 1360px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .card { padding: 18px; }
  .card-title { font-size: 1.2rem; }
}

/* Navigatsiya paneli ichidagi logotip va tugmalar ekran chetiga yopishmasligi uchun */
.navbar .nav-container { max-width: 1360px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .navbar .nav-container { padding: 0 16px; } }

/* Tor ekranda (≤ 420 px) logotip matni menyu tugmasini ekrandan chiqarib yubormasligi uchun */
@media (max-width: 420px) {
  .brand-logo { font-size: 1rem; gap: 8px; }
  .brand-logo svg { width: 26px; height: 26px; }
}