/**
 * Navigation System — v2
 * Dr. İzzet İNCE | izzetince.com.tr
 * Desktop: horizontal + dropdowns + mega-menu
 * Mobile: slide-in sidebar + accordion
 */

/* ══════════════════════════════════════
   BRAND
══════════════════════════════════════ */
.nav-brand-text {
  display: none;
}

.nav-brand-name {
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 600;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.2px;
}

.navbar .site-nav-container,
.navbar .nav-container {
  width: min(1280px, 96%) !important;
  max-width: 1280px !important;
}

/* ══════════════════════════════════════
   NAV ITEMS (desktop)
══════════════════════════════════════ */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-item {
  position: relative;
  --nav-submenu-shift: 0px;
}

.nav-item > a {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease, background 160ms ease;
  position: relative;
}

.nav-item > a .nav-icon {
  font-size: 12px;
  opacity: 0.75;
  flex-shrink: 0;
}

.nav-item > a .nav-chevron {
  font-size: 9px;
  opacity: 0.45;
  margin-left: 1px;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-item > a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-item > a:hover .nav-chevron {
  opacity: 0.85;
}

.nav-item.has-dropdown:hover > a .nav-chevron {
  transform: rotate(180deg);
  opacity: 0.9;
}

/* Active state — sadece parlak beyaz + küçük nokta */
.nav-item > a.active {
  color: var(--text);
  font-weight: 600;
}

.nav-item > a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brand);
}

/* ══════════════════════════════════════
   SIMPLE DROPDOWN (Akademik, Keşfet)
══════════════════════════════════════ */
.simple-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(calc(-50% + var(--nav-submenu-shift, 0px))) translateY(8px);
  min-width: 260px;
  background: rgba(8, 13, 12, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(17, 153, 142, 0.2);
  border-radius: 14px;
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 200;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
}

/* Arrow tip */
.simple-dropdown::before {
  content: '';
  position: absolute;
  top: -7px;
  left: calc(50% - var(--nav-submenu-shift, 0px));
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-bottom-color: rgba(17, 153, 142, 0.25);
  border-top: none;
}

.nav-item.has-dropdown:hover .simple-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(calc(-50% + var(--nav-submenu-shift, 0px))) translateY(0);
}

.simple-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 13px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  border-radius: 9px;
  text-decoration: none;
  transition: color 0.18s, background 0.18s, transform 0.18s;
  white-space: nowrap;
}

.simple-dropdown a i {
  width: 16px;
  text-align: center;
  color: var(--brand);
  font-size: 11px;
  flex-shrink: 0;
}

.simple-dropdown a:hover {
  color: var(--text);
  background: rgba(17, 153, 142, 0.09);
  transform: translateX(3px);
}

.simple-dropdown .dropdown-divider {
  height: 1px;
  background: rgba(17, 153, 142, 0.1);
  margin: 4px 6px;
}

/* ══════════════════════════════════════
   RICH DROPDOWN CARDS (sd-card)
══════════════════════════════════════ */
.sd-card {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 13px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
  margin-bottom: 2px;
}

.sd-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: rgba(17, 153, 142, 0.12);
  background: color-mix(in srgb, var(--sd-c, #11998e) 16%, transparent);
  color: var(--brand);
  color: var(--sd-c, var(--brand));
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.sd-content {
  flex: 1;
  min-width: 0;
}

.sd-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1.3;
}

.sd-desc {
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
  line-height: 1.3;
}

.sd-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--brand);
  background: rgba(17, 153, 142, 0.12);
  border-radius: 5px;
  padding: 1px 5px;
  flex-shrink: 0;
}

.sd-card:hover {
  background: rgba(17, 153, 142, 0.07);
  background: color-mix(in srgb, var(--sd-c, #11998e) 9%, transparent);
  border-color: rgba(17, 153, 142, 0.22);
  border-color: color-mix(in srgb, var(--sd-c, #11998e) 32%, transparent);
  transform: translateY(-2px);
}

.sd-card:hover .sd-icon {
  transform: scale(1.08);
  box-shadow: 0 6px 16px -6px var(--sd-c, rgba(17, 153, 142, 0.6));
}

/* ── Performans Merkezi: 2 sütunlu premium grid ── */
.simple-dropdown.pm-grid {
  min-width: 580px;
  max-width: 92vw;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 10px;
}

.simple-dropdown.pm-grid .pm-head {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 10px;
  margin-bottom: 2px;
  border-bottom: 1px solid rgba(17, 153, 142, 0.14);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand);
}

.simple-dropdown.pm-grid .pm-head i {
  font-size: 12px;
}

@media (max-width: 720px) {
  .simple-dropdown.pm-grid {
    grid-template-columns: 1fr;
    min-width: 280px;
  }
}

/* Nav count chips on nav items */
.nav-count {
  font-size: 9px;
  font-weight: 700;
  color: var(--brand);
  background: rgba(17, 153, 142, 0.1);
  border: 1px solid rgba(17, 153, 142, 0.2);
  border-radius: 6px;
  padding: 1px 4px;
  line-height: 1.4;
  flex-shrink: 0;
}

@media (max-width: 1440px) and (min-width: 1101px) {
  .navbar .nav-menu {
    gap: 0 !important;
  }

  .navbar .nav-brand {
    gap: 8px !important;
  }

  .navbar .nav-brand-name {
    font-size: 12px !important;
  }

  .navbar .nav-menu > .nav-item > a {
    gap: 4px !important;
    padding: 8px 7px !important;
    font-size: 12px !important;
  }

  .navbar .nav-menu > .nav-item > a .nav-chevron {
    font-size: 8px !important;
    margin-left: 0 !important;
  }

  .navbar .nav-count,
  .navbar .nav-badge {
    display: none;
  }

  .navbar .nav-cta {
    padding: 7px 11px !important;
  }
}

@media (max-width: 1180px) and (min-width: 1101px) {
  .navbar .nav-brand-name {
    display: none;
  }
}

/* ══════════════════════════════════════
   MEGA MENU (Eğitim)
══════════════════════════════════════ */
.mega-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(calc(-50% + var(--nav-submenu-shift, 0px))) translateY(8px);
  min-width: 720px;
  max-width: calc(100vw - 32px);
  background: rgba(8, 13, 12, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(17, 153, 142, 0.2);
  border-radius: 16px;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 200;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.mega-menu::before {
  content: '';
  position: absolute;
  top: -7px;
  left: calc(50% - var(--nav-submenu-shift, 0px));
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-bottom-color: rgba(17, 153, 142, 0.25);
  border-top: none;
}

.nav-item.has-dropdown:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(calc(-50% + var(--nav-submenu-shift, 0px))) translateY(0);
}

/* Legacy top-level exams item is folded into the lessons mega-menu */
.nav-menu > .nav-item.has-dropdown:has(> a[href="dersler/sinavlar/index.html"]),
.nav-menu > .nav-item.has-dropdown:has(> a[href="../dersler/sinavlar/index.html"]) {
  display: none;
}

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.mega-menu-section {
  padding: 4px;
}

.mega-menu-section h4 {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--brand);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(17, 153, 142, 0.15);
}

.mega-menu-card {
  display: flex;
  gap: 11px;
  padding: 10px 12px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  text-decoration: none;
  margin-bottom: 4px;
}

.mega-menu-card:hover {
  background: rgba(17, 153, 142, 0.08);
  border-color: rgba(17, 153, 142, 0.18);
  transform: translateX(3px);
}

.mega-menu-card-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: white;
  font-size: 14px;
  flex-shrink: 0;
}

.mega-menu-card-content {
  flex: 1;
  min-width: 0;
}

.mega-menu-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.mega-menu-card-desc {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mega-menu-card-badge {
  font-size: 9px;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(17, 153, 142, 0.15);
  color: var(--brand);
  margin-left: 6px;
  font-weight: 600;
}

.mega-menu-footer {
  grid-column: 1 / -1;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(17, 153, 142, 0.12);
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mega-menu-footer a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #060c0b;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.mega-menu-footer a:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(17, 153, 142, 0.35);
}

.mega-menu-highlight {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.9fr);
  gap: 16px;
  align-items: stretch;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid rgba(231, 76, 60, 0.26);
  background:
    radial-gradient(circle at top left, rgba(231, 76, 60, 0.18), transparent 42%),
    radial-gradient(circle at bottom right, rgba(102, 126, 234, 0.15), transparent 48%),
    linear-gradient(135deg, rgba(13, 18, 34, 0.98), rgba(10, 14, 26, 0.94));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.mega-menu-highlight-copy h4 {
  margin: 0 0 6px;
  padding: 0;
  border: 0;
  color: #ff8d80;
  font-size: 15px;
  letter-spacing: 0.15px;
  text-transform: none;
}

.mega-menu-highlight-copy p {
  margin: 0;
  color: rgba(160, 174, 192, 0.9);
  font-size: 12px;
  line-height: 1.6;
}

.mega-menu-highlight-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.mega-menu-highlight-link {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-width: 0;
  padding: 14px 15px;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.mega-menu-highlight-link:hover {
  transform: translateY(-2px);
  border-color: rgba(231, 76, 60, 0.34);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

.mega-menu-highlight-link.primary {
  background: linear-gradient(135deg, rgba(231, 76, 60, 0.2), rgba(192, 57, 43, 0.1));
}

.mega-menu-highlight-link.secondary {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.16), rgba(118, 75, 162, 0.1));
}

.mega-menu-highlight-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  color: #fff;
  font-size: 15px;
  box-shadow: 0 10px 22px rgba(231, 76, 60, 0.28);
}

.mega-menu-highlight-link.secondary .mega-menu-highlight-icon {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.mega-menu-highlight-text {
  min-width: 0;
  flex: 1;
}

.mega-menu-highlight-title {
  color: #f5f7ff;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
  white-space: normal;
  overflow-wrap: anywhere;
}

.mega-menu-highlight-desc {
  color: rgba(160, 174, 192, 0.88);
  font-size: 11px;
  line-height: 1.5;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* ══════════════════════════════════════
   NAV CTA BUTTON (İletişim) — outline
══════════════════════════════════════ */
.nav-cta {
  border: 1.5px solid rgba(17, 153, 142, 0.5) !important;
  color: var(--brand) !important;
  font-weight: 600 !important;
  padding: 7px 15px !important;
  border-radius: 10px !important;
  background: transparent !important;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease !important;
}

.nav-cta:hover {
  border-color: var(--brand) !important;
  background: rgba(17, 153, 142, 0.1) !important;
  color: var(--brand) !important;
}

/* ══════════════════════════════════════
   BADGES
══════════════════════════════════════ */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 6px;
  font-size: 9px;
  font-weight: 700;
  background: linear-gradient(135deg, #FF6B6B, #ff5252);
  color: white;
  border-radius: 4px;
  margin-left: 4px;
  text-transform: uppercase;
}

.nav-badge.new {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* ══════════════════════════════════════
   BREADCRUMBS
══════════════════════════════════════ */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}

.breadcrumbs a { color: var(--muted); transition: color 0.2s; text-decoration: none; }
.breadcrumbs a:hover { color: var(--brand); }
.breadcrumbs .separator { color: var(--outline); }
.breadcrumbs .current { color: var(--text); font-weight: 500; }

/* ══════════════════════════════════════
   COURSE SIDEBAR
══════════════════════════════════════ */
.course-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  min-height: calc(100vh - 200px);
}

.course-sidebar {
  position: sticky;
  top: 80px;
  height: fit-content;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 16px;
}

.course-sidebar::-webkit-scrollbar { width: 4px; }
.course-sidebar::-webkit-scrollbar-track { background: var(--bg-soft); border-radius: 2px; }
.course-sidebar::-webkit-scrollbar-thumb { background: var(--brand); border-radius: 2px; }

.sidebar-header {
  padding: 16px;
  background: linear-gradient(135deg, var(--card), rgba(17, 153, 142, 0.05));
  border: 1px solid var(--outline);
  border-radius: 12px;
  margin-bottom: 16px;
}

.sidebar-header h3 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.sidebar-header p { font-size: 12px; color: var(--muted); }

.sidebar-nav {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 12px;
  overflow: hidden;
}

.sidebar-section { border-bottom: 1px solid var(--outline); }
.sidebar-section:last-child { border-bottom: none; }

.sidebar-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--brand);
  background: rgba(17, 153, 142, 0.03);
  cursor: pointer;
  transition: background 0.2s;
}

.sidebar-section-title:hover { background: rgba(17, 153, 142, 0.08); }
.sidebar-section-title i { font-size: 10px; transition: transform 0.3s; }
.sidebar-section.collapsed .sidebar-section-title i { transform: rotate(-90deg); }
.sidebar-section.collapsed .sidebar-links { display: none; }

.sidebar-links { padding: 8px; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  text-decoration: none;
}

.sidebar-link:hover { background: rgba(17, 153, 142, 0.08); color: var(--text); transform: translateX(4px); }
.sidebar-link.active { background: rgba(17, 153, 142, 0.15); color: var(--brand); font-weight: 500; }

.sidebar-link-number {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(17, 153, 142, 0.1);
  color: var(--brand);
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}

.sidebar-link.active .sidebar-link-number { background: var(--brand); color: white; }

/* Course Content */
.course-content { min-width: 0; }

/* ══════════════════════════════════════
   COURSE TABS
══════════════════════════════════════ */
.course-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 12px;
  margin-bottom: 24px;
}

.course-tab {
  flex: 1;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.course-tab:hover { color: var(--text); background: rgba(17, 153, 142, 0.05); }
.course-tab.active { color: white; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 4px 15px rgba(17, 153, 142, 0.3); }
.course-tab i { font-size: 14px; }

/* ══════════════════════════════════════
   RESPONSIVE — TABLET (≤1100px)
══════════════════════════════════════ */
@media (max-width: 1100px) {
  .navbar .nav-wrap {
    position: relative;
    justify-content: center;
  }

  .navbar .nav-brand {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 120;
  }

  .navbar .hamburger {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 120;
  }

  .simple-dropdown,
  .mega-menu {
    position: static;
    transform: none;
    min-width: 100%;
    width: 100%;
    max-width: 100%;
    opacity: 1;
    visibility: visible;
    border-radius: 10px;
    margin: 4px 0 8px;
    box-shadow: none;
    display: none;
    overflow-x: hidden;
  }

  .simple-dropdown::before,
  .mega-menu::before { display: none; }

  .nav-item.has-dropdown.mobile-open .simple-dropdown,
  .nav-item.has-dropdown.mobile-open .mega-menu { display: block; }

  /* Override hover-based show for mobile */
  .nav-item.has-dropdown:hover .simple-dropdown,
  .nav-item.has-dropdown:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .mega-menu-grid { grid-template-columns: 1fr; }
  .mega-menu-highlight {
    grid-template-columns: 1fr;
    padding: 14px;
  }
  .simple-dropdown a,
  .mega-menu-card,
  .mega-menu-footer a,
  .mega-menu-highlight-link {
    width: 100%;
    max-width: 100%;
  }
  .simple-dropdown a {
    white-space: normal;
    overflow-wrap: anywhere;
  }
  .mega-menu-card-title,
  .mega-menu-card-desc {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    overflow-wrap: anywhere;
  }

  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: relative; top: 0; max-height: none; margin-bottom: 24px; }
}

/* ══════════════════════════════════════
   RESPONSIVE — MOBILE (≤768px)
══════════════════════════════════════ */
@media (max-width: 768px) {
  .mega-menu-section { padding: 4px; }
  .mega-menu-section h4 { font-size: 10px; margin-bottom: 8px; }
  .mega-menu-card { padding: 10px; }
  .mega-menu-card-icon { width: 32px; height: 32px; font-size: 13px; }
  .mega-menu-highlight-link { padding: 12px; }
  .mega-menu-highlight-icon { width: 36px; height: 36px; font-size: 14px; }
  .mega-menu-footer { margin-top: 12px; padding-top: 12px; }
  .mega-menu-footer a { width: 100%; justify-content: center; padding: 12px; }

  .course-tabs { flex-wrap: wrap; }
  .course-tab { flex: 1 1 45%; padding: 10px 12px; font-size: 12px; }
  .breadcrumbs { font-size: 12px; }
}

/* Menu label text hidden — hamburger icon is sufficient */
.hamburger {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: 1;
}

.hamburger:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 4px;
  border-radius: 12px;
}

.menu-label {
  display: none;
  position: absolute;
  right: 54px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}

@media (max-width: 1100px) {
  .menu-label { display: none !important; }
}

/* ══════════════════════════════════════════════════════════════
   NAV v3 — Yüzen Ada + Pill Öğeler + Tam Ekran Mobil Overlay
   Yüksek özgüllükli seçiciler (nav.navbar / .navbar .x) sayfaların
   inline nav kurallarını kaynak sırasından bağımsız olarak ezer.
══════════════════════════════════════════════════════════════ */
/* Desktop (≥1101px): ekrandan kopuk "ada" + pill öğeler */
@media (min-width: 1101px) {
  nav.navbar:has(.nav-item) {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    padding-top: 12px;
    transition: padding-top .35s cubic-bezier(.22, 1, .36, 1);
  }
  .navbar:has(.nav-item) .nav-wrap {
    min-height: 54px;
    padding: 6px 8px 6px 16px;
    border-radius: 18px;
    background: rgba(12, 18, 36, 0.72);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.10);
    box-shadow: 0 12px 34px rgba(0, 0, 0, .40), inset 0 1px 0 rgba(255, 255, 255, .07);
    transition: min-height .35s cubic-bezier(.22, 1, .36, 1), box-shadow .35s ease, background .35s ease;
  }
  .navbar .nav-menu { gap: 3px; }
  .navbar .nav-menu > .nav-item > a {
    color: var(--muted);
    font-weight: 600;
    font-size: 13px;
    padding: 9px 14px;
    border-radius: 12px;
    background: transparent;
    transition: color .2s ease, background .28s cubic-bezier(.22, 1, .36, 1), box-shadow .28s ease;
  }
  .navbar .nav-menu > .nav-item > a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, .08);
  }
  .navbar .nav-menu > .nav-item > a.active {
    color: #04140f;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    box-shadow: 0 6px 18px rgba(17, 153, 142, .40);
  }
  .navbar .nav-menu > .nav-item > a.active::after { display: none; }

  /* Orta genişlikte (1101–1280) taşmayı önle */
  @media (max-width: 1280px) {
    .navbar .nav-menu > .nav-item > a { padding: 8px 10px; font-size: 12px; }
    .navbar:has(.nav-item) .nav-wrap { padding-left: 12px; }
  }

  /* Scroll'da yoğunlaşma — CSS scroll-driven (destekleyen tarayıcılarda) */
  @supports (animation-timeline: scroll()) {
    @keyframes navV3Condense { to { padding-top: 5px; } }
    @keyframes wrapV3Condense {
      to { min-height: 46px; box-shadow: 0 8px 24px rgba(0, 0, 0, .5); background: rgba(10, 15, 30, .86); }
    }
    nav.navbar:has(.nav-item) { animation: navV3Condense linear both; animation-timeline: scroll(); animation-range: 0 130px; }
    .navbar:has(.nav-item) .nav-wrap { animation: wrapV3Condense linear both; animation-timeline: scroll(); animation-range: 0 130px; }
  }
}

/* Mobil (≤1100px): hamburger → tam ekran overlay + sırayla beliren satırlar */
@media (max-width: 1100px) {
  .navbar:has(.nav-item) .nav-menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 2px;
    padding: 96px 20px calc(env(safe-area-inset-bottom, 0px) + 28px);
    background: rgba(6, 10, 22, 0.975);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    overflow-y: auto;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .3s ease, transform .38s cubic-bezier(.22, 1, .36, 1), visibility .3s;
    z-index: 110;
  }
  .navbar .nav-menu.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
  .navbar .nav-menu > .nav-item {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .45s ease, transform .45s cubic-bezier(.22, 1, .36, 1);
    border-bottom: 1px solid rgba(255, 255, 255, .05);
  }
  .navbar .nav-menu.active > .nav-item { opacity: 1; transform: none; }
  .navbar .nav-menu.active > .nav-item:nth-child(1) { transition-delay: .05s; }
  .navbar .nav-menu.active > .nav-item:nth-child(2) { transition-delay: .10s; }
  .navbar .nav-menu.active > .nav-item:nth-child(3) { transition-delay: .15s; }
  .navbar .nav-menu.active > .nav-item:nth-child(4) { transition-delay: .20s; }
  .navbar .nav-menu.active > .nav-item:nth-child(5) { transition-delay: .25s; }
  .navbar .nav-menu.active > .nav-item:nth-child(6) { transition-delay: .30s; }
  .navbar .nav-menu.active > .nav-item:nth-child(7) { transition-delay: .35s; }
  .navbar .nav-menu.active > .nav-item:nth-child(8) { transition-delay: .40s; }
  .navbar .nav-menu > .nav-item > a {
    font-size: 19px;
    font-weight: 700;
    color: var(--text);
    padding: 16px 12px;
    border-radius: 12px;
    justify-content: space-between;
  }
  .navbar .nav-menu > .nav-item > a:hover { background: rgba(255, 255, 255, .06); }
  nav.navbar { z-index: 120; }
  .navbar .hamburger { z-index: 130; }
  .navbar .nav-brand { z-index: 130; }
}