/* ═══════════════════════════════════════
   dotry.ai – Zentrale Navigation CSS
   Einbinden: <link rel="stylesheet" href="nav.css">
   ═══════════════════════════════════════ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: rgba(8,12,18,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.logo img { height: 40px; width: auto; }
.logo { text-decoration: none; }

.nav-back {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-back:hover { color: var(--text); }

/* PROGRESS BAR */
.progress-bar {
  position: fixed;
  top: 77px; left: 0; right: 0;
  height: 3px;
  background: var(--border);
  z-index: 99;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  width: 0%;
  transition: width 0.1s;
}

/* ── DROPDOWN NAV ── */
.lessons-dropdown-wrap { position: relative; display: inline-block; }

.lessons-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 9px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.lessons-dropdown-btn:hover { border-color: var(--blue); color: var(--text); }
.lessons-dropdown-btn .dd-arrow { transition: transform 0.2s; font-size: 0.7rem; display: inline-block; }
.lessons-dropdown-btn.open .dd-arrow { transform: rotate(180deg); }

.lessons-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 320px;
  max-height: 70vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(37,99,255,0.3) transparent;
  background: var(--bg2);
  border: 1px solid rgba(37,99,255,0.2);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  z-index: 500;
  display: none;
  animation: ddIn 0.15s ease;
}
.lessons-dropdown-menu::-webkit-scrollbar { width: 4px; }
.lessons-dropdown-menu::-webkit-scrollbar-track { background: transparent; }
.lessons-dropdown-menu::-webkit-scrollbar-thumb { background: rgba(37,99,255,0.3); border-radius: 2px; }
.lessons-dropdown-menu.open { display: block; }

@keyframes ddIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.dd-track-label {
  padding: 10px 16px 7px;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1;
}
.dd-track-label.g { color: #22c55e; background: rgba(34,197,94,0.05); }
.dd-track-label.b { color: var(--blue-light); background: rgba(37,99,255,0.05); }
.dd-track-label.o { color: #f97316; background: rgba(249,115,22,0.05); }

.dd-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  text-decoration: none;
  transition: background 0.15s;
  border-bottom: 1px solid var(--border);
}
.dd-item:last-child { border-bottom: none; }
.dd-item:hover { background: rgba(37,99,255,0.07); }

.dd-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.62rem;
  font-weight: 800;
  flex-shrink: 0;
}
.dd-num.g { background: rgba(34,197,94,0.1); color: #22c55e; }
.dd-num.b { background: rgba(37,99,255,0.15); color: var(--blue-light); }
.dd-num.o { background: rgba(249,115,22,0.1); color: #f97316; }

.dd-info { flex: 1; }
.dd-title { font-size: 0.84rem; font-weight: 700; color: var(--text); }
.dd-meta  { font-size: 0.7rem; color: var(--text-muted); margin-top: 1px; }

.dd-badge { font-size: 0.62rem; font-weight: 700; padding: 2px 8px; border-radius: 50px; flex-shrink: 0; }
.dd-badge.live { background: rgba(34,197,94,0.1); color: #22c55e; border: 1px solid rgba(34,197,94,0.2); }
.dd-badge.soon { background: rgba(255,255,255,0.04); color: var(--text-muted); border: 1px solid var(--border); }

/* MOBILE */
@media (max-width: 640px) {
  nav { padding: 14px 16px; }
  .nav-back { font-size: 0.82rem; }

  .lessons-dropdown-menu {
    left: 0;
    transform: none;
    min-width: 290px;
    max-height: 60vh;
  }
  .lessons-dropdown-menu.open { animation: ddInM 0.15s ease; }

  @keyframes ddInM {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}