/* ═══════════════════════════════════════════════════════
   STILLNESS — NAVIGATION
   ═══════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-nav);
  width: min(760px, calc(100% - 36px));
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 6px 0 24px;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-pill);
  box-shadow:
    0 4px 28px rgba(0, 0, 0, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.55);
  animation: fadeIn .8s var(--ease-out) both;
  overflow: hidden;
}

.nav-cta-btn {
  height: 40px !important;
  padding: 0 20px !important;
  font-size: 0.85rem !important;
  line-height: 1 !important;
  border-radius: var(--r-pill) !important;
  white-space: nowrap;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  flex-shrink: 0;
  transition: opacity .25s;
}
.nav-logo:hover { opacity: 0.75; }

.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color .25s var(--ease);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}

.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-login {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--r-pill);
  transition: color .25s, background .25s;
}
.nav-login:hover {
  color: var(--text-primary);
  background: var(--glass-bg-medium);
}

/* Mobile nav */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  border-radius: var(--r-sm);
}
.nav-burger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform .3s var(--ease), color .3s var(--ease), background .3s var(--ease);
}

@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav-login  { display: none; }
  .nav-burger { display: flex; }
  /* Уменьшаем зазор и кнопку чтобы вошли: logo + burger + auth */
  .nav { gap: 8px; }
  .nav-actions { gap: 6px; }
  .nav-actions .btn {
    padding: 6px 14px !important;
    font-size: 0.78rem !important;
    height: 34px !important;
  }
}


/* ── Mobile nav drawer ─────────────────────────────── */
.nav-drawer {
  position: fixed;
  top: 78px; /* 18px nav-top + 52px nav-height + 8px gap */
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  z-index: calc(var(--z-nav) - 1);
  width: min(760px, calc(100% - 36px));
  background: rgba(250, 248, 244, 0.97);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--glass-shadow-hover);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease-out);
  display: none;
}
.nav-drawer.open {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
@media (max-width: 767px) {
  .nav-drawer { display: block; }
}

.nav-drawer .nav-links {
  display: flex !important;
  flex-direction: column;
  gap: 2px;
}
.nav-drawer .nav-links li { list-style: none; }
.nav-drawer .nav-links a {
  padding: 14px 20px;
  border-radius: var(--r-md);
  font-size: .88rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  min-height: 44px;
  display: flex;
  align-items: center;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-drawer .nav-links a:hover,
.nav-drawer .nav-links a[aria-current] {
  background: var(--glass-bg-medium);
  color: var(--accent);
}
.nav-drawer .nav-links a::after { display: none; }

/* Burger → X animation */
.nav-burger span {
  transition: transform .3s var(--ease), opacity .3s var(--ease), background .3s var(--ease);
}
.nav-burger.open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { transform: scaleX(0); opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }