#scrollProgress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--cat-travel));
  transform: scaleX(0);
  transform-origin: 0 0;
  z-index: 1100;
  transition: transform 0.1s linear;
  pointer-events: none;
}

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--sp-4) var(--sp-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: background var(--t-base) var(--ease), border-color var(--t-base) var(--ease), padding var(--t-base) var(--ease);
}
#navbar.scrolled {
  padding: var(--sp-3) var(--sp-5);
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
}

.nav-left { display: flex; align-items: center; gap: var(--sp-5); }

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  color: var(--text-main);
}
.logo-img { height: 32px; width: auto; display: block; }
.logo-text {
  font-size: var(--fs-xl);
  font-weight: var(--fw-black);
  letter-spacing: -0.03em;
}
.logo-text span { color: var(--primary); }

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.theme-toggle {
  background: var(--surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color var(--t-base) var(--ease), transform var(--t-base) var(--ease), background-color var(--t-base) var(--ease);
  font-size: 16px;
  line-height: 1;
}
.theme-toggle:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  background-color: var(--surface-elevated);
}
.theme-toggle:active {
  transform: translateY(0) scale(0.94);
  transition-duration: 0.08s;
}

.lang-select {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  height: 40px;
  min-width: 54px;
  border-radius: var(--r-pill);
  padding: 0 var(--sp-3);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: border-color var(--t-base) var(--ease), background-color var(--t-base) var(--ease);
  -webkit-appearance: none;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%),
                    linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 18px, calc(100% - 11px) 18px;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px;
}
.lang-select:hover {
  border-color: var(--primary);
  color: var(--text-main);
}
.lang-select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.nav-btn {
  background: var(--primary);
  color: var(--text-white);
  padding: 10px 22px;
  border-radius: var(--r-pill);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
  box-shadow: 0 4px 20px var(--primary-glow);
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}
.nav-btn:active {
  transform: translateY(0) scale(0.97);
  transition-duration: 0.08s;
}