/* ============================================
   NAVBAR - Header & Navigation Styles
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0);
  contain: layout style;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
  backdrop-filter: blur(5px);
}

.header.scrolled .logo {
  color: var(--color-primary-light);
}

.header.scrolled .logo span {
  color: var(--color-secondary);
}

.header.scrolled .nav-links a {
  color: var(--color-text-muted);
}

.header.scrolled .nav-links a:hover,
.header.scrolled .nav-links a.active {
  color: var(--color-primary);
}

.header.scrolled .nav-toggle span {
  background: var(--color-primary);
}

.nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.27rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-secondary);
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

.logo-imgs {
  position: relative;
  display: inline-block;
  line-height: 0;
}

.logo-img {
  height: 100px;
  width: auto;
  object-fit: contain;
  display: block;
  opacity: 0;
  transition: opacity 0.4s ease, height var(--transition-base);
  transform: translateZ(0);
  backface-visibility: hidden;
}

.logo-imgs:hover {
  scale: 1.2;
  transition: scale var(--transition-base);
}

.logo-img-default {
  position: relative;
  opacity: 1;
}

.logo-img-scrolled {
  position: absolute;
  top: 0;
  left: 0;
}

.header.scrolled .logo-img {
  height: 56px;
  width: auto;
}

.header.scrolled .logo-img-default {
  opacity: 0;
  pointer-events: none;
}

.header.scrolled .logo-img-scrolled {
  opacity: 1;
}


.logo span {
  color: white;
  transition: color var(--transition-base);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-weight: 400;
  font-size: 1rem;
  color: white;
  transition: color var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  font-size: 1.05rem;
  transition: all 0.1s ease;
}

.nav-toggle span {
  background: white;
  transition: background var(--transition-base);
}

.btn-claim {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  color: white !important;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 2px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-claim:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 4px rgba(0, 0, 0, 0.2);
  color: white !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: white;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3xl) var(--space-xl);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-base);
    gap: var(--space-md);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links a {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
  }
  
  .nav-links a:hover,
  .nav-links a.active {
    color: var(--color-primary);
  }
  
  .nav {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }
}