/*
 * Modern Header Navigation — Minimalist Design (2025)
 * Clean, elegant navigation with natural text and stylish underline
 * 
 * Features:
 * - Minimalist design without background boxes
 * - Elegant thick line under navigation
 * - Natural text with subtle hover effects
 * - Transparent when scrolled, visible on hover or at top
 * - Fully responsive and accessible
 */

/* ========================================
   CSS Custom Properties for Dynamic States
   ======================================== */
:root {
  /* Navigation spacing */
  --nav-margin-top: 0;
  --nav-margin-x: 1rem;
  --nav-padding-x: 1.5rem;
  --nav-padding-y: 1.25rem;

  /* Scroll state variables */
  --nav-opacity: 1; /* Full opacity by default */

  /* Border styling - warm navy accent */
  --nav-border-width: 3px;
  --nav-border-color: var(--accent); /* Warm yellow accent */

  /* Transition timing */
  --nav-transition: all 0.35s var(--ease-smooth);
}

/* ========================================
   Navigation Header Container
   ======================================== */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--nav-margin-top) var(--nav-margin-x);
  opacity: var(--nav-opacity);
  transition: var(--nav-transition);
  background-color: transparent;
}

/* Hover state - show header even when scrolled */
.nav-header:hover {
  --nav-opacity: 1;
}

/* ========================================
   Navigation Container - Minimalist Design
   ======================================== */
.nav-header nav {
  padding: var(--nav-padding-y) var(--nav-padding-x);
  max-width: 1280px;
  margin: 0 auto;

  /* Fully transparent background - no background box */
  background: transparent;

  /* Elegant thick border line at bottom */
  border-bottom: var(--nav-border-width) solid var(--nav-border-color);

  /* Smooth transitions */
  transition: var(--nav-transition);

  /* Performance optimization */
  will-change: opacity, background-color;
}

/* ========================================
   Scrolled State — Transparent Background
   ======================================== */
.nav-header.scrolled {
  --nav-opacity: 0.3; /* Reduced opacity when scrolled */
}

/* At top or on hover - fully visible */
.nav-header:not(.scrolled),
.nav-header.scrolled:hover {
  --nav-opacity: 1; /* Full opacity at top or on hover */
}

/* ========================================
   Logo & Brand
   ======================================== */
.nav-header .nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-header .nav-logo:hover {
  transform: translateY(-2px);
}

/* Logo icon with warm gradient */
.nav-header .logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: grid;
  place-items: center;
  padding: 0.5rem;

  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%) !important;
  box-shadow: 0 2px 8px rgba(244, 196, 48, 0.25);

  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-header .nav-logo:hover .logo-icon {
  box-shadow: 0 4px 12px rgba(244, 196, 48, 0.35);
  transform: scale(1.05);
}

/* Brand text */
.nav-header .brand-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.3s ease;
}

.nav-header .nav-logo:hover .brand-text {
  color: var(--accent-hover);
}

/* ========================================
   Navigation Links Container
   ======================================== */
.nav-header .nav-links {
  align-items: center;
  gap: 2.5rem;
}

/* Only show on desktop (md breakpoint and above) */
@media (min-width: 768px) {
  .nav-header .nav-links {
    display: flex;
  }
}

/* ========================================
   Individual Navigation Links - Minimalist
   ======================================== */
.nav-header .nav-link {
  position: relative;
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-secondary, #6b6b6b);
  padding: 0.5rem 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  background: transparent;
  border: none;
}

/* Hover state - subtle enlargement and bold */
.nav-header .nav-link:hover {
  color: var(--accent) !important;
  font-weight: 600;
  transform: scale(1.05);
}

/* Active state */
.nav-header .nav-link.active {
  color: var(--accent) !important;
  font-weight: 600;
}

/* ========================================
   CTA Button (Umów wizytę)
   ======================================== */
.nav-header .nav-cta {
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: 9999px;

  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%) !important;

  color: white !important;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;

  box-shadow: 0 2px 8px rgba(240, 180, 41, 0.25);

  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Only show on desktop (md breakpoint and above) */
@media (min-width: 768px) {
  .nav-header .nav-cta {
    display: inline-flex;
  }
}

.nav-header .nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(240, 180, 41, 0.35);
}

.nav-header .nav-cta:active {
  transform: translateY(0);
}

/* ========================================
   Mobile Menu Button
   ======================================== */
.nav-header #navBtn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border, #e8dfd4);
  background: transparent;
  color: var(--fg, #3d3d3d);
  font-size: 1.25rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.nav-header #navBtn:hover {
  background: rgba(244, 196, 48, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.nav-header #navBtn:active {
  transform: scale(0.95);
}

/* ========================================
   Mobile Menu
   ======================================== */
.nav-header #mobileMenu {
  margin-top: 0.75rem;
  animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-header #mobileMenu > div {
  border-radius: 1rem;
  padding: 1rem;
  background: var(--bg, #fbf8f3);
  border: 2px solid var(--border, #e8dfd4);
}

.nav-header #mobileMenu a {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  color: var(--fg-secondary, #6b6b6b);
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all 0.2s ease;
}

.nav-header #mobileMenu a:hover {
  background: rgba(244, 196, 48, 0.1);
  color: var(--accent);
  transform: translateX(4px);
}

/* Mobile CTA in menu */
.nav-header #mobileMenu a:last-child {
  margin-top: 0.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%) !important;
  color: white !important;
  text-align: center;
  font-weight: 600;
}

.nav-header #mobileMenu a:last-child:hover {
  transform: translateX(0) translateY(-2px);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet adjustments */
@media (max-width: 1024px) {
  .nav-header .nav-links {
    gap: 1.5rem;
  }

  .nav-header .nav-link {
    font-size: 0.8125rem;
  }
}

/* Mobile adjustments */
@media (max-width: 768px) {
  :root {
    --nav-margin-top: 0;
    --nav-margin-x: 0;
    --nav-padding-x: 1rem;
    --nav-padding-y: 1rem;
    --nav-border-width: 2px;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  :root {
    --nav-padding-x: 0.875rem;
  }

  .nav-header .brand-text {
    font-size: 1rem;
  }

  .nav-header .logo-icon {
    width: 2.25rem;
    height: 2.25rem;
  }
}

/* ========================================
   Accessibility — Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  .nav-header nav,
  .nav-header .nav-logo,
  .nav-header .logo-icon,
  .nav-header .nav-link,
  .nav-header .nav-cta,
  .nav-header #navBtn,
  .nav-header #mobileMenu {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .nav-header .nav-logo:hover,
  .nav-header .nav-link:hover,
  .nav-header .nav-cta:hover {
    transform: none;
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .nav-header {
    position: static;
    background: white;
  }

  .nav-header nav {
    background: white;
    border-bottom: 2px solid var(--accent);
  }
}