/**
 * Header & Navigation Styles - Modern Design
 * Bora Akü Website Modernization
 */

/* ============================================
   TOP HEADER BAR
   ============================================ */

.top_header {
  background: var(--gradient-primary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-grid {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.top_header .fa {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  margin-right: var(--space-2);
  transition: all var(--transition-base);
}

.top_header .fa:hover {
  color: var(--color-text-white);
  transform: scale(1.1);
}

.top_header p {
  margin: 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.4;
}

.top_header p a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.top_header p a:hover {
  color: var(--color-text-white);
  text-decoration: underline;
}

.top_header p .block {
  display: block;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.75);
  font-weight: var(--font-weight-normal);
}

/* ============================================
   NAVIGATION CONTAINER
   ============================================ */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  position: relative;
}

/* Logo */
#logo {
  flex-shrink: 0;
  z-index: 100;
}

#logo a {
  display: block;
  line-height: 0;
}

#logo img {
  max-height: 50px;
  width: auto;
  transition: all var(--transition-base);
}

#logo a:hover img {
  transform: scale(1.05);
}

/* ============================================
   NAVIGATION MENU
   ============================================ */

nav ul.menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-2);
}

nav ul.menu li {
  position: relative;
  list-style: none;
}

nav ul.menu li a {
  position: relative;
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

/* Micro-interaction: Hover Background */
nav ul.menu li a:hover {
  background: rgba(99, 102, 241, 0.05);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* Active State */
nav ul.menu li.active a {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Animated Underline Effect */
nav ul.menu li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

nav ul.menu li a:hover::after,
nav ul.menu li.active a::after {
  width: calc(100% - calc(var(--space-4) * 2));
}

/* ============================================
   DROPDOWN MENU
   ============================================ */

nav ul.menu li .inner-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: var(--space-2);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  list-style: none;
  margin: 0;
}

/* Show dropdown on hover or checkbox check */
nav ul.menu li:hover .inner-dropdown,
nav ul.menu li input[type="checkbox"]:checked ~ .inner-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

nav ul.menu li .inner-dropdown li {
  margin: 0;
  list-style: none;
}

nav ul.menu li .inner-dropdown li a {
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  border-radius: var(--radius-md);
  display: block;
}

nav ul.menu li .inner-dropdown li a:hover {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  transform: translateX(4px);
}

/* Dropdown Icon */
nav ul.menu li a .fa-angle-down {
  margin-left: var(--space-1);
  transition: transform var(--transition-base);
  font-size: var(--font-size-xs);
}

nav ul.menu li:hover a .fa-angle-down,
nav ul.menu li input[type="checkbox"]:checked ~ a .fa-angle-down {
  transform: rotate(180deg);
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */

.toggle {
  display: none;
}

/* Hide checkbox */
nav input[type="checkbox"] {
  display: none;
}

/* ============================================
   MOBILE RESPONSIVE (767px and below)
   ============================================ */

@media (max-width: 767px) {
  /* Top Header Mobile */
  .top_header {
    padding: var(--space-2) 0;
  }

  .top-grid {
    font-size: var(--font-size-xs);
  }

  .top_header .fa {
    font-size: var(--font-size-base);
    margin-right: var(--space-1);
  }

  /* Navigation Mobile */
  nav {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3) 0;
  }

  #logo {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  #logo img {
    max-height: 40px;
  }

  /* Mobile Toggle Button */
  .toggle {
    display: block;
    padding: var(--space-2) var(--space-4);
    background: var(--gradient-accent);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
  }

  .toggle:hover {
    background: var(--gradient-accent-hover);
    transform: scale(1.05);
  }

  .toggle:active {
    transform: scale(0.98);
  }

  /* Mobile Menu */
  nav ul.menu {
    display: none;
    flex-direction: column;
    width: 100%;
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    gap: 0;
  }

  /* Show menu when checkbox is checked */
  nav input[type="checkbox"]:checked ~ ul.menu {
    display: flex;
    animation: slideInDown 0.3s ease-out;
  }

  nav ul.menu li {
    width: 100%;
    margin: 0;
  }

  nav ul.menu li a {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
  }

  /* Mobile Dropdown */
  nav ul.menu li .inner-dropdown {
    position: static;
    width: 100%;
    margin-top: var(--space-2);
    margin-left: var(--space-4);
    box-shadow: none;
    border: none;
    background: rgba(99, 102, 241, 0.05);
    padding: var(--space-2);
    border-radius: var(--radius-md);
  }

  nav ul.menu li input[type="checkbox"]:checked ~ .inner-dropdown {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  nav ul.menu li:hover .inner-dropdown {
    opacity: 0;
    visibility: hidden;
  }

  /* Mobile Dropdown Items */
  nav ul.menu li .inner-dropdown li a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
  }

  /* Dropdown Toggle Label for Mobile */
  nav ul.menu li label.toggle {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
  }

  nav ul.menu li label.toggle:hover {
    background: rgba(99, 102, 241, 0.05);
    color: var(--color-primary);
  }

  /* Hide desktop dropdown trigger */
  nav ul.menu li > a .fa-angle-down {
    display: none;
  }
}

/* ============================================
   TABLET (768px - 1023px)
   ============================================ */

@media (min-width: 768px) and (max-width: 1023px) {
  nav ul.menu {
    gap: var(--space-1);
  }

  nav ul.menu li a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
  }

  #logo img {
    max-height: 45px;
  }
}

/* ============================================
   STICKY HEADER (Scrolled State)
   ============================================ */

header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

header.scrolled .top_header {
  padding: var(--space-2) 0;
}

header.scrolled nav {
  padding: var(--space-3) 0;
}

header.scrolled #logo img {
  max-height: 40px;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dropdown Animation */
nav ul.menu li .inner-dropdown li {
  animation: fadeInUp 0.3s ease-out backwards;
}

nav ul.menu li .inner-dropdown li:nth-child(1) { animation-delay: 0.05s; }
nav ul.menu li .inner-dropdown li:nth-child(2) { animation-delay: 0.1s; }
nav ul.menu li .inner-dropdown li:nth-child(3) { animation-delay: 0.15s; }
nav ul.menu li .inner-dropdown li:nth-child(4) { animation-delay: 0.2s; }
nav ul.menu li .inner-dropdown li:nth-child(5) { animation-delay: 0.25s; }

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