/*==================================================
  CSS VARIABLES & RESET
==================================================*/
:root {
  --color-darkred: #8B0000;
  --color-darkred-hover: #a80000;
  --color-navy: #0A192F;
  --color-turquoise: #40E0D0;
  --color-turquoise-hover: #2ecbc0;
  --color-light: #f8f9fa;
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Poppins', sans-serif;
  --transition-speed: 0.3s;
}

html {
  /* scroll-behavior: smooth; -> BU SATIRI SİL VEYA YORUMA AL */
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  color: #333;
  line-height: 1.6;
  background-color: var(--color-light);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: var(--font-secondary);
}

/* Typography Utility */
.text-navy { color: var(--color-navy) !important; }
.text-darkred { color: var(--color-darkred) !important; }
.text-turquoise { color: var(--color-turquoise) !important; }
.bg-navy { background-color: var(--color-navy) !important; }
.bg-darkred { background-color: var(--color-darkred) !important; }
.bg-turquoise { background-color: var(--color-turquoise) !important; }

/* Transitions */
.transition-all { transition: all var(--transition-speed) ease-in-out; }
.transition-hover { transition: transform 0.3s ease, box-shadow 0.3s ease; }

/*==================================================
  NAVIGATION
==================================================*/
#main-nav {
  background-color: transparent;
  padding: 1.5rem 0;
  z-index: 1030;
}
#main-nav.scrolled {
  background: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0.8rem 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}
.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.8);
  margin-left: 1.5rem;
  position: relative;
}
.navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
  color: var(--color-turquoise);
}
.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  background: var(--color-turquoise);
  bottom: 0;
  left: 0;
  transition: width var(--transition-speed);
}
.navbar-nav .nav-link:hover::after, .navbar-nav .nav-link.active::after {
  width: 100%;
}
.custom-toggler {
  border-color: rgba(255,255,255,0.5);
}
.custom-toggler .navbar-toggler-icon {
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255, 255, 255, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/*==================================================
  HERO SECTION
==================================================*/
.hero-section {
  min-height: 100vh;
  background: linear-gradient(135deg, #3f51b5 0%, #112240 100%);
  position: relative;
  padding-top: 100px;
}
.hero-image {
  max-height: 500px;
  object-fit: cover;
  border: 0px solid rgba(255,255,255,0.1);
}
.btn-primary-custom {
  background-color: var(--color-darkred);
  border-color: var(--color-darkred);
  color: white;
  font-weight: 600;
}
.btn-primary-custom:hover {
  background-color: var(--color-darkred-hover);
  border-color: var(--color-darkred-hover);
  color: white;
  transform: translateY(-3px);
}
.btn-outline-light:hover {
  color: var(--color-navy);
  background-color: #fff;
  transform: translateY(-3px);
}
.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
  40% { transform: translateY(-20px) translateX(-50%); }
  60% { transform: translateY(-10px) translateX(-50%); }
}

/*==================================================
  GLOBAL SECTIONS & UTILITIES
==================================================*/
.section-padding { padding: 100px 0; }
.divider {
  height: 4px;
  width: 60px;
  background: var(--color-turquoise);
  border-radius: 2px;
}

/*==================================================
  SERVICE CARDS
==================================================*/
.service-card {
  border: 1px solid rgba(0,0,0,0.05);
}
.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.1) !important;
  border-color: rgba(64, 224, 208, 0.3);
}

/*==================================================
  SEO ARTICLE SECTION
==================================================*/
.seo-content {
  font-size: 1.05rem;
  line-height: 1.8;
}
.seo-content p { margin-bottom: 1.5rem; }
.seo-link {
  text-decoration: underline;
  text-decoration-color: var(--color-turquoise);
  text-underline-offset: 4px;
  transition: all 0.2s ease;
}
.seo-link:hover {
  background-color: var(--color-turquoise);
  color: var(--color-navy) !important;
  text-decoration-color: transparent;
}
.accordion-button:not(.collapsed) {
  background-color: rgba(64, 224, 208, 0.1);
  color: var(--color-navy);
  box-shadow: inset 0 -1px 0 rgba(0,0,0,.125);
}
.accordion-button:focus { box-shadow: none; }

/*==================================================
  CONTACT SECTION
==================================================*/
.contact-card {
  border: 1px solid rgba(0,0,0,0.03);
}
.contact-card:hover {
  transform: translateX(10px);
  border-left: 4px solid var(--color-darkred);
}
.hover-red:hover { color: var(--color-darkred) !important; }

/*==================================================
  FOOTER
==================================================*/
.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--color-turquoise);
}
.social-icons a {
  display: inline-block;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  color: white;
  line-height: 40px;
  text-align: center;
  margin-left: 10px;
  transition: all 0.3s ease;
}
.social-icons a:hover {
  background: var(--color-turquoise);
  color: var(--color-navy);
  transform: translateY(-3px);
}

/*==================================================
  ANIMATIONS (Scroll Reveal)
==================================================*/
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s forwards ease-out;
}
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

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

.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease-out;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width:768px){
  .desktop-only{
    display:none !important;
  }
}