:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --gradient: linear-gradient(135deg, var(--primary), var(--primary-dark));
  --text-dark: #1e293b;
  --text-light: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Performans optimizasiyaları */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
  will-change: transform, backdrop-filter;
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

.header-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 16px 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  padding: 4px;
  transition: var(--transition);
  will-change: transform;
}

.header-logo img {
  height: 42px;
  transition: var(--transition);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  will-change: transform;
}

.header-logo:hover {
  transform: translateY(-1px);
}

.header-logo:hover img {
  transform: scale(1.08);
}

.header-nav {
  display: flex;
  align-items: center;
}

.header-nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-nav li {
  position: relative;
}

.header-nav a {
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  color: var(--text-dark);
  padding: 8px 0;
  position: relative;
  transition: var(--transition);
  display: block;
  will-change: transform;
}

.header-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transition: var(--transition);
  will-change: width;
}

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

.header-nav li.active a::before,
.header-nav a:hover::before {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-gradient {
  background: var(--gradient);
  color: var(--bg-white) !important;
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-md);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  will-change: transform, box-shadow;
}

.btn-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: var(--transition-slow);
  will-change: left;
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-gradient:hover::before {
  left: 100%;
}

.mobile-toggle {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-dark);
  cursor: pointer;
  transition: var(--transition);
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  will-change: transform;
}

.mobile-toggle:hover {
  background: var(--primary);
  color: var(--bg-white);
  transform: rotate(90deg);
}

@media (max-width: 992px) {
  .header-nav,
  .header-actions .btn-gradient {
    display: none !important;
  }

  .mobile-toggle {
    display: flex !important;
  }

  .header-inner {
    padding: 12px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .header-logo,
  .header-nav a,
  .btn-gradient,
  .mobile-toggle,
  .modal-content,
  .social-card {
    transition: none !important;
    animation: none !important;
  }
}

.modal-container {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 9998;
}

.modal-container.active {
  display: block;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1;
  animation: fadeIn 0.4s ease-out;
}

.modal-content {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 90%;
  max-width: 440px;
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  z-index: 2;
  animation: modalAppear 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  will-change: transform, opacity;
}

@keyframes modalAppear {
  0% {
    transform: translate(-50%, -50%) scale(0.8);
    opacity: 0;
  }
  60% {
    transform: translate(-50%, -50%) scale(1.02);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, #f9fafb, var(--bg-white));
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-title .title-icon {
  background: var(--gradient);
  border-radius: var(--radius-md);
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.modal-title .title-icon i {
  font-size: 18px;
  color: var(--bg-white);
}

.modal-title h3 {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 20px;
  margin: 0;
}

.modal-close {
  background: var(--bg-light);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-light);
  will-change: transform;
}

.modal-close:hover {
  background: var(--primary);
  color: var(--bg-white);
  transform: rotate(90deg);
}

.modal-body {
  padding: 24px;
}

.social-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.social-card {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-decoration: none;
  background: var(--bg-white);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
  gap: 16px;
  will-change: transform, box-shadow;
}

.social-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.social-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  transform: scaleY(0);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: transform;
}

.social-card:hover::before {
  transform: scaleY(1);
}

.social-card.whatsapp::before {
  background: linear-gradient(135deg, #25d366, #128c7e);
}

.social-card.instagram::before {
  background: linear-gradient(135deg, #f09433, #bc1888);
}

.social-card.gmail::before {
  background: linear-gradient(135deg, #ea4335, #d93025);
}

.card-icon {
  background: var(--bg-light);
  padding: 12px;
  border-radius: var(--radius-md);
  font-size: 24px;
  color: var(--text-dark);
  transition: var(--transition);
  min-width: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform;
}

.social-card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.social-card.whatsapp:hover .card-icon {
  background: #25d366;
  color: white;
}

.social-card.instagram:hover .card-icon {
  background: linear-gradient(135deg, #f09433, #bc1888);
  color: white;
}

.social-card.gmail:hover .card-icon {
  background: #ea4335;
  color: white;
}

.card-content {
  flex: 1;
}

.card-content h4 {
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 4px 0;
  font-size: 16px;
}

.card-content p {
  color: var(--text-light);
  margin: 0;
  font-size: 13px;
  font-weight: 500;
}

.card-action i {
  color: var(--text-light);
  transition: var(--transition);
  font-size: 16px;
  will-change: transform;
}

.social-card:hover .card-action i {
  transform: translateX(4px);
  color: var(--primary);
}

.btn-gradient:focus-visible,
.mobile-toggle:focus-visible,
.modal-close:focus-visible,
.social-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.header-logo img[loading="eager"] {
  fetchpriority: high;
}