/* Modern CSS Reset ve Normalize */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Modern Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

/* Modern Grid System */
.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Modern Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

/* Modern Spacing */
.space-y-1 > * + * {
  margin-top: 0.25rem;
}

.space-y-2 > * + * {
  margin-top: 0.5rem;
}

.space-y-4 > * + * {
  margin-top: 1rem;
}

.space-y-8 > * + * {
  margin-top: 2rem;
}

/* Modern Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  h4 { font-size: 1.25rem; }
  h5 { font-size: 1.125rem; }
  h6 { font-size: 1rem; }
}

/* Modern Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
  background: #f8f9fa;
  color: #333;
  border: 1px solid #dee2e6;
}

.btn-secondary:hover {
  background: #e9ecef;
  transform: translateY(-1px);
}

/* Modern Cards */
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 1.5rem;
}

/* Modern Images */
.img-fluid {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Modern Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in {
  animation: slideIn 0.5s ease-out;
}

.pulse {
  animation: pulse 2s infinite;
}

/* Modern Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: #667eea; }
.text-secondary { color: #6c757d; }
.text-success { color: #28a745; }
.text-danger { color: #dc3545; }
.text-warning { color: #ffc107; }
.text-info { color: #17a2b8; }

.bg-primary { background-color: #667eea; }
.bg-secondary { background-color: #6c757d; }
.bg-light { background-color: #f8f9fa; }
.bg-dark { background-color: #343a40; }

.rounded { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-full { border-radius: 50%; }

.shadow { box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); }
.shadow-lg { box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15); }

/* Responsive Utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

@media (min-width: 768px) {
  .d-md-none { display: none; }
  .d-md-block { display: block; }
  .d-md-flex { display: flex; }
  .d-md-grid { display: grid; }
}

@media (min-width: 1024px) {
  .d-lg-none { display: none; }
  .d-lg-block { display: block; }
  .d-lg-flex { display: flex; }
  .d-lg-grid { display: grid; }
}

/* Modern Form Elements */
.form-group {
  margin-bottom: 1rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Modern Navigation */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: #333;
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  padding: 0.5rem 1rem;
  color: #333;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: #667eea;
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  .navbar-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  .navbar-nav.active {
    display: flex;
  }
  
  .nav-link {
    padding: 1rem;
    border-bottom: 1px solid #f8f9fa;
  }
}

/* Modern Footer */
.footer {
  background: #2d3748;
  color: white;
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: #667eea;
  margin-bottom: 1rem;
}

.footer-bottom {
  border-top: 1px solid #4a5568;
  padding-top: 1rem;
  text-align: center;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .footer,
  .btn {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
}