/* ============================================
   BİZ SUNUCU BULUT - Premium Kurumsal Web Sitesi
   Tasarım Sistemi
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Renk Paleti - Kurumsal Güven */
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-primary-dark: #020617;
  --color-accent: #059669;
  --color-accent-hover: #047857;
  --color-accent-light: #d1fae5;
  --color-gold: #b45309;
  --color-gold-light: #fef3c7;
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  
  /* Tipografi */
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

/* Skip Link - Erişilebilirlik */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: 10001;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: var(--space-md);
  outline: 2px solid var(--color-accent);
}

/* Print Styles */
@media print {
  .header, .mobile-nav, .whatsapp-float, .skip-link, .nav-toggle { display: none !important; }
  .footer { margin-top: 2rem; }
  body { font-size: 12pt; }
  a[href^="https://wa.me"] { display: none; }
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-bottom: var(--space-lg); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); margin-bottom: var(--space-md); }
h4 { font-size: 1.125rem; margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-gray-500);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Header / Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
}

.logo img {
  height: 32px;
  width: auto;
}

.logo span { color: var(--color-accent); }

.nav-links {
  display: none;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
  }
  
  .nav-links a {
    font-weight: 500;
    color: var(--color-gray-500);
  }
  
  .nav-links a:hover {
    color: var(--color-accent);
  }
}

/* Mobile Menu */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-base);
}

.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-white);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
}

.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav a {
  display: block;
  padding: var(--space-md);
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-100);
}

/* Hero Section */
.hero {
  padding: calc(72px + var(--space-4xl)) 0 var(--space-4xl);
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.6s ease;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.3s both;
}

/* Section Styles */
.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background: var(--color-gray-50);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

/* Feature Grid */
.feature-grid {
  display: grid;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.feature-card h3 {
  margin-bottom: var(--space-sm);
}

.feature-card p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Process Steps */
.process-steps {
  display: grid;
  gap: var(--space-2xl);
  position: relative;
}

@media (min-width: 768px) {
  .process-steps {
    grid-template-columns: repeat(5, 1fr);
  }
}

.process-step {
  text-align: center;
  position: relative;
}

.process-number {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  margin: 0 auto var(--space-lg);
}

.process-step h3 {
  margin-bottom: var(--space-sm);
}

.process-step p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: var(--space-4xl) 0;
  text-align: center;
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-section p {
  color: var(--color-gray-300);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.cta-section .btn-primary {
  background: var(--color-accent);
}

.cta-section .btn-primary:hover {
  background: var(--color-accent-hover);
}

/* Footer */
.footer {
  background: var(--color-primary-dark);
  color: var(--color-gray-300);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
  display: grid;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer h4 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  font-size: 1rem;
}

.footer a {
  display: block;
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-primary-light);
  text-align: center;
  font-size: 0.875rem;
}

/* Page Header */
.page-hero {
  padding: calc(72px + var(--space-4xl)) 0 var(--space-3xl);
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.page-hero h1 {
  margin-bottom: var(--space-md);
}

.page-hero p {
  font-size: 1.125rem;
  max-width: 700px;
}

/* Content Sections */
.content-section {
  padding: var(--space-3xl) 0;
}

.content-section h2 {
  padding-top: var(--space-2xl);
  margin-top: var(--space-2xl);
  border-top: 1px solid var(--color-gray-200);
}

.content-section h2:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: none;
}

.content-block {
  margin-bottom: var(--space-2xl);
}

.content-block h3 {
  color: var(--color-primary);
}

/* WhatsApp Floating Button */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-sm);
}

.whatsapp-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: #25D366;
  color: var(--color-white) !important;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 0.9375rem;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all var(--transition-base);
}

.whatsapp-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

.whatsapp-btn svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.whatsapp-tooltip {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.whatsapp-float:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateY(0);
}

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

.fade-in {
  opacity: 0;
  transform: translateY(20px);
}

.fade-in.visible {
  animation: fadeInUp 0.6s ease forwards;
}

/* Service Cards - Web Tasarım Sayfası */
.service-card {
  padding: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  margin-bottom: var(--space-2xl);
  transition: all var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-lg);
}

.service-card h2 {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.service-card h2 .icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

/* Form Styles */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Turkey Badge */
.turkey-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-gold-light);
  color: var(--color-gold);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
}

.turkey-badge a {
  color: inherit;
  text-decoration: underline;
}

.turkey-badge a:hover {
  opacity: 0.9;
}

.mb-3xl { margin-bottom: var(--space-3xl); }

/* Breadcrumb SEO */
.breadcrumb {
  padding: var(--space-md) 0;
  font-size: 0.875rem;
}

.breadcrumb nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb a {
  color: var(--color-gray-500);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb span {
  color: var(--color-gray-400);
  margin: 0 var(--space-xs);
}

.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 500;
}