/* 
  Bilişim Dental - Style Guide & Main CSS
*/

:root {
  /* Colors */
  --primary-deep-blue: #0A1E3F;
  --primary-blue: #1A4D94;
  --tech-blue: #00B4D8;
  --tech-blue-light: #90E0EF;
  
  --silver: #9CA3AF;
  --silver-light: #F3F4F6;
  --clean-white: #FFFFFF;
  --dark-bg: #030C1A;
  
  /* Gradients */
  --gradient-tech: linear-gradient(135deg, var(--tech-blue) 0%, var(--primary-blue) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  
  /* Fonts */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(0, 180, 216, 0.3);
  --glass-border: 1px solid rgba(255, 255, 255, 0.18);
  
  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1200px;
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: #374151; /* Dark Gray for readibility */
  background-color: var(--clean-white);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-deep-blue);
  line-height: 1.2;
}

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

ul {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Utilities */
.text-primary { color: var(--primary-blue); }
.text-tech { color: var(--tech-blue); }
.text-gradient {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.bg-silver-light { background-color: var(--silver-light); }
.bg-dark { background-color: var(--dark-bg); }
.text-white { color: var(--clean-white); }
.text-white h1, .text-white h2, .text-white h3 { color: var(--clean-white); }
.text-center { text-align: center; }

.section-padding { padding: var(--section-padding); }
.mt-large { margin-top: 48px; }
.mt-medium { margin-top: 32px; }

.grid-2-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.align-center { align-items: center; }
.gap-large { gap: 64px; }
.flex-gap { display: flex; gap: 16px; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500;
  font-family: var(--font-heading);
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn i { font-size: 1.25rem; }

.btn-primary {
  background: var(--gradient-tech);
  color: white;
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
  background: var(--primary-deep-blue);
  color: white;
}

.btn-secondary:hover {
  background: var(--primary-blue);
}

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

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

.btn-large {
  padding: 16px 32px;
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

/* Glassmorphism Classes */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--glass-border);
  border-radius: 16px;
  padding: 32px;
}
.bg-dark .glass-card {
  background: var(--gradient-glass);
  border-color: rgba(255, 255, 255, 0.05);
}

.boxed-shadow {
  box-shadow: var(--shadow-lg);
}

/* Navbar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

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

.nav-container {
  display: flex;
  align-items: center;
  min-height: 120px;
}

.main-nav {
  margin-left: auto;
  margin-right: 24px;
}

.brand-logo, .custom-logo {
  height: 144px !important;
  width: auto !important;
  max-width: 320px !important;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 16px;
  align-items: center;
  white-space: nowrap;
}

.nav-links li a {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--primary-deep-blue);
  position: relative;
}

.nav-links li a:hover {
  color: var(--tech-blue);
}

.nav-links li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--tech-blue);
  transition: var(--transition);
}

.nav-links li a:hover::after {
  width: 100%;
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 200px;
  box-shadow: var(--shadow-lg);
  border-radius: 8px;
  padding: 16px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 8px 24px;
  /* removing hover line for dropdown */
}
.dropdown-menu li a::after { display: none; }
.dropdown-menu li a:hover {
  background-color: var(--silver-light);
}

.nav-ctas {
  display: flex;
  gap: 12px;
}
.nav-ctas .btn {
  padding: 6px 12px;
  font-size: 0.8rem;
}
.nav-ctas .btn i {
  font-size: 1rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--primary-deep-blue);
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 180px; /* Offset for navbar */
  overflow: hidden;
  background: linear-gradient(to bottom, #F8FAFC 0%, var(--clean-white) 100%);
}

.hero-bg-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.glow-1 {
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,180,216,0.3) 0%, rgba(255,255,255,0) 70%);
}

.glow-2 {
  bottom: 10%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(26,77,148,0.2) 0%, rgba(255,255,255,0) 70%);
}

.grid-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.hero-container {
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 180, 216, 0.1);
  color: var(--tech-blue);
  border-radius: 20px;
  font-family: var(--font-heading);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 24px;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--silver);
  margin-bottom: 40px;
  max-width: 90%;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--primary-deep-blue);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--silver);
}

/* Hero Visual */
.hero-visual {
  position: relative;
}

.main-hero-card {
  position: relative;
  text-align: center;
  padding: 64px 32px;
  border-radius: 24px;
  background: linear-gradient(145deg, #ffffff, #f0f4f8);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.8);
}

.device-mockup {
  position: relative;
  display: inline-block;
  margin-bottom: 24px;
}

.scanner-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--tech-blue);
  box-shadow: 0 2px 10px var(--tech-blue);
  animation: scan 3s ease-in-out infinite alternate;
}

@keyframes scan {
  0% { top: 0; }
  100% { top: 100%; }
}

.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  font-size: 0.875rem;
  animation: float 4s ease-in-out infinite;
}

.badge-1 {
  top: 10%;
  left: -10%;
}

.badge-2 {
  bottom: 20%;
  right: -15%;
  animation-delay: 1.5s;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* Sections */
.section-header {
  margin-bottom: 64px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--silver);
  max-width: 700px;
  margin: 0 auto;
}

.section-subtitle.light {
  color: rgba(255,255,255,0.7);
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.service-card {
  background: white;
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--silver-light);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--tech-blue-light);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 180, 216, 0.1);
  color: var(--tech-blue);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 24px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--tech-blue);
  color: white;
}

.service-card h3 {
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.service-card p {
  color: var(--silver);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.875rem;
  color: var(--primary-deep-blue);
}

.service-features li i {
  color: var(--tech-blue);
}

.highlight-box {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.highlight-icon {
  font-size: 2.5rem;
  color: var(--tech-blue);
  flex-shrink: 0;
}

.highlight-content h4 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.highlight-content p {
  color: var(--silver);
}

/* Backup section */
.server-mockup {
  position: relative;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 40px;
  display: inline-block;
}

.server-rack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.server-unit {
  width: 250px;
  height: 48px;
  background: #111;
  border-radius: 8px;
  border: 1px solid #333;
  display: flex;
  align-items: center;
  padding: 0 16px;
  justify-content: flex-end;
}

.server-unit.active {
  border-color: var(--tech-blue);
  box-shadow: 0 0 15px rgba(0, 180, 216, 0.2) inset;
}

.ledleds {
  display: flex;
  gap: 8px;
}

.led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #333;
}

.led.blink {
  background: #10B981;
  box-shadow: 0 0 8px #10B981;
  animation: blink 2s infinite;
}

.led.blink.fast {
  background: var(--tech-blue);
  box-shadow: 0 0 8px var(--tech-blue);
  animation: blink 0.5s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.cloud-connection {
  position: absolute;
  top: -30px;
  right: -30px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-tech);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  box-shadow: var(--shadow-glow);
  animation: float 4s ease-in-out infinite 1s;
}

.feature-list li {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
}

.feature-list .icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 180, 216, 0.15);
  color: var(--tech-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-list strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin-bottom: 4px;
}

.feature-list span {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
}

/* Brands */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.brand-card {
  background: white;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--silver-light);
  cursor: pointer;
}

.brand-card:hover {
  box-shadow: var(--shadow-lg);
  transform: scale(1.05);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--primary-deep-blue);
  letter-spacing: 2px;
  opacity: 0.7;
  transition: var(--transition);
}

.brand-card:hover .brand-text {
  opacity: 1;
  color: var(--tech-blue);
}

/* Contact & Form */
.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item .icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(26, 77, 148, 0.1);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.contact-item span {
  display: block;
  font-size: 0.875rem;
  color: var(--silver);
}

.contact-item strong {
  font-size: 1.125rem;
  color: var(--primary-deep-blue);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.875rem;
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  background: #F9FAFB;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--tech-blue);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
  background: white;
}

/* Footer */
.site-footer {
  background: var(--dark-bg);
  color: white;
  padding-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-logo {
  height: 60px;
  margin-bottom: 24px;
  filter: brightness(0) invert(1); /* Makes dark logo white if needed */
}

.footer-brand p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 24px;
  max-width: 400px;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.social-links a:hover {
  background: var(--tech-blue);
}

.footer-links h4 {
  color: white;
  margin-bottom: 24px;
  font-size: 1.125rem;
}

.footer-links ul li {
  margin-bottom: 12px;
}

.footer-links ul li a {
  color: rgba(255,255,255,0.7);
}

.footer-links ul li a:hover {
  color: var(--tech-blue);
  padding-left: 8px; /* Hover animation */
}

.border-top {
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  color: rgba(255,255,255,0.5);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a:hover {
  color: white;
}

/* Animations */
.reveal-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-fade-left {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-fade-right {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-active {
  opacity: 1;
  transform: translate(0);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(3, 12, 26, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: white;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  transform: translateY(30px);
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-container {
  transform: translateY(0);
}

.modal-header {
  padding: 24px;
  border-bottom: 1px solid var(--silver-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--primary-deep-blue);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--silver);
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  color: #EF4444;
}

.modal-content {
  padding: 24px;
  overflow-y: auto;
}

.modal-content h4 {
  font-size: 1.1rem;
  margin-top: 16px;
  margin-bottom: 8px;
  color: var(--primary-deep-blue);
}

.modal-content h4:first-child {
  margin-top: 0;
}

.modal-content p {
  color: #4B5563;
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content h1 { font-size: 3rem; }
  .brands-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2-col {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-ctas {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-content h1 { font-size: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .badge-1, .badge-2 { display: none; }
  .hero-actions { flex-direction: column; }
  .stat-item {
    text-align: center;
  }
  .hero-stats {
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .brands-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .highlight-box {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  .contact-item {
    flex-wrap: wrap;
  }
  .section-title {
    font-size: 2rem;
  }
  .service-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  html, body {
    max-width: 100vw;
    overflow-x: hidden;
  }
  .container {
    padding: 0 15px;
  }
  .hero-content h1 {
    font-size: 2rem;
  }
  .main-hero-card {
    padding: 32px 16px;
  }
}