/* ==========================================================================
   Modern Dental Clinic Styles
   Dent-Aktiv Website
   ========================================================================== */

/* Root Variables */
:root {
  /* Colors */
  --primary-color: #2c5aa0;
  --primary-hover: #1e3f73;
  --secondary-color: #ffffff;
  --accent-color: #4CAF50;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --background-light: #f8f9fa;
  --background-white: #ffffff;
  --border-color: #e9ecef;
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.2);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-h1: 48px;
  --font-size-h2: 36px;
  --font-size-h3: 24px;
  --font-size-h4: 20px;
  --line-height-base: 1.6;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 64px;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 8px;
  --border-radius-large: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--background-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--primary-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  min-height: 48px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--secondary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

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

.btn-large {
  padding: 16px 32px;
  font-size: var(--font-size-large);
  min-height: 56px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--background-white);
  box-shadow: var(--shadow-light);
  z-index: 1000;
}

.header-top {
  background-color: var(--primary-color);
  color: var(--secondary-color);
  padding: var(--spacing-xs) 0;
}

.header-top-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.working-hours {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-small);
}

.header-phones {
  display: flex;
  gap: var(--spacing-md);
}

.phone-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--secondary-color);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
}

.phone-link:hover {
  color: var(--secondary-color);
  opacity: 0.8;
}

.header-main {
  padding: var(--spacing-sm) 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation */
.main-nav {
  display: flex;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  position: relative;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-color);
}

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

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--background-white);
  box-shadow: var(--shadow-medium);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm);
  min-width: 250px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  z-index: 1000;
}

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

.dropdown-menu li {
  margin-bottom: var(--spacing-xs);
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--text-secondary);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.dropdown-menu a:hover {
  background-color: var(--background-light);
  color: var(--primary-color);
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.header-btn {
  margin-left: var(--spacing-md);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-top: 120px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -2;
}

.hero-background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(44, 90, 160, 0.8) 0%, 
    rgba(44, 90, 160, 0.6) 50%, 
    rgba(76, 175, 80, 0.3) 100%);
  z-index: 1;
}

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

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-text {
  max-width: 600px;
  color: var(--secondary-color);
}

.hero-title {
  font-size: 56px;
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.highlight {
  color: var(--accent-color);
  display: block;
}

.hero-description {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Section Common Styles */
section {
  padding: var(--spacing-xxl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section-title {
  margin-bottom: var(--spacing-sm);
}

.section-description {
  font-size: var(--font-size-large);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Advantages Section */
.advantages {
  background-color: var(--background-light);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.advantage-card {
  background-color: var(--background-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-large);
  text-align: center;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.advantage-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 32px;
  color: var(--secondary-color);
}

.advantage-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  background-color: var(--background-white);
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

.service-image {
  height: 200px;
  overflow: hidden;
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.service-card:hover .service-image img {
  transform: scale(1.05);
}

.service-content {
  padding: var(--spacing-lg);
}

.service-content h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

/* Doctor Section */
.doctor {
  background-color: var(--background-light);
}

.doctor-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.doctor-image {
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

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

.doctor-info h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-medium);
}

.doctor-info h3 {
  margin-bottom: var(--spacing-md);
}

.doctor-credentials {
  margin-bottom: var(--spacing-md);
}

.doctor-credentials p {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-small);
}

.doctor-credentials strong {
  color: var(--text-primary);
}

.doctor-description {
  font-size: var(--font-size-large);
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--secondary-color);
}

.cta-content {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.cta-text h2 {
  color: var(--secondary-color);
  margin-bottom: var(--spacing-sm);
}

.cta-text p {
  color: rgba(255, 255, 255, 0.9);
}

.cta-form {
  background-color: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-large);
  backdrop-filter: blur(10px);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--secondary-color);
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  background-color: rgba(255, 255, 255, 0.2);
}

.cta-image {
  border-radius: var(--border-radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-heavy);
}

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

/* Footer */
.footer {
  background-color: var(--text-primary);
  color: var(--secondary-color);
  padding: var(--spacing-xxl) 0 var(--spacing-md);
}

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

.footer-section h4 {
  margin-bottom: var(--spacing-md);
  color: var(--accent-color);
}

.footer-description {
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.8);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-color);
  transition: var(--transition);
}

.social-link:hover {
  background-color: var(--accent-color);
  color: var(--secondary-color);
}

.footer-contact p,
.working-schedule p {
  margin-bottom: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact a {
  color: var(--secondary-color);
}

.footer-services {
  list-style: none;
}

.footer-services li {
  margin-bottom: var(--spacing-xs);
}

.footer-services a {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-legal p {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.6);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

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

/* Scroll to Top */
.scroll-to-top {
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: var(--secondary-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1000;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 2000;
}

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

.modal-content {
  background-color: var(--background-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-large);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-md);
  font-size: 24px;
  cursor: pointer;
  color: var(--text-light);
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--text-primary);
}

.success-content {
  text-align: center;
}

.success-icon {
  font-size: 64px;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
}

.success-content h3 {
  color: var(--accent-color);
  margin-bottom: var(--spacing-sm);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Focus Styles */
*:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

button:focus,
.btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .header,
  .scroll-to-top,
  .modal {
    display: none !important;
  }
}