/* ============================================
   agntec.com - Main Stylesheet
   Unified design system for all pages
   ============================================ */

/* CSS Custom Properties - Brand Colors & Typography */
:root {
  /* Brand Colors */
  --brand-gradient: linear-gradient(135deg, #acb6e2 0%, #9bdee7 100%);
  --primary-blue: #2c5282;
  --accent-cyan: #9bdee7;
  --accent-purple: #acb6e2;
  --text-dark: #1a365d;
  --text-medium: #4a5568;
  --bg-light: #f5f5f5;
  --bg-lighter: #f9f9fb;
  --white-glass: rgba(255, 255, 255, 0.95);
  --white-solid: #ffffff;

  /* Typography */
  --font-primary: 'Arial', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

  /* Spacing */
  --container-max-width: 1200px;
  --container-padding: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Base Styles
   ============================================ */

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: #333;
  background: var(--brand-gradient);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   Skip to Content Link (Accessibility)
   ============================================ */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-blue);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100000;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  top: 0;
}

/* ============================================
   Navigation - Unified across all pages
   ============================================ */

nav {
  background: var(--white-glass);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  padding: 15px 0;
  position: relative;
  z-index: 100;
  border-bottom: 1px solid rgba(172, 182, 226, 0.2);
}

nav a {
  text-decoration: none;
  color: var(--primary-blue);
  font-weight: 600;
  transition: color 0.3s ease;
  position: relative;
}

nav a:hover {
  color: var(--accent-cyan);
}

nav a:focus-visible {
  outline: 3px solid var(--primary-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Mobile Navigation Toggle (Hidden by default) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  position: absolute;
  left: 20px;
  z-index: 101;
}

.hamburger {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--primary-blue);
  position: relative;
  transition: background 0.3s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 2px;
  background: var(--primary-blue);
  transition: transform 0.3s ease;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
  margin: 0;
  padding: 0;
}

/* Language Switcher */
.language-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding-right: 20px;
}

.lang-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-blue);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.3s;
}

.lang-link:hover,
.lang-link.active {
  opacity: 1;
}

.lang-separator {
  color: var(--text-medium);
  opacity: 0.5;
}

/* ============================================
   Container
   ============================================ */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 10;
}

/* ============================================
   Header
   ============================================ */

header {
  text-align: center;
  padding: 60px 20px 40px;
}

.logo {
  width: 400px;
  height: auto;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  text-align: center;
  padding: 40px 0 60px;
  color: white;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 300;
  margin-bottom: 20px;
  text-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.05em;
}

.hero .subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  text-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.02em;
  max-width: 900px;
  margin: 0 auto;
}

/* ============================================
   Main Content Sections
   ============================================ */

main {
  padding: 40px 20px;
  max-width: 960px;
  margin: 0 auto;
}

.content-section {
  background: var(--white-glass);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  margin: 40px 0;
  padding: 60px 40px;
  box-shadow: var(--shadow-lg);
}

.section-title {
  font-size: 2.5rem;
  color: var(--primary-blue);
  margin-bottom: 30px;
  font-weight: 300;
  text-align: center;
  letter-spacing: 0.02em;
}

.section-text {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 25px;
  color: var(--text-medium);
}

/* ============================================
   Highlight Boxes
   ============================================ */

.highlight-box {
  background: linear-gradient(135deg, rgba(172, 182, 226, 0.2) 0%, rgba(155, 222, 231, 0.2) 100%);
  padding: 40px;
  border-radius: 15px;
  border: 1px solid rgba(172, 182, 226, 0.3);
  margin: 40px 0;
  position: relative;
  overflow: hidden;
}

.highlight-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
}

.highlight-box p {
  margin-bottom: 0;
  font-size: 1.2rem;
  color: var(--primary-blue);
  font-weight: 400;
  line-height: 1.7;
}

.highlight {
  background-color: #f0f8ff;
  border-left: 4px solid #3498db;
  padding: 16px;
  margin: 1rem 0;
  border-radius: 4px;
}

/* ============================================
   Service Cards Grid
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.service-card {
  background: rgba(255, 255, 255, 0.9);
  padding: 30px;
  border-radius: 15px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(172, 182, 226, 0.2);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.service-card h3 {
  color: var(--primary-blue);
  font-size: 1.3rem;
  margin-bottom: 15px;
  font-weight: 400;
}

.service-card p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-medium);
}

/* ============================================
   Comparison / Pair Container
   ============================================ */

.pair-container {
  display: flex;
  gap: 40px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.comparison-item {
  flex: 1 1 400px;
  background: white;
  border-left: 4px solid #3182ce;
  padding: 20px;
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
}

/* ============================================
   Call-to-Action Section
   ============================================ */

.cta-section {
  text-align: center;
  padding: 60px 0;
  color: white;
}

.cta-section h2 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 20px;
  text-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
  font-weight: 300;
}

.cta-section p {
  font-size: 1.3rem;
  margin-bottom: 30px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  background: var(--white-glass);
  color: var(--primary-blue);
  padding: 18px 40px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.25);
  background: var(--white-solid);
}

.btn:focus-visible {
  outline: 3px solid var(--primary-blue);
  outline-offset: 2px;
}

/* ============================================
   Footer
   ============================================ */

footer {
  background: rgba(44, 82, 130, 0.9);
  color: white;
  text-align: center;
  padding: 40px 0;
  backdrop-filter: blur(10px);
}

footer p {
  opacity: 0.9;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  margin: 5px 0;
}

footer a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

footer a:hover {
  opacity: 1;
  color: white;
}

footer a:focus-visible {
  outline: 2px solid white;
  outline-offset: 2px;
  border-radius: 2px;
}

/* ============================================
   Typography - Headers, Lists, etc.
   ============================================ */

h1, h2 {
  color: var(--text-dark);
}

h2 {
  color: var(--primary-blue);
  margin-top: 2rem;
}

h3 {
  color: #0182cb;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

ul {
  padding-left: 20px;
  margin-bottom: 1rem;
}

/* ============================================
   Focus Indicators (Accessibility)
   ============================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--primary-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ============================================
   Profile Image (Resume page)
   ============================================ */

img.profile {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #3498db;
  margin-bottom: 1rem;
}

/* ============================================
   Impressum Modal
   ============================================ */

#impressum-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: 20000;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(5px);
}

#impressum-modal .modal-content {
  background: white;
  padding: 50px;
  border-radius: 20px;
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  position: relative;
}

#impressum-modal .close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--primary-blue);
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.3s ease;
}

#impressum-modal .close-btn:hover {
  background: rgba(172, 182, 226, 0.2);
}

#impressum-modal h2 {
  color: var(--primary-blue);
  font-size: 2.5rem;
  margin-bottom: 30px;
  font-weight: 300;
}

#impressum-modal h3 {
  color: var(--primary-blue);
  font-size: 1.3rem;
  margin-top: 25px;
  margin-bottom: 15px;
  font-weight: 400;
}

#impressum-modal h4 {
  color: var(--primary-blue);
  font-size: 1.1rem;
  margin-top: 20px;
  margin-bottom: 10px;
  font-weight: 400;
}

#impressum-modal .modal-body {
  color: var(--text-medium);
  line-height: 1.8;
}

#impressum-modal p {
  margin-bottom: 15px;
}

#impressum-modal a {
  color: var(--primary-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--primary-blue);
}

/* ============================================
   Testimonials
   ============================================ */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.testimonial-card {
  background: white;
  padding: 30px;
  border-radius: 15px;
  border-left: 4px solid var(--accent-cyan);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.testimonial-card blockquote {
  margin: 0 0 20px 0;
  font-style: italic;
  color: var(--text-medium);
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.testimonial-author strong {
  color: var(--primary-blue);
  font-weight: 600;
}

.testimonial-author span {
  color: var(--text-medium);
  font-size: 0.9rem;
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-section {
  margin: 40px 0;
}

.faq-list {
  margin-top: 30px;
}

.faq-item {
  background: white;
  margin-bottom: 15px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(172, 182, 226, 0.15);
}

.faq-item summary {
  padding: 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--primary-blue);
  list-style: none;
  position: relative;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
  transform: translateY(-50%) rotate(180deg);
}

.faq-item p {
  padding: 0 20px 20px 20px;
  color: var(--text-medium);
  line-height: 1.7;
}

/* ============================================
   Translation Notice
   ============================================ */

.translation-notice {
  background: #fff3cd;
  border: 1px solid #ffc107;
  padding: 15px 20px;
  border-radius: 8px;
  margin: 20px 0;
  text-align: center;
  color: #856404;
  font-weight: 500;
}

/* ============================================
   Responsive Design - Mobile First
   ============================================ */

/* Tablet */
@media (max-width: 768px) {
  /* Navigation Mobile Menu */
  .nav-toggle {
    display: block;
  }

  nav {
    flex-wrap: wrap;
    padding: 15px 20px;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    text-align: center;
    margin-top: 15px;
    gap: 15px;
  }

  .nav-menu.active {
    display: flex;
  }

  .language-switcher {
    margin-left: 0;
    padding-right: 0;
    position: absolute;
    right: 20px;
    top: 15px;
  }

  /* Logo sizes */
  .logo {
    width: 320px;
  }

  /* Hero */
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero .subtitle {
    font-size: 1.2rem;
  }

  /* Sections */
  .section-title {
    font-size: 2rem;
  }

  .content-section {
    padding: 40px 25px;
    margin: 20px 0;
  }

  /* Grids */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* CTA */
  .cta-section h2 {
    font-size: 2rem;
  }

  .cta-section p {
    font-size: 1.1rem;
  }

  /* Modal */
  #impressum-modal .modal-content {
    padding: 40px 30px;
    margin: 20px;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .logo {
    width: 280px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .content-section {
    padding: 30px 20px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .cta-section h2 {
    font-size: 1.8rem;
  }

  .btn {
    padding: 15px 30px;
    font-size: 1rem;
  }

  #impressum-modal .modal-content {
    padding: 30px 20px;
    margin: 10px;
  }

  #impressum-modal h2 {
    font-size: 2rem;
  }
}

/* Large Desktop */
@media (min-width: 1024px) {
  .container {
    padding: 0 40px;
  }
}