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

:root {
  /* Colors */
  --bg-primary: #050a18; /* Deepest brand navy */
  --bg-secondary: #0b132b; /* Lighter brand navy */
  --bg-tertiary: rgba(11, 19, 43, 0.75); /* Glassmorphism background */
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  
  --accent-primary: #00a2e8; /* Brand sky blue (from "Klíma") */
  --accent-hover: #0087c2;
  
  --accent-red: #e21b22; /* Brand red (from "Sas") */
  --accent-red-hover: #c11219;
  
  --border-color: rgba(0, 162, 232, 0.15);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Typography */
  --font-family: 'Inter', sans-serif;
  
  /* Utilities */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

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

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

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  font-family: var(--font-family);
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 162, 232, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.section {
  padding: var(--space-xl) 0;
}

.bg-secondary {
  background-color: var(--bg-secondary);
}

.glass-panel {
  background: var(--bg-tertiary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform var(--transition-normal);
}

.glass-panel:hover {
  transform: translateY(-5px);
}

/* Layout Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.grid { display: grid; }
.text-center { text-align: center; }
.text-accent { color: var(--accent-primary); }
.text-red { color: var(--accent-red); }
.text-secondary { color: var(--text-secondary); }

section[id] {
  scroll-margin-top: 80px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-secondary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* Navbar styles */
.navbar {
  padding: 1rem 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}
.navbar .logo h2 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 1px;
}
.nav-links {
  display: none;
  gap: var(--space-md);
  align-items: center;
}
.navbar-btn {
  display: none;
}
.mobile-menu-btn {
  display: block;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-primary);
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  background-image: url('images/hero.png');
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 2rem;
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to right, rgba(15,23,42,0.95) 0%, rgba(15,23,42,0.6) 100%);
}
.hero-content {
  max-width: 800px;
  width: 100%;
}
.hero-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(0, 162, 232, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(0, 162, 232, 0.2);
  border-radius: 2rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.hero-title {
  margin-bottom: 1.5rem;
}
.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
}
.button-group {
  flex-wrap: wrap;
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.service-card {
  padding: 2rem;
}
.service-card h3 {
  font-size: 1.25rem;
  margin: 0.5rem 0;
}
.icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background-color: rgba(0, 162, 232, 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}
.about-image-container {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.about-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.experience-badge {
  position: absolute;
  bottom: 0px;
  left: 0px;
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  text-align: center;
  font-weight: 600;
  transform: translate(20px, -20px);
}
.experience-badge span {
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent-primary);
}
.about-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.about-list-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.1rem;
  font-weight: 500;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}
.info-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.1rem;
  padding: 0.5rem 0;
}
.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.input-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.form-input {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}
.form-input:focus {
  border-color: var(--accent-primary);
}

/* Footer */
.footer {
  background-color: var(--bg-primary);
  padding-top: 4rem;
  border-top: 1px solid var(--border-color);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-column h4 {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}
.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.footer-link {
  color: var(--text-secondary);
  transition: color 0.2s;
}
.footer-bottom {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-color);
}

/* Scroll To Top */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 99;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease, box-shadow 0.2s ease;
  pointer-events: none;
}
.scroll-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.scroll-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 162, 232, 0.4);
  transition: transform 0.2s, background-color 0.2s;
}
.scroll-btn:hover {
  background-color: var(--accent-hover);
  transform: scale(1.1);
}

/* Responsive styles */
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .navbar-btn {
    display: block;
  }
  .mobile-menu-btn {
    display: none;
  }
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .section {
    padding: var(--space-lg) 0;
  }
  .hero-section {
    padding-top: 100px;
  }
}