/* Modern design system with improved typography, spacing, and visual hierarchy */
/* Přidávám lepší hover efekty, profesionálnější layout a vylepšenou typografii */

:root {
  --primary-color: #0b2181;
  --secondary-color: #1859ad;
  --accent-color: #1dc7d3;
  --light-color: #ffffff;
  --dark-color: #111827;
  --gray-color: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px 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-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  background-color: var(--light-color);
  color: var(--gray-600);
  line-height: 1.8;
  font-size: 16px;
}

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

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Styles - Profesionální header */
header {
  background: linear-gradient(135deg, var(--primary-color) 0%, #0a1a5e 100%);
  color: var(--light-color);
  padding: 0.8rem 2rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  border-bottom: 3px solid var(--accent-color);
}

.logo-container {
  display: flex;
  align-items: center;
  margin-bottom: 0.8rem;
  gap: 1.2rem;
}

.logo {
  height: 45px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: var(--transition);
}

.logo:hover {
  transform: scale(1.08);
}

header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.2rem;
}

.nav-links li {
  position: relative;
}

.nav-links a {
  color: var(--light-color);
  padding: 0.7rem 1.1rem;
  border-radius: 6px;
  transition: var(--transition);
  font-weight: 500;
  font-size: 0.93rem;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 5px;
  left: 1.1rem;
  right: 1.1rem;
  height: 2px;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transform-origin: right;
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  background-color: rgba(29, 199, 211, 0.2);
  color: var(--accent-color);
}

.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

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

.dropdown-content {
  display: none;
  position: absolute;
  background-color: var(--light-color);
  color: var(--dark-color);
  min-width: 230px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
  z-index: 1;
  border-radius: 10px;
  overflow: hidden;
  transform: translateY(15px) scale(0.95);
  opacity: 0;
  transition: var(--transition);
  top: 100%;
  margin-top: 0.5rem;
  border: 1px solid rgba(29, 199, 211, 0.2);
}

.dropdown-content a {
  color: var(--gray-600);
  padding: 0.9rem 1.3rem;
  display: block;
  text-align: left;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.dropdown-content a:hover {
  background-color: rgba(29, 199, 211, 0.1);
  color: var(--primary-color);
  padding-left: 1.6rem;
}

.dropdown:hover .dropdown-content {
  display: block;
  transform: translateY(0) scale(1);
  opacity: 1;
}

.dropbtn i {
  margin-left: 6px;
  font-size: 0.75rem;
  transition: var(--transition);
}

.dropdown:hover .dropbtn i {
  transform: rotate(180deg) translateY(-2px);
  color: var(--accent-color);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--accent-color);
}

.menu-toggle:hover {
  transform: scale(1.15);
}

/* Hero Section - Dinamičtější */
.hero {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #0d4a7a 50%, var(--primary-color) 100%);
  background-size: cover;
  background-position: center;
  color: var(--light-color);
  text-align: center;
  padding: 9rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(29, 199, 211, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(29, 199, 211, 0.08) 0%, transparent 50%);
  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.05), transparent);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero h2 {
  font-size: 3.8rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  animation: fadeInDown 0.8s ease;
  line-height: 1.15;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
  font-weight: 400;
  letter-spacing: 0.3px;
}

.btn {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--primary-color);
  padding: 1rem 2.8rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 10px 25px rgba(29, 199, 211, 0.3);
  border: 2px solid transparent;
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
  cursor: pointer;
  font-size: 1rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.btn:hover {
  background-color: var(--light-color);
  color: var(--secondary-color);
  transform: translateY(-6px);
  box-shadow: 0 15px 40px rgba(29, 199, 211, 0.4);
}

.btn-small {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--primary-color);
  padding: 0.8rem 1.9rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 8px 16px rgba(29, 199, 211, 0.25);
  cursor: pointer;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.btn-small:hover {
  background-color: var(--light-color);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(29, 199, 211, 0.35);
  color: var(--secondary-color);
}

/* Features Section - Lepší grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  padding: 8rem 2rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(243, 244, 246, 0.6) 100%);
  position: relative;
}

.feature-card {
  background-color: var(--light-color);
  padding: 2.8rem;
  border-radius: 16px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--gray-200);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  opacity: 0;
  z-index: -1;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-16px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  color: var(--light-color);
  border-color: transparent;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card i {
  font-size: 3.8rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background-color: rgba(29, 199, 211, 0.12);
  border-radius: 50%;
}

.feature-card:hover i {
  color: var(--light-color);
  background-color: rgba(255, 255, 255, 0.25);
  transform: scale(1.15) rotateZ(5deg);
}

.feature-card h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-size: 1.55rem;
  font-weight: 700;
  transition: var(--transition);
  letter-spacing: -0.3px;
}

.feature-card:hover h3 {
  color: var(--light-color);
}

.feature-card p {
  margin-bottom: 1.5rem;
  transition: var(--transition);
  color: var(--gray-500);
  line-height: 1.8;
}

.feature-card:hover p {
  color: rgba(255, 255, 255, 0.95);
}

/* News Section */
.news {
  padding: 8rem 2rem;
  background-color: var(--light-color);
  position: relative;
}

.news h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  font-size: 3rem;
  font-weight: 800;
  position: relative;
  letter-spacing: -0.5px;
}

.news h2::after {
  content: "";
  position: absolute;
  bottom: -25px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 5px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color), var(--accent-color));
  border-radius: 3px;
}

.news-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  margin: 5rem auto 0;
}

.news-card {
  background-color: var(--light-color);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--accent-color);
}

.news-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: var(--transition);
}

.news-card:hover img {
  transform: scale(1.1);
}

.news-content {
  padding: 2.2rem;
}

.news-content h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.2px;
}

.news-content p {
  color: var(--gray-500);
  margin-bottom: 1.2rem;
  line-height: 1.8;
}

.date {
  display: block;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--gray-200);
  color: var(--gray-500);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

/* Footer */
footer {
  background: linear-gradient(135deg, var(--primary-color) 0%, #0a1a5e 100%);
  color: var(--light-color);
  padding: 5.5rem 2rem 1.5rem;
  border-top: 3px solid var(--accent-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3.5rem;
  margin-bottom: 3rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-logo h3 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 0.5rem;
}

.footer-links h4,
.footer-contact h4,
.footer-social h4 {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  position: relative;
  display: inline-block;
  letter-spacing: -0.2px;
}

.footer-links h4::after,
.footer-contact h4::after,
.footer-social h4::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 55px;
  height: 3px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

.footer-links ul li {
  margin-bottom: 0.95rem;
}

.footer-links a {
  transition: var(--transition);
  position: relative;
  display: inline-block;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}

.footer-links a::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: var(--transition);
}

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

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

.footer-contact p {
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}

.footer-contact i {
  margin-right: 0.9rem;
  width: 22px;
  color: var(--accent-color);
}

.social-icons {
  display: flex;
  gap: 1rem;
  margin-top: 1.8rem;
}

.social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: rgba(29, 199, 211, 0.2);
  border-radius: 50%;
  transition: var(--transition);
  border: 1.5px solid rgba(29, 199, 211, 0.4);
  color: var(--accent-color);
  font-size: 1.15rem;
}

.social-icons a:hover {
  background-color: var(--accent-color);
  color: var(--primary-color);
  transform: translateY(-7px) scale(1.1);
  border-color: var(--accent-color);
}

.footer-bottom {
  text-align: center;
  padding: 2.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 1200px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Page Header */
.page-header {
  background: linear-gradient(
    135deg,
    rgba(11, 33, 129, 0.95) 0%,
    rgba(13, 74, 122, 0.95) 50%,
    rgba(11, 33, 129, 0.95) 100%
  );
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--light-color);
  text-align: center;
  padding: 6.5rem 2rem;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 50%, rgba(29, 199, 211, 0.15) 0%, transparent 50%);
}

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

.page-header h2 {
  font-size: 3.2rem;
  margin-bottom: 1rem;
  font-weight: 800;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  letter-spacing: -0.5px;
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a1a5e 100%);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    transition: left 0.4s ease;
    z-index: 1001;
    overflow-y: auto;
    gap: 0;
  }

  .nav-links.active {
    left: 0;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
  }

  .nav-links li {
    margin: 0.6rem 0;
    width: 100%;
  }

  .nav-links a {
    padding: 1rem;
    font-size: 1rem;
  }

  .dropdown-content {
    position: static;
    display: none;
    width: calc(100% - 2rem);
    box-shadow: none;
    margin: 0.5rem 1rem;
    padding: 0.5rem 0;
    transform: none;
    opacity: 1;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
  }

  .dropdown-content a {
    color: var(--light-color);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .dropdown-content a:hover {
    background-color: rgba(29, 199, 211, 0.2);
    color: var(--accent-color);
  }

  .dropdown.active .dropdown-content {
    display: block;
  }

  .hero {
    padding: 5.5rem 1.5rem;
  }

  .hero h2 {
    font-size: 2.3rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .features {
    padding: 4.5rem 1.5rem;
    grid-template-columns: 1fr;
  }

  .news {
    padding: 4.5rem 1.5rem;
  }

  .news-container {
    grid-template-columns: 1fr;
  }

  .footer-content > div {
    flex: 1 1 100%;
  }

  .page-header {
    padding: 4.5rem 1.5rem;
  }

  .page-header h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1rem;
  }

  .hero {
    padding: 3rem 1rem;
  }

  .hero h2 {
    font-size: 1.7rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .btn {
    padding: 0.8rem 1.8rem;
    font-size: 0.9rem;
  }

  .news h2 {
    font-size: 2rem;
  }

  .feature-card,
  .news-card {
    min-width: 100%;
    max-width: 100%;
  }
}