/* Reset a základní styly */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #33b5e5;
  --color-primary-dark: #2196c9;
  --color-secondary: #e63946;
  --color-accent: #f4a261;
  --color-light: #f8f9fa;
  --color-dark: #212529;
  --color-gray: #6c757d;
  --color-gray-light: #e9ecef;

  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-light);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.header {
  background: white;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.logo img {
  height: 50px;
  width: auto;
}

/* Navigace */
.nav-list {
  display: flex;
  list-style: none;
  gap: 0.5rem;
}

.nav-list > li > a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-dark);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}

.nav-list > li > a:hover {
  background: var(--color-gray-light);
  color: var(--color-primary);
}

/* Dropdown arrow */
.dropdown-arrow {
  font-size: 0.7em;
  margin-left: 0.25rem;
  transition: transform 0.2s;
}

.has-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

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

.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  list-style: none;
  padding: 0.5rem 0;
  z-index: 101;
}

.has-dropdown:hover .dropdown {
  display: block;
}

.dropdown li a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-dark);
  transition: background 0.2s;
}

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

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* Main content */
.main {
  min-height: calc(100vh - 200px);
}

/* Hero sekce */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 4rem 1rem;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Sekce */
.section {
  padding: 4rem 1rem;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  color: var(--color-primary);
}

/* Karty */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-content {
  padding: 1.5rem;
}

.card-title {
  margin-bottom: 0.5rem;
}

.card-date {
  color: var(--color-gray);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

/* Tlačítka */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: white;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: #c1121f;
  color: white;
}

/* Tabulky (pro výsledky) */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-light);
}

th {
  background: var(--color-primary);
  color: white;
  font-weight: 600;
}

tr:hover {
  background: var(--color-gray-light);
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: white;
  padding: 3rem 1rem 1rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h3 {
  color: var(--color-accent);
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.footer-col p {
  color: rgba(255,255,255,0.8);
}

.footer-col a {
  color: rgba(255,255,255,0.8);
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  color: white;
  transition: background 0.2s;
}

.social-links a:hover {
  background: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem;
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
}

/* Page header */
.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 3rem 1rem;
  text-align: center;
}

.page-header h1 {
  margin-bottom: 0.5rem;
}

.page-content {
  padding: 3rem 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
  }

  .nav.active {
    display: block;
  }

  .nav-list {
    flex-direction: column;
  }

  .dropdown {
    position: static;
    box-shadow: none;
    padding-left: 1rem;
    display: none;
  }

  .has-dropdown:hover .dropdown,
  .has-dropdown.active .dropdown {
    display: block;
  }

  .hero h1 {
    font-size: 2rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}