:root {
  /* Color System */
  --color-background: #f9fafb;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #6b7280;

  /* Premium accent palette (modern, bright, elegant) */
  --color-primary: #0ea5e9; /* sky blue accent */
  --color-primary-soft: rgba(14, 165, 233, 0.08);
  --color-primary-strong: #0284c7;

  --color-success: #22c55e;
  --color-warning: #facc15;
  --color-danger: #ef4444;

  /* Neutral grays */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-display: "Poppins", "SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.6;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radii */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 9999px;

  /* Shadows (subtle premium look) */
  --shadow-soft: 0 10px 25px rgba(15, 23, 42, 0.06);
  --shadow-medium: 0 18px 45px rgba(15, 23, 42, 0.12);
  --shadow-strong: 0 24px 60px rgba(15, 23, 42, 0.16);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 320ms ease-out;
}

/*
  RESET / NORMALIZE
  ------------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
 h1,
 h2,
 h3,
 h4,
 h5,
 h6,
 p,
 figure,
 blockquote,
 dl,
 dd {
  margin: 0;
}

body {
  min-height: 100vh;
}

img,
 picture,
 video,
 canvas,
 svg {
  display: block;
  max-width: 100%;
}

input,
 button,
 textarea,
 select {
  font: inherit;
}

button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

ul,
 ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/*
  BASE STYLES
  ------------------------------------------------------------------ */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

h1,
 h2,
 h3,
 h4,
 h5,
 h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

p:last-child {
  margin-bottom: 0;
}

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

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

strong {
  font-weight: 600;
}

hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: var(--space-8) 0;
}

/*
  UTILITIES
  ------------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section--tight {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

/* Flex helpers */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

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

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

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

/* Grid helpers */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

.text-right {
  text-align: right;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/*
  COMPONENTS
  ------------------------------------------------------------------ */

/* Buttons - premium, minimal, used for CTAs like "Rezervovat událost" */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-soft);
}

.btn-outline {
  background-color: rgba(255, 255, 255, 0.9);
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--color-text);
  backdrop-filter: blur(16px);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background-color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

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

/* Form inputs (for contact & event request forms) */
.input,
.textarea,
.select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--gray-400);
}

.input:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(14, 165, 233, 0.35);
}

.textarea {
  min-height: 140px;
  resize: vertical;
}

.input--invalid,
.textarea--invalid,
.select--invalid {
  border-color: var(--color-danger);
}

.field-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--gray-800);
}

.field-description {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  margin-top: 0.25rem;
}

.field-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: 0.25rem;
}

/* Card - for event highlights, experiences, etc. */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-soft);
}

.card--hoverable {
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.card-header {
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-1);
}

.card-meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
}

/* Hero section helpers (for rotating background slider) */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  color: #ffffff;
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -2;
}

.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: cover;
  opacity: 0;
  transition: opacity 800ms ease-in-out;
}

.hero-slide.is-active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(15, 23, 42, 0.35), transparent 55%),
              linear-gradient(to bottom, rgba(15, 23, 42, 0.65), rgba(15, 23, 42, 0.85));
  z-index: -1;
}

.hero-content {
  position: relative;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.hero-eyebrow {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(226, 232, 240, 0.88);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  max-width: 34rem;
  font-size: var(--font-size-lg);
  color: rgba(241, 245, 249, 0.9);
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Header layout helpers (logo centered, nav split) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 4.25rem;
}

.site-header-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  max-width: 1120px;
  padding: 0 var(--space-4);
}

.site-nav-left,
.site-nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav-left {
  justify-content: flex-end;
}

.site-nav-right {
  justify-content: flex-start;
}

.site-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.site-logo-text-main {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-900);
}

.site-logo-text-sub {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gray-400);
}

.site-nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.4rem 0.1rem;
  position: relative;
  white-space: nowrap;
}

.site-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.1rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-strong));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.site-nav-link:hover {
  color: var(--gray-900);
}

.site-nav-link:hover::after,
.site-nav-link--active::after {
  transform: scaleX(1);
}

.site-nav-link--active {
  color: var(--gray-900);
}

.site-header-cta {
  justify-content: flex-start;
}

/* Responsive navigation */
.site-header-toggle {
  display: none;
}

@media (max-width: 768px) {
  .site-header-nav {
    grid-template-columns: auto 1fr auto;
  }

  .site-nav-left,
  .site-nav-right {
    display: none;
  }

  .site-header-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
  }
}

/* Gallery grid helper */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform var(--transition-slow);
}

.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.45), transparent 55%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.gallery-item:hover img {
  transform: scale(1.06);
}

.gallery-item:hover::after {
  opacity: 1;
}

/*
  ACCESSIBILITY & MOTION
  ------------------------------------------------------------------ */

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

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}