/* =============================================
   Variables
   =========================================== */
:root {
  /* Color Palette - premium blue / ivory / glass */
  --color-bg: #f5f7fb;
  --color-bg-soft: #f9fafc;
  --color-bg-ivory: #fdfaf5;
  --color-bg-glass: rgba(255, 255, 255, 0.78);
  --color-bg-glass-strong: rgba(248, 251, 255, 0.9);

  --color-text: #0f172a; /* deep navy for primary text */
  --color-text-soft: #4b5563;
  --color-text-muted: #6b7280;
  --color-text-on-dark: #f9fafb;

  --color-primary: #2563eb; /* premium sky blue */
  --color-primary-soft: #dbeafe;
  --color-primary-soft-2: #eff6ff;
  --color-primary-dark: #1d4ed8;
  --color-primary-gradient-start: #38bdf8; /* light cyan */
  --color-primary-gradient-end: #1d4ed8; /* deep blue */

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2933;
  --color-gray-900: #0b1120;

  --color-border-subtle: rgba(148, 163, 184, 0.35);
  --color-border-strong: rgba(15, 23, 42, 0.12);

  /* Gradients - hero & CTAs */
  --gradient-hero: radial-gradient(circle at top left, rgba(191, 219, 254, 0.65), transparent 55%), linear-gradient(135deg, #e0f2fe 0%, #eff6ff 50%, #dbeafe 100%);
  --gradient-primary: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
  --gradient-nav: linear-gradient(120deg, rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.65));

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-display: "SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, 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: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* 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 */

  /* Radius */
  --radius-xs: 0.375rem; /* 6px */
  --radius-sm: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;  /* 12px */
  --radius-lg: 1rem;     /* 16px */
  --radius-xl: 1.5rem;   /* 24px */
  --radius-full: 999px;

  /* Shadows - soft, premium */
  --shadow-xs: 0 8px 18px rgba(15, 23, 42, 0.12);
  --shadow-sm: 0 14px 30px rgba(15, 23, 42, 0.16);
  --shadow-md: 0 24px 60px rgba(15, 23, 42, 0.22);
  --shadow-soft-inner: inset 0 0 0 1px rgba(148, 163, 184, 0.18);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 220ms ease-out;
  --transition-slow: 380ms ease-out;
}

/* =============================================
   Reset / Normalize
   =========================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none !important; /* required technical note */
}

a {
  text-decoration: none;
  color: inherit;
}

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

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

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

textarea {
  resize: vertical;
}

/* =============================================
   Base Styles
   =========================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  background: radial-gradient(circle at top, #e0f2fe 0, transparent 60%), var(--color-bg);
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 650;
  line-height: var(--line-height-snug);
  color: var(--color-gray-900);
}

h1 {
  font-size: clamp(var(--font-size-3xl), 3vw + 1.5rem, var(--font-size-5xl));
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(var(--font-size-2xl), 2.2vw + 1rem, var(--font-size-4xl));
  letter-spacing: -0.02em;
}

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

h4 {
  font-size: var(--font-size-xl);
}

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

strong {
  font-weight: 600;
}

small {
  font-size: var(--font-size-sm);
}

/* Links - premium hover treatment */
a {
  position: relative;
  transition: color var(--transition-base), opacity var(--transition-base);
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.2), rgba(56, 189, 248, 0.6));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
  pointer-events: none;
}

a:hover::after,
a:focus-visible::after {
  transform: scaleX(1);
}

/* Required technical note for anchor hover */
a:hover {
  color: #fff !important;
}

/* =============================================
   Layout Utilities
   =========================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 1280px) {
  .container {
    max-width: 1240px;
  }
}

.section {
  padding-block: var(--space-16);
}

.section--compact {
  padding-block: var(--space-10);
}

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

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

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

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

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Spacing utilities (margin/padding) */
.mt-0 { margin-top: 0 !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }
.mt-10 { margin-top: var(--space-10) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }
.mb-10 { margin-bottom: var(--space-10) !important; }

.pt-0 { padding-top: 0 !important; }
.pb-0 { padding-bottom: 0 !important; }

/* Hero wrapper helper for cinematic layout */
.hero {
  position: relative;
  min-height: min(80vh, 720px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-16);
  color: var(--color-text-on-dark);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.55)), radial-gradient(circle at top left, rgba(56, 189, 248, 0.35), transparent 55%);
  mix-blend-mode: multiply;
}

.hero__background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.35));
}

.hero__panel {
  position: relative;
  max-width: 720px;
  margin-inline: auto;
  padding: var(--space-6) var(--space-6);
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at top left, rgba(191, 219, 254, 0.35), transparent 55%), var(--color-bg-glass);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.7);
  backdrop-filter: blur(18px) saturate(1.4);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.35);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* =============================================
   Components
   =========================================== */
/* Glass-style navigation bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  backdrop-filter: blur(18px) saturate(1.3);
  background: linear-gradient(135deg, rgba(248, 250, 252, 0.96), rgba(239, 246, 255, 0.9));
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.navbar__inner {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-4);
  padding-block: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.navbar__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--font-size-lg);
  color: var(--color-gray-900);
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.navbar__link {
  position: relative;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  transition: background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.navbar__link:hover,
.navbar__link:focus-visible {
  background: linear-gradient(135deg, rgba(219, 234, 254, 0.9), rgba(191, 219, 254, 0.9));
  color: var(--color-gray-900);
  box-shadow: 0 10px 25px rgba(148, 163, 184, 0.3);
  transform: translateY(-1px);
}

.navbar__link--active {
  background: var(--gradient-primary);
  color: var(--color-text-on-dark);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

.navbar__cta {
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--color-text-on-dark);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.4);
  transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
}

.navbar__cta:hover,
.navbar__cta:focus-visible {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 20px 55px rgba(30, 64, 175, 0.6);
}

/* Mobile nav toggle - required direction rule */
.nav-toggle {
  display: none;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  flex-direction: column; /* required technical note */
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(255, 255, 255, 0.9);
}

.nav-toggle span {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-gray-800);
}

@media (max-width: 900px) {
  .navbar__menu {
    display: none;
  }

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast), border-color var(--transition-base), opacity var(--transition-base);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-on-dark);
  box-shadow: 0 18px 45px rgba(37, 99, 235, 0.5);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-gray-900) !important;
  border-color: rgba(148, 163, 184, 0.7);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: rgba(219, 234, 254, 0.9);
  border-color: rgba(37, 99, 235, 0.7);
  color: #1a1a2e !important;
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-on-dark);
  border-color: transparent;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(15, 23, 42, 0.7);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

/* Inputs & form controls */
.input,
textarea,
select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(255, 255, 255, 0.98);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), transform var(--transition-fast);
}

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

.input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: rgba(37, 99, 235, 0.9);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.55), 0 18px 40px rgba(37, 99, 235, 0.25);
  background: #ffffff;
}

.input--error {
  border-color: rgba(239, 68, 68, 0.85);
}

.input--error:focus-visible {
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.6), 0 18px 40px rgba(239, 68, 68, 0.25);
}

.label {
  display: inline-block;
  margin-bottom: 0.3rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-800);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Cards - rounded, soft shadows, glassmorphism */
.card {
  position: relative;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, rgba(219, 234, 254, 0.7), transparent 60%), var(--color-bg-soft);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-xs);
  padding: var(--space-5);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base), opacity var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(59, 130, 246, 0.4);
}

.card--glass {
  background: radial-gradient(circle at top left, rgba(191, 219, 254, 0.3), transparent 65%), var(--color-bg-glass-strong);
  backdrop-filter: blur(18px) saturate(1.25);
}

.card__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary-dark);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card__title {
  font-size: var(--font-size-xl);
  margin-top: var(--space-3);
  margin-bottom: var(--space-2);
}

.card__meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-gray-500);
}

/* Atmosphere / feature list style for event benefits */
.list-check {
  display: grid;
  gap: 0.5rem;
  padding-left: 0;
}

.list-check__item {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

.list-check__icon {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--color-success);
}

/* =============================================
   Accessibility & Screen Reader Helpers
   =========================================== */
.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;
}

:focus-visible {
  outline: 2px solid transparent;
  box-shadow: 0 0 0 2px rgba(191, 219, 254, 0.9), 0 0 0 5px rgba(37, 99, 235, 0.9);
  border-radius: 6px;
}

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

/* =============================================
   Animation & Scroll Effects (subtle)
   =========================================== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 480ms ease-out, transform 480ms ease-out;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

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

.card-animated:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-sm);
}

/* =============================================
   Event-specific helpers (offline, recreational)
   =========================================== */
.badge-offline {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(22, 163, 74, 0.12);
  color: #15803d;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.badge-rekreacyjny {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.12);
  color: #0284c7;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.pill-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(248, 250, 252, 0.85);
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
}

/* =============================================
   Tables / Info blocks (FAQ / Process)
   =========================================== */
.info-block {
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, rgba(219, 234, 254, 0.6), transparent 60%), var(--color-bg-ivory);
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
}

.info-block__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}

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

@media (max-width: 960px) {
  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .info-grid {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   Footer
   =========================================== */
.footer {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  background: linear-gradient(to top, #020617, #0b1120);
  color: var(--color-text-on-dark);
  padding-block: var(--space-10);
}

.footer__meta {
  font-size: var(--font-size-xs);
  color: rgba(226, 232, 240, 0.8);
}

.footer a {
  color: rgba(191, 219, 254, 0.95);
}

.footer a:hover,
.footer a:focus-visible {
  color: #ffffff !important;
}