/* ========================================================================== 
   Variables
   ========================================================================== */
:root {
  /* Color Palette - Light Loft / Industrial */
  --color-bg: #ffffff;
  --color-bg-muted: #f5f5f6; /* light gray sections */
  --color-bg-elevated: #fcfcfd;
  --color-bg-contrast: #111111;

  --color-text: #161616;
  --color-text-soft: #4b4b4f;
  --color-text-muted: #7a7a80;

  --color-primary: #141414; /* near-black for minimalist accents */
  --color-primary-soft: #27272b;
  --color-primary-contrast: #ffffff;

  --color-success: #1b7f5f;
  --color-warning: #c98a1a;
  --color-danger: #b3383a;

  /* Neutral Grays inspired by concrete / loft */
  --gray-50: #fafafa;
  --gray-100: #f3f3f4;
  --gray-200: #e4e4e7;
  --gray-300: #d4d4d8;
  --gray-400: #a1a1aa;
  --gray-500: #71717a;
  --gray-600: #52525b;
  --gray-700: #3f3f46;
  --gray-800: #27272f;
  --gray-900: #18181b;

  /* Accent hints (wood / warm light) */
  --color-accent-warm: #c89b6f; /* natural oak accent */
  --color-accent-light: #f6e7d0; /* warm lighting glow */

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --font-display: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Font Sizes (rem, mobile-first) */
  --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 Heights */
  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Spacing Scale (px converted to rem, base 16px) */
  --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 - sharp industrial with subtle softening */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 16px;
  --radius-pill: 999px;

  /* Shadows - soft, diffused for loft ambience */
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 30px rgba(15, 15, 20, 0.08);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.12);

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

  /* Layout */
  --container-width: 1120px;
  --container-padding-x: 1.25rem;
  --header-height: 64px;
}

@media (min-width: 768px) {
  :root {
    --font-size-3xl: 2.25rem; /* 36px */
    --font-size-4xl: 3rem;    /* 48px */
    --font-size-5xl: 3.75rem; /* 60px */
    --header-height: 76px;
  }
}


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

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
}

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

ul, ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

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

img {
  height: auto;
}

button, input, textarea, select {
  margin: 0;
  font: inherit;
  color: inherit;
}

textarea {
  resize: vertical;
}

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

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
}

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

:focus {
  outline: none;
}

[hidden] {
  display: none !important;
}


/* ========================================================================== 
   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-bg);
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 100vh;
}

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;
}

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

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

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

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

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

strong {
  font-weight: 600;
  color: var(--color-text);
}

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

a {
  position: relative;
  cursor: pointer;
  transition: color var(--transition-base), opacity var(--transition-base);
}

a:hover {
  opacity: 0.8;
}

/* Minimalist underline utility for nav/links when needed */
.link-underline {
  text-decoration: none;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1em;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.link-underline:hover::after,
.link-underline:focus-visible::after {
  transform: scaleX(1);
}

hr {
  margin: var(--space-8) 0;
  border: 0;
  border-top: 1px solid var(--gray-200);
}

code, pre {
  font-family: var(--font-mono);
}


/* ========================================================================== 
   Accessibility & Reduced Motion
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--color-accent-warm);
  outline-offset: 3px;
}

@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;
  }
}


/* ========================================================================== 
   Layout Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: calc(var(--container-width) + var(--container-padding-x) * 2);
  margin-inline: auto;
  padding-inline: var(--container-padding-x);
}

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

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

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

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

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

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

.flex-row {
  flex-direction: row;
}

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

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

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

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

.gap-8 {
  gap: var(--space-8);
}

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

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

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

@media (max-width: 767.98px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Alignment / Text */
.text-center {
  text-align: center;
}

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

.text-muted {
  color: var(--color-text-muted);
}

/* Spacing Utilities (Y-axis margins/padding) */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.py-4 { padding-block: var(--space-4); }
.py-6 { padding-block: var(--space-6); }
.py-8 { padding-block: var(--space-8); }
.py-12 { padding-block: var(--space-12); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

/* Width / Layout Helpers */
.full-bleed {
  width: 100vw;
  margin-left: 50%;
  transform: translateX(-50%);
}

.sticky {
  position: sticky;
}

.top-header {
  top: var(--header-height);
}


/* ========================================================================== 
   Screen Reader Utility
   ========================================================================== */
.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
   ========================================================================== */

/* Header / Navigation base styles (minimal, structure only) */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(17, 17, 17, 0.04);
}

.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.nav__link {
  font-size: var(--font-size-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-soft);
  padding-block: 0.25rem;
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -0.25rem;
  height: 1px;
  background: var(--color-text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav__link--active,
.nav__link:hover {
  color: var(--color-text);
}

.nav__link--active::after,
.nav__link:hover::after {
  transform: scaleX(1);
}


/* Hero / Fullscreen slider shell (no JS) */
.hero {
  position: relative;
  min-height: 100vh;
  color: var(--color-bg);
  background-color: var(--color-bg-contrast);
}

.hero__media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(200, 155, 111, 0.24), transparent 60%),
              linear-gradient(to bottom, rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0.9));
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: calc(var(--space-16) + var(--header-height));
}

.hero__eyebrow {
  font-size: var(--font-size-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--space-2);
}

.hero__title {
  max-width: 18ch;
  color: var(--color-primary-contrast);
}

.hero__subtitle {
  margin-top: var(--space-4);
  max-width: 40ch;
  color: rgba(255, 255, 255, 0.8);
}


/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding-inline: 1.4rem;
  padding-block: 0.7rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-fast);
}

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

.btn--primary:hover {
  background-color: var(--color-primary-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--gray-300);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  background-color: var(--gray-50);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-primary-contrast);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn--ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

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

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

/* Sticky CTA specific helper */
.sticky-cta {
  position: fixed;
  inset-inline-end: var(--space-4);
  inset-block-end: var(--space-4);
  z-index: 50;
}

@media (min-width: 768px) {
  .sticky-cta {
    inset-inline-end: var(--space-6);
    inset-block-end: var(--space-6);
  }
}


/* Form Controls */
.input,
.textarea,
.select {
  width: 100%;
  padding-inline: 0.9rem;
  padding-block: 0.65rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-muted);
}

.input:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  border-color: var(--color-accent-warm);
  box-shadow: 0 0 0 1px rgba(200, 155, 111, 0.35);
}

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

.label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}


/* Card - Loft-style content blocks */
.card {
  position: relative;
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

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

.card--loft {
  background-image:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(245, 245, 246, 0.96)),
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.03), transparent 60%);
  background-blend-mode: normal;
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
}

.card__eyebrow {
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.card__title {
  margin-bottom: var(--space-2);
}

.card__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}


/* Concrete / texture utility to hint at industrial loft walls */
.surface-concrete {
  background-color: #f3f3f4;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.05) 1px, transparent 0),
    radial-gradient(circle at 3px 2px, rgba(0, 0, 0, 0.06) 1px, transparent 0);
  background-size: 6px 6px;
}

.surface-wood-strip {
  background: linear-gradient(90deg, #d4af7a 0, #c89b6f 28%, #b48654 60%, #d7b78a 100%);
}


/* Timeline / Steps (for "Průběh Organizace") */
.timeline {
  position: relative;
  padding-left: 1.6rem;
  border-left: 1px solid var(--gray-200);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-6);
}

.timeline__bullet {
  position: absolute;
  left: -0.55rem;
  top: 0.15rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 999px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-accent-warm);
}


/* Stats (for realizované eventy) */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: var(--space-6);
}

.stats__item {
  padding-block: var(--space-4);
  border-top: 1px solid var(--gray-200);
}

.stats__value {
  font-family: var(--font-display);
  font-size: var(--font-size-3xl);
  letter-spacing: -0.04em;
}

.stats__label {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}


/* Masonry gallery shell */
.gallery-masonry {
  column-count: 1;
  column-gap: var(--space-4);
}

.gallery-masonry__item {
  break-inside: avoid;
  margin-bottom: var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.gallery-masonry__img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow), filter var(--transition-slow);
}

.gallery-masonry__img:hover {
  transform: scale(1.03);
  filter: saturate(1.05);
}

@media (min-width: 640px) {
  .gallery-masonry {
    column-count: 2;
  }
}

@media (min-width: 1024px) {
  .gallery-masonry {
    column-count: 3;
  }
}


/* Carousel shell (for reference slider) */
.carousel {
  position: relative;
  overflow: hidden;
}

.carousel__track {
  display: flex;
  gap: var(--space-4);
  scroll-snap-type: x mandatory;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.carousel__slide {
  flex: 0 0 80%;
  scroll-snap-align: start;
}

@media (min-width: 768px) {
  .carousel__slide {
    flex-basis: 40%;
  }
}

.carousel__controls {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-4);
}


/* Footer */
.site-footer {
  border-top: 1px solid var(--gray-200);
  background-color: var(--gray-50);
  padding-block: var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

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

.site-footer__bottom {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__disclaimer {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  max-width: 70ch;
}

@media (min-width: 768px) {
  .site-footer__top {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}


/* Legal text blocks */
.legal-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  line-height: var(--line-height-relaxed);
}


/* Utility: subtle divider for sections */
.divider {
  width: 48px;
  height: 1px;
  background-color: var(--gray-300);
}


/* Utility: chip / tag */
.chip {
  display: inline-flex;
  align-items: center;
  padding-inline: 0.75rem;
  padding-block: 0.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--gray-200);
  font-size: var(--font-size-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}