/* Cupertino.css - Apple-inspired Classless Framework */

:root {
  /* Native controls (scrollbars, slider, pickers) sledujú light/dark */
  color-scheme: light dark;

  /* Apple Color Palette */
  --primary-blue: #007aff;
  --primary-blue-hover: #0056cc;
  --secondary-gray: #8e8e93;
  --tertiary-gray: #c7c7cc;
  --quaternary-gray: #e5e5ea;
  --label-primary: #000000;
  --label-secondary: #3c3c43;
  --label-tertiary: #3c3c4399;
  --separator: #3c3c434a;
  --background-primary: #ffffff;
  --background-secondary: #f2f2f7;
  --background-tertiary: #ffffff;
  --red: #ff3b30;
  --green: #34c759;

  /* Typography */
  --font-family-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* Materials */
  --material-regular: rgba(255, 255, 255, 0.7);
  --material-thick: rgba(255, 255, 255, 0.9);
  
  /* Standard Transition */
  --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --label-primary: #ffffff;
    --label-secondary: #ebebf5;
    --label-tertiary: #ebebf599;
    --separator: #38383a;
    --background-primary: #000000;
    --background-secondary: #1c1c1e;
    --background-tertiary: #2c2c2e;
    --quaternary-gray: #3a3a3c;
    --tertiary-gray: #48484a;
    --secondary-gray: #636366;
    --material-regular: rgba(30, 30, 30, 0.7);
    --material-thick: rgba(44, 44, 46, 0.8);
  }
}

/* Base & Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-system);
  font-weight: var(--font-weight-regular);
  color: var(--label-primary);
  background-color: var(--background-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Layout - Pragmatic Grid */
main {
  max-width: 800px;
  width: 100%; /* Poistka pre malé obrazovky */
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

section {
  margin-bottom: var(--spacing-3xl);
  
  /* Robustný grid pre karty */
  &:has(article + article) {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: start;

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

    /* Nadpisy v rámci gridu musia zabrať celý riadok */
    > h1, > h2, > h3, > h4, > h5, > h6 {
      grid-column: 1 / -1;
    }
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--label-primary);
  text-wrap: balance;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; font-weight: var(--font-weight-semibold); }
h4 { font-size: 1.25rem; font-weight: var(--font-weight-semibold); }
h5 { font-size: 1.1rem; font-weight: var(--font-weight-semibold); }
h6 { font-size: 1rem; font-weight: var(--font-weight-semibold); color: var(--label-secondary); }

blockquote {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-left: 3px solid var(--primary-blue);
  color: var(--label-secondary);
  font-size: 1.05rem;

  footer {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--label-tertiary);
  }
}

hr {
  border: none;
  border-top: 1px solid var(--separator);
  margin: var(--spacing-xl) 0;
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);

  &:hover { color: var(--primary-blue-hover); }
  &:active { opacity: 0.7; }
  &:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }
}

/* Buttons */
button, 
input[type="submit"], 
input[type="button"] {
  font-family: inherit;
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  background: var(--primary-blue);
  color: white;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  user-select: none;

  &:hover { background: var(--primary-blue-hover); }
  &:active { opacity: 0.6; }
  &:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.4);
  }
  &:disabled {
    background: var(--quaternary-gray);
    color: var(--label-tertiary);
    cursor: not-allowed;
    opacity: 0.9;
  }

  &.secondary {
    background: var(--secondary-gray);
    &:hover { background: var(--label-secondary); }
  }

  &.destructive {
    background: var(--red);
    &:hover { background: color-mix(in srgb, var(--red) 80%, black); }
  }

  &.outline {
    background: transparent;
    border: 1px solid var(--primary-blue);
    color: var(--primary-blue);
    &:hover { background: rgba(0, 122, 255, 0.1); }
  }

  &.loading {
    color: transparent;
    pointer-events: none;
    position: relative;

    &::after {
      content: "";
      position: absolute;
      top: 50%;
      left: 50%;
      width: 18px;
      height: 18px;
      margin: -9px 0 0 -9px;
      border: 2px solid rgba(255, 255, 255, 0.4);
      border-top-color: white;
      border-radius: 50%;
      animation: cupertino-spin 0.7s linear infinite;
    }
  }
}

@keyframes cupertino-spin {
  to { transform: rotate(360deg); }
}

/* Form Elements */
label {
  display: block;
  font-weight: var(--font-weight-medium);
  font-size: 0.9rem;
  color: var(--label-secondary);
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-md);
  cursor: pointer;

  /* Ak je vnútri checkbox, chceme aby to bolo v jednom riadku */
  &:has(input[type="checkbox"]),
  &:has(input[type="radio"]) {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
  }
}

input:not([type="checkbox"]):not([type="radio"]),
textarea,
select {
  font-family: inherit;
  font-size: 1rem;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--separator);
  border-radius: var(--radius-md);
  background: var(--background-tertiary);
  color: var(--label-primary);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  width: 100%;
  min-height: 44px;
  appearance: none;

  &:focus-visible {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
  }
}

select {
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007AFF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) top 50%;
  background-size: 10px auto;
  padding-right: var(--spacing-xl);
}

/* Checkboxes & Radios - Poriadny Reset */
input[type="checkbox"]:not([role="switch"]),
input[type="radio"] {
  appearance: none;
  width: 20px;
  height: 20px;
  margin: 0;
  border: 1px solid var(--tertiary-gray);
  background: var(--background-tertiary);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  flex-shrink: 0; /* Nesmie sa scvrknúť v flexboxe */

  &:checked {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
  }

  &:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.3);
  }
}

input[type="checkbox"]:not([role="switch"]) {
  border-radius: 4px;
  &:checked::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
  }
}

input[type="radio"] {
  border-radius: 50%;
  &:checked::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
  }
}

/* Toggle Switch (Apple Style) */
input[type="checkbox"][role="switch"] {
  appearance: none;
  width: 51px;
  height: 31px;
  background: var(--quaternary-gray);
  border-radius: 31px;
  position: relative;
  cursor: pointer;
  transition: background 0.3s ease;
  flex-shrink: 0;
  border: 1px solid transparent; /* Fallback */

  &::after {
    content: "";
    position: absolute;
    top: 1px;
    left: 1px;
    width: 27px;
    height: 27px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 3px 8px rgba(0,0,0,0.15), 0 3px 1px rgba(0,0,0,0.06);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  &:checked {
    background: var(--green);
    &::after { transform: translateX(20px); }
  }

  &:active::after {
    width: 32px; /* Jemné natiahnutie pri kliknutí - iOS detail */
  }

  &:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.3);
  }
}

/* Range Slider (iOS Style) */
input[type="range"] {
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--quaternary-gray);
  cursor: pointer;
  margin: var(--spacing-md) 0;

  &::-webkit-slider-thumb {
    appearance: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25), 0 0 1px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-base);
  }

  &::-moz-range-thumb {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: white;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25), 0 0 1px rgba(0, 0, 0, 0.2);
  }

  &:active::-webkit-slider-thumb { transform: scale(1.1); }

  &:focus-visible {
    outline: none;
    &::-webkit-slider-thumb { box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.3); }
    &::-moz-range-thumb { box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.3); }
  }
}

/* Fieldset & Legend */
fieldset {
  border: 1px solid var(--separator);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);

  legend {
    font-weight: var(--font-weight-bold);
    color: var(--label-primary);
    padding: 0 var(--spacing-sm);
  }
}

/* Native Dialog (Modal) */
dialog {
  padding: var(--spacing-xl);
  border: 1px solid var(--separator);
  border-radius: var(--radius-lg);
  background: var(--material-thick);
  box-shadow: var(--shadow-lg);
  color: var(--label-primary);
  max-width: 450px;
  width: 90%;
  margin: auto;
  
  /* Glassmorphism with fallback */
  @supports (backdrop-filter: blur(1px)) {
    backdrop-filter: blur(20px) saturate(180%);
    background: var(--material-regular);
  }

  &::backdrop {
    background: rgba(0, 0, 0, 0.3);
    @supports (backdrop-filter: blur(1px)) {
      backdrop-filter: blur(5px);
    }
  }
}

/* Accordion */
details {
  background-color: var(--background-tertiary);
  border: 1px solid var(--separator);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  transition: background-color var(--transition-base);

  &[open] {
    background-color: var(--background-secondary);
    summary::after { transform: translateY(-50%) rotate(-90deg); }
  }

  summary {
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    position: relative;
    list-style: none;
    
    &::-webkit-details-marker { display: none; }

    &::after {
      content: "›";
      position: absolute;
      right: var(--spacing-lg);
      top: 50%;
      transform: translateY(-50%) rotate(90deg);
      transition: transform var(--transition-base);
      font-size: 1.5rem;
      color: var(--secondary-gray);
    }
  }

  p { padding: 0 var(--spacing-lg) var(--spacing-md); }
}

/* Navigation */
nav {
  background: var(--material-thick);
  border-bottom: 1px solid var(--separator);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;

  @supports (backdrop-filter: blur(1px)) {
    backdrop-filter: blur(20px) saturate(180%);
    background: var(--material-regular);
  }

  ul {
    display: flex;
    list-style: none;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0;
    padding: 0;
  }

  li {
    padding: 0;
    margin: 0;
  }

  a {
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
    color: var(--label-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base), color var(--transition-base);

    &:hover { 
      background: var(--background-secondary); 
      color: var(--primary-blue); 
    }
  }
}

/* Articles (Cards) */
article {
  background: var(--background-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  min-width: 0;
  overflow: hidden;

  &:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  > *:last-child {
    margin-bottom: 0;
  }
}

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);

  li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-xs);
    line-height: 1.6;

    &::marker { color: var(--secondary-gray); }
  }
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
  background: var(--background-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--separator);

  th, td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--separator);
  }

  th {
    font-weight: var(--font-weight-semibold);
    color: var(--label-secondary);
    background: var(--background-secondary);
  }

  tbody tr:last-child td { border-bottom: none; }
  tbody tr {
    transition: background-color var(--transition-base);
    &:hover { background: var(--background-secondary); }
  }
}

/* Messages & Alerts (aside) */
aside {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  background: var(--background-secondary);
  border-left: 4px solid var(--secondary-gray);
  color: var(--label-primary);

  &[role="status"] {
    border-left-color: var(--green);
    background: color-mix(in srgb, var(--green) 12%, var(--background-secondary));
  }

  &[role="alert"] {
    border-left-color: var(--red);
    background: color-mix(in srgb, var(--red) 12%, var(--background-secondary));
  }
}

/* Code */
code {
  font-family: SF Mono, Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
  font-size: 0.875rem;
  background: var(--background-secondary);
  color: var(--label-primary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--background-secondary);
  color: var(--label-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  overflow-x: auto;
  max-width: 100%; /* POISTKA: Nesmie nikdy prekročiť šírku rodiča */
  border: 1px solid var(--separator);
  line-height: 1.4;

  code {
    background: none;
    padding: 0;
    font-size: 0.85rem;
    white-space: pre; /* Zachová formátovanie kódu */
    word-spacing: normal;
    word-break: normal;
  }
}

/* Keyboard Shortcuts */
kbd {
  display: inline-block;
  padding: 3px 6px;
  font-family: inherit;
  font-size: 0.85em;
  line-height: 1;
  color: var(--label-primary);
  background-color: var(--background-secondary);
  border: 1px solid var(--separator);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
  vertical-align: middle;
}

/* Badges and Tags */
mark {
  background-color: var(--primary-blue);
  color: white;
  padding: 0.2em 0.6em;
  border-radius: var(--radius-sm);
  font-size: 0.85em;
  font-weight: var(--font-weight-semibold);
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--label-secondary); }
.text-danger { color: var(--red); }
.text-success { color: var(--green); }

/* Progress */
progress {
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  background-color: var(--quaternary-gray);

  &::-webkit-progress-bar { background-color: var(--quaternary-gray); }
  &::-webkit-progress-value { background-color: var(--primary-blue); transition: width 0.3s ease; }
  &::-moz-progress-bar { background-color: var(--primary-blue); }
}

/* Animations */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--label-primary);
    background: var(--background-tertiary);
    transition: all 0.2s ease;
}

.pagination a:hover {
    background: var(--background-secondary);
    color: var(--primary-blue);
}

.pagination .current {
    background: var(--primary-blue);
    color: white;
    font-weight: var(--font-weight-semibold);
}

.pagination .disabled {
    opacity: 0.4;
    pointer-events: none;
}

.pagination .dots {
    background: transparent;
    pointer-events: none;
}