/* ==========================================================================
   Base — reset, типография, достъпност
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 600;
  letter-spacing: var(--track-tight);
  line-height: var(--lh-snug);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease-out);
}

img, svg, video { display: block; max-width: 100%; height: auto; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}
button { background: none; border: 0; cursor: pointer; }
:disabled { cursor: not-allowed; }

hr { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ---- Фокус: видим, но не грозен ----------------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

::selection { background: var(--brand-500); color: var(--text-on-brand); }

/* ---- Скролбар ------------------------------------------------------------ */
* { scrollbar-width: thin; scrollbar-color: var(--ink-300) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--ink-300);
  border: 3px solid transparent;
  background-clip: content-box;
  border-radius: var(--r-pill);
}
*::-webkit-scrollbar-thumb:hover { background: var(--ink-400); background-clip: content-box; }

/* ---- Помощни ------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: var(--z-base);
}
.wrap--narrow { max-width: 880px; }
.wrap--wide { max-width: 1360px; }

.prose { max-width: var(--maxw-prose); }
.stack > * + * { margin-top: var(--sp-4); }
.center { text-align: center; margin-inline: auto; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -100px; left: var(--sp-4);
  z-index: 999;
  padding: var(--sp-3) var(--sp-5);
  background: var(--brand-500);
  color: var(--text-on-brand);
  border-radius: var(--r-sm);
  font-weight: 600;
  transition: top var(--t-base) var(--ease-out);
}
.skip-link:focus { top: var(--sp-4); }

.text-muted { color: var(--text-muted); }
.text-faint  { color: var(--text-faint); }
.text-brand  { color: var(--brand-600); }
.editorial   { font-family: var(--font-editorial); }
.mono        { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.nowrap      { white-space: nowrap; }

.hide-sm { }
@media (max-width: 720px) { .hide-sm { display: none !important; } }
@media (min-width: 721px) { .only-sm { display: none !important; } }

/* ---- Reveal при скрол (progressive enhancement) --------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms var(--ease-out), transform 620ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ---- Уважение към предпочитанията на потребителя -------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

@media (prefers-contrast: more) {
  :root { --line: rgb(var(--ink-rgb) / 0.22); --text-muted: #c9c9d2; }
}

/* ---- Печат: изхвърляме UI, оставяме документа ----------------------------- */
@media print {
  .no-print, .app-nav, .app-sidebar, .app-topbar, .app-tabbar,
  .site-header, .site-footer, .toast-host, .result-bar, .meta-strip,
  .doc-edit-btn, .locked-note, .mobile-menu, .cookie-bar { display: none !important; }
  body { background: #fff; color: #000; }
  .paper-scope { --bg: #fff; }
  a[href]::after { content: ""; }
  .doc-page { box-shadow: none !important; border: 0 !important; margin: 0 !important; }
}