/*
 * Adaptive layout — margin-first fit + mobile breakpoint.
 * Desktop: scale 1 пока поля до контента ≥20px; иначе / при росте — пропорциональный scale, cap 4K.
 * Mobile: scale 100vw/440; порог w<1200 || h<600.
 */
html {
  overflow-x: clip;
  /* fallback до design-viewport.js */
  font-size: calc(100vw / 1920);
}

html,
body {
  margin: 0;
  background: var(--color-bg, #ffffff);
}

.page {
  position: relative;
  width: calc(var(--design-w, 1920) * 1rem);
  margin: 0 auto;
  min-height: 100%;
}

/* Desktop: fit-scale из JS (--fit-fs); центрирование в viewport */
html[data-layout="desktop"] {
  height: 100%;
  overflow: hidden;
  font-size: var(--fit-fs, calc(100vw / var(--design-w, 1920)));
}

html[data-layout="desktop"] body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  overflow: hidden;
}

html[data-layout="desktop"] .page {
  flex-shrink: 0;
  width: calc(var(--design-w, 1920) * 1rem);
  height: calc(var(--page-height-main-desktop, 1080) * 1rem);
  margin: 0;
  overflow: hidden;
}

/* Mobile: scale по ширине; page scroll разрешён */
html[data-layout="mobile"][data-viewport="ok"] {
  font-size: calc(100vw / var(--design-w, 440));
}

html[data-layout="mobile"][data-viewport="ok"] body {
  display: block;
  overflow-y: auto;
}

html[data-layout="mobile"][data-viewport="ok"] .page {
  height: auto;
  min-height: 100%;
  overflow: visible;
}

/* Заглушка: обычный px, без rem-scale */
html[data-layout="mobile"][data-viewport="unsupported"] {
  font-size: 16px;
}

.viewport-unsupported {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
  background: var(--color-bg, #ffffff);
  color: var(--color-text, #2c2c2c);
  font-family: var(--font-family-base, system-ui, sans-serif);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  text-align: center;
  max-width: 100%;
  z-index: 1000;
}

.viewport-unsupported[hidden] {
  display: none !important;
}

html[data-viewport="unsupported"] .page {
  display: none !important;
}

html[data-viewport="unsupported"] .viewport-unsupported {
  display: flex !important;
}

html[data-viewport="unsupported"] .viewport-unsupported[hidden] {
  display: flex !important;
}