.pt-color-scheme-switcher {
  box-sizing: border-box;
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 2147483000;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px;
  width: min(360px, calc(100vw - 24px));
  padding: 5px;
  border: 1px solid rgba(121, 150, 185, .34);
  border-radius: 16px;
  background: rgba(10, 22, 42, .9);
  box-shadow: 0 14px 42px rgba(0, 0, 0, .28);
  color: #eaf4ff;
  font: 700 13px/1.2 system-ui, "Segoe UI", Arial, sans-serif;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transform: scale(.5);
  transform-origin: right bottom;
}

.pt-color-scheme-switcher button {
  box-sizing: border-box;
  min-width: 0;
  min-height: 38px;
  margin: 0;
  padding: 8px 7px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
}

.pt-color-scheme-switcher button:hover {
  background: rgba(255, 255, 255, .09);
}

.pt-color-scheme-switcher button:focus-visible {
  outline: 2px solid #38d8ff;
  outline-offset: 1px;
}

.pt-color-scheme-switcher button[aria-pressed="true"] {
  background: linear-gradient(135deg, #35d7ff, #79ffd2);
  color: #071625;
  box-shadow: 0 5px 18px rgba(53, 215, 255, .24);
}

html.day-theme .pt-color-scheme-switcher,
html[data-theme="day"] .pt-color-scheme-switcher {
  border-color: rgba(35, 70, 105, .2);
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 14px 42px rgba(25, 60, 95, .18);
  color: #10233d;
}

html.day-theme .pt-color-scheme-switcher button:hover,
html[data-theme="day"] .pt-color-scheme-switcher button:hover {
  background: rgba(15, 118, 110, .08);
}

/* The legacy two-button control on ProgramCatalog is replaced by this four-mode control. */
.themeSwitch:not(.pt-color-scheme-switcher) {
  display: none !important;
}

/* ПОЯС originally had only its current dark palette. */
html.pt-theme-pojas.day-theme,
html.pt-theme-pojas[data-theme="day"] {
  color-scheme: light;
  --ink: #10213d;
  --muted: #53657d;
  --dark: #f5f9ff;
  --deep: #eaf3ff;
  --blue: #0b78d7;
  --cyan: #087fa4;
  --line: rgba(16, 86, 145, .2);
  --panel: rgba(255, 255, 255, .9);
  --panel2: rgba(239, 247, 255, .94);
  --shadow: 0 24px 70px rgba(24, 64, 110, .14);
}

html.pt-theme-pojas.day-theme body,
html.pt-theme-pojas[data-theme="day"] body {
  background:
    radial-gradient(circle at 12% 0%, rgba(34, 215, 255, .14), transparent 28rem),
    radial-gradient(circle at 86% 10%, rgba(255, 200, 87, .13), transparent 30rem),
    linear-gradient(180deg, #f8fbff 0%, #edf5ff 48%, #e4effc 100%);
}

html.pt-theme-pojas.day-theme header,
html.pt-theme-pojas[data-theme="day"] header {
  background: rgba(248, 252, 255, .9);
}

@media (max-width: 560px) {
  .pt-color-scheme-switcher {
    left: 8px;
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    width: auto;
    font-size: 12px;
  }

  .pt-color-scheme-switcher button {
    min-height: 36px;
    padding-inline: 4px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .pt-color-scheme-switcher,
  .pt-color-scheme-switcher button {
    transition: background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
  }
}