/* ToolsOS — base / reset */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: dark;
}
:root[data-theme="light"] html { color-scheme: light; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--text);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  min-height: 100dvh;
}

/* Subtle ambient glow, kept very low-key and non-distracting */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1200px 500px at 18% -10%, rgba(124, 92, 255, 0.08), transparent 60%),
    radial-gradient(1000px 460px at 100% 0%, rgba(34, 211, 238, 0.05), transparent 55%);
}

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: var(--lh-tight); font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }

p { line-height: var(--lh-normal); }
small { font-size: var(--fs-sm); }

code, kbd, samp { font-family: var(--font-mono); font-size: 0.85em; }

::selection { background: var(--accent-ghost); color: var(--text); }

/* Icons */
.icon {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon--sm { width: 16px; height: 16px; }
.icon--lg { width: 26px; height: 26px; }

/* Focus visibility — always visible, accent ring */
:focus-visible {
  outline: 2px solid transparent;
  box-shadow: var(--shadow-focus);
  border-radius: var(--r-xs);
}

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 999px; border: 2px solid transparent; background-clip: content-box; }
*::-webkit-scrollbar-thumb:hover { background: var(--text-dim); background-clip: content-box; }

/* Accessibility helpers */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed;
  top: -60px;
  left: 12px;
  z-index: 200;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 10px 16px;
  border-radius: var(--r-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; text-decoration: none; }

/* Respect reduced-motion preference (system or in-app toggle) */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}
:root[data-reduce-motion="1"] *,
:root[data-reduce-motion="1"] *::before,
:root[data-reduce-motion="1"] *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
  scroll-behavior: auto !important;
}