/* Experioo – Base Styles (accessible, responsive) */
:root {
  --bg: #ffffff;
  --fg: #0f172a; /* slate-900 */
  --muted: #475569; /* slate-600 */
  --border: #e2e8f0; /* slate-200 */
  --primary: #2563eb; /* blue-600 */
  --primary-contrast: #ffffff;
  --alt: #f8fafc; /* slate-50 */
  --focus: #f59e0b; /* amber-500 */
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
}

.container { width: min(1100px, 92%); margin-inline: auto; }
.grid { display: grid; gap: 2rem; }
.grid.two { grid-template-columns: 1.2fr 1fr; }
.grid.three { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 900px) {
  .grid.two, .grid.three { grid-template-columns: 1fr; }
}

h1, h2, h3 { line-height: 1.2; }
h1 { font-size: clamp(2rem, 3vw + 1rem, 3rem); margin: 0.25em 0 0.5em; }
h2 { font-size: clamp(1.4rem, 1.6vw + 1rem, 2rem); margin-top: 0; }

.lead { font-size: 1.125rem; color: var(--muted); }
.bullets { padding-left: 1.2rem; color: var(--muted); }
.bullets li { margin: 0.25rem 0; }

/* Header */
.site-header { position: sticky; top: 0; background: rgba(255,255,255,0.92); backdrop-filter: saturate(160%) blur(6px); border-bottom: 1px solid var(--border); z-index: 20; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 0; }
.brand { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; color: inherit; font-weight: 700; }
.brand img { display: block; }
.brand-name { letter-spacing: .2px; }

/* Language selector in header */
.lang-select { display: inline-flex; align-items: center; gap: .5rem; margin-left: auto; }
.lang-select label { color: var(--muted); font-size: .85rem; }
.lang-select select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding: .4rem .8rem;
  border-radius: .5rem;
  border: 1px solid var(--border);
  background: var(--alt);
  color: var(--fg);
  font-weight: 600;
}
.lang-select select:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.site-nav ul { display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.site-nav a { text-decoration: none; color: var(--muted); padding: .5rem .75rem; border-radius: .5rem; }
.site-nav a:hover, .site-nav a:focus { color: var(--fg); background: var(--alt); outline: none; }
.site-nav a.is-current { color: var(--fg); font-weight: 600; }

.nav-toggle { display: none; background: transparent; border: 0; padding: .5rem; border-radius: .5rem; }
.nav-toggle:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.nav-toggle-bar { display: block; width: 24px; height: 2px; background: var(--fg); margin: 5px 0; }

@media (max-width: 780px) {
  .nav-toggle { display: inline-block; }
  .site-nav { position: absolute; inset: 56px 0 auto 0; background: var(--bg); border-bottom: 1px solid var(--border); transform-origin: top; transform: scaleY(0); transition: .15s ease; }
  .site-nav.open { transform: scaleY(1); }
  .site-nav ul { flex-direction: column; padding: .5rem; }
  .lang-select { margin-left: 0; }
}

/* Buttons */
.btn { display: inline-block; padding: .75rem 1rem; border-radius: .75rem; text-decoration: none; font-weight: 600; border: 1px solid var(--border); color: var(--fg); background: var(--bg); }
.btn:hover, .btn:focus { background: var(--alt); outline: none; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-contrast); }
.btn.primary:hover, .btn.primary:focus { filter: brightness(0.95); }
.btn.ghost { background: transparent; }

/* Hero */
.hero { padding: 3rem 0 2rem; }
.hero-preview { display: block; width: 50%; max-width: 480px; height: auto; border: 1px solid var(--border); border-radius: 1rem; background: #fff; margin: 0 auto; }
@media (max-width: 900px) {
  .hero-preview { width: 100%; max-width: none; }
}

.section { padding: 3rem 0; }
.section.alt { background: var(--alt); }

.features .card { border: 1px solid var(--border); border-radius: .75rem; padding: 1rem; background: #fff; }

.privacy-card { border: 1px dashed var(--border); border-radius: .75rem; padding: 1rem; background: #fff; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; background: #fff; }
.footer-inner { display: grid; grid-template-columns: 1fr auto auto; gap: 1rem; align-items: center; padding: 1rem 0; }
.footer-nav ul { display: flex; gap: .75rem; list-style: none; margin: 0; padding: 0; }
.footer-brand { display: inline-flex; gap: .5rem; align-items: center; }
.footer-copy { color: var(--muted); }
@media (max-width: 780px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* Prose */
.prose { max-width: 75ch; padding: 2rem 0; }
.prose h1 { margin-top: 0; }
.prose h2 { margin-top: 2rem; }
.prose .note { padding: .75rem 1rem; border-left: 3px solid var(--primary); background: #f1f5f9; color: #334155; border-radius: .25rem; }

/* Accessibility */
.skip-link { position: absolute; left: -999px; top: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--fg); color: #fff; padding: .5rem .75rem; border-radius: .5rem; z-index: 50; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
a:focus-visible { border-radius: .25rem; }

/* A11y helper for visually hidden labels */
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* Ensure hidden attribute reliably hides elements */
[hidden] { display: none !important; }