/* =============================================================================
   Avielon Studio · site.css
   Global foundation (base reset, type utilities, buttons) + site chrome
   (header, footer, mobile menu). Loaded after tokens.css on every page.
   Page-specific section styles live with their own view, not here.
============================================================================= */

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem; line-height: 1.65;
  font-feature-settings: "kern", "liga", "calt";
  text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
  transition: background-color .4s ease, color .4s ease;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; } body { transition: none; }
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--color-focus-ring); outline-offset: 3px; border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-accent); color: var(--color-on-accent);
  padding: .65rem 1rem; z-index: 200; border-radius: var(--radius);
  font-family: var(--font-mono); font-size: .8rem;
}
.skip-link:focus { left: 1rem; top: 1rem; color: var(--color-on-accent); }

.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

/* ---- Type utilities (global, reused across pages) ---- */
.eyebrow {
  font-family: var(--font-mono); font-size: .75rem; font-weight: 500; line-height: 1.4;
  letter-spacing: .18em; text-transform: uppercase; color: var(--color-text-secondary); margin: 0;
}
.eyebrow .mark { color: var(--color-accent); }
.t-display {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(2.75rem, 1.6rem + 4vw, 4.5rem); line-height: 1.05;
  letter-spacing: -0.02em; margin: 0; font-optical-sizing: auto;
}
.t-h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.25rem); line-height: 1.15;
  letter-spacing: -0.01em; margin: 0;
}
.t-h3 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.4rem, 1.1rem + 1vw, 1.75rem); line-height: 1.2;
  letter-spacing: -0.01em; margin: 0;
}
.t-h4 { font-family: var(--font-body); font-weight: 600; font-size: 1.125rem; line-height: 1.35; margin: 0; }
.lead { font-size: clamp(1.05rem, .98rem + .4vw, 1.25rem); line-height: 1.6; color: var(--color-text-secondary); max-width: 56ch; }
.body { color: var(--color-text-secondary); max-width: 64ch; }
.body strong { color: var(--color-text-primary); font-weight: 600; }
.small { font-size: .875rem; line-height: 1.55; }

/* ---- Buttons ---- */
.cta {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-body); font-weight: 600; font-size: .92rem; line-height: 1;
  padding: .8rem 1.3rem; border-radius: var(--radius); cursor: pointer;
  border: 1px solid transparent; white-space: nowrap;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}
.cta-primary { background: var(--color-accent); color: var(--color-on-accent); }
.cta-primary:hover { background: var(--color-accent-hover); color: var(--color-on-accent); transform: translateY(-1px); }
.cta-ghost { background: transparent; color: var(--color-text-primary); border-color: var(--color-border); }
.cta-ghost:hover { border-color: var(--color-text-primary); color: var(--color-text-primary); }
@media (prefers-reduced-motion: reduce) { .cta:hover { transform: none; } }

/* =============================================================================
   HEADER
============================================================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--color-background) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
@supports not (backdrop-filter: blur(1px)) { .site-header { background: var(--color-background); } }
.nav { display: flex; align-items: center; gap: 1.5rem; min-height: 68px; }
.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-display); font-weight: 500; font-size: 1.05rem;
  color: var(--color-text-primary); letter-spacing: -0.01em; white-space: nowrap;
}
.brand:hover { color: var(--color-text-primary); }
.brand .glyph { width: 22px; height: 22px; flex: none; }
.brand .sub {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--color-text-secondary); border-left: 1px solid var(--color-border);
  padding-left: .55rem; margin-left: .15rem;
}
.nav-links { display: flex; align-items: center; gap: 1.6rem; margin-left: auto; list-style: none; padding: 0; }
.nav-links a { color: var(--color-text-secondary); font-size: .92rem; font-weight: 500; padding: .4rem 0; position: relative; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--color-text-primary); }
.nav-links a[aria-current]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1.5px; background: var(--color-accent);
}
.nav-tools { display: flex; align-items: center; gap: .65rem; }

.lang-toggle {
  display: inline-flex; border: 1px solid var(--color-border); border-radius: 999px;
  overflow: hidden; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .06em;
}
.lang-toggle a, .lang-toggle button {
  appearance: none; background: none; border: 0; cursor: pointer;
  padding: .35rem .6rem; color: var(--color-text-secondary); font: inherit; line-height: 1;
}
.lang-toggle [aria-current="true"] { background: var(--color-text-primary); color: var(--color-background); }

.icon-btn {
  appearance: none; cursor: pointer; width: 38px; height: 38px; display: inline-grid; place-items: center;
  border: 1px solid var(--color-border); border-radius: 999px;
  background: var(--color-surface); color: var(--color-text-primary);
  transition: border-color .2s ease, background-color .2s ease;
}
.icon-btn:hover { border-color: var(--color-text-secondary); }
.icon-btn svg { width: 17px; height: 17px; }
.theme-toggle .moon { display: none; }
:root[data-theme='dark'] .theme-toggle .sun { display: none; }
:root[data-theme='dark'] .theme-toggle .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .sun { display: none; }
  :root:not([data-theme]) .theme-toggle .moon { display: block; }
}

.nav-cta { display: inline-flex; }
.menu-btn { display: none; }

/* Mobile menu — reveal keys off the menu element itself */
.mobile-menu { display: none; border-top: 1px solid var(--color-border); background: var(--color-background); }
.mobile-menu.open { display: block; }
.mobile-menu ul { list-style: none; margin: 0; padding: 1rem 0; display: grid; gap: .25rem; }
.mobile-menu a { display: block; padding: .75rem var(--gutter); color: var(--color-text-primary); font-weight: 500; }
.mobile-menu .m-cta { padding: 1rem var(--gutter); }
.mobile-menu .lang-toggle { display: inline-flex; margin: .5rem var(--gutter); }

@media (max-width: 880px) {
  .nav-links, .nav-cta, .lang-toggle { display: none; }
  .menu-btn { display: inline-grid; }
}

/* =============================================================================
   FOOTER
============================================================================= */
.site-footer { border-top: 1px solid var(--color-border); padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer-top { display: grid; gap: clamp(2rem, 5vw, 3rem); }
.footer-brand { display: grid; gap: 1rem; max-width: 34ch; }
.footer-brand .brand { font-size: 1.15rem; }
.footer-brand p { margin: 0; color: var(--color-text-secondary); font-size: .9rem; }
.footer-cols { display: grid; gap: 2rem; }
.footer-col h4 {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--color-text-secondary); margin: 0 0 1rem;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.footer-col a { color: var(--color-text-secondary); font-size: .92rem; }
.footer-col a:hover { color: var(--color-text-primary); }
.footer-bottom {
  margin-top: clamp(2.5rem, 5vw, 3.5rem); padding-top: 1.5rem; border-top: 1px solid var(--color-border);
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.footer-bottom .endorse { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .08em; color: var(--color-text-secondary); }
.footer-bottom .endorse b { color: var(--color-text-primary); font-weight: 500; }
.footer-tools { display: flex; align-items: center; gap: .65rem; }

/* ---- Responsive ---- */
@media (min-width: 720px) {
  .footer-top { grid-template-columns: minmax(0, 1.3fr) minmax(0, 2fr); }
  .footer-cols { grid-template-columns: repeat(3, 1fr); }
}