/* ==========================================================================
   StileSense — Base: reset, typography, layout, header, footer
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: var(--bg); color: var(--text);
  font-family: var(--font-body); font-size: var(--fs-base); line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
main { flex: 1; }
img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--link); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(192,38,126,.18); }

h1, h2, h3, h4 { margin: 0 0 var(--space-4); line-height: var(--lh-snug); color: var(--text); }
h1, h2, .display { font-family: var(--font-display); font-weight: 500; letter-spacing: -.02em; font-optical-sizing: auto; }
h1 { font-size: var(--fs-3xl); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-2xl); line-height: 1.12; }
h3 { font-size: var(--fs-lg); font-weight: 650; letter-spacing: -.01em; }
h4 { font-size: var(--fs-base); font-weight: 650; }
p { margin: 0 0 var(--space-4); }
em.serif, .serif-i { font-family: var(--font-display); font-style: italic; font-weight: 400; }
.lead { font-size: var(--fs-lg); color: var(--text-muted); max-width: 62ch; }
.muted { color: var(--text-muted); }
.small { font-size: var(--fs-sm); }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: var(--fs-xs); font-weight: 650; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent); margin-bottom: var(--space-4);
}
.eyebrow::before { content: ""; width: 22px; height: 1.5px; background: currentColor; border-radius: 2px; }
.grad-text { background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }
:root[data-theme="dark"] .grad-text { background: linear-gradient(120deg,#ffb3dc,#ff6fb0 50%,#b69cff); -webkit-background-clip: text; background-clip: text; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .grad-text { background: linear-gradient(120deg,#ffb3dc,#ff6fb0 50%,#b69cff); -webkit-background-clip: text; background-clip: text; } }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--text); color: var(--bg); padding: .6rem 1rem; border-radius: 10px; }
.skip-link:focus { top: 12px; }

/* ---- Layout ---------------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container.narrow { max-width: 820px; }
.section { padding-block: var(--space-9); position: relative; }
.section.tight { padding-block: var(--space-8); }
.section.tinted { background: var(--surface-tint); }
.section.sunken { background: var(--bg-sunken); }
.section-head { max-width: 760px; margin-bottom: var(--space-7); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .lead { margin-inline: auto; }
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.grid-5 { grid-template-columns: repeat(5, minmax(0,1fr)); }
@media (max-width: 1080px) { .grid-5 { grid-template-columns: repeat(3, minmax(0,1fr)); } .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 820px)  { .grid-3, .grid-5 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 600px)  { .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; } }
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--space-8); align-items: center; }
.split.reverse > :first-child { order: 2; }
@media (max-width: 920px) { .split { grid-template-columns: 1fr; gap: var(--space-7); } .split.reverse > :first-child { order: 0; } }
.stack > * + * { margin-top: var(--space-4); }
.center { text-align: center; }

/* ---- Header ---------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-bottom-color: var(--border); box-shadow: 0 6px 24px -18px rgba(42,15,42,.35); }
.header-inner { height: 100%; display: flex; align-items: center; gap: var(--space-5); }
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--brand); flex-shrink: 0; }
.brand-mark { width: 34px; height: 34px; }
.brand-word { font-family: var(--font-display); font-size: 1.5rem; font-weight: 500; letter-spacing: -.02em; line-height: 1; }
.brand-word i { font-style: italic; color: var(--accent); font-weight: 400; }
.primary-nav { margin-left: auto; }
.primary-nav ul { list-style: none; display: flex; gap: .25rem; margin: 0; padding: 0; align-items: center; }
.primary-nav a {
  display: block; padding: .5rem .8rem; border-radius: var(--radius-pill);
  color: var(--text-muted); text-decoration: none; font-size: .95rem; font-weight: 500; transition: color .2s, background .2s;
}
.primary-nav a:hover { color: var(--text); background: var(--bg-sunken); }
.primary-nav a[aria-current="page"] { color: var(--brand); background: var(--surface-tint); }
.header-actions { display: flex; align-items: center; gap: .5rem; }
.icon-btn {
  width: 40px; height: 40px; display: inline-grid; place-items: center; border-radius: 50%;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text); cursor: pointer; transition: background .2s, transform .2s;
}
.icon-btn:hover { background: var(--bg-sunken); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-toggle .i-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: block; }
.nav-toggle { display: none; }
@media (max-width: 1000px) {
  .nav-toggle { display: inline-grid; }
  .header-actions .header-cta { display: none; }
  .header-actions { margin-left: auto; }
  .primary-nav {
    position: fixed; inset: var(--header-h) 0 auto 0; background: var(--bg-elev);
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    padding: var(--space-4) var(--gutter) var(--space-6);
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: .25s var(--ease);
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .primary-nav.open { transform: none; opacity: 1; visibility: visible; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .primary-nav a { padding: .85rem 1rem; font-size: 1.05rem; border-radius: 12px; }
  .primary-nav .mobile-cta { display: block; margin-top: var(--space-3); }
  .primary-nav .mobile-cta a { background: var(--text); color: var(--bg); text-align: center; }
}
.primary-nav .mobile-cta { display: none; }

/* ---- Footer ---------------------------------------------------------------- */
.site-footer { background: var(--plum-900); color: #e9dcea; padding-top: var(--space-8); margin-top: 0; }
.site-footer a { color: #f3e6f2; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: var(--space-6); padding-bottom: var(--space-7); }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
.footer-brand .brand { color: #fff; }
.footer-brand .brand-word i { color: #ff8cc6; }
.footer-brand p { color: #cdb8cf; max-width: 36ch; margin-top: var(--space-4); }
.footer-col h2 { font-family: var(--font-body); font-size: var(--fs-xs); letter-spacing: .16em; text-transform: uppercase; color: #b99fbc; font-weight: 650; margin-bottom: var(--space-4); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; font-size: .95rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-block: var(--space-5); display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5); justify-content: space-between; font-size: var(--fs-sm); color: #b99fbc; }
.footer-bottom p { margin: 0; }
.footer-principle { font-family: var(--font-display); font-style: italic; color: #f3d5ea; }