/**
 * IA Webtech Design System — 02 BASE
 * Global CSS + typography config + container/grid + section system +
 * light/dark section behavior + responsive breakpoints + a11y defaults.
 */

/* ---- Reset-ish ---- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);font-size:var(--text-body);line-height:var(--leading-body);color:var(--text-primary);background:var(--surface);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto}
a{color:var(--brand-primary-600);text-underline-offset:3px}
a:hover{color:var(--brand-primary-700)}
::selection{background:var(--brand-primary-soft)}
p{margin:0 0 1em}
html,body{overflow-x:clip}
@supports not (overflow:clip){html,body{overflow-x:hidden}}

/* ---- Typography scale ---- */
.display{font-size:var(--text-display);line-height:1.05;letter-spacing:-.03em;font-weight:var(--weight-display);margin:0 0 .4em}
h1,.h1{font-size:var(--text-h1);line-height:var(--leading-tight);letter-spacing:-.022em;font-weight:var(--weight-display);margin:0 0 .5em;color:var(--text-primary)}
h2,.h2{font-size:var(--text-h2);line-height:var(--leading-tight);letter-spacing:-.022em;font-weight:var(--weight-h);margin:0 0 .5em;color:var(--text-primary)}
h3,.h3{font-size:var(--text-h3);line-height:1.2;letter-spacing:-.015em;font-weight:680;margin:0 0 .5em;color:var(--text-primary)}
h4,.h4{font-size:1rem;letter-spacing:-.01em;font-weight:700;margin:0 0 .5em;color:var(--text-primary)}
.body-lg{font-size:var(--text-body-lg);line-height:1.6}
.small{font-size:var(--text-small)}
.caption{font-size:var(--text-caption);letter-spacing:.04em}
.muted{color:var(--text-muted)}

/* ---- Accessibility: focus, skip link, tap targets ---- */
:focus-visible{outline:3px solid var(--brand-primary);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--text-primary);color:#fff;padding:10px 18px;z-index:200;border-radius:0 0 10px 0;font-weight:700}
.skip-link:focus{left:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
button,.btn,.nav-toggle{min-height:44px}

/* ---- Container / grid system ---- */
.wrap{max-width:var(--max-content);margin:0 auto;padding-left:max(var(--gutter),env(safe-area-inset-left));padding-right:max(var(--gutter),env(safe-area-inset-right))}
.wrap-wide{max-width:var(--max-wide);margin:0 auto;padding-left:24px;padding-right:24px;padding-left:max(var(--gutter),env(safe-area-inset-left));padding-right:max(var(--gutter),env(safe-area-inset-right))}
.wrap-wide .wp-block-columns{flex-wrap:wrap}
.wrap-wide .wp-block-column{flex:1 1 260px;min-width:0}
.card h3{overflow-wrap:normal}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--grid-gap)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--grid-gap)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* ---- Section system ---- */
.section{padding:var(--section-y) 0}
.section-tight{padding:var(--section-y-tight) 0}
.section-head{max-width:780px;margin-bottom:clamp(24px,4vw,48px)}
.section-head p.lead,.lead{font-size:var(--text-body-lg);color:var(--text-muted);margin:0;max-width:62ch}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:var(--text-caption);font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-primary-600);margin:0 0 12px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand-primary);border-radius:2px;display:inline-block}

/* ---- Light / dark section behavior ---- */
.light-section{background:var(--surface);color:var(--text-primary)}
.tint-mist{background:var(--brand-mist)}
.tint-tech{background:var(--tint-tech)}
.dark-section{background:var(--surface-dark);color:var(--dark-text)}
.on-dark h1,.on-dark h2,.on-dark h3,.on-dark h4,.on-dark p{color:var(--dark-text)}
.on-dark .lead,.on-dark .muted,.on-dark .section-head p.lead{color:var(--dark-muted)}
.on-dark a{color:#8fd496}
.on-dark a:hover{color:#b7e5bd}