/* Birchtech commercial-grade component layer (Oct 2026).
   Brand rules: Inter, teal #1D7686, square corners, no letter-spacing, no gradients, flat teal dark panels.
   Icons: /assets/img/icons.svg sprite (Lucide, ISC). Usage:
   <span class="ico"><svg aria-hidden="true"><use href="/assets/img/icons.svg#i-flask-conical"/></svg></span> */
:root{--x-teal:#1D7686;--x-teal-d:#155D69;--x-tint:#E9F4F5;--x-tint2:#F4F9FA;--x-ink:#16252B;--x-body:#3D4A4F;--x-muted:#5E7480;--x-line:#DCE6E8}

/* ---------- icons */
.ico{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;flex:0 0 48px;background:var(--x-tint);color:var(--x-teal)}
.ico svg{width:24px;height:24px}
.ico--sm{width:36px;height:36px;flex-basis:36px}.ico--sm svg{width:19px;height:19px}
.ico--lg{width:60px;height:60px;flex-basis:60px}.ico--lg svg{width:28px;height:28px}
.ico--solid{background:var(--x-teal);color:#fff}
.ico--line{background:transparent;border:1px solid var(--x-line)}
.ico--bare{background:none;width:auto;height:auto;flex:0 0 auto}
.on-dark .ico,.ico--ondark{background:rgba(255,255,255,.12);color:#fff}
.i-inline{width:1.05em;height:1.05em;vertical-align:-.16em;color:currentColor}

/* ---------- section scaffolding */
.x-sec{padding:clamp(56px,7vw,96px) 0}
.x-sec--tint{background:var(--x-tint2)}
.x-sec--teal{background:var(--x-teal);color:#fff}
.x-sec--teal h2,.x-sec--teal h3,.x-sec--teal p,.x-sec--teal li{color:#fff}
.x-wrap{width:min(1200px,calc(100% - 40px));margin:0 auto}
.x-head{max-width:760px;margin:0 0 clamp(28px,4vw,44px)}
.x-head--center{margin-left:auto;margin-right:auto;text-align:center}
.x-head h2{margin:0 0 12px}
.x-head p{margin:0;font-size:1.125rem;line-height:1.6;color:var(--x-body)}
.x-sec--teal .x-head p{color:rgba(255,255,255,.9)}
.x-kicker{display:inline-flex;align-items:center;gap:8px;font-size:1rem;font-weight:600;color:var(--x-teal);margin:0 0 10px}
.x-sec--teal .x-kicker{color:#fff}

/* ---------- image + text split */
.x-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.x-split--rev .x-split-media{order:2}
.x-split-media{position:relative;margin:0}
.x-split-media img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.x-split-media--tall img{aspect-ratio:4/5}
.x-split-media figcaption,.x-fig figcaption{font-size:.875rem;color:var(--x-muted);margin-top:10px;line-height:1.45}
.x-split-media .x-badge{position:absolute;left:0;bottom:0;background:var(--x-teal);color:#fff;padding:16px 20px;max-width:70%}
.x-badge b{display:block;font-size:1.75rem;line-height:1.1;font-weight:700}
.x-badge span{display:block;font-size:.9rem;line-height:1.4;opacity:.92}
.x-split-body h2{margin:0 0 16px}
.x-split-body p{font-size:1.0625rem;line-height:1.7;color:var(--x-body);margin:0 0 16px}
@media(max-width:860px){.x-split{grid-template-columns:1fr}.x-split--rev .x-split-media{order:0}}

/* ---------- photo mosaic */
.x-mosaic{display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:240px 240px;gap:10px}
.x-mosaic figure{margin:0;position:relative;overflow:hidden;background:#e7eef0}
.x-mosaic figure:first-child{grid-row:span 2}
.x-mosaic img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
.x-mosaic figure:hover img{transform:scale(1.04)}
.x-mosaic figcaption{position:absolute;left:0;bottom:0;background:rgba(22,37,43,.78);color:#fff;font-size:.85rem;padding:7px 12px;line-height:1.35}
.x-mosaic--3{grid-template-columns:repeat(3,1fr);grid-template-rows:300px}
.x-mosaic--3 figure:first-child{grid-row:auto}
@media(max-width:860px){.x-mosaic,.x-mosaic--3{grid-template-columns:1fr 1fr;grid-template-rows:auto}.x-mosaic figure{aspect-ratio:4/3}.x-mosaic figure:first-child{grid-column:span 2;grid-row:auto}}

/* ---------- icon feature grid */
.x-feats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--x-line);border-left:1px solid var(--x-line)}
.x-feats--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.x-feats--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.x-feat{padding:28px 26px 30px;border-right:1px solid var(--x-line);border-bottom:1px solid var(--x-line);background:#fff;transition:background .25s}
.x-feat:hover{background:var(--x-tint2)}
.x-feat .ico{margin-bottom:18px}
.x-feat h3{font-size:1.2rem;line-height:1.3;margin:0 0 8px;color:var(--x-ink)}
.x-feat p{font-size:1rem;line-height:1.6;color:var(--x-body);margin:0}
.x-feat a.x-more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-weight:600;color:var(--x-teal);text-decoration:none}
.x-sec--teal .x-feats{border-color:rgba(255,255,255,.22)}
.x-sec--teal .x-feat{background:transparent;border-color:rgba(255,255,255,.22)}
.x-sec--teal .x-feat:hover{background:rgba(255,255,255,.06)}
.x-sec--teal .x-feat h3,.x-sec--teal .x-feat p{color:#fff}
@media(max-width:980px){.x-feats,.x-feats--4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.x-feats,.x-feats--4,.x-feats--2{grid-template-columns:1fr}}

/* ---------- inline icon list */
.x-ilist{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.x-ilist li{display:flex;gap:14px;align-items:flex-start;line-height:1.55;color:var(--x-body)}
.x-ilist li .ico{margin-top:1px}
.x-ilist b{display:block;color:var(--x-ink);font-weight:600}
.x-checks{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.x-checks li{position:relative;padding-left:30px;line-height:1.55;color:var(--x-body)}
.x-checks li::before{content:"";position:absolute;left:0;top:.2em;width:18px;height:18px;background:var(--x-teal);-webkit-mask:url("/assets/img/check.svg") center/14px no-repeat;mask:url("/assets/img/check.svg") center/14px no-repeat}
.x-checks li::after{content:"";position:absolute;left:0;top:.2em;width:18px;height:18px;border:1px solid var(--x-teal)}

/* ---------- stat strip */
.x-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:3px solid var(--x-teal);background:#fff}
.x-stat{padding:26px 24px;border-right:1px solid var(--x-line)}
.x-stat:last-child{border-right:0}
.x-stat b{display:block;font-size:clamp(2rem,3.4vw,2.75rem);line-height:1.05;font-weight:700;color:var(--x-teal)}
.x-stat span{display:block;margin-top:8px;font-size:.95rem;line-height:1.45;color:var(--x-muted)}
.x-sec--teal .x-stats{background:transparent;border-top-color:#fff}
.x-sec--teal .x-stat{border-color:rgba(255,255,255,.25)}
.x-sec--teal .x-stat b,.x-sec--teal .x-stat span{color:#fff}
@media(max-width:820px){.x-stats{grid-template-columns:1fr 1fr}.x-stat:nth-child(2){border-right:0}.x-stat:nth-child(n+3){border-top:1px solid var(--x-line)}}

/* ---------- image cards */
.x-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.x-cards--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.x-cards--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.x-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--x-line);color:inherit;text-decoration:none;transition:border-color .25s,transform .25s}
a.x-card:hover{border-color:var(--x-teal);transform:translateY(-3px)}
.x-card-img{aspect-ratio:16/10;overflow:hidden;background:#e7eef0}
.x-card-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
a.x-card:hover .x-card-img img{transform:scale(1.04)}
.x-card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.x-card-body small{font-size:.875rem;font-weight:600;color:var(--x-teal)}
.x-card-body h3{font-size:1.2rem;line-height:1.3;margin:0;color:var(--x-ink)}
.x-card-body p{font-size:1rem;line-height:1.6;color:var(--x-body);margin:0}
.x-card-body .x-more{margin-top:auto;padding-top:10px;font-weight:600;color:var(--x-teal);display:inline-flex;gap:6px;align-items:center}
@media(max-width:980px){.x-cards,.x-cards--4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.x-cards,.x-cards--4,.x-cards--2{grid-template-columns:1fr}}

/* ---------- process steps */
.x-steps{display:grid;grid-template-columns:repeat(var(--n,4),minmax(0,1fr));gap:0;counter-reset:st}
.x-step{position:relative;padding:0 22px 0 0}
.x-step .x-step-n{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.x-step .x-step-n::after{content:"";flex:1;height:1px;background:var(--x-line)}
.x-step:last-child .x-step-n::after{display:none}
.x-step h3{font-size:1.15rem;margin:0 0 6px;color:var(--x-ink)}
.x-step p{font-size:1rem;line-height:1.6;color:var(--x-body);margin:0}
.x-sec--teal .x-step .x-step-n::after{background:rgba(255,255,255,.3)}
.x-sec--teal .x-step h3,.x-sec--teal .x-step p{color:#fff}
@media(max-width:860px){.x-steps{grid-template-columns:1fr 1fr;gap:28px 0}}
@media(max-width:560px){.x-steps{grid-template-columns:1fr}}

/* ---------- CTA band with photo */
.x-cta{display:grid;grid-template-columns:1.1fr 1fr;background:var(--x-teal);color:#fff;min-height:340px}
.x-cta-body{padding:clamp(32px,5vw,64px);display:flex;flex-direction:column;justify-content:center;gap:16px}
.x-cta-body h2{color:#fff;margin:0}
.x-cta-body p{color:rgba(255,255,255,.92);font-size:1.0625rem;line-height:1.6;margin:0}
.x-cta-media{margin:0;min-height:260px}
.x-cta-media img{width:100%;height:100%;object-fit:cover;display:block}
.x-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.x-btn{display:inline-flex;align-items:center;gap:8px;padding:13px 20px;font-weight:600;font-size:1rem;text-decoration:none;border:1px solid transparent;transition:background .2s,color .2s,border-color .2s}
.x-btn svg{width:18px;height:18px}
.x-btn--light{background:#fff;color:var(--x-teal)}
.x-btn--light:hover{background:var(--x-tint)}
.x-btn--ghost{border-color:rgba(255,255,255,.7);color:#fff}
.x-btn--ghost:hover{background:rgba(255,255,255,.1)}
.x-btn--teal{background:var(--x-teal);color:#fff}
.x-btn--teal:hover{background:var(--x-teal-d)}
.x-btn--line{border-color:var(--x-teal);color:var(--x-teal);background:#fff}
.x-btn--line:hover{background:var(--x-tint)}
@media(max-width:860px){.x-cta{grid-template-columns:1fr}.x-cta-media{order:-1;height:240px}}

/* ---------- quote / testimonial */
.x-quote{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:start;border-left:3px solid var(--x-teal);padding:6px 0 6px 28px}
.x-quote blockquote{margin:0;font-size:clamp(1.25rem,2vw,1.6rem);line-height:1.45;color:var(--x-ink);font-weight:500}
.x-quote cite{display:block;margin-top:14px;font-style:normal;font-size:1rem;color:var(--x-muted)}
.x-quote cite b{color:var(--x-ink)}

/* ---------- figure with caption */
.x-fig{margin:0}
.x-fig img{display:block;width:100%;height:auto}

/* ---------- logo / membership row */
.x-logos{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(24px,4vw,56px)}
.x-logos img{height:44px;width:auto;filter:grayscale(1);opacity:.75;transition:filter .25s,opacity .25s}
.x-logos img:hover{filter:none;opacity:1}

/* Motion: use the site's existing .reveal class (main.js adds .in on scroll). */

/* Dark-context text: type.css sets running text via --tx; reset inside teal components */
.x-cta,.x-cta *,.x-sec--teal,.x-sec--teal *,.x-badge,.x-badge *,.x-mosaic figcaption{--tx:#fff;--tx-fine:rgba(255,255,255,.9);--lbl:#fff}
.x-cta p,.x-cta h2,.x-cta h3{color:#fff}