/* CNSTECH Portfolio System 2026 — portfolio.css */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0e1117;--bg-card:#161b22;--bg-card-hover:#1c2230;
  --border:#2a2f3a;--border-light:#3a4050;
  --text:#e6edf3;--text-muted:#8b949e;--text-dim:#6e7681;
  --cyan:#00d4ff;--cyan-dim:rgba(0,212,255,.12);--cyan-glow:rgba(0,212,255,.25);
  --accent-green:#3fb950;
  --radius:6px;--radius-lg:10px;
  --max-w:1200px;--transition:220ms ease;
}
html{font-size:16px;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:0s!important;transition-duration:0s!important}}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--cyan);text-decoration:none;transition:color var(--transition)}
a:hover{color:#fff}
.cnstech-portfolio-2026 a{text-decoration:none!important}
.cnstech-portfolio-2026 .project-breadcrumb a,
.cnstech-portfolio-2026 .header-nav a,
.cnstech-portfolio-2026 .footer-col a,
.cnstech-portfolio-2026 .portfolio-card,
.cnstech-portfolio-2026 .portfolio-card *,
.cnstech-portfolio-2026 .btn{text-decoration:none!important}

/* === HEADER === */
.site-header{position:sticky;top:0;z-index:100;background:#08101f;backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:1.15rem 1.25rem;display:flex;align-items:center;justify-content:space-between}
.header-logo img{display:block;width:154px;height:auto}
.header-nav{display:flex;gap:.25rem}
.header-nav a{padding:.5rem .875rem;border-radius:8px;color:#c6d3e8;font-size:.95rem;font-weight:700;background:transparent;transition:background var(--transition),color var(--transition)}
.header-nav a:hover,.header-nav a:focus-visible{color:#fff;background:transparent}
.mobile-menu-btn{display:none;background:none;border:1px solid var(--border);border-radius:var(--radius);padding:.5rem;color:var(--text);cursor:pointer;line-height:0}
.mobile-menu-btn svg{width:22px;height:22px}

@media(max-width:768px){
  .header-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:.5rem 1rem}
  .header-nav.open{display:flex}
  .header-nav a{padding:.75rem 1rem;border-radius:0;border-bottom:1px solid var(--border)}
  .header-nav a:last-child{border-bottom:none}
  .mobile-menu-btn{display:inline-flex}
}

/* === HERO (Archive) === */
.portfolio-hero{position:relative;padding:4rem 1.25rem 3rem;overflow:hidden}
.portfolio-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,212,255,.04) 0%,transparent 50%);pointer-events:none}
.hero-inner{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center}
.hero-text .eyebrow{font-size:.75rem;letter-spacing:.15em;text-transform:uppercase;color:var(--cyan);margin-bottom:.75rem;font-weight:600}
.hero-text h1{font-size:2.25rem;font-weight:700;line-height:1.2;margin-bottom:1rem}
.hero-text .hero-desc{font-size:1rem;color:var(--text-muted);line-height:1.7;margin-bottom:1.75rem;max-width:540px}
.hero-actions{display:flex;gap:.75rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.5rem;border-radius:var(--radius);font-size:.875rem;font-weight:600;cursor:pointer;transition:all var(--transition);border:none}
.btn-primary{background:var(--cyan);color:var(--bg)}
.btn-primary:hover{background:#33dfff;color:var(--bg)}
.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--cyan);color:var(--cyan)}

.hero-collage{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;max-width:460px;justify-self:end}
.hero-collage .collage-img{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);aspect-ratio:4/3;position:relative}
.hero-collage .collage-img img{width:100%;height:100%;object-fit:cover}
.hero-collage .collage-img:first-child{grid-row:1/3;aspect-ratio:3/4}
.hero-collage .collage-accent{position:absolute;inset:0;border:1px solid var(--cyan-glow);border-radius:var(--radius);pointer-events:none;opacity:0;transition:opacity var(--transition)}
.hero-collage .collage-img:hover .collage-accent{opacity:1}

@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .hero-collage{display:none}
  .hero-text h1{font-size:1.75rem}
}

/* === FILTER BAR === */
.portfolio-filter,.portfolio-filters{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 2rem}
.filter-inner{width:100%}
.filter-bar{display:flex;gap:.5rem;flex-wrap:wrap}
.filter-btn{background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);padding:.5rem 1rem;border-radius:20px;font-size:.8125rem;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.filter-btn:hover{border-color:var(--cyan);color:var(--text)}
.filter-btn[aria-pressed="true"]{background:var(--cyan-dim);border-color:var(--cyan);color:var(--cyan)}
.filter-btn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

@media(max-width:600px){
  .filter-bar{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:.5rem;scrollbar-width:none}
  .filter-bar::-webkit-scrollbar{display:none}
}

/* === PROJECT GRID === */
.portfolio-grid{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
@media(max-width:960px){.grid,.portfolio-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.grid,.portfolio-grid{grid-template-columns:1fr}}

.portfolio-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:transform var(--transition),border-color var(--transition),box-shadow var(--transition);display:flex;flex-direction:column;color:var(--text)}
.portfolio-card:hover{transform:translateY(-3px);border-color:var(--cyan-glow);box-shadow:0 8px 30px rgba(0,0,0,.3)}
.portfolio-card:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@media(prefers-reduced-motion:reduce){.portfolio-card:hover{transform:none}}
.portfolio-card__image{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg)}
.portfolio-card__image img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.portfolio-card:hover .portfolio-card__image img{transform:scale(1.03)}
@media(prefers-reduced-motion:reduce){.portfolio-card:hover .portfolio-card__image img{transform:none}}
.portfolio-card__badge{position:absolute;top:.75rem;left:.75rem;background:rgba(14,17,23,.8);border:1px solid var(--border);backdrop-filter:blur(6px);color:var(--cyan);font-size:.6875rem;font-weight:600;padding:.25rem .625rem;border-radius:4px;text-transform:uppercase;letter-spacing:.05em}
.portfolio-card__body{padding:1.125rem;display:flex;flex-direction:column;flex:1}
.portfolio-card__title{font-size:1rem;font-weight:600;margin-bottom:.5rem;line-height:1.35;color:var(--text)}
.portfolio-card__summary{font-size:.8125rem;color:var(--text-muted);line-height:1.6;margin-bottom:.875rem;flex:1}
.portfolio-card__meta{display:flex;gap:.75rem;flex-wrap:wrap;font-size:.75rem;color:var(--text-dim)}
.portfolio-card__meta span{display:inline-flex;align-items:center;gap:.3rem}
.portfolio-card__meta svg{width:13px;height:13px;opacity:.6}

/* No-image card */
.portfolio-card__image--placeholder{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--bg-card) 0%,#1a2030 100%)}
.portfolio-card__image--placeholder svg{width:48px;height:48px;color:var(--border-light);opacity:.5}

/* === METHODOLOGY SECTION === */
.portfolio-methodology{position:relative;overflow:hidden;background:linear-gradient(180deg,#141a22 0%,#111820 100%);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:3.75rem 1.25rem}
.portfolio-methodology::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,212,255,.04),transparent 36%,rgba(0,212,255,.035));pointer-events:none}
.methodology-inner{max-width:var(--max-w);margin:0 auto}
.methodology-inner h2{font-size:1.5rem;font-weight:700;margin-bottom:2rem;text-align:center}
.methodology-grid{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}
.methodology-grid::before{content:"";position:absolute;top:2.08rem;left:7%;right:7%;height:1px;background:linear-gradient(90deg,transparent,rgba(0,212,255,.45),transparent);opacity:.75}
.methodology-card{position:relative;z-index:1;min-width:0;text-align:left;padding:1.25rem 1.1rem 1.2rem;background:linear-gradient(170deg,rgba(255,255,255,.07),rgba(255,255,255,.025));border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);box-shadow:0 18px 34px rgba(0,0,0,.16);transition:transform var(--transition),border-color var(--transition),background var(--transition),box-shadow var(--transition)}
.methodology-card:hover{transform:translateY(-4px);border-color:rgba(0,212,255,.45);background:linear-gradient(170deg,rgba(0,212,255,.08),rgba(255,255,255,.03));box-shadow:0 20px 38px rgba(0,0,0,.28)}
.methodology-card .meth-icon{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;margin:0 0 1rem;border:1px solid rgba(0,212,255,.45);border-radius:999px;background:rgba(0,212,255,.1);box-shadow:0 0 0 6px rgba(0,212,255,.035);color:var(--cyan);font-size:.82rem;font-weight:800;letter-spacing:.04em;animation:methPulse 4.2s ease-in-out infinite}
.methodology-card:nth-child(2) .meth-icon{animation-delay:.35s}
.methodology-card:nth-child(3) .meth-icon{animation-delay:.7s}
.methodology-card:nth-child(4) .meth-icon{animation-delay:1.05s}
.methodology-card h3{font-size:.96rem;font-weight:700;margin-bottom:.5rem;color:#fff}
.methodology-card p{font-size:.835rem;color:var(--text-muted);line-height:1.65}
@keyframes methPulse{0%,100%{box-shadow:0 0 0 6px rgba(0,212,255,.035)}50%{box-shadow:0 0 0 9px rgba(0,212,255,.09)}}
@media(prefers-reduced-motion:reduce){.methodology-card .meth-icon{animation:none}.methodology-card:hover{transform:none}}
@media(max-width:768px){.methodology-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.methodology-grid::before{display:none}}
@media(max-width:480px){.methodology-grid{grid-template-columns:1fr}}

/* === SERVICE CROSS-LINKS === */
.portfolio-services{max-width:var(--max-w);margin:0 auto;padding:3.5rem 1.25rem}
.portfolio-services h2{font-size:1.5rem;font-weight:700;margin-bottom:2rem;text-align:center}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.service-link{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition);color:var(--text)}
.service-link:hover{border-color:var(--cyan);color:var(--cyan);background:var(--cyan-dim)}
.service-link svg{width:18px;height:18px;flex-shrink:0;color:var(--cyan);opacity:.7}
.service-link span{font-size:.875rem;font-weight:500}
@media(max-width:768px){.services-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.services-grid{grid-template-columns:1fr}}

/* === CTA === */
.portfolio-cta{text-align:center;padding:4rem 1.25rem;background:linear-gradient(180deg,transparent 0%,rgba(0,212,255,.03) 100%)}
.portfolio-cta h2{font-size:1.5rem;font-weight:700;margin-bottom:.875rem}
.portfolio-cta p{font-size:.9375rem;color:var(--text-muted);max-width:560px;margin:0 auto 1.75rem;line-height:1.7}
.cta-actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}

/* === FOOTER === */
.site-footer{background:#070d18;border-top:1px solid rgba(255,255,255,.08);padding:2.3rem 1.25rem 1rem}
.footer-grid{max-width:var(--max-w);margin:0 auto;display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:1.2rem}
.footer-brand img{display:block;width:154px;height:auto;margin-bottom:.7rem}
.footer-summary{font-size:.92rem;color:var(--text-muted);line-height:1.6;margin-bottom:.85rem;max-width:36ch}
.footer-review-link{display:inline-flex;align-items:center;min-height:38px;padding:.58rem .85rem;border:1px solid rgba(0,214,255,.35);border-radius:8px;background:rgba(0,214,255,.08);font-size:.92rem;font-weight:800;line-height:1.2;color:var(--cyan);transition:color .15s,border-color .15s,background .15s}
.footer-review-link:hover,.footer-review-link:focus-visible{border-color:rgba(0,214,255,.65);background:rgba(0,214,255,.14);color:#fff}
.footer-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:var(--text-dim);margin:0 0 .55rem;font-weight:800}
.footer-col a,.footer-col span{display:block;font-size:.92rem;color:var(--text-muted);padding:.22rem 0;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-combined a{display:inline;padding:0}
.footer-bottom-inner{max-width:var(--max-w);margin:1.4rem auto 0;padding:1.25rem 0 0;border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.copyright{font-size:.82rem;color:rgba(255,255,255,.45);margin:0}
.footer-legal-separator{color:rgba(255,255,255,.32);margin:0 .35rem}
.copyright .footer-legal-link{color:#ddecff;font-size:inherit;text-decoration:underline!important;text-decoration-color:rgba(0,214,255,.55)!important;text-underline-offset:3px}
.copyright .footer-legal-link:hover{color:var(--cyan);text-decoration-color:currentColor!important}
.footer-social{display:flex;align-items:center;justify-content:flex-end;gap:.55rem;flex-wrap:wrap;margin-left:auto}
.footer-social a{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(0,214,255,.28);border-radius:8px;background:rgba(0,214,255,.06);color:rgba(221,236,255,.78);transition:color .15s,border-color .15s,background .15s,transform .15s}
.footer-social a:hover,.footer-social a:focus-visible{color:var(--cyan);border-color:rgba(0,214,255,.62);background:rgba(0,214,255,.13);transform:translateY(-1px)}
.footer-social svg{width:17px;height:17px;display:block;fill:currentColor}

@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.5rem}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start}
  .footer-social{justify-content:flex-start;margin-left:0}
}

/* === PROJECT SINGLE (project.html) === */
.project-breadcrumb{max-width:var(--max-w);margin:0 auto;padding:1.25rem 1.25rem .5rem;font-size:.8125rem;color:var(--text-dim)}
.project-breadcrumb a{color:var(--text-muted)}
.project-breadcrumb a:hover{color:var(--cyan)}
.project-breadcrumb .sep{margin:0 .5rem;opacity:.5}

.project-hero{max-width:var(--max-w);margin:0 auto;padding:1rem 1.25rem 2.5rem;display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:start}
.project-hero__text h1{font-size:2rem;font-weight:700;line-height:1.25;margin-bottom:1rem}
.project-hero__text .project-summary{font-size:1rem;color:var(--text-muted);line-height:1.7;max-width:520px}
.project-hero__image{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);aspect-ratio:4/3;background:var(--bg-card)}
.project-hero__image img{width:100%;height:100%;object-fit:cover}
@media(max-width:768px){
  .project-hero{grid-template-columns:1fr;gap:1.5rem}
  .project-hero__text h1{font-size:1.5rem}
}

/* Project meta panel */
.project-meta{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 2.5rem}
.meta-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;padding:1.25rem 1.5rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg)}
.meta-grid div{min-width:0}
.meta-grid span{display:block;color:var(--text-dim);font-weight:600;text-transform:uppercase;font-size:.6875rem;letter-spacing:.08em;margin-bottom:.25rem}
.meta-grid strong{display:block;color:var(--text);font-size:.925rem;line-height:1.35}
@media(max-width:768px){.meta-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:480px){.meta-grid{grid-template-columns:1fr}}
.meta-panel{display:flex;gap:2rem;flex-wrap:wrap;padding:1.25rem 1.5rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg)}
.meta-item{font-size:.8125rem}
.meta-item dt{color:var(--text-dim);font-weight:600;text-transform:uppercase;font-size:.6875rem;letter-spacing:.08em;margin-bottom:.25rem}
.meta-item dd{color:var(--text)}

/* Challenge / Solution / Result */
.project-story{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem}
.story-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.story-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;min-width:0}
.story-card h2{font-size:.9375rem;font-weight:700;margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}
.story-card h2 svg{width:18px;height:18px;color:var(--cyan);flex-shrink:0}
.story-card p{font-size:.875rem;color:var(--text-muted);line-height:1.7}
@media(max-width:768px){.story-grid{grid-template-columns:1fr}}

/* Gallery */
.project-gallery{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem}
.project-gallery h2{font-size:1.25rem;font-weight:700;margin-bottom:1.25rem}
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}
.gallery-item{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);cursor:pointer;aspect-ratio:4/3;background:var(--bg-card)}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.gallery-item:hover img{transform:scale(1.03)}
.gallery-item:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@media(prefers-reduced-motion:reduce){.gallery-item:hover img{transform:none}}

/* Tech scope */
.project-scope{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem}
.project-scope h2{font-size:1.25rem;font-weight:700;margin-bottom:1.25rem}
.scope-list,.project-scope ul{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem}
.scope-list li,.project-scope li{display:flex;align-items:flex-start;gap:.5rem;font-size:.875rem;color:var(--text-muted);padding:.375rem 0}
.scope-list li::before,.project-scope li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);margin-top:.55rem;flex-shrink:0}
@media(max-width:600px){.scope-list,.project-scope ul{grid-template-columns:1fr}}

/* Related service CTA */
.project-service-cta{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem}
.service-cta-box{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding:1.25rem 1.5rem;background:var(--cyan-dim);border:1px solid rgba(0,212,255,.2);border-radius:var(--radius-lg)}
.service-cta-box p{font-size:.9375rem;font-weight:500}
.service-cta-box a{font-size:.875rem}
.project-cta{max-width:var(--max-w);margin:0 auto 3rem;padding:1.5rem;background:var(--cyan-dim);border:1px solid rgba(0,212,255,.2);border-radius:var(--radius-lg);text-align:center}
.project-cta h2{font-size:1.35rem;font-weight:700;margin-bottom:.5rem}
.project-cta p{font-size:.9375rem;color:var(--text-muted);max-width:640px;margin:0 auto 1.25rem;line-height:1.7}

/* Related projects */
.project-related{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem 3rem}
.project-related h2{font-size:1.25rem;font-weight:700;margin-bottom:1.25rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
@media(max-width:768px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.related-grid{grid-template-columns:1fr}}

/* === LIGHTBOX === */
.lightbox-overlay{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.9);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .25s ease}
.lightbox-overlay.active{opacity:1;pointer-events:auto}
.lightbox-overlay img{max-width:90vw;max-height:85vh;border-radius:var(--radius);object-fit:contain}
.lightbox-close{position:absolute;top:1rem;right:1.5rem;background:none;border:none;color:#fff;font-size:2rem;cursor:pointer;padding:.5rem;line-height:1}
.lightbox-close:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* === UTILITIES === */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}