/* Ingeniería Luz Verde · blog limpio y accesible */
:root{--forest:#173d2e;--green:#2b8050;--leaf:#dcefd5;--ink:#1f2b24;--muted:#627067;--line:#e0e7e1;--paper:#f7f8f5;--white:#fff;--shadow:0 12px 35px rgba(24,61,46,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit}.wrap{width:min(1160px,92%);margin-inline:auto}
.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(12px)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.logo{text-decoration:none;color:var(--forest);font-size:20px;font-weight:900;letter-spacing:-.6px}.logo span{color:var(--green)}nav{display:flex;align-items:center;gap:22px;flex-wrap:wrap}nav a{text-decoration:none;color:#31463a;font-size:13px;font-weight:750}nav a:hover,nav a[aria-current=page]{color:var(--green)}.nav-cta{background:var(--forest);color:#fff!important;border-radius:999px;padding:10px 16px}
.hero{background:linear-gradient(115deg,#fff 0%,#f3f8f1 60%,#e4f1df 100%);border-bottom:1px solid var(--line);padding:clamp(48px,7vw,82px) 0 43px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:42px;align-items:end}.eyebrow{margin:0 0 13px;color:var(--green);font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:900}.hero h1{max-width:830px;margin:0 0 18px;font-size:clamp(38px,5.3vw,62px);line-height:1.04;letter-spacing:-2.7px;color:var(--forest)}.hero-copy{max-width:720px;margin:0;color:var(--muted);font-size:18px;line-height:1.7}.hero-note{border-left:3px solid var(--green);padding:2px 0 2px 20px;color:var(--muted);font-size:14px}.hero-note strong{display:block;color:var(--forest);font-size:17px;margin-bottom:5px}.stats{display:flex;gap:9px;flex-wrap:wrap;margin-top:27px}.stat{display:inline-flex;align-items:center;gap:7px;border:1px solid #dce9d8;background:#fff;border-radius:999px;padding:8px 12px;color:#435447;font-size:12px;font-weight:750}.stat b{color:var(--forest)}
.controls{padding:28px 0 8px}.control-row{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:12px}input,select{width:100%;min-height:52px;padding:13px 16px;border:1px solid #d5dfd6;border-radius:12px;background:#fff;font:inherit;color:var(--ink)}input:focus,select:focus{outline:3px solid #2b805022;border-color:var(--green)}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 0}.filter-btn{border:1px solid var(--line);background:#fff;color:#46574a;border-radius:999px;padding:8px 13px;font:inherit;font-size:12px;font-weight:800;cursor:pointer}.filter-btn:hover,.filter-btn[aria-pressed=true]{background:var(--forest);color:#fff;border-color:var(--forest)}.result-count{display:flex;justify-content:space-between;gap:12px;align-items:center;color:var(--muted);font-size:13px;padding:18px 0 10px}.result-count strong{color:var(--forest)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px;padding:8px 0 60px}.card{min-width:0;display:flex;flex-direction:column;padding:22px 22px 19px;background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:0 2px 10px rgba(24,61,46,.025);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bed5c2}.card-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:15px}.tag{display:inline-flex;align-items:center;border-radius:999px;background:#edf5e9;color:#326d47;padding:5px 9px;font-size:10px;font-weight:900;letter-spacing:.015em}.lang{font-size:10px;font-weight:800;color:#78857b}.card h2{margin:0 0 11px;color:var(--forest);font-size:19px;line-height:1.28;letter-spacing:-.35px}.card h2 a{text-decoration:none}.card h2 a:hover{color:var(--green)}.card p{margin:0 0 20px;color:var(--muted);font-size:13.5px;line-height:1.7;flex:1}.read-link{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:14px;border-top:1px solid #edf0ed;text-decoration:none;color:var(--green);font-size:12px;font-weight:900}.read-link span{font-size:17px}.empty{display:none;grid-column:1/-1;border:1px dashed #ccd8ce;background:#fff;border-radius:16px;padding:34px;text-align:center;color:var(--muted)}.empty.show{display:block}.card[hidden]{display:none!important}
.contact-band{background:var(--forest);color:#fff;padding:35px 0;margin:8px 0 0}.contact-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}.contact-band h2{font-size:clamp(22px,3vw,30px);line-height:1.2;margin:0 0 7px;letter-spacing:-.7px}.contact-band p{margin:0;color:#d5e4d9;font-size:14px}.contact-link{white-space:nowrap;border-radius:999px;background:#d8edca;color:var(--forest);padding:12px 18px;text-decoration:none;font-size:13px;font-weight:900}footer{padding:24px 0;color:#68766c;font-size:12px}.footer-inner{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}footer a{color:var(--forest);text-decoration:none;font-weight:750}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-grid{grid-template-columns:1fr;gap:24px}.hero-note{max-width:600px}.hero h1{letter-spacing:-1.8px}}@media(max-width:600px){.nav{padding:13px 0}.nav,nav{gap:12px}nav{width:100%}nav a{font-size:12px}.nav-cta{padding:8px 11px}.hero{padding-top:42px}.hero h1{font-size:39px}.hero-copy{font-size:16px}.control-row{grid-template-columns:1fr}.grid{grid-template-columns:1fr;gap:12px}.card{padding:20px}.contact-inner{align-items:flex-start;flex-direction:column}.contact-link{white-space:normal}.result-count{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Ilustraciones originales optimizadas para las guías del blog */
.blog-hero-image{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:18px;margin:10px 0 30px;border:1px solid #dce7de;background:#f1f6f0}
.ilv-article-illustration{max-width:980px;margin:34px auto 38px;padding:0;border:1px solid #dfe9df;border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 8px 28px rgba(20,60,38,.06)}
.ilv-article-illustration img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.ilv-article-illustration figcaption{padding:11px 16px 13px;color:#5e7164;font-size:13px;line-height:1.5;border-top:1px solid #e7eee7}
@media(max-width:600px){.blog-hero-image,.ilv-article-illustration{border-radius:12px}.ilv-article-illustration{margin:25px auto}}