/* Data Center Systems — Filter Solutions S.L. Corporate visual identity */
:root{color-scheme:light;--brand:#00899b;--brand-dark:#006e7e;--brand-wash:#eaf6f7;--ink:#1a1a18;--body:#405157;--line:#e0e7e8;--canvas:#fff;--paper:#f6f9f9;--container:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--canvas);color:var(--ink);font:400 16px/1.55 Arial,'Helvetica Neue',Helvetica,sans-serif;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button,input,select,textarea{font:inherit}button{cursor:pointer}p,h1,h2,h3{margin:0}p{line-height:1.7}h1,h2,h3{letter-spacing:-.037em;line-height:1.13}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--brand);outline-offset:4px}.container{max-width:calc(var(--container) + 52px);margin-inline:auto;padding-inline:26px}.skip{position:absolute;left:14px;top:-150px;background:white;border:2px solid var(--brand);padding:12px;z-index:99}.skip:focus{top:10px}
/* header follows Filter Solutions corporate visual language */
.corporate-bar{background:#202526;color:#eff5f5;font-size:11px;letter-spacing:.01em}.corporate-bar-inner{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:12px}.corporate-bar a{color:#a8e8ed;font-weight:700}.corporate-bar a:hover{text-decoration:underline}.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.98);border-bottom:1px solid #e2e7e8;box-shadow:0 2px 13px rgba(0,0,0,.04)}.header-row{min-height:88px;display:flex;align-items:center;gap:25px;justify-content:space-between}.corporate-identity{display:flex;align-items:center;flex-shrink:0;gap:16px}.corporate-logo{display:block;line-height:0}.corporate-logo img{display:block;width:206px;height:auto}.brand-rule{height:42px;width:1px;background:#c8d1d3}.specialism{display:flex;flex-direction:column;color:#222;letter-spacing:.07em;line-height:1.1;font-size:14px;font-weight:750}.specialism span{color:var(--brand);font-size:12px;letter-spacing:.22em;font-weight:700;margin-top:5px}.desktop-nav{display:flex;align-items:center;gap:19px;margin-left:auto}.desktop-nav a{white-space:nowrap;color:#293638;font-size:12px;font-weight:700}.desktop-nav a:hover{color:var(--brand)}.nav-actions{display:flex;align-items:center;gap:16px}.language-switch{display:flex;gap:5px;align-items:center;color:#9ba7a9;font-size:12px;font-weight:750;white-space:nowrap}.language-switch a{color:#4c646a}.language-switch [aria-current=page]{color:var(--brand)}.language-switch a:hover{color:var(--brand)}.btn{border:1px solid transparent;display:inline-flex;justify-content:center;align-items:center;gap:13px;white-space:nowrap;font-weight:750;font-size:13px;letter-spacing:.015em;transition:background .18s,color .18s,transform .18s;cursor:pointer}.btn:hover{transform:translateY(-1px)}.btn span{font-size:17px;font-weight:400}.btn-small{padding:11px 15px;min-height:39px}.btn-large{padding:15px 22px;min-height:52px}.btn-accent{background:var(--brand);color:#fff}.btn-accent:hover{background:var(--brand-dark)}.btn-outline{background:transparent;color:var(--ink);border-color:#b6c7ca}.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:#fff}.menu-toggle,.mobile-nav{display:none}
/* Image-free headline, technical visual kept intentionally as a schematic */
.hero{background:radial-gradient(circle at 93% 18%,#ddf1f3 0,transparent 31%),linear-gradient(180deg,#fff 0,#f5f9f9 100%);position:relative;overflow:hidden;padding:72px 0 65px}.hero::before{content:"";position:absolute;right:-75px;top:30px;width:450px;height:450px;border:1px solid #e0ebed;border-radius:50%;pointer-events:none}.hero-orb{display:none}.hero-inner{display:grid;grid-template-columns:minmax(0,1.47fr) minmax(260px,.53fr);gap:28px 56px;align-items:start;position:relative}.hero-copy{min-width:0}.eyebrow,.section-label{display:flex;align-items:center;gap:12px;font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--brand);text-transform:uppercase}.eyebrow-line{height:2px;width:27px;background:var(--brand);flex:none}h1{font-size:clamp(42px,4.6vw,68px);line-height:1.105;font-weight:780;max-width:835px;letter-spacing:-.046em;margin:24px 0}h1 span{color:var(--brand)}.hero-lead{color:var(--body);font-size:clamp(16px,1.55vw,19px);max-width:715px;line-height:1.64}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.trust-line{display:flex;flex-wrap:wrap;gap:22px;margin-top:31px;color:#53676c;font-size:12px;font-weight:600}.trust-line span{display:flex;gap:8px;align-items:center}.trust-line i{width:7px;height:7px;background:var(--brand);border-radius:50%;display:inline-block}.hero-panel{margin-top:31px;border-top:4px solid var(--brand);background:#fff;box-shadow:0 15px 45px rgba(15,55,59,.07);padding:28px 28px 26px;align-self:start}.hero-panel-label{font-size:10px;font-weight:850;letter-spacing:.18em;color:var(--brand)}.hero-panel-title{font-size:24px;font-weight:750;letter-spacing:-.04em;line-height:1.15;margin:13px 0 19px}.hero-panel-detail{display:flex;gap:13px;padding:15px 0;border-top:1px solid #e8eeee;align-items:flex-start}.hero-number{color:var(--brand);font-size:10px;font-weight:800;letter-spacing:.06em;padding-top:2px}.hero-panel-detail div{display:flex;flex-direction:column;gap:4px}.hero-panel-detail strong{font-size:14px}.hero-panel-detail small{font-size:11px;color:#627579}.hero-panel p{font-size:11px;color:#67787d;border-top:1px solid #e8eeee;padding-top:14px;margin-top:4px}.hero-visual{grid-column:1/-1;margin-top:16px}.diagram-shell{border:1px solid #accbd0;background:linear-gradient(150deg,#143746,#0d2634);overflow:hidden;box-shadow:0 18px 47px rgba(15,45,48,.08)}.diagram-top,.diagram-bottom{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 23px}.diagram-top{border-bottom:1px solid #456170}.diagram-bottom{border-top:1px solid #456170}.overline{font-size:10px;font-weight:750;letter-spacing:.13em;color:#dfedf1}.diagram-status{font-size:10px;letter-spacing:.05em;color:#c1d7db}.dot{width:7px;height:7px;background:#47d0bb;border-radius:50%;display:inline-block;margin-right:6px}.diagram-visual{padding:0 18px}.flow-svg{display:block;width:100%;height:auto}.diagram-bottom p{font-size:11px;color:#c2d2d9;max-width:620px}.diagram-specs{display:flex;gap:7px;flex-wrap:wrap}.diagram-specs span{font-size:9px;font-weight:750;letter-spacing:.035em;color:#d5f5ee;border:1px solid #497e7d;padding:5px 9px}
/* clean white sections, precise corporate teal accents */
.section{padding:95px 0}.solutions{background:#fff;color:var(--ink)}.section-heading{display:grid;grid-template-columns:1.1fr .9fr;gap:75px;align-items:end;margin-bottom:37px}.section h2,.regulatory h2,.contact-section h2{font-size:clamp(33px,3.4vw,48px);line-height:1.14;font-weight:760;margin:15px 0 0}.section-heading p,.eng-intro>p{color:var(--body);font-size:15px}.solution-grid{display:grid;grid-template-columns:1.12fr 1fr 1fr;gap:17px}.solution-card{display:flex;flex-direction:column;min-height:305px;border:1px solid #e2e9ea;border-top:4px solid #cadcde;background:#fff;padding:29px;box-shadow:0 8px 29px rgba(0,0,0,.035)}.primary-card{border-top-color:var(--brand);background:#f0f9fa}.card-icon{height:45px;width:45px;display:grid;place-items:center;color:var(--brand);background:#e4f4f5}.card-icon svg{width:24px;height:24px}.card-tag{font-size:10px;font-weight:800;letter-spacing:.13em;color:var(--brand);margin-top:22px}.solution-card h3{font-size:24px;margin:8px 0 12px}.solution-card p{color:#52666b;font-size:13px}.card-bottom{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:20px}.card-bottom span{font-size:9px;letter-spacing:.05em;color:#52666b;border:1px solid #cbd8da;padding:4px 7px;font-weight:750}.engineering{background:#f5f8f8}.eng-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:75px}.eng-intro>p{margin-top:20px}.engineering-art{position:relative;margin-top:30px;height:180px;background:#e9f3f4;border:1px solid #cddfe1;overflow:hidden}.art-circles{position:absolute;right:45px;top:14px;width:170px;height:170px}.art-circles div{position:absolute;inset:0;border:1px solid #85bdc4;border-radius:50%}.art-circles div:nth-child(2){inset:25px;border-color:#4cabb6}.art-circles div:nth-child(3){inset:52px;background:#c2e5e8;border-color:var(--brand)}.art-label{position:absolute;left:25px;bottom:22px;font-size:11px;color:#477079;letter-spacing:.13em;line-height:1.7}.art-label strong{font-size:22px;color:var(--brand);letter-spacing:0}.art-line{position:absolute;left:25%;top:32%;width:100px;height:1px;background:var(--brand);transform:rotate(-18deg);opacity:.4}.l2{top:68%;left:50%}.l3{top:17%;left:48%}.feature-list{border-top:1px solid #cedbde}.feature{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid #cedbde}.feature-no{min-width:35px;color:var(--brand);font-size:12px;font-weight:850}.feature h3{font-size:21px;margin-bottom:8px}.feature p{color:#5a6b70;font-size:14px}.process{background:#fff}.process h2{max-width:685px}.step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin-top:43px}.step-card{background:#f7fafa;border:1px solid #e1e9e9;border-top:3px solid var(--brand);padding:23px 22px;min-height:215px}.step-no{color:var(--brand);font-size:25px;font-weight:800}.step-card h3{font-size:20px;margin:26px 0 10px}.step-card p{font-size:13px;color:#52666b}.regulatory{background:#222a2b;color:#fff;padding:65px 0}.reg-layout{display:grid;grid-template-columns:.89fr 1.11fr;gap:85px}.regulatory h2{font-size:clamp(30px,3.1vw,43px)}.regulatory .section-label{color:#73d0d9}.reg-copy p{font-size:15px;color:#d7e1e2}.reg-copy>a{display:inline-block;color:#8bdfe5;border-bottom:1px solid #8bdfe5;font-size:13px;font-weight:700;margin-top:19px;padding-bottom:4px}.reg-copy small{display:block;font-size:11px;color:#adbec0;line-height:1.6;margin-top:16px}.faq{background:#fff}.faq-layout{display:grid;grid-template-columns:.78fr 1.22fr;gap:75px}.faq-items{border-top:1px solid #d6e1e2}.faq-item{padding:22px 0;border-bottom:1px solid #d6e1e2}.faq-item summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:16px;font-weight:750;line-height:1.4}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary span{font-size:23px;line-height:1;color:var(--brand);transition:transform .15s}.faq-item[open] summary span{transform:rotate(45deg)}.faq-item p{max-width:670px;margin-top:14px;padding-right:32px;font-size:14px;color:#566a6e}
/* contact, linked to real corporate email, no fake silent submission */
.contact-section{background:#eaf5f6;color:var(--ink);padding:90px 0}.contact-layout{display:grid;grid-template-columns:.77fr 1.23fr;gap:74px;align-items:start}.contact-copy h2{font-size:clamp(33px,3.35vw,48px);margin-bottom:22px}.contact-copy>p{color:#52676b;font-size:15px}.contact-email{display:flex;flex-direction:column;gap:8px;margin-top:36px}.contact-email>span{color:#63787c;font-size:12px}.contact-email a{font-size:18px;font-weight:750;color:var(--brand-dark);overflow-wrap:anywhere}.contact-accent{font-size:104px;font-weight:850;letter-spacing:-.1em;color:#b8dce0;margin-top:40px}.contact-accent span{color:#8dbcc2}.lead-form{background:#fff;border:1px solid #d7e4e6;border-top:4px solid var(--brand);box-shadow:0 20px 48px rgba(34,76,79,.07);padding:32px;display:flex;flex-direction:column;gap:17px}.lead-form label{display:flex;flex-direction:column;gap:7px;font-size:12px;font-weight:750;color:#2e4145}.lead-form label>span[aria-hidden]{color:var(--brand)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.lead-form input:not([type=checkbox]),.lead-form select,.lead-form textarea{width:100%;background:#fff;color:#293e43;border:1px solid #cad9dc;border-radius:0;min-height:45px;padding:12px 13px;font-size:13px;outline:none;font-weight:480}.lead-form input::placeholder,.lead-form textarea::placeholder{color:#85969a}.lead-form input:focus,.lead-form select:focus,.lead-form textarea:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(0,137,155,.12)}.lead-form textarea{resize:vertical;min-height:108px}.lead-form select{appearance:none;background-image:url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="none" stroke="%2300899b" stroke-width="2"%3E%3Cpath d="m3 6 5 5 5-5"/%3E%3C/svg%3E');background-repeat:no-repeat;background-position:right 13px center}.lead-form .check-label{display:flex;flex-direction:row;gap:10px;align-items:flex-start;margin-top:2px;line-height:1.5;color:#536a6e;font-weight:450}.check-label input{accent-color:var(--brand);width:17px;height:17px;flex:none;margin:2px 0}.check-label a{text-decoration:underline;color:var(--brand-dark)}.btn-submit{width:100%}.form-note{font-size:11px;color:#698084;text-align:center;line-height:1.5}
.footer{background:#f9fbfb;border-top:1px solid #dae5e6;color:#263a3e}.footer-main{display:grid;grid-template-columns:1.65fr .7fr 1fr;gap:50px;padding-top:57px;padding-bottom:45px}.footer .corporate-identity{gap:13px}.footer .corporate-logo img{width:193px}.footer .brand-rule{height:38px}.footer .specialism{font-size:12px}.footer .specialism span{font-size:10px}.footer-brand>p{font-size:12px;color:#5f7377;margin-top:18px;max-width:360px}.footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:12px}.footer-links strong{font-size:11px;font-weight:800;letter-spacing:.055em;color:#1b3337;margin-bottom:8px}.footer-links>a{font-size:12px;color:#526a6f}.footer-links a:hover{color:var(--brand);text-decoration:underline}.footer-bottom{border-top:1px solid #d9e4e6;display:flex;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:24px;color:#7b8a8e;font-size:10px}
@media(max-width:1170px){.header-row{gap:17px}.desktop-nav{gap:13px}.desktop-nav a{font-size:11px}.nav-actions{gap:9px}.corporate-logo img{width:175px}.corporate-identity{gap:12px}.specialism{font-size:12px}.specialism span{font-size:10px}.nav-cta{font-size:11px;padding-inline:11px}.hero-inner{gap:22px 35px}}
@media(max-width:930px){.desktop-nav{display:none}.nav-cta{display:none}.menu-toggle{display:flex;width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:5px;padding:8px;border:1px solid #d0dddf;background:#fff}.menu-toggle span{height:2px;width:22px;background:#26383c}.mobile-nav:not([hidden]){display:flex;flex-direction:column;gap:0;background:#fff;border-top:1px solid #e1e9eb;padding:10px 26px 19px}.mobile-nav a{padding:10px;font-size:14px;font-weight:700;color:#31494d;border-bottom:1px solid #f0f2f2}.hero-inner{grid-template-columns:1fr}.hero-panel{max-width:none;margin-top:0;display:grid;grid-template-columns:repeat(3,1fr);gap:4px 18px}.hero-panel-label,.hero-panel-title,.hero-panel>p{grid-column:1/-1}.hero-panel-title{margin:8px 0 4px}.hero-panel-detail{border-bottom:1px solid #e7eeee}.hero-visual{margin-top:4px}.section{padding:78px 0}.section-heading,.eng-grid,.faq-layout,.reg-layout,.contact-layout{grid-template-columns:1fr;gap:35px}.section-heading{margin-bottom:26px}.solution-grid{grid-template-columns:1fr 1fr}.primary-card{grid-column:1/-1}.solution-card{min-height:245px}.engineering-art{display:none}.step-grid{grid-template-columns:1fr 1fr}.footer-main{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.contact-accent{display:none}}
@media(max-width:610px){.container{padding-inline:18px}.corporate-bar{font-size:9px}.corporate-bar-inner{min-height:29px}.corporate-bar-inner>a{white-space:nowrap}.header-row{min-height:74px}.corporate-logo img{width:146px}.brand-rule{height:32px}.corporate-identity{gap:8px}.specialism{font-size:10px;letter-spacing:.02em}.specialism span{font-size:9px;letter-spacing:.08em;margin-top:3px}.nav-actions{gap:9px}.language-switch{font-size:11px}.menu-toggle{width:35px;height:35px}.menu-toggle span{width:19px}.hero{padding:45px 0 48px}h1{font-size:clamp(35px,9.4vw,52px);margin:18px 0}.hero-lead{font-size:15px}.hero-actions{align-items:stretch;flex-direction:column}.btn-large{font-size:13px}.trust-line{gap:10px 18px;margin-top:23px}.hero-panel{display:block;padding:22px}.hero-panel-detail{padding:12px 0}.hero-panel-title{font-size:23px}.hero-visual{margin-top:0}.diagram-top,.diagram-bottom{padding:14px}.diagram-top .overline{font-size:9px}.diagram-status{display:none}.diagram-visual{padding:0;overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-color:#4dabb6 #123440}.diagram-visual .flow-svg{width:690px;max-width:none}.diagram-bottom{align-items:flex-start;flex-direction:column}.section{padding:63px 0}.section h2,.regulatory h2,.contact-section h2{font-size:33px}.section-heading{gap:17px}.solution-grid{grid-template-columns:1fr}.primary-card{grid-column:auto}.solution-card{min-height:0;padding:24px}.step-grid{grid-template-columns:1fr;gap:10px}.step-card{min-height:0}.step-card h3{margin-top:11px}.regulatory{padding:56px 0}.faq-layout{gap:12px}.contact-section{padding:60px 0}.lead-form{padding:20px}.form-grid{grid-template-columns:1fr}.footer-main{grid-template-columns:1fr 1fr;gap:25px;padding-top:43px}.footer-brand{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:7px}.footer .corporate-logo img{width:175px}}
@media(max-width:420px){.corporate-logo img{width:128px}.brand-rule{height:28px}.specialism{font-size:9px}.specialism span{font-size:8px}.corporate-identity{gap:6px}.nav-actions{gap:7px}.corporate-bar-inner{gap:5px}.corporate-bar-inner span:first-child{max-width:220px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* filtersolutions.tech family: corporate six-item navigation and shared CTA */
.mobile-schematic{display:none}
@media(max-width:610px){.diagram-visual .flow-svg{display:none}.mobile-schematic{list-style:none;display:grid;gap:8px;margin:0;padding:19px}.mobile-schematic li{display:flex;gap:15px;align-items:center;background:rgba(255,255,255,.06);border:1px solid #42616b;padding:12px 14px;color:#e7f5f7;font-size:13px}.mobile-schem-no{color:#75ded1;font-weight:800;font-size:12px}.diagram-visual{overflow-x:visible}}

.desktop-nav{gap:14px}.desktop-nav a{font-size:12px}.corporate-identity{gap:12px}.corporate-logo img{max-width:190px;height:auto}.header-row{min-height:82px}.header-row .specialism{font-size:12px;letter-spacing:.08em;min-width:79px}.header-row .specialism span{font-size:10px;letter-spacing:.13em}.header-row .brand-rule{height:36px}.nav-cta{white-space:nowrap}.btn-small{padding:11px 12px}.hero{padding-top:56px}.hero-copy h1{max-width:850px}.site-crosslink{margin:-10px 0 28px;color:#5d7578;font-size:13px}.site-crosslink a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px}.contact-card{gap:15px}.contact-card h3{font-size:25px;margin:0;letter-spacing:-.025em}.spec-list{padding:0;margin:0 0 9px;display:grid;gap:12px;list-style:none;color:#42565c;font-size:14px}.spec-list li{display:flex;align-items:flex-start;gap:12px}.spec-list li:before{content:'✓';color:var(--brand);font-weight:800;flex:none}.contact-card .btn-outline:hover{background:#f5fafa}.mini-foot-note{color:var(--brand)!important;font-size:11px!important;font-weight:750;letter-spacing:.04em}.footer-links span{font-size:12px;color:#526a6f;line-height:1.7}.legal-links{display:flex;flex-wrap:wrap;gap:14px}.legal-links a:hover{color:var(--brand);text-decoration:underline}.contact-email a:last-child{font-size:15px}.footer .footer-brand .corporate-logo img{width:193px}
@media(max-width:1230px){.desktop-nav{gap:10px}.desktop-nav a{font-size:11px}.header-row{gap:12px}.nav-actions{gap:9px}.corporate-logo img{max-width:164px}}
@media(max-width:1080px){.desktop-nav{display:none}.nav-cta{display:none}.menu-toggle{display:flex;width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:5px;padding:8px;border:1px solid #d0dddf;background:#fff}.menu-toggle span{height:2px;width:22px;background:#26383c}.mobile-nav:not([hidden]){display:flex;flex-direction:column;gap:0;background:#fff;border-top:1px solid #e1e9eb;padding:10px 26px 19px}.mobile-nav a{padding:10px;font-size:14px;font-weight:700;color:#31494d;border-bottom:1px solid #f0f2f2}}
@media(max-width:610px){.header-row{min-height:73px}.corporate-logo img{max-width:145px}.header-row .specialism{font-size:10px;min-width:65px}.header-row .specialism span{font-size:9px}.header-row .brand-rule{height:32px}.hero{padding-top:45px}.site-crosslink{margin:0 0 22px}}
@media(max-width:390px){.corporate-logo img{max-width:127px}.header-row .specialism{min-width:55px;font-size:9px}.header-row .specialism span{font-size:8px}}