@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-sans-400.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/ibm-plex-sans-500.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:600;font-display:swap;src:url(fonts/ibm-plex-sans-600.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-mono-400.woff2) format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(fonts/ibm-plex-mono-500.woff2) format('woff2');}

:root{
  --bg:#F5F4F1; --paper:#FFFFFF; --ink:#1F2328; --ink-2:#3D434A; --muted:#565C64;
  --line:#DAD7D0; --accent:#2C5A85; --accent-dark:#1E4266;
  --dark:#16191D; --dark-ink:#ECEAE5; --dark-muted:#BFC3C8; --dark-accent:#8FB3D6;
  --pad:80px;
  --sans:'IBM Plex Sans',system-ui,sans-serif; --mono:'IBM Plex Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6}
a{color:var(--accent)} a:hover{color:var(--accent-dark)}
.wrap{max-width:1440px;margin:0 auto;padding:0 var(--pad)}
.mono{font-family:var(--mono)}
.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}

/* Header */
.site-header{border-bottom:1px solid var(--line)}
.site-header .wrap{height:84px;display:flex;align-items:center;gap:32px}
.logo{text-decoration:none;color:var(--ink);font-size:26px;font-weight:600;letter-spacing:-.02em}
.logo span{color:var(--accent)}
.site-header nav{display:flex;gap:28px;margin-left:auto;font-size:15px}
.site-header nav a{color:var(--ink);text-decoration:none}
.site-header nav a:hover{color:var(--accent)}

/* Buttons */
.btn{display:inline-flex;align-items:center;height:52px;padding:0 24px;border-radius:4px;text-decoration:none;font-size:16px;font-weight:500;border:1px solid var(--ink);color:var(--ink)}
.btn:hover{color:var(--ink);background:var(--paper)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff}

/* Hero */
.hero .wrap{padding-top:96px;padding-bottom:112px;display:flex;gap:64px;align-items:center}
.hero-text{flex:1;display:flex;flex-direction:column;gap:28px;max-width:640px}
.hero h1{margin:0;font-size:64px;line-height:1.05;font-weight:600;letter-spacing:-.025em}
.hero p{margin:0;font-size:20px;line-height:1.55;color:var(--ink-2)}
.actions{display:flex;flex-wrap:wrap;gap:12px;padding-top:8px}

.ptable{margin:0;display:flex;flex-direction:column;gap:16px}
.ptable .grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:560px;max-width:100%}
.el{aspect-ratio:1/1.1;padding:12px 14px;background:var(--paper);border:1px solid var(--ink);display:flex;flex-direction:column}
.el .z{font-family:var(--mono);font-size:13px}
.el .sym{font-size:48px;font-weight:500;line-height:1.1;padding-top:6px}
.el .name{font-size:13px;padding-top:4px}
.el .mass{font-family:var(--mono);font-size:12px;color:var(--muted)}
.el.hl{background:var(--accent);border-color:var(--accent);color:#fff}
.el.hl .mass{color:#D6E1EC}
.ptable figcaption{font-family:var(--mono);font-size:12px;color:var(--muted)}

/* Services */
.services{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.services .wrap{padding-top:96px;padding-bottom:96px;display:flex;flex-direction:column;gap:48px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:48px}
.section-head h2,.contact h2{margin:0;font-size:40px;line-height:1.15;font-weight:600;letter-spacing:-.02em;max-width:720px}
.section-head p{margin:0;font-size:17px;color:var(--ink-2);max-width:480px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{padding:32px;border:1px solid var(--line);border-radius:4px;display:flex;flex-direction:column;gap:16px}
.card .num{font-family:var(--mono);font-size:13px;color:var(--accent)}
.card h3{margin:0;font-size:26px;font-weight:600}
.card p{margin:0;color:var(--ink-2)}
.card ul{margin:0;padding:0 0 0 18px;font-size:15px;line-height:1.8}

/* Contact */
.contact .wrap{padding-top:96px;padding-bottom:96px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:start}
.contact .lead{margin:16px 0 0;font-size:17px;color:var(--ink-2);max-width:520px}
.contact-list{display:flex;flex-direction:column;gap:24px}
.contact-item{padding:28px 32px;background:var(--paper);border:1px solid var(--line);border-radius:4px;display:flex;flex-direction:column;gap:6px}
.contact-item .label{font-family:var(--mono);font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.contact-item a{font-size:26px;font-weight:500;text-decoration:none;color:var(--ink);overflow-wrap:anywhere}
.contact-item a:hover{color:var(--accent)}

/* Legal pages */
.legal .wrap{padding-top:72px;padding-bottom:96px;max-width:880px;margin:0}
.legal h1{margin:0 0 8px;font-size:48px;line-height:1.1;font-weight:600;letter-spacing:-.02em}
.legal h2{margin:48px 0 8px;font-size:24px;font-weight:600}
.legal h3{margin:28px 0 4px;font-size:18px;font-weight:600}
.legal p,.legal ul{margin:0 0 12px;color:var(--ink-2)}
.legal .note{font-family:var(--mono);font-size:13px;color:var(--muted)}

/* Footer */
.site-footer{background:var(--dark);color:var(--dark-muted);font-size:14px;line-height:1.8}
.site-footer .wrap{padding-top:64px;padding-bottom:64px;display:flex;flex-wrap:wrap;gap:48px 80px}
.site-footer .brand{display:flex;flex-direction:column;gap:12px;width:360px;max-width:100%}
.site-footer .brand .logo{color:var(--dark-ink);font-size:24px}
.site-footer .brand .logo span{color:var(--dark-accent)}
.site-footer .col{display:flex;flex-direction:column}
.site-footer strong{color:var(--dark-ink);font-weight:500}
.site-footer a{color:var(--dark-muted)} .site-footer a:hover{color:var(--dark-ink)}
.site-footer .legal-links{margin-left:auto;align-items:flex-end}

/* Smaller screens */
@media (max-width:1100px){
  :root{--pad:40px}
  .hero .wrap{flex-direction:column;align-items:flex-start;padding-top:64px;padding-bottom:80px}
  .cards{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
  .contact .wrap{grid-template-columns:1fr;gap:40px}
}
@media (max-width:640px){
  :root{--pad:16px}
  .site-header .wrap{height:68px}
  .site-header nav{gap:18px;font-size:14px}
  .logo{font-size:22px}
  .hero h1{font-size:40px}
  .hero p{font-size:18px}
  .el{padding:8px}
  .el .sym{font-size:28px}
  .el .name,.el .mass{font-size:10px}
  .section-head h2,.contact h2{font-size:30px}
  .services .wrap,.contact .wrap{padding-top:64px;padding-bottom:64px}
  .card{padding:24px}
  .contact-item{padding:20px}
  .contact-item a{font-size:20px}
  .legal h1{font-size:36px}
  .site-footer .legal-links{margin-left:0;align-items:flex-start}
}

/* Two services, four material classes (Design_C) */
.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.materials{background:var(--dark);color:var(--dark-ink)}
.materials .wrap{padding-top:96px;padding-bottom:96px;display:flex;flex-direction:column;gap:48px}
.materials .eyebrow{color:var(--dark-accent)}
.materials .section-head p{color:var(--dark-muted)}
.mat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:#3A3F46;border:1px solid #3A3F46}
.mat{padding:32px 28px;background:var(--dark);display:flex;flex-direction:column;gap:14px}
.mat .num{font-family:var(--mono);font-size:13px;color:#A7ABB1}
.mat h3{margin:0;font-size:22px;font-weight:500}
.mat ul{margin:0;padding:0 0 0 18px;font-size:14px;line-height:1.8;color:var(--dark-muted)}
@media (max-width:1100px){
  .cards-2{grid-template-columns:1fr}
  .mat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .materials .wrap{padding-top:64px;padding-bottom:64px}
  .mat-grid{grid-template-columns:1fr}
}

/* Contact person (Design_C) */
.person{margin-top:32px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:4px;max-width:520px}
.person-name{font-size:22px;font-weight:600}
.person-role{font-family:var(--mono);font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}

/* Logo as image (Logo/final, variant B3) */
.logo img{display:block;height:34px;width:auto}
.site-footer .brand .logo img{height:30px}
@media (max-width:640px){.logo img{height:28px}}

/* Header: larger logo on a light grey band */
.site-header{background:#E8E7E3;border-bottom-color:#D3D0C8}
.site-header .wrap{height:100px}
.site-header .logo img{height:46px}
@media (max-width:640px){
  .site-header .wrap{height:76px}
  .site-header .logo img{height:34px}
}

/* Watermark behind the periodic table (Design_D): market collage, see ../Wasserzeichen/LIESMICH.txt */
.hero{overflow:hidden}
.ptable{position:relative;isolation:isolate}
.ptable::before{
  content:"";position:absolute;z-index:-1;pointer-events:none;
  inset:-30% -45% -25% -45%;
  background:url(img/wasserzeichen-maerkte.webp) center/contain no-repeat;
  opacity:.16;
}
/* Fix (Design_D): periodic table shrinks to screen width on phones instead of being cut off */
.ptable{width:100%;max-width:560px;min-width:0}

/* Five value-chain stages incl. finished products (Design_E) */
.mat-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
@media (max-width:1100px){
  .mat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .mat:last-child{grid-column:1/-1}
}
@media (max-width:640px){
  .mat-grid{grid-template-columns:1fr}
}

/* Blue accents (Design_F): key phrase of each headline, service titles, contact person */
.hl-text{color:var(--accent)}
.materials .hl-text,.site-footer .hl-text{color:var(--dark-accent)}
.card h3{color:var(--accent)}
.person-name{color:var(--accent)}
.contact-item a{color:var(--accent)}
.contact-item a:hover{color:var(--accent-dark)}

/* Phone icons (landline / mobile) (Design_G) */
.ico{width:1.15em;height:1.15em;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.2em;margin-right:.45em}
.contact-item .label{display:flex;align-items:center}
.contact-item .label .ico{width:18px;height:18px}
.site-footer .col a .ico{width:15px;height:15px}

/* Narrow phones: logo and menu must fit in one line (Design_K) */
@media (max-width:400px){
  .site-header .wrap{gap:16px}
  .site-header .logo img{height:28px}
  .site-header nav{gap:14px;font-size:13px}
}
@media (max-width:340px){
  .site-header .wrap{gap:12px}
  .site-header .logo img{height:24px}
  .site-header nav{gap:10px;font-size:12.5px}
}