/* pörtner consulting – Open-Xchange Website */
:root {
  --clr-primary: #1766a6;
  --clr-primary-dark: #0b3d6d;
  --clr-primary-light: #eaf3fb;
  --clr-accent: #1677be;
  --clr-accent-hover: #0d5d9c;
  --clr-cta: #d46524;
  --clr-cta-hover: #ad4e17;
  --clr-text: #183247;
  --clr-text-muted: #5a6b78;
  --clr-bg: #ffffff;
  --clr-bg-soft: #f3f8fc;
  --clr-border: #d6e3ed;
  --clr-white: #ffffff;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-w: 1180px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 5px rgba(11, 61, 109, .08);
  --shadow-md: 0 9px 24px rgba(11, 61, 109, .12);
  --shadow-lg: 0 18px 42px rgba(11, 61, 109, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--clr-text); background: var(--clr-bg); font-family: var(--font-sans); font-size: 16px; line-height: 1.65; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--clr-accent); text-decoration: none; }
a:hover { color: var(--clr-accent-hover); text-decoration: underline; }
p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1rem; padding-left: 1.35rem; }
li { margin-bottom: .45rem; }
h1, h2, h3, h4 { margin: 0; color: var(--clr-primary-dark); line-height: 1.2; }
h1 { font-size: clamp(2rem, 4.6vw, 3.35rem); letter-spacing: -.035em; }
h2 { font-size: clamp(1.45rem, 3vw, 2.15rem); letter-spacing: -.02em; }
h3 { font-size: 1.2rem; }
address { font-style: normal; }

.container { width: min(100% - 2.5rem, var(--max-w)); margin-inline: auto; }
.section { padding: 5rem 0; }
.section--soft { background: var(--clr-bg-soft); }
.section--dark { background: var(--clr-primary-dark); color: var(--clr-white); }
.section--dark h2, .section--dark h3 { color: var(--clr-white); }
.section--dark p { color: #d1e5e3; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.75rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; }
.text-center { text-align: center; }
.mt-md { margin-top: 2rem; }
.mt-lg { margin-top: 3rem; }

.skip-link { position: fixed; top: -100%; left: 1rem; z-index: 999; background: var(--clr-primary-dark); color: #fff; padding: .65rem .9rem; border-radius: 0 0 var(--radius) var(--radius); font-weight: 700; }
.skip-link:focus { top: 0; color: #fff; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 47px; padding: .72rem 1.3rem; border: 2px solid transparent; border-radius: var(--radius); font-size: .95rem; font-weight: 700; line-height: 1.2; text-decoration: none; cursor: pointer; transition: background .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary { background: var(--clr-cta); color: #fff; border-color: var(--clr-cta); }
.btn--primary:hover { background: var(--clr-cta-hover); border-color: var(--clr-cta-hover); color: #fff; box-shadow: var(--shadow-md); }
.btn--secondary { color: var(--clr-primary-dark); background: #fff; border-color: var(--clr-border); }
.btn--secondary:hover { color: var(--clr-primary-dark); border-color: var(--clr-accent); background: var(--clr-primary-light); }
.btn--outline { color: #fff; border-color: rgba(255,255,255,.75); background: transparent; }
.btn--outline:hover { color: #fff; background: rgba(255,255,255,.14); }
.btn--light { color: var(--clr-primary-dark); border-color: #fff; background: #fff; }
.btn--light:hover { color: var(--clr-primary-dark); background: #e5f0ef; }
.btn-group { display: flex; flex-wrap: wrap; gap: .8rem; }

.site-header { position: sticky; z-index: 100; top: 0; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--clr-border); box-shadow: 0 2px 10px rgba(7,54,61,.05); backdrop-filter: blur(8px); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 76px; }
.site-logo { display: flex; flex-direction: column; flex: 0 0 auto; line-height: 1.08; color: var(--clr-primary-dark); text-decoration: none; }
.site-logo:hover { color: var(--clr-primary-dark); text-decoration: none; }
.site-logo__name { font-size: 1.25rem; font-weight: 800; letter-spacing: -.03em; }
.site-logo__tagline { margin-top: .22rem; color: var(--clr-text-muted); font-size: .64rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.main-nav__list { display: flex; align-items: center; gap: .15rem; margin: 0; padding: 0; list-style: none; }
.main-nav__item { position: relative; margin: 0; }
.main-nav__link { display: block; padding: .5rem .73rem; color: var(--clr-text); border-radius: 6px; font-size: .9rem; font-weight: 650; white-space: nowrap; }
.main-nav__link:hover { color: var(--clr-primary-dark); background: var(--clr-bg-soft); text-decoration: none; }
.main-nav__item--has-dropdown > .main-nav__link::after { content: "▾"; margin-left: .28rem; color: var(--clr-text-muted); font-size: .7rem; }
.dropdown { display: none; position: absolute; top: calc(100% + 8px); left: 0; width: max-content; min-width: 238px; max-width: 310px; margin: 0; padding: .5rem; border: 1px solid var(--clr-border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-lg); list-style: none; }
.dropdown li { margin: 0; }
.dropdown a { display: block; padding: .45rem .6rem; color: var(--clr-text); border-radius: 5px; font-size: .875rem; }
.dropdown a:hover { background: var(--clr-bg-soft); color: var(--clr-primary-dark); text-decoration: none; }
.main-nav__item--has-dropdown:hover .dropdown, .main-nav__item--has-dropdown:focus-within .dropdown { display: block; }
.nav-cta { margin-left: .45rem; background: var(--clr-cta); color: #fff; }
.nav-cta:hover { color: #fff; background: var(--clr-cta-hover); }
.menu-toggle { display: none; border: 1px solid var(--clr-border); border-radius: 6px; background: #fff; color: var(--clr-primary-dark); padding: .4rem .62rem; font-size: 1.25rem; line-height: 1; cursor: pointer; }

.hero { position: relative; min-height: 540px; display: flex; align-items: center; overflow: hidden; background: var(--clr-primary-dark); color: #fff; }
.hero--image { background-image: linear-gradient(90deg, rgba(11,61,109,.98) 0%, rgba(11,61,109,.94) 32%, rgba(11,61,109,.45) 59%, rgba(11,61,109,.12) 100%), url('/assets/images/openxchange-groupware-team.jpg'); background-position: center; background-size: cover; }
.hero__content { position: relative; z-index: 1; max-width: 680px; padding: 5.5rem 0; }
.hero h1 { max-width: 660px; color: #fff; }
.hero__lead { max-width: 610px; margin: 1.25rem 0 2rem; color: #d5e8e6; font-size: clamp(1.05rem, 2vw, 1.22rem); }
.hero__badges { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 2rem; }
.hero__badge { border: 1px solid rgba(255,255,255,.28); border-radius: 999px; padding: .26rem .7rem; color: #e5f2f0; background: rgba(255,255,255,.08); font-size: .8rem; font-weight: 650; }
.eyebrow { display: inline-block; margin-bottom: .8rem; color: var(--clr-accent); font-size: .78rem; font-weight: 800; letter-spacing: .095em; text-transform: uppercase; }
.hero .eyebrow { color: #a6dad5; }

.intro { max-width: 800px; }
.intro h2 { margin-bottom: 1rem; }
.section-heading { max-width: 760px; margin-bottom: 2.25rem; }
.section-heading h2 { margin-bottom: .8rem; }
.section-heading p { color: var(--clr-text-muted); }
.card { display: flex; flex-direction: column; padding: 1.55rem; border: 1px solid var(--clr-border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.card:hover { box-shadow: var(--shadow-md); }
.card__icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 1rem; border-radius: 12px; background: var(--clr-primary-light); color: var(--clr-primary); font-size: 1.35rem; }
.card h3 { margin-bottom: .65rem; }
.card p { flex: 1; color: var(--clr-text-muted); font-size: .94rem; }
.card__link { align-self: flex-start; margin-top: .6rem; color: var(--clr-accent); font-size: .9rem; font-weight: 750; }
.card__link::after { content: " →"; }
.card__link:hover { text-decoration: none; }

.feature-panel { display: grid; grid-template-columns: .95fr 1.05fr; overflow: hidden; border: 1px solid var(--clr-border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.feature-panel__image { height: 100%; min-height: 310px; object-fit: cover; }
.feature-panel__body { padding: 2.4rem; }
.feature-panel__body h2 { margin-bottom: 1rem; }
.feature-panel__body p { color: var(--clr-text-muted); }
.check-list { padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.55rem; color: var(--clr-text-muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--clr-accent); font-weight: 900; }
.highlight-box { margin-top: 1.8rem; padding: 1rem 1.2rem; border-left: 4px solid var(--clr-accent); border-radius: 0 var(--radius) var(--radius) 0; background: var(--clr-primary-light); color: var(--clr-primary-dark); }

.steps { display: grid; gap: 1rem; counter-reset: steps; }
.step { display: grid; grid-template-columns: 48px 1fr; gap: 1rem; align-items: start; padding: 1.15rem 1.35rem; border: 1px solid var(--clr-border); border-radius: var(--radius); background: #fff; }
.step__num { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--clr-primary); color: #fff; font-weight: 800; }
.step__num::before { counter-increment: steps; content: counter(steps); }
.step h3 { margin: .1rem 0 .35rem; font-size: 1.05rem; }
.step p { margin: 0; color: var(--clr-text-muted); font-size: .94rem; }

.page-hero { padding: 4.4rem 0; background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary)); color: #fff; }
.page-hero__inner { max-width: 900px; }
.page-hero h1 { max-width: 820px; color: #fff; }
.page-hero p { max-width: 760px; margin: 1rem 0 1.6rem; color: #dceceb; font-size: 1.08rem; }
.page-hero .eyebrow { color: #aae0db; }
.breadcrumbs { display: flex; align-items: center; gap: .45rem; padding: .85rem 0; border-bottom: 1px solid var(--clr-border); color: var(--clr-text-muted); font-size: .84rem; }
.breadcrumbs a { color: var(--clr-text-muted); }
.breadcrumbs a:hover { color: var(--clr-primary); }

.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; align-items: start; gap: 4rem; }
.content-article { max-width: 760px; }
.content-section { margin-bottom: 2.7rem; }
.content-section h2 { margin-bottom: .8rem; }
.content-section p { color: var(--clr-text-muted); }
.content-aside { position: sticky; top: 98px; display: grid; gap: 1rem; }
.aside-card { padding: 1.35rem; border: 1px solid var(--clr-border); border-radius: var(--radius-lg); background: var(--clr-bg-soft); }
.aside-card h2 { margin-bottom: .65rem; font-size: 1.2rem; }
.aside-card p { color: var(--clr-text-muted); font-size: .91rem; }
.aside-card .btn { width: 100%; margin-top: .3rem; }
.aside-card--links { background: #fff; }
.aside-card--links ul { margin: .4rem 0 0; padding: 0; list-style: none; }
.aside-card--links li { margin: 0; border-bottom: 1px solid var(--clr-border); }
.aside-card--links li:last-child { border-bottom: 0; }
.aside-card--links a { display: block; padding: .55rem 0; font-size: .89rem; font-weight: 650; }

.reference-card { overflow: hidden; padding: 0; }
.reference-card__image { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.reference-card__body { padding: 1.55rem; }
.reference-card__body h2 { margin: .75rem 0; font-size: 1.35rem; }
.reference-card__body p { color: var(--clr-text-muted); }
.tag { display: inline-flex; align-items: center; padding: .22rem .63rem; border: 1px solid #b4dfda; border-radius: 999px; background: #e8f7f5; color: var(--clr-primary); font-size: .76rem; font-weight: 750; }

.comparison { overflow-x: auto; border: 1px solid var(--clr-border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: .85rem 1rem; border-bottom: 1px solid var(--clr-border); text-align: left; vertical-align: top; }
th { background: var(--clr-primary-light); color: var(--clr-primary-dark); font-size: .9rem; }
td { color: var(--clr-text-muted); font-size: .92rem; }
tr:last-child td { border-bottom: 0; }

.faq { max-width: 880px; }
.faq__item { border-bottom: 1px solid var(--clr-border); }
.faq__question { width: 100%; display: flex; justify-content: space-between; gap: 1rem; padding: 1.15rem 0; border: 0; background: transparent; color: var(--clr-primary-dark); text-align: left; font: inherit; font-weight: 750; cursor: pointer; }
.faq__question::after { content: "+"; color: var(--clr-accent); font-size: 1.2rem; }
.faq__item.is-open .faq__question::after { content: "–"; }
.faq__answer { display: none; max-width: 800px; padding-bottom: 1rem; color: var(--clr-text-muted); }
.faq__item.is-open .faq__answer { display: block; }

.contact-intro { max-width: 880px; }
.form-wrap { max-width: 920px; padding: 2rem; border: 1px solid var(--clr-border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.form-alert { margin-bottom: 1.5rem; padding: 1rem 1.15rem; border: 1px solid #e0a0a0; border-radius: var(--radius); background: #fff1f1; color: #6d2323; }
.form-alert ul { margin: .4rem 0 0; }
.form-section-title { margin-bottom: .45rem; font-size: 1.32rem; }
.form-section-note { color: var(--clr-text-muted); font-size: .75em; font-weight: 500; }
.form-hint, .field-hint, .required-note { color: var(--clr-text-muted); font-size: .86rem; }
.form-hint { margin-bottom: 1.25rem; }
.field-hint { margin: .35rem 0 0; }
.required-note { margin: 0 0 1.2rem; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.form-group { margin-bottom: 1.15rem; }
.form-group label { display: block; margin-bottom: .38rem; color: var(--clr-text); font-size: .89rem; font-weight: 700; }
.form-group input, .form-group textarea { width: 100%; padding: .7rem .8rem; border: 1px solid #b8cfcc; border-radius: 6px; color: var(--clr-text); background: #fff; font: inherit; line-height: 1.4; }
.form-group textarea { min-height: 150px; resize: vertical; }
.form-group input:focus, .form-group textarea:focus { outline: 3px solid rgba(8,123,134,.18); border-color: var(--clr-accent); }
.choice-group { margin: 0 0 1.25rem; padding: 1rem 1.1rem 1.1rem; border: 1px solid var(--clr-border); border-radius: var(--radius); }
.choice-group legend { padding: 0 .3rem; color: var(--clr-text); font-size: .91rem; font-weight: 800; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .58rem .75rem; }
.choice-grid--single { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.choice-option { display: flex; align-items: flex-start; gap: .52rem; padding: .58rem .65rem; border: 1px solid var(--clr-border); border-radius: 6px; color: var(--clr-text); font-size: .88rem; line-height: 1.36; cursor: pointer; }
.choice-option:hover { border-color: var(--clr-accent); background: var(--clr-bg-soft); }
.choice-option:focus-within { outline: 3px solid rgba(8,123,134,.17); border-color: var(--clr-accent); }
.choice-option input { margin-top: .18rem; accent-color: var(--clr-accent); }
.checkbox-group { display: flex; gap: .65rem; align-items: flex-start; }
.checkbox-group input { width: auto; margin-top: .28rem; accent-color: var(--clr-accent); }
.checkbox-group label { font-weight: 500; }
.form-privacy-note { margin: -.7rem 0 1.25rem 1.9rem; }
.form-submit { width: 100%; }
.honeypot { display: none; }
.contact-direct { margin-top: 1.7rem; color: var(--clr-text-muted); font-size: .93rem; }
.contact-direct p { margin-bottom: .3rem; }

.cta-banner { padding: 4.2rem 0; background: linear-gradient(120deg, var(--clr-primary-dark), var(--clr-primary)); color: #fff; text-align: center; }
.cta-banner h2 { color: #fff; }
.cta-banner p { max-width: 680px; margin: .85rem auto 1.7rem; color: #d5e8e6; }

.site-footer { padding: 3.5rem 0 0; background: #062e34; color: #bdd4d1; }
.footer-grid { display: grid; grid-template-columns: 1.05fr 1.2fr 1.25fr 1.35fr; gap: 2rem; padding-bottom: 2.5rem; }
.footer-col h2 { margin-bottom: .8rem; color: #fff; font-size: .88rem; letter-spacing: .075em; text-transform: uppercase; }
.footer-col ul { margin: 0; padding: 0; list-style: none; }
.footer-col li { margin-bottom: .38rem; font-size: .88rem; }
.footer-col a { color: #bdd4d1; }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-col address { font-size: .88rem; line-height: 1.75; }
.footer-contact-link { display: inline-block; margin-top: .8rem; color: #fff !important; font-size: .9rem; font-weight: 750; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding: 1.15rem 0; border-top: 1px solid rgba(255,255,255,.12); color: #8ab0ac; font-size: .8rem; }
.footer-bottom a { color: #bdd4d1; }
#back-to-top { position: fixed; right: 1.3rem; bottom: 1.3rem; z-index: 50; display: grid; place-items: center; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--clr-primary); color: #fff; box-shadow: var(--shadow-md); font-size: 1.25rem; cursor: pointer; }

@media (max-width: 1050px) { .main-nav__link { padding: .5rem .5rem; } .site-logo__tagline { display: none; } .content-layout { gap: 2.2rem; } }
@media (max-width: 840px) {
  .menu-toggle { display: block; }
  .main-nav { display: none; position: absolute; top: 76px; right: 0; left: 0; padding: .85rem 1.25rem 1.1rem; border-bottom: 1px solid var(--clr-border); background: #fff; box-shadow: var(--shadow-md); }
  .main-nav.is-open { display: block; }
  .main-nav__list { display: block; }
  .main-nav__link { padding: .68rem .2rem; }
  .nav-cta { display: inline-block; margin: .55rem 0 0; padding: .62rem .85rem; }
  .dropdown { position: static; width: auto; max-width: none; margin: 0 0 .4rem .7rem; padding: .25rem .7rem; border: 0; border-left: 2px solid var(--clr-border); border-radius: 0; box-shadow: none; }
  .main-nav__item--has-dropdown:hover .dropdown { display: none; }
  .main-nav__item--has-dropdown.is-open .dropdown { display: block; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-layout { grid-template-columns: 1fr; }
  .content-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { min-height: 480px; }
}
@media (max-width: 680px) {
  .container { width: min(100% - 2rem, var(--max-w)); }
  .section { padding: 3.5rem 0; }
  .grid-2, .grid-3, .grid-4, .feature-panel, .form-row, .choice-grid, .choice-grid--single, .content-aside, .footer-grid { grid-template-columns: 1fr; }
  .hero--image { background-image: linear-gradient(180deg, rgba(11,61,109,.94), rgba(11,61,109,.83)), url('/assets/images/openxchange-groupware-team.jpg'); background-position: 65% center; }
  .hero__content { padding: 4.4rem 0; text-align: center; }
  .hero__badges, .btn-group { justify-content: center; }
  .feature-panel__image { min-height: 230px; }
  .feature-panel__body { padding: 1.7rem; }
  .form-wrap { padding: 1.25rem; }
  .footer-bottom { flex-direction: column; }
  .content-aside { display: grid; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; } }