/* ==========================================================================
   IO9 GmbH — io9.de
   Designrichtung "Blueprint": Papierweiß, Konstruktionsraster, Ultramarin.
   ========================================================================== */

:root {
  --paper:      #eeece6;
  --paper-2:    #f7f5f0;
  --paper-3:    #e4e1d8;
  --ink:        #14161a;
  --ink-soft:   #4b4f56;
  --ink-dim:    #7d818a;
  --rule:       #d3cfc4;
  --accent:     #1a3ee8;
  --accent-ink: #ffffff;

  --line:   1.5px solid var(--ink);
  --hair:   1px solid var(--rule);
  --grid:   38px;
  --maxw:   1240px;
  --pad:    clamp(20px, 5vw, 56px);

  --ease:   cubic-bezier(.2, .7, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.6 "Chivo", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  /* clip statt hidden: hidden würde den sticky Header aushebeln */
  overflow-x: clip;
}

/* Konstruktionsraster über der ganzen Seite */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(26, 62, 232, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 62, 232, .07) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
}

body > * { position: relative; z-index: 1; }

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  z-index: 100;
  font: 600 13px/1 "Chivo Mono", monospace;
}
.skip:focus { left: 8px; top: 8px; }

/* ==========================================================================
   Typografie-Bausteine
   ========================================================================== */

.mono {
  font-family: "Chivo Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 20px;
}
.eyebrow::after {
  content: "";
  height: 1.5px;
  width: clamp(40px, 8vw, 90px);
  background: var(--accent);
}

h1, h2, h3 { font-weight: 900; letter-spacing: -.045em; line-height: 1.02; margin: 0; }

h1 { font-size: clamp(38px, 6.4vw, 76px); }
h2 { font-size: clamp(28px, 4vw, 46px); }
h3 { font-size: clamp(18px, 2vw, 22px); letter-spacing: -.03em; line-height: 1.2; }

.outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  text-stroke: 1.5px var(--ink);
}

.lede {
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.65;
  color: var(--ink-soft);
  font-weight: 300;
  max-width: 52ch;
}

/* ==========================================================================
   Kopfzeile
   ========================================================================== */

.topbar {
  background: var(--ink);
  color: var(--paper);
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 9px;
}
.topbar a { text-decoration: none; opacity: .75; transition: opacity .2s; }
.topbar a:hover { opacity: 1; }

.head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: var(--line);
}
.head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 14px;
}

/* Wortmarke — kein Logo vorhanden, typografisch gesetzt.
   Austausch später: .brand-mark durch <img src="assets/logo.svg"> ersetzen. */
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; }
.brand-mark {
  font-weight: 900;
  font-size: 27px;
  letter-spacing: -.045em;
  line-height: 1;
}
.brand-mark b { color: var(--accent); font-weight: 900; }
.brand-cross {
  width: 11px; height: 11px;
  flex: none;
  position: relative;
  opacity: .75;
}
.brand-cross::before, .brand-cross::after {
  content: "";
  position: absolute;
  background: var(--accent);
}
.brand-cross::before { left: 5px; top: 0; width: 1.5px; height: 11px; }
.brand-cross::after  { top: 5px; left: 0; height: 1.5px; width: 11px; }

.nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 30px); }
.nav a {
  text-decoration: none;
  font-family: "Chivo Mono", monospace;
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 600;
  position: relative;
  padding-block: 4px;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width .28s var(--ease);
}
.nav a:hover::after, .nav a:focus-visible::after { width: 100%; }

.lang {
  display: flex;
  border: var(--line);
  font-family: "Chivo Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  overflow: hidden;
}
.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  padding: 6px 10px;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.lang button + button { border-left: var(--line); }
.lang button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }

.burger {
  display: none;
  appearance: none;
  border: var(--line);
  background: transparent;
  width: 40px; height: 36px;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.burger span {
  position: absolute;
  left: 9px; right: 9px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .3s var(--ease), opacity .2s;
}
.burger span:nth-child(1) { top: 12px; }
.burger span:nth-child(2) { top: 17px; }
.burger span:nth-child(3) { top: 22px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero { padding-block: clamp(52px, 9vw, 116px) clamp(40px, 6vw, 76px); }
.hero h1 { margin-bottom: 28px; max-width: 20ch; }
.hero h1 span { display: block; }

/* Datentabelle */
.spec {
  border: var(--line);
  background: var(--paper-2);
}
.spec-h {
  border-bottom: var(--line);
  padding: 10px 16px;
  font-weight: 600;
}
.spec-r {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 11px 16px;
  border-bottom: var(--hair);
  font-family: "Chivo Mono", monospace;
  font-size: 12px;
}
.spec-r:last-child { border-bottom: 0; }
.spec-r dt { color: var(--ink-dim); }
.spec-r dd { margin: 0; font-weight: 600; text-align: right; }

/* ==========================================================================
   Wertschöpfungskette (Band)
   ========================================================================== */

.chain { border-top: var(--line); border-bottom: var(--line); background: var(--paper-2); }
.chain .wrap { padding-inline: 0; }
.chain-grid { display: grid; grid-template-columns: repeat(4, 1fr); }

.link-cell {
  padding: 26px clamp(18px, 2.4vw, 30px) 32px;
  border-right: var(--hair);
  position: relative;
  transition: background .3s var(--ease);
}
.link-cell:last-child { border-right: 0; }
.link-cell:hover { background: var(--paper); }
.link-cell::before {
  content: "";
  position: absolute;
  left: 0; top: -1.5px;
  width: 0; height: 3px;
  background: var(--accent);
  transition: width .4s var(--ease);
}
.link-cell:hover::before { width: 100%; }
.link-cell .num { color: var(--accent); font-weight: 600; display: block; margin-bottom: 14px; }
.link-cell h3 { margin-bottom: 9px; }
.link-cell p { margin: 0; font-size: 13.5px; line-height: 1.55; color: var(--ink-soft); font-weight: 300; }

/* ==========================================================================
   Abschnitte
   ========================================================================== */

section { scroll-margin-top: 76px; }

.sec { padding-block: clamp(52px, 8vw, 104px); }
.sec-head { max-width: 62ch; margin-bottom: clamp(30px, 4vw, 54px); }
.sec-head h2 { margin-bottom: 18px; }

/* Leistungen */
.services { display: grid; gap: 0; border-top: var(--line); }
.service {
  display: grid;
  grid-template-columns: 92px 1fr 1.15fr;
  gap: clamp(18px, 3vw, 44px);
  padding-block: clamp(26px, 3.4vw, 42px);
  border-bottom: var(--hair);
  align-items: start;
}
.service .idx {
  font-family: "Chivo Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--accent);
  padding-top: 6px;
}
.service h3 { font-size: clamp(20px, 2.6vw, 30px); letter-spacing: -.04em; }
.service p { margin: 0; color: var(--ink-soft); font-weight: 300; font-size: 14.5px; line-height: 1.7; }
.service ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.service li {
  font-family: "Chivo Mono", monospace;
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  border: var(--hair);
  padding: 5px 9px;
  color: var(--ink-dim);
}

/* Unternehmen */
.about { background: var(--ink); color: var(--paper); border-block: var(--line); }
.about h2 { color: var(--paper-2); }
.about .lede { color: #a8aab0; }
.about .eyebrow { color: #7d95ff; }
.about .eyebrow::after { background: #7d95ff; }
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr .95fr;
  gap: clamp(28px, 5vw, 66px);
  align-items: start;
}
.facts { border: 1.5px solid rgba(255, 255, 255, .22); background: transparent; }
.facts .spec-h { border-bottom: 1.5px solid rgba(255, 255, 255, .22); color: var(--paper); }
.facts .spec-r { border-bottom: 1px solid rgba(255, 255, 255, .12); }
.facts .spec-r dt { color: #85888f; }
.facts .spec-r dd { color: var(--paper-2); }

/* ==========================================================================
   Kontakt
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: .95fr 1.1fr;
  gap: clamp(30px, 5vw, 70px);
  align-items: start;
}

.contact-list { border-top: var(--line); }
.contact-item {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 16px;
  padding-block: 16px;
  border-bottom: var(--hair);
  align-items: baseline;
}
.contact-item dt { color: var(--ink-dim); font-family: "Chivo Mono", monospace; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.contact-item dd { margin: 0; font-size: 15px; }
.contact-item a { text-decoration: none; border-bottom: 1.5px solid var(--accent); padding-bottom: 1px; }
.contact-item a:hover { color: var(--accent); }

form { border: var(--line); background: var(--paper-2); padding: clamp(20px, 3vw, 32px); }
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-family: "Chivo Mono", monospace;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 7px;
}
.field input, .field textarea {
  width: 100%;
  border: var(--hair);
  border-bottom: var(--line);
  background: var(--paper);
  color: var(--ink);
  font: 400 15px/1.5 "Chivo", sans-serif;
  padding: 11px 13px;
  transition: border-color .2s, background .2s;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}
.field textarea { resize: vertical; min-height: 130px; }
.hp { position: absolute; left: -9999px; }

.btn {
  appearance: none;
  border: var(--line);
  background: var(--ink);
  color: var(--paper);
  font-family: "Chivo Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  padding: 14px 26px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: background .25s var(--ease), color .25s, transform .2s;
}
.btn:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.btn::after { content: "→"; transition: transform .25s var(--ease); }
.btn:hover::after { transform: translateX(4px); }

.form-note { margin: 14px 0 0; font-size: 12px; line-height: 1.55; color: var(--ink-dim); }
.form-note a { color: var(--accent); }

.form-msg {
  margin: 0 0 18px;
  padding: 12px 14px;
  border: 1.5px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  font-size: 14px;
}
.form-msg[hidden] { display: none; }

/* ==========================================================================
   Fußzeile
   ========================================================================== */

.foot { border-top: var(--line); background: var(--paper-2); }
.foot .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-block: 26px;
}
.foot-links { display: flex; gap: 22px; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--accent); }
.foot .mono { color: var(--ink-dim); }

/* ==========================================================================
   Rechtsseiten (Impressum / Datenschutz)
   ========================================================================== */

.legal { padding-block: clamp(40px, 6vw, 80px) clamp(50px, 8vw, 100px); }
.legal .wrap > * { max-width: 76ch; }
.legal h1 { margin-bottom: 34px; }
.legal h2 { font-size: clamp(20px, 2.4vw, 26px); margin: 42px 0 14px; }
.legal h3 { font-size: 17px; margin: 26px 0 10px; }
.legal p, .legal li { color: var(--ink-soft); font-weight: 300; font-size: 15px; line-height: 1.75; }
.legal p { margin: 0 0 14px; }
.legal ul { padding-left: 20px; margin: 0 0 14px; }
.legal li { margin-bottom: 6px; }
.legal a { color: var(--accent); }
.legal .back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: "Chivo Mono", monospace;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 30px;
}
.legal .back::before { content: "←"; }
.legal .back:hover { color: var(--accent); }
.legal .block {
  border: var(--line);
  background: var(--paper-2);
  padding: 22px 24px;
  margin-bottom: 20px;
}
.legal .block p:last-child { margin-bottom: 0; }

/* ==========================================================================
   Bewegung
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

.hero .eyebrow, .hero h1, .hero .lede {
  animation: rise .8s var(--ease) both;
}
.hero .eyebrow { animation-delay: .05s; }
.hero h1      { animation-delay: .13s; }
.hero .lede   { animation-delay: .24s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Umbrüche
   ========================================================================== */

@media (max-width: 980px) {
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .chain-grid { grid-template-columns: 1fr 1fr; }
  .link-cell:nth-child(-n+2) { border-bottom: var(--hair); }
  .link-cell:nth-child(2n) { border-right: 0; }
  .service { grid-template-columns: 60px 1fr; }
  .service > *:last-child { grid-column: 2; }
}

@media (max-width: 700px) {
  .topbar .wrap { flex-direction: column; gap: 3px; align-items: flex-start; }

  .burger { display: block; }

  .nav {
    position: fixed;
    inset: 0 0 auto;
    top: 61px;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: var(--line);
    padding: 8px var(--pad) 22px;
    transform: translateY(-120%);
    transition: transform .38s var(--ease);
    box-shadow: 0 20px 40px -30px rgba(0, 0, 0, .5);
  }
  .nav[data-open="true"] { transform: none; }
  .nav a { width: 100%; padding-block: 15px; border-bottom: var(--hair); font-size: 13px; }
  .nav .lang { margin-top: 16px; }

  .chain-grid { grid-template-columns: 1fr; }
  .link-cell { border-right: 0; border-bottom: var(--hair); }
  .link-cell:last-child { border-bottom: 0; }
  .link-cell:nth-child(-n+2) { border-bottom: var(--hair); }

  .service { grid-template-columns: 1fr; gap: 12px; }
  .service > *:last-child { grid-column: 1; }
  .service .idx { padding-top: 0; }

  .contact-item { grid-template-columns: 1fr; gap: 4px; }
  .foot .wrap { flex-direction: column; align-items: flex-start; }
}