/* Zero Engineering AG — gemeinsames Stylesheet */

:root {
  --bg: #0B0C10;
  --surface: #111319;
  --line: #22252C;
  --fg: #E7E6E2;
  --muted: #6E7180;
  --accent: #9AA3C7;

  --font-display: "Fraunces", serif;
  --font-body: "Work Sans", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --content-width: 46rem;
  --gutter: 1.5rem;
}

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

html {
  background: var(--bg);
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--fg);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  line-height: 1.25;
  margin: 0 0 1rem;
  color: var(--fg);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
}

h3 {
  font-size: 1.25rem;
  font-style: normal;
}

p {
  margin: 0 0 1.25rem;
  color: var(--fg);
}

p.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 38rem;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

/* Layout */

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

main {
  display: block;
}

section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--line);
}

section:last-of-type {
  border-bottom: none;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  max-width: 64rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  flex-wrap: wrap;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--fg);
}

.wordmark:hover {
  color: var(--fg);
}

.signet {
  width: 28px;
  height: auto;
  flex-shrink: 0;
}

.signet-small {
  width: 22px;
}

nav.site-nav ul {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
}

nav.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
}

nav.site-nav a:hover,
nav.site-nav a[aria-current="page"] {
  color: var(--accent);
}

/* Hero */

.hero {
  padding: 6rem 0 5rem;
}

.hero .wrap {
  max-width: 64rem;
}

.hero h1 {
  max-width: 34rem;
}

/* Index links list */

.section-links ul,
.services-list ul,
.form-note {
  border-top: 1px solid var(--line);
}

.section-links li,
.services-list li {
  border-bottom: 1px solid var(--line);
  padding: 2rem 0;
}

.section-links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.section-links a .link-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--fg);
}

.section-links a .link-arrow {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.section-links a:hover .link-title,
.section-links a:hover .link-arrow {
  color: var(--accent);
}

.section-links p {
  color: var(--muted);
  margin-top: 0.5rem;
  max-width: 32rem;
}

/* Services list (Leistungen) */

.services-list h3 {
  margin-bottom: 0.75rem;
}

.services-list .service-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.75rem;
}

.services-list p {
  color: var(--muted);
  max-width: 36rem;
}

/* Buttons */

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--accent);
  padding: 0.85rem 1.6rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  color: var(--accent);
  border-color: var(--fg);
}

/* Forms */

.contact-form {
  border-top: 1px solid var(--line);
  padding-top: 2.5rem;
}

.field {
  margin-bottom: 1.75rem;
}

.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.field input,
.field textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  padding: 0.85rem 1rem;
  line-height: 1.6;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.field textarea {
  resize: vertical;
  min-height: 9rem;
}

.contact-direct {
  color: var(--muted);
}

.contact-direct a {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

/* Philosophy / narrative text (Über uns) */

.prose p {
  max-width: 40rem;
}

.prose .pull {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--fg);
  max-width: 34rem;
  margin: 2.5rem 0;
  line-height: 1.5;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 3rem 0;
}

.site-footer .wrap {
  max-width: 64rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-mark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-meta a {
  color: var(--muted);
}

.footer-meta a:hover {
  color: var(--accent);
}

/* Fade-in on scroll */

.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive */

@media (max-width: 640px) {
  section {
    padding: 3.5rem 0;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .site-header .wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  nav.site-nav ul {
    gap: 1.25rem;
  }

  .section-links a {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .site-footer .wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}