/* ===== Tokens ===== */
:root {
  --c-blue: #3858E9;
  --c-blue-deep: #183AD6;
  --c-cyan: #00B2E6;
  --c-black: #000000;
  --c-charcoal: #282828;
  --c-gray-dark: #555555;
  --c-gray: #666666;
  --c-gray-light: #DDDDDD;
  --c-off-white: #F1F1F1;
  --c-cream: #ECEBE5;
  --c-white: #FFFFFF;
  --c-error: #CC1818;

  --f-display: 'Inter', Georgia, serif;
  --f-body: 'Inter', Georgia, serif;
  --f-ui: 'Poppins', 'Helvetica Neue', sans-serif;

  --max-w: 1200px;
  --max-w-prose: 760px;
  --pad-x: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--f-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-black);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1 0 auto; }
.footer { flex-shrink: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.3s ease; }

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 300;
  margin: 0;
  letter-spacing: -0.01em;
}
h1 { font-size: 60px; line-height: 1.05; }
h2 { font-size: 40px; line-height: 1.15; }
h3 { font-size: 26px; line-height: 1.25; font-weight: 400; }
h4 { font-size: 18px; line-height: 1.35; font-weight: 500; }
em { font-style: italic; font-weight: 300; color: var(--c-gray); }
p { margin: 0 0 16px; color: var(--c-charcoal); }
strong { font-weight: 500; color: var(--c-black); }

.eyebrow {
  font-family: var(--f-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin: 0 0 24px;
}

/* ===== Layout ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.container--prose { max-width: 920px; }
.section { padding: 100px 0; border-top: 1px solid var(--c-gray-light); }
.section--alt { background: var(--c-off-white); }
.section--first { border-top: 0; }
.section__lead {
  font-size: 20px;
  line-height: 1.6;
  color: var(--c-gray);
  max-width: 720px;
  margin: 24px 0 60px;
}

/* ===== Navigation ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  height: 80px;
  box-shadow: rgba(0, 0, 0, 0.05) 0px 1px 70px 0px;
}
.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.nav__links { display: flex; gap: 8px; }
.nav__links a {
  font-size: 16px;
  padding: 0 16px;
  height: 80px;
  line-height: 80px;
  display: inline-block;
}
.nav__links a:hover,
.nav__links a.is-active { color: var(--c-blue); }
.nav__toggle {
  display: none;
  background: none;
  border: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-black);
  transition: 0.3s ease;
}

/* ===== Breadcrumbs ===== */
.breadcrumb {
  font-size: 14px;
  color: var(--c-gray);
  padding: 24px 0 0;
}
.breadcrumb a:hover { color: var(--c-blue); }
.breadcrumb span { margin: 0 8px; color: var(--c-gray-light); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-ui);
  font-size: 14.4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}
.btn--primary {
  background: var(--c-cream);
  color: var(--c-black);
  padding: 14px 28px;
  height: 47px;
  border-radius: 50px;
  border: 0;
}
.btn--primary:hover { background: #D9D8D0; }
.btn--ghost {
  background: transparent;
  color: var(--c-black);
  padding: 0 20px;
  height: 47px;
  border-radius: 50px;
  border: 1px solid var(--c-gray-light);
}
.btn--ghost:hover { color: var(--c-blue); border-color: var(--c-blue); }

/* ===== Hero ===== */
.hero { padding: 80px 0 60px; }
.hero h1 { max-width: 980px; margin-bottom: 32px; }
.hero__lead {
  font-size: 22px;
  line-height: 1.55;
  color: var(--c-gray);
  max-width: 720px;
  margin-bottom: 40px;
}
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Page Header (Unterseiten) ===== */
.page-header { padding: 40px 0 60px; }
.page-header h1 {
  font-size: 52px;
  max-width: 920px;
  margin-bottom: 24px;
}
.page-header__lead {
  font-size: 20px;
  color: var(--c-gray);
  max-width: 720px;
  line-height: 1.55;
}

/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 80px;
  padding-top: 52px;
  border-top: 1px solid var(--c-gray-light);
}
.stat__value {
  font-family: var(--f-display);
  font-size: 48px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.stat__label { font-size: 14px; color: var(--c-gray); }

/* ===== Services Grid ===== */
.services {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--c-gray-light);
}
.service {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-gray-light);
  display: flex;
  flex-direction: column;
}
.service:nth-child(odd) {
  padding-right: 40px;
  border-right: 1px solid var(--c-gray-light);
}
.service:nth-child(even) { padding-left: 40px; }
.service__num {
  font-family: var(--f-ui);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-blue);
  letter-spacing: 0.18em;
  margin-bottom: 16px;
}
.service h3 { margin-bottom: 16px; }
.service p { color: var(--c-gray); font-size: 16px; }
.service__fit {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--c-gray-light);
  font-size: 15px;
  color: var(--c-charcoal);
}
.service__link {
  margin-top: auto;
  padding-top: 24px;
  font-family: var(--f-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-blue);
}
.service__link:hover { color: var(--c-blue-deep); }

/* ===== Projects ===== */
.projects {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-gray-light);
}
.project {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 40px;
  padding: 40px 0;
  border-bottom: 1px solid var(--c-gray-light);
  align-items: start;
}
.project--link { transition: background 0.3s ease; }
.project--link:hover { background: var(--c-off-white); }
.project__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.tag {
  font-family: var(--f-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gray);
  padding: 4px 10px;
  border: 1px solid var(--c-gray-light);
  border-radius: 50px;
}
.tag--year { color: var(--c-blue); border-color: var(--c-blue); }
.project h3 { margin-bottom: 12px; }
.project p { color: var(--c-gray); font-size: 16px; margin: 0; }
.project__stat {
  text-align: right;
  padding-left: 24px;
  border-left: 1px solid var(--c-gray-light);
}
.project__value {
  display: block;
  font-family: var(--f-display);
  font-size: 40px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.project__label { font-size: 13px; color: var(--c-gray); }

/* ===== Prose Content (Detail-Seiten) ===== */
.prose {
  max-width: var(--max-w-prose);
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-charcoal);
}
.prose h2 {
  font-size: 32px;
  margin: 48px 0 20px;
  color: var(--c-black);
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-size: 22px;
  margin: 32px 0 12px;
  color: var(--c-black);
  font-weight: 500;
}
.prose p { margin: 0 0 20px; }
.prose ul, .prose ol { margin: 0 0 24px; padding-left: 24px; }
.prose li { margin-bottom: 10px; }
.prose strong { color: var(--c-black); }
.prose a { color: var(--c-blue); border-bottom: 1px solid var(--c-blue); }
.prose a:hover { color: var(--c-blue-deep); border-color: var(--c-blue-deep); }

.callout {
  background: var(--c-cream);
  padding: 28px 32px;
  margin: 32px 0;
  border-left: 3px solid var(--c-blue);
}
.callout p:last-child { margin: 0; }
.callout strong { display: block; margin-bottom: 8px; font-size: 14px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-gray); font-weight: 600; }

/* ===== Tech Stack Pills ===== */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 32px;
}
.tech-pill {
  font-family: var(--f-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-charcoal);
  padding: 6px 14px;
  background: var(--c-off-white);
  border-radius: 50px;
}

/* ===== Two-Column Detail Layout ===== */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
  margin-top: 40px;
}
.detail-side {
  background: var(--c-off-white);
  padding: 32px;
  align-self: start;
  position: sticky;
  top: 100px;
}
.detail-side h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin-bottom: 16px;
}
.detail-side__item {
  padding: 12px 0;
  border-top: 1px solid var(--c-gray-light);
  font-size: 14px;
}
.detail-side__item:first-of-type { border-top: 0; }
.detail-side__label { display: block; color: var(--c-gray); margin-bottom: 4px; font-size: 12px; }
.detail-side__value { display: block; color: var(--c-black); }

/* ===== CTA Section ===== */
.cta {
  background: var(--c-black);
  color: var(--c-white);
  padding: 80px 0;
  text-align: center;
}
.cta h2 { color: var(--c-white); max-width: 720px; margin: 0 auto 24px; }
.cta p {
  color: var(--c-gray-light);
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 40px;
}
.cta .btn--primary {
  background: var(--c-white);
  color: var(--c-black);
}
.cta .btn--primary:hover { background: var(--c-cream); }

/* ===== Certificates ===== */
.certs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}
.cert {
  background: var(--c-white);
  border: 1px solid var(--c-gray-light);
  padding: 32px 24px;
}
.cert__title {
  font-family: var(--f-display);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 8px;
}
.cert__sub { font-size: 14px; color: var(--c-gray); }

/* ===== Contact ===== */
.contact h2 { max-width: 720px; }
.availability {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--c-gray-dark);
  padding: 10px 18px;
  background: var(--c-cream);
  border-radius: 50px;
  margin: 24px 0 48px;
}
.dot {
  width: 8px;
  height: 8px;
  background: #2ea043;
  border-radius: 50%;
  display: inline-block;
}
.contact__channels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 720px;
}
.contact__channel {
  display: block;
  padding: 32px;
  background: var(--c-white);
  border: 1px solid var(--c-gray-light);
  transition: border-color 0.3s ease, color 0.3s ease;
}
.contact__channel:hover { border-color: var(--c-blue); color: var(--c-blue); }
.contact__label {
  display: block;
  font-family: var(--f-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gray);
  margin-bottom: 12px;
}
.contact__value {
  display: block;
  font-family: var(--f-display);
  font-size: 22px;
  font-weight: 400;
}

/* ===== Contact Form ===== */
.form {
  max-width: 640px;
  margin-top: 40px;
}
.form__group { margin-bottom: 24px; }
.form__label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--c-black);
}
.form__input, .form__textarea {
  width: 100%;
  font-family: var(--f-ui);
  font-size: 16px;
  padding: 14px 16px;
  background: var(--c-white);
  color: var(--c-black);
  border: 1px solid var(--c-gray-light);
  border-radius: 0;
  transition: border-color 0.3s ease;
}
.form__textarea { min-height: 140px; resize: vertical; }
.form__input:focus, .form__textarea:focus {
  outline: none;
  border-color: var(--c-blue);
}
.form__hint { font-size: 13px; color: var(--c-gray); margin-top: 8px; }

/* ===== Footer ===== */
.footer {
  background: var(--c-charcoal);
  color: var(--c-gray-light);
  padding: 60px 0 32px;
}
.footer__inner { display: flex; flex-direction: column; gap: 40px; }
.footer__cols {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer__col h4 {
  font-family: var(--f-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-white);
  margin-bottom: 16px;
}
.footer__col a, .footer__col p {
  display: block;
  color: var(--c-gray-light);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
}
.footer__col a:hover { color: var(--c-white); }
.footer__legal {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-gray-light);
}
.footer__legal strong { color: var(--c-white); font-weight: 500; }
.footer__bottom {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--c-gray);
  padding-top: 24px;
  border-top: 1px solid #3a3a3a;
}
.footer__bottom a:hover { color: var(--c-white); }

/* ===== Responsive ===== */
@media (max-width: 1199px) {
  :root { --pad-x: 40px; }
  h1 { font-size: 52px; }
  h2 { font-size: 36px; }
  .page-header h1 { font-size: 44px; }
  .detail-grid { grid-template-columns: 1fr 280px; gap: 40px; }
}

@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .services { grid-template-columns: 1fr; }
  .service:nth-child(odd) { padding: 40px 0; border-right: 0; }
  .service:nth-child(even) { padding: 40px 0; }
  .certs { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  :root { --pad-x: 24px; }
  .nav, .nav__inner { height: 64px; }
  .nav__links a { height: auto; line-height: 1.5; padding: 16px 0; }
  .nav__toggle { display: flex; }
  .nav__links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--c-white);
    flex-direction: column;
    gap: 0;
    padding: 16px 24px;
    border-bottom: 1px solid var(--c-gray-light);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  h1 { font-size: 40px; }
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }
  .page-header h1 { font-size: 36px; }
  .hero { padding: 60px 0 48px; }
  .hero__lead { font-size: 18px; }
  .hero__actions .btn { width: 100%; }
  .section { padding: 60px 0; }
  .section__lead { font-size: 17px; margin-bottom: 40px; }
  .stats { margin-top: 52px; padding-top: 40px; }
  .stat__value { font-size: 36px; }
  .project { grid-template-columns: 1fr; gap: 24px; }
  .project__stat { text-align: left; padding-left: 0; padding-top: 20px; border-left: 0; border-top: 1px solid var(--c-gray-light); }
  .project__value { font-size: 32px; }
  .contact__channels { grid-template-columns: 1fr; }
  .contact__value { font-size: 18px; }
  .footer__cols { grid-template-columns: 1fr; }
  .prose { font-size: 16px; }
  .prose h2 { font-size: 26px; }
}

@media (max-width: 374px) {
  :root { --pad-x: 16px; }
  h1 { font-size: 36px; }
  .page-header h1 { font-size: 32px; }
}