/* Fonts are self-hosted so no visitor data goes to Google Fonts. */
@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/plex-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/plex-sans-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/plex-sans-600.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  --paper: #f6f4ee;
  --paper-deep: #eeebe2;
  --surface: #fffefb;
  --ink: #14181f;
  --ink-soft: #4a505b;
  --ink-faint: #666b75;
  --rule: #d8d4c8;
  --accent: #b23a0a;
  --accent-bright: #f0814e;
  --go: #1c7c54;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }

h1, h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.75rem, 6vw, 4.75rem); line-height: 1.04; }
h2 { font-size: clamp(2rem, 3.8vw, 3rem); line-height: 1.12; }
h3 { font-size: 1.1875rem; font-weight: 600; line-height: 1.35; }

a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { width: min(100% - 3rem, 1180px); margin-inline: auto; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.5rem 1rem;
  background: var(--ink);
  color: var(--paper);
}
.skip-link:focus { top: 0.5rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.25rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.brand__mark {
  padding: 0.1rem 0.4rem;
  background: var(--ink);
  color: var(--paper);
  font: 400 0.8125rem/1.5 var(--mono);
}
.site-nav { display: flex; gap: 1.75rem; font-size: 0.9375rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; }
.site-nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 0.3em; }
.site-header__actions { display: flex; align-items: center; gap: 1.25rem; }
.lang-switch { display: flex; gap: 0.6rem; font: 400 0.8125rem/1 var(--mono); }
.lang-switch a { color: var(--ink-faint); text-decoration: none; padding: 0.35rem 0.1rem; }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a[aria-current] { color: var(--ink); border-bottom: 2px solid var(--accent); }

/* Buttons */
.button {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font: 500 1rem/1.3 var(--sans);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.button:hover { background: var(--accent); border-color: var(--accent); }
.button--small { padding: 0.5rem 0.9rem; font-size: 0.875rem; white-space: nowrap; }
.button--quiet { background: transparent; color: var(--ink); }
.button--quiet:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.button--light { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.button--light:hover { background: var(--accent-bright); border-color: var(--accent-bright); color: var(--ink); }
.button:disabled { opacity: 0.6; cursor: progress; }

/* Hero */
.hero { padding: clamp(3rem, 7vw, 6rem) 0 clamp(3rem, 6vw, 5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: center;
}
.availability {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
  font: 400 0.875rem/1.4 var(--mono);
}
.availability__dot {
  flex: none;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--go);
}
.lead {
  max-width: 40rem;
  margin-top: 1.75rem;
  color: var(--ink-soft);
  font-size: clamp(1.125rem, 1.6vw, 1.25rem);
  line-height: 1.6;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.25rem; }

.sheet { background: var(--surface); border: 1px solid var(--ink); }
.sheet__title {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 1.1rem;
  background: var(--ink);
  color: var(--paper);
  font: 400 0.8125rem/1.4 var(--mono);
}
.sheet dl > div {
  display: grid;
  grid-template-columns: 6.25rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.7rem 1.1rem;
  border-top: 1px solid var(--rule);
}
.sheet dl > div:first-child { border-top: 0; }
.sheet dt { color: var(--ink-faint); font: 400 0.8125rem/1.6 var(--mono); }
.sheet dd { font-size: 0.9375rem; line-height: 1.45; }
.sheet dl > div:first-child dd { color: var(--go); font-weight: 600; }

/* Client strip */
.clients { border-block: 1px solid var(--rule); padding: 1.25rem 0; }
.clients__inner { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 2rem; }
.clients__label { color: var(--ink-faint); font: 400 0.8125rem/1.5 var(--mono); }
.clients ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.75rem; font-weight: 500; }

/* Sections */
.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section--tinted { background: var(--paper-deep); }
.eyebrow {
  margin-bottom: 1rem;
  color: var(--ink-soft);
  font: 400 0.8125rem/1.5 var(--mono);
}
.eyebrow span { color: var(--accent); }
.section__lead { max-width: 38rem; margin-top: 1rem; color: var(--ink-soft); font-size: 1.125rem; }

/* Services */
.services {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 3rem;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.service { display: flex; flex-direction: column; gap: 0.85rem; padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--paper); }
.service h3 { font: 400 1.625rem/1.2 var(--serif); }
.service__situation { font-weight: 500; }
.service > p:not(.service__situation) { color: var(--ink-soft); }
.service > p.service__refs { margin-top: auto; padding-top: 0.5rem; color: var(--ink-faint); font: 400 0.8125rem/1.5 var(--mono); }
.service__refs a { color: var(--accent); text-underline-offset: 0.2em; }

/* Projects */
.projects { margin-top: 3rem; border-bottom: 1px solid var(--ink); }
.project {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: 1rem clamp(2rem, 5vw, 4.5rem);
  padding: 2rem 0;
  border-top: 1px solid var(--ink);
}
.project:target { background: var(--surface); box-shadow: -1rem 0 0 var(--surface), 1rem 0 0 var(--surface); }
.project__meta { color: var(--ink-soft); font: 400 0.8125rem/1.6 var(--mono); }
.project__client { margin-bottom: 0.3rem; color: var(--ink); font: 600 1.0625rem/1.4 var(--sans); }
.project__body { max-width: 46rem; }
.project__body h3 { margin-bottom: 0.6rem; font: 400 1.625rem/1.2 var(--serif); }
.project__body > p { color: var(--ink-soft); }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.tags li {
  padding: 0.1rem 0.5rem;
  border: 1px solid #bdb8a9;
  border-radius: 2px;
  color: var(--ink-soft);
  font: 400 0.75rem/1.6 var(--mono);
}

/* About */
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3.5rem); margin-top: 3rem; }
.principle { padding-top: 1rem; border-top: 2px solid var(--ink); }
.principle p { margin-top: 0.6rem; color: var(--ink-soft); }
.steps__title { margin-top: clamp(3.5rem, 6vw, 5rem); font: 400 1.75rem/1.2 var(--serif); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3.5rem); margin-top: 1.75rem; counter-reset: step; }
.steps li { counter-increment: step; }
.steps li::before { content: "0" counter(step); display: block; margin-bottom: 0.5rem; color: var(--accent); font: 400 0.875rem/1.5 var(--mono); }
.steps strong { font-weight: 600; }
.steps p { margin-top: 0.3rem; color: var(--ink-soft); }

/* Stack */
.stack__grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(2.5rem, 6vw, 5rem); align-items: start; }
.skills { margin-top: 2.5rem; border-bottom: 1px solid var(--rule); }
.skills > div { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: 1rem; padding: 0.85rem 0; border-top: 1px solid var(--rule); }
.skills dt { color: var(--ink-faint); font: 400 0.8125rem/1.8 var(--mono); }
.oss { padding: 1.75rem; background: var(--surface); border: 1px solid var(--ink); }
.oss h3 { margin-bottom: 0.6rem; font: 400 1.875rem/1.2 var(--mono); letter-spacing: -0.03em; }
.oss > p:not(.eyebrow) { color: var(--ink-soft); }
.link-arrow { display: inline-block; margin-top: 1.1rem; color: var(--accent); font-weight: 500; text-underline-offset: 0.25em; }

/* FAQ */
.faq__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.faq { border-bottom: 1px solid var(--rule); }
.faq details { border-top: 1px solid var(--rule); }
.faq summary {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem 0;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; color: var(--accent); font: 400 1.25rem/1.3 var(--mono); }
.faq details[open] summary::after { content: "–"; }
.faq summary:hover { color: var(--accent); }
.faq details p { max-width: 42rem; padding-bottom: 1.4rem; color: var(--ink-soft); }

/* Contact */
.contact { padding: clamp(4rem, 8vw, 7rem) 0; background: var(--ink); color: var(--paper); }
.contact .eyebrow { color: #b9bcc2; }
.contact .eyebrow span { color: var(--accent-bright); }
.contact__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2.5rem, 6vw, 6rem); align-items: start; }
.contact__lead { margin: 1.25rem 0 1.5rem; color: #cfd1d6; font-size: 1.125rem; }
.availability--dark { margin-bottom: 0; }
.availability--dark .availability__dot { background: #4bd19a; }
.contact__alt { margin-top: 1.5rem; color: #cfd1d6; }
.contact__alt a { color: var(--paper); text-underline-offset: 0.25em; }
.form { display: flex; flex-direction: column; align-items: flex-start; }
.form label { margin-bottom: 0.4rem; color: #cfd1d6; font: 400 0.8125rem/1.5 var(--mono); }
.form input, .form textarea {
  width: 100%;
  margin-bottom: 1.25rem;
  padding: 0.8rem 0.9rem;
  border: 1px solid #5d636e;
  border-radius: 2px;
  background: #1e232c;
  color: var(--paper);
  font: 400 1rem/1.5 var(--sans);
}
.form textarea { resize: vertical; }
.form ::placeholder { color: #9a9ea6; }
.form input:focus-visible, .form textarea:focus-visible { outline-color: var(--accent-bright); outline-offset: 1px; }
.form :is(.button):focus-visible { outline-color: var(--accent-bright); }
.form__trap { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form__status { margin-top: 1rem; color: #7fe3b8; }
.form__status:empty { display: none; }
.form__status.is-error { color: #ffb199; }
.form__note { margin-top: 1rem; color: #b9bcc2; font-size: 0.8125rem; line-height: 1.5; }
.form__note a { color: inherit; text-underline-offset: 0.2em; }

/* Footer */
.site-footer { padding: 1.5rem 0; background: var(--ink); border-top: 1px solid #333945; color: #b9bcc2; font-size: 0.875rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; }
.site-footer ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.site-footer a { text-underline-offset: 0.2em; }
.site-footer a:hover { color: var(--paper); }

/* Legal pages and 404 */
.legal { max-width: 46rem; }
.legal h1 { font-size: clamp(2.25rem, 4.5vw, 3.25rem); margin-bottom: 2.5rem; }
.legal h2 { margin: 2.5rem 0 0.75rem; font-size: 1.75rem; }
.legal h3 { margin: 1.75rem 0 0.4rem; }
.legal p { color: var(--ink-soft); }
.legal p + p { margin-top: 0.85rem; }
.legal strong { font-weight: 600; color: var(--ink); }
.legal a { color: var(--accent); }
.legal hr { margin: 3rem 0; border: 0; border-top: 1px solid var(--rule); }
.not-found__url { margin: 1.5rem 0 2rem; color: var(--ink-faint); font: 400 0.875rem/1.5 var(--mono); overflow-wrap: anywhere; }

/* Responsive */
@media (max-width: 1020px) {
  .site-nav { display: none; }
  .hero__grid, .stack__grid, .faq__grid, .contact__grid { grid-template-columns: minmax(0, 1fr); }
  .sheet { max-width: 38rem; }
}
@media (max-width: 720px) {
  body { font-size: 1rem; }
  .services, .principles, .steps { grid-template-columns: minmax(0, 1fr); }
  .project { grid-template-columns: minmax(0, 1fr); padding: 1.5rem 0; }
  .skills > div { grid-template-columns: minmax(0, 1fr); gap: 0.1rem; }
  .brand__mark { display: none; }
  .site-header__actions { gap: 0.75rem; }
  .hero__actions .button { flex: 1 1 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}

@media print {
  .site-header, .contact form, .hero__actions { display: none; }
  .contact, .site-footer { background: none; color: inherit; }
}

/* Consent banner */
.footer-button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}
.footer-button:hover { color: var(--paper); }
.footer-button[hidden] { display: none; }

.consent {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  max-width: 1180px;
  margin-inline: auto;
  padding: 1.1rem 1.4rem;
  background: var(--ink);
  border: 1px solid #5d636e;
  color: #cfd1d6;
  font-size: 0.875rem;
  line-height: 1.5;
}
.consent[hidden] { display: none; }
.consent__title { margin-bottom: 0.2rem; color: var(--paper); font-weight: 600; }
.consent a { color: inherit; text-underline-offset: 0.2em; }
.consent__actions { display: flex; flex: none; gap: 0.6rem; }
.consent :focus-visible { outline-color: var(--accent-bright); }

@media (max-width: 720px) {
  .consent { flex-direction: column; align-items: stretch; }
  .consent__actions .button { flex: 1; }
}

@media print {
  .consent { display: none; }
}

/* Testimonials */
.testimonials { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.5rem, 4vw, 3.5rem); margin: 3rem 0 0; }
.testimonial { display: flex; flex-direction: column; justify-content: space-between; gap: 1.25rem; margin: 0; padding-top: 1rem; border-top: 2px solid var(--ink); }
.testimonial blockquote { margin: 0; font: 400 1.3125rem/1.4 var(--serif); }
.testimonial blockquote::before { content: "„"; }
.testimonial blockquote::after { content: "“"; }
:lang(en) .testimonial blockquote::before { content: "“"; }
:lang(en) .testimonial blockquote::after { content: "”"; }
.testimonial figcaption { color: var(--ink-soft); font: 400 0.8125rem/1.6 var(--mono); }
.testimonial figcaption strong { display: block; color: var(--ink); font: 600 1rem/1.5 var(--sans); }
.testimonials__source { margin-top: 2rem; color: var(--ink-faint); font: 400 0.8125rem/1.5 var(--mono); }
.testimonials__source a { color: var(--accent); text-underline-offset: 0.2em; }

@media (max-width: 860px) {
  .testimonials { grid-template-columns: minmax(0, 1fr); }
}