/* ==========================================================================
   ostmodern.com — One-Pager
   ========================================================================== */

/* Self-hosted webfonts (no third-party requests at runtime) */
@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
  src: url('../fonts/fraunces-variable.woff2') format('woff2');
}

@font-face {
  font-family: 'Fraunces';
  font-style: italic;
  font-weight: 400 500;
  font-display: swap;
  src: url('../fonts/fraunces-italic-variable.woff2') format('woff2');
}

@font-face {
  font-family: 'Public Sans';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('../fonts/public-sans-variable.woff2') format('woff2');
}

:root {
  --brand-blue: #2c87ff;
  --paper: #ffffff;
  --paper-alt: #1c1e22;
  --ink: #1c1e22;
  --ink-soft: #52565c;
  --ink-faint: #83878d;
  --accent: var(--ink);
  --accent-button: #ffffff;
  --accent-button-hover: #e7e8ea;
  --accent-button-text: #1c1e22;
  --ink-hover: #3a3f46;
  --line: #e2e3e5;
  --max: 1180px;
  --measure: 38em;
  --serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --sans: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  color: var(--ink);
  margin: 0;
}

p { margin: 0 0 1.2em; }
p:last-child { margin-bottom: 0; }

/* ---------- Nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}

/* Backdrop-filter lives on a ::before, not on .site-nav itself: a filter on
   an ancestor creates a new containing block for position:fixed descendants
   (like .nav-links), which breaks/mispositions the mobile menu once it
   activates on scroll. Keeping it off .site-nav avoids that entirely. */
.site-nav::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255, 255, 255, 0);
  transition: background 0.25s ease;
}

.site-nav.is-scrolled::before {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(140%) blur(6px);
}

.site-nav.is-scrolled {
  border-bottom-color: var(--line);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 96px;
}

.brand {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  flex-shrink: 0;
}

.brand img {
  display: block;
  height: 64px;
  width: auto;
  filter: drop-shadow(0 2px 5px rgba(28, 30, 34, 0.18));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.nav-links a:hover { color: var(--ink); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  background: var(--ink);
  color: var(--paper) !important;
  padding: 0.55em 1.15em;
  border-radius: 2px;
  font-size: 0.85rem !important;
  font-weight: 500;
  white-space: nowrap;
}

.nav-cta:hover { background: var(--ink-hover); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
}

.nav-toggle svg { display: block; }

/* ---------- Hero ---------- */

.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 55% at 50% 8%, rgba(154, 74, 44, 0.08), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 880px;
}

.hero h1 {
  font-size: clamp(2.1rem, 5.4vw, 3.7rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 400;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  margin-top: 1.7rem;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--ink-soft);
  max-width: 32em;
}

/* ---------- Section shell ---------- */

section { padding: 7rem 0; }

.section-alt {
  background: var(--paper-alt);
  --ink: #f4f4f5;
  --ink-soft: #b7b9bd;
  --ink-faint: #85888d;
  --line: rgba(255, 255, 255, 0.14);
  --accent: var(--ink);
}

.section-head {
  margin-bottom: 3rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.22;
  max-width: 16em;
}

/* ---------- Manifest ---------- */

.manifest-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 4rem;
  align-items: start;
}

.manifest-body {
  max-width: var(--measure);
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.manifest-body p { margin-bottom: 1.4em; }

.manifest-lede {
  font-family: var(--serif);
  font-size: 1.3rem;
  color: var(--ink);
  font-style: italic;
  line-height: 1.5;
  border-left: 2px solid var(--accent);
  padding-left: 1.3rem;
  margin: 2.2rem 0 0;
}

/* ---------- Beweis ---------- */

.proof-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 4.5rem;
  align-items: center;
}

.proof-media {
  position: relative;
}

.proof-media figure { margin: 0; }

.proof-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 35%;
  border-radius: 2px;
}

.proof-caption {
  margin-top: 0.9rem;
  font-size: 0.82rem;
  color: var(--ink-faint);
  font-style: italic;
}

.proof-tag {
  display: inline-block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
  margin-bottom: 1.1rem;
}

.proof-body {
  font-size: 1.02rem;
  color: var(--ink-soft);
}

/* ---------- Wer wir sind ---------- */

.person-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 3rem;
  align-items: start;
}

.people {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
}

.person {
  margin: 0;
}

.person img {
  width: 100%;
  aspect-ratio: 500 / 538;
  object-fit: cover;
  border-radius: 2px;
  filter: grayscale(1);
}

.person figcaption {
  margin-top: 0.9rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
}

.about-body {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-left: 0;
}

.about-body p { margin-bottom: 1.4em; }

.about-body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.about-body a:hover { text-decoration-color: var(--accent); }

/* ---------- CTA ---------- */

.cta {
  text-align: center;
  padding: 8rem 0;
  position: relative;
}

.cta-sub {
  max-width: 34em;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin-top: 2.4rem;
  background: var(--accent-button);
  color: var(--accent-button-text);
  text-decoration: none;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  padding: 1rem 1.9rem;
  border-radius: 2px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background: var(--accent-button-hover);
  transform: translateY(-1px);
}


/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--line);
  padding: 2.4rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.footer-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.footer-links {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--ink-faint);
}

.footer-links a:hover { color: var(--ink); }

/* ---------- Reveal-on-scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Legal pages ---------- */

.legal-page {
  padding: 5rem 0 6rem;
}

.legal-page .wrap { max-width: 760px; }

.legal-back {
  display: inline-block;
  margin-bottom: 2.5rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.legal-back:hover { color: var(--accent); }

.legal-page h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin-bottom: 2.2rem;
}

.legal-page h2 {
  font-size: 1.2rem;
  margin: 2.4rem 0 0.8rem;
}

.legal-page p, .legal-page li {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .manifest-grid,
  .proof-grid,
  .person-split {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .proof-media img { aspect-ratio: 4 / 3; }
  .people { gap: 1.2rem; }

  section { padding: 4.5rem 0; }
  .cta { padding: 5.5rem 0; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 96px;
    left: 0;
    right: 0;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: saturate(140%) blur(6px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 1rem 24px 2rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .nav-links.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    border-bottom: 1px solid var(--line);
  }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }

  .nav-links .nav-cta {
    margin-top: 1rem;
    text-align: center;
    justify-content: center;
    border-bottom: none;
  }

  .nav-toggle { display: block; }

  .hero { min-height: 82vh; padding: 5rem 0 4rem; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
}