/* Amperstrand — shared design tokens & base styles */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@400;500;600;700;800;900&family=Inter:wght@400;500;600&family=Caveat:wght@500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --yellow: #f9cf2c;
  --yellow-warm: #f7c41a;
  --ink: #0a0a0a;
  --ink-soft: #1a1a1a;
  --paper: #fafaf7;
  --paper-2: #f4efe4;
  --deep: #0e1a2b;
  --stone: #e8e1d3;
  --stone-2: #d9cfbb;
  --muted: #6b6b66;

  --font-display: 'Inter Tight', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-hand: 'Caveat', cursive;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --max: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  /* Verhindert horizontales Swipen/Scrollen der Seite (iOS Safari braucht beide) */
  overflow-x: hidden;
  overscroll-behavior-x: none;
  max-width: 100%;
}
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.55;
  text-wrap: pretty;
}
/* Landing-Page: Body gelb, damit iOS-Rubber-Band oben gelb statt weiß zeigt.
   Alle weißen Sektionen auf der Homepage haben ihre eigene paper-bg-Regel. */
body[data-tone="yellow"] { background: var(--yellow); }

/* Typography */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.05; margin: 0; }
h1 { font-size: clamp(44px, 8vw, 104px); letter-spacing: -0.035em; font-weight: 800; }
h2 { font-size: clamp(32px, 5vw, 64px); letter-spacing: -0.03em; }
h3 { font-size: clamp(22px, 2.4vw, 32px); letter-spacing: -0.02em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }

.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.02em; text-transform: uppercase; }
.hand { font-family: var(--font-hand); font-weight: 500; }

/* Layout */
.wrap { max-width: var(--max); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.bleed { width: 100%; }
section { position: relative; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--gutter);
  transition: background .4s var(--ease), backdrop-filter .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.solid {
  background: rgba(250, 250, 247, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: rgba(10,10,10,.06);
}
.nav.on-yellow.solid { background: rgba(249, 207, 44, 0.82); border-bottom-color: rgba(10,10,10,.1); }
/* Burger-Nav ist immer undurchsichtig — kein transparenter Header.
   900px statt 820px: darunter passen Logo + Links + EST. nicht mehr
   nebeneinander und laufen ineinander. */
@media (max-width: 900px) {
  .nav, .nav.solid {
    background: var(--paper);
    border-bottom: 1px solid rgba(10,10,10,.08);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav.on-yellow, .nav.on-yellow.solid { background: var(--yellow); border-bottom-color: rgba(10,10,10,.1); }
  .nav.on-ink, .nav.on-ink.solid { background: var(--deep); border-bottom-color: rgba(250,250,247,.1); }
}
.nav.on-ink { color: var(--paper); }
.nav.on-ink .nav-links a { color: var(--paper); }
.nav.on-ink .nav-links a.active::after { background: var(--paper); }
.nav.on-ink.solid { background: rgba(14, 26, 43, 0.82); border-bottom-color: rgba(250,250,247,.1); }
.nav-logo { display: flex; align-items: center; font-family: var(--font-display); font-weight: 800; font-size: 24px; letter-spacing: -0.025em; }
.nav-links { display: flex; gap: 28px; align-items: center; font-size: 14px; font-weight: 500; }
.nav-links a { position: relative; padding: 4px 0; color: var(--ink); opacity: .78; transition: opacity .2s; }
.nav-links a:hover { opacity: 1; }
.nav-links a.active { opacity: 1; }
.nav-links a.active::after { content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px; background: var(--ink); }
.nav-right { display: flex; align-items: center; gap: 18px; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 10px;
  border-radius: 999px;
  background: var(--ink); color: var(--paper);
  font-size: 12.5px; font-weight: 500;
  cursor: pointer;
}
.status-pill .dot { width: 8px; height: 8px; border-radius: 50%; }

.nav-est {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .55;
  font-weight: 500;
}
.nav.on-ink .nav-est { color: var(--paper); }.status-pill .dot.green { background: #4ade80; box-shadow: 0 0 0 0 rgba(74,222,128,.7); animation: pulse 2s infinite; }
.status-pill .dot.amber { background: #facc15; }
.status-pill .dot.red { background: #ef4444; }
.status-pill .dot.blue { background: #7dd3fc; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(74,222,128,.6);} 70%{box-shadow:0 0 0 10px rgba(74,222,128,0);} 100%{box-shadow:0 0 0 0 rgba(74,222,128,0);} }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-est { display: none; }
}

/* Burger button */
.nav-burger {
  display: none;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid rgba(10,10,10,.15);
  border-radius: 999px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  position: relative;
  z-index: 102;
}
.nav.on-ink .nav-burger { border-color: rgba(250,250,247,.25); }
.nav-burger span {
  display: block;
  width: 16px; height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.nav.on-ink .nav-burger span { background: var(--paper); }
.nav-burger.active span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-burger.active span:nth-child(2) { opacity: 0; }
.nav-burger.active span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
@media (max-width: 900px) {
  .nav-burger { display: inline-flex; }
}

/* Nav overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  padding: 80px var(--gutter) 32px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.nav-overlay-close {
  position: absolute;
  top: 14px;
  right: var(--gutter);
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid rgba(250,250,247,.25);
  border-radius: 50%;
  padding: 0;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.nav-overlay-close span {
  position: absolute;
  width: 20px;
  height: 2.5px;
  background: var(--paper);
  border-radius: 2px;
}
.nav-overlay-close span:first-child { transform: rotate(45deg); }
.nav-overlay-close span:last-child { transform: rotate(-45deg); }
.nav-overlay-close:hover,
.nav-overlay-close:focus-visible { background: rgba(250,250,247,.08); border-color: rgba(250,250,247,.5); outline: none; }
.nav-overlay-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.nav-overlay-inner a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 16px 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 10vw, 56px);
  letter-spacing: -0.03em;
  line-height: 1;
  border-bottom: 1px solid rgba(250,250,247,.1);
  color: var(--paper);
  transition: padding-left .3s var(--ease);
}
.nav-overlay-inner a:hover,
.nav-overlay-inner a:active { padding-left: 10px; }
.nav-overlay-inner a .mono {
  font-size: 12px;
  opacity: .4;
  font-weight: 400;
  flex-shrink: 0;
}
.nav-overlay-inner a.active { color: var(--yellow); }
.nav-overlay-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  opacity: .5;
  font-size: 11px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  background: var(--ink); color: var(--paper);
  border-radius: 999px;
  font-weight: 500; font-size: 15px;
  transition: transform .3s var(--ease), background .3s;
  border: none; cursor: pointer;
}
.btn:hover { transform: scale(1.02); background: var(--ink-soft); }
.btn.alt { background: var(--yellow); color: var(--ink); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid rgba(10,10,10,.2); }
.btn.ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.btn .arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* Footer */
.footer {
  background: var(--ink); color: var(--paper);
  padding: 100px var(--gutter) 40px;
  position: relative;
  overflow: hidden;
}
.footer .closer { font-family: var(--font-display); font-size: clamp(44px, 8vw, 120px); font-weight: 800; letter-spacing: -0.035em; line-height: .95; }
.footer .closer .hand { font-family: var(--font-hand); font-weight: 500; color: var(--yellow); font-size: 1.1em; letter-spacing: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-top: 90px; padding-top: 40px; border-top: 1px solid rgba(250,250,247,.12); }
.footer-col h4 { font-size: 13px; font-weight: 500; opacity: .5; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 16px; font-family: var(--font-mono); }
.footer-col a { display: block; padding: 4px 0; opacity: .75; font-size: 15px; transition: opacity .2s; }
.footer-col a:hover { opacity: 1; }
.footer-bottom { margin-top: 60px; padding-top: 24px; border-top: 1px solid rgba(250,250,247,.12); display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: 13px; opacity: .55; font-family: var(--font-mono); }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; margin-top: 56px; } .footer-col:first-child { grid-column: 1 / -1; } .footer-bottom { margin-top: 40px; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* Common section header */
.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; opacity: .6; }
.section-head { margin-bottom: 60px; }
.section-head h2 { margin: 12px 0 16px; max-width: 900px; }
.section-head p.lead { font-size: clamp(17px, 1.4vw, 20px); max-width: 640px; opacity: .75; }

/* Placeholder image */
.ph {
  background: repeating-linear-gradient(
    45deg,
    var(--stone) 0 12px,
    var(--stone-2) 12px 24px
  );
  position: relative;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.ph::after {
  content: attr(data-label);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  text-transform: uppercase; color: rgba(10,10,10,.55);
  background: var(--paper); padding: 6px 10px; border-radius: 4px;
}
.ph.dark { background: repeating-linear-gradient(45deg, #1b1b1b 0 12px, #0a0a0a 12px 24px); }
.ph.dark::after { color: rgba(250,250,247,.7); background: #0a0a0a; }
.ph.yellow { background: repeating-linear-gradient(45deg, #f9cf2c 0 12px, #f0c218 12px 24px); }
.ph.yellow::after { color: rgba(10,10,10,.6); background: var(--yellow); }

/* Wave svg helpers */
.wave-wrap { position: relative; width: 100%; line-height: 0; }

/* Page transitions helper — subtle fade-in on nav */
body.page-enter { animation: pageIn .5s var(--ease); }
@keyframes pageIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* Selection */
::selection { background: var(--yellow); color: var(--ink); }