/* ============================================================
   Linkvolt — shared design system
   Derived from pilot.html. Used by partner.linkvolt.de + subpages.
   ============================================================ */

:root {
  --orange: #EE5A1F;
  --orange-deep: #C84510;
  --cream: #F3EECC;
  --cream-deep: #E8E0AE;
  --ink: #16110E;
  --ink-soft: #3a322c;
  --ink-bg: #0c0a09;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  background: var(--ink-bg);
  color: var(--cream);
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
section { position: relative; overflow: hidden; }

/* ===== WORDMARK ===== */
.wordmark {
  font-family: 'Antonio', sans-serif;
  font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--orange); line-height: 1;
}

/* ===== STRIPE ICON ===== */
.stripe-icon {
  width: 16px; height: 20px; flex-shrink: 0; display: inline-block;
  background: repeating-linear-gradient(to bottom, currentColor 0 2px, transparent 2px 4px);
  clip-path: polygon(0 0, 42% 0, 42% 68%, 100% 68%, 100% 100%, 0 100%);
}

/* ===== NAV ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: color-mix(in srgb, var(--ink-bg) 92%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--cream) 8%, transparent);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo .wordmark { font-size: 22px; }
.nav-back, .nav-link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: color-mix(in srgb, var(--cream) 50%, transparent);
  text-decoration: none; display: flex; align-items: center; gap: 8px;
  transition: color .2s;
}
.nav-back:hover, .nav-link:hover { color: var(--cream); }
.nav-back::before { content: "←"; font-family: sans-serif; }

/* ===== BUTTONS ===== */
.btn {
  font-family: 'Antonio', sans-serif;
  font-weight: 700; text-transform: uppercase; letter-spacing: .06em; font-size: 15px;
  padding: 10px 22px; border-radius: 10px;
  text-decoration: none; display: inline-block;
  transition: opacity .15s, transform .15s; cursor: pointer; border: none;
}
.btn:hover { opacity: .88; transform: translateY(-1px); }
.btn-primary { background: var(--orange); color: var(--cream); }
.btn-ghost { background: transparent; border: 1px solid color-mix(in srgb, var(--cream) 30%, transparent); color: var(--cream); }
.btn-lg { font-size: 18px; padding: 16px 36px; border-radius: 14px; }
.btn-cream { background: var(--cream); color: var(--ink); }

/* ===== HERO ===== */
#hero {
  background: var(--cream); color: var(--ink);
  padding: 140px 0 80px; min-height: 100svh;
  display: flex; align-items: center;
}
#hero.short { min-height: auto; padding: 140px 0 96px; }
.hero-inner { max-width: 1160px; margin: 0 auto; padding: 0 24px; width: 100%; }
.hero-eyebrow {
  display: flex; align-items: center; gap: 14px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 28px; flex-wrap: wrap;
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); flex-shrink: 0; }
.hero-eyebrow .line { height: 1px; background: var(--ink-soft); opacity: .3; flex: 1; max-width: 120px; }
.hero-headline {
  font-family: 'Antonio', sans-serif;
  font-size: clamp(52px, 8.5vw, 110px); line-height: 1.04;
  font-weight: 700; text-transform: uppercase; letter-spacing: .005em;
  color: var(--ink); margin-bottom: 36px;
}
.hero-headline em { font-style: normal; color: var(--orange); display: block; }
.hero-subline {
  font-size: clamp(16px, 2vw, 20px); line-height: 1.55;
  color: var(--ink-soft); max-width: 640px; margin-bottom: 48px;
}
.hero-subline:last-child { margin-bottom: 0; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* weave */
.hero-weave {
  position: absolute; bottom: -80px; right: -80px;
  width: 500px; height: 400px; opacity: .3; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, var(--orange) 0 3px, transparent 3px 14px),
    repeating-linear-gradient(to right, transparent 0 12px, color-mix(in srgb, var(--orange) 22%, transparent) 12px 14px);
  mask: radial-gradient(closest-side at 60% 60%, #000 0%, transparent 75%);
  transform: rotate(-8deg);
}

/* ===== STRIPE BAND ===== */
.stripe-band {
  background: var(--ink);
  border-top: 1px solid color-mix(in srgb, var(--cream) 10%, transparent);
  padding: 20px 0; overflow: hidden;
}
.stripe-band-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.stripe-band-inner .wordmark { font-size: clamp(56px, 8vw, 108px); line-height: 1; }
.stripe-band-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: color-mix(in srgb, var(--cream) 50%, transparent);
  text-align: right; line-height: 1.6; flex-shrink: 0;
}

/* ===== SECTION EYEBROW ===== */
.section-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--orange); display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px;
}
.section-eyebrow::after { content: ""; flex: 1; max-width: 60px; height: 1px; background: var(--orange); opacity: .5; }

/* ===== GENERIC DARK SECTION ===== */
.sec-dark { background: var(--ink-bg); padding: 100px 0; border-top: 1px solid color-mix(in srgb, var(--cream) 6%, transparent); }
.sec-cream { background: var(--cream); color: var(--ink); padding: 100px 0; }
.sec-hl {
  font-family: 'Antonio', sans-serif;
  font-size: clamp(36px, 5vw, 60px); font-weight: 700; text-transform: uppercase;
  line-height: 1.08; letter-spacing: .01em; margin-bottom: 18px;
}
.sec-dark .sec-hl { color: var(--cream); }
.sec-cream .sec-hl { color: var(--ink); }
.sec-hl em { font-style: normal; color: var(--orange); display: block; }
.sec-lead { font-size: 18px; line-height: 1.55; max-width: 620px; margin-bottom: 48px; }
.sec-dark .sec-lead { color: color-mix(in srgb, var(--cream) 65%, transparent); }
.sec-cream .sec-lead { color: var(--ink-soft); }

/* ===== TILES / CARDS ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: color-mix(in srgb, var(--cream) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--cream) 10%, transparent);
  border-radius: 18px; padding: 28px 26px;
  display: flex; flex-direction: column; gap: 16px;
}
.sec-cream .card { background: color-mix(in srgb, var(--ink) 4%, transparent); border-color: color-mix(in srgb, var(--ink) 12%, transparent); }
.card-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: color-mix(in srgb, var(--cream) 45%, transparent);
}
.sec-cream .card-num { color: color-mix(in srgb, var(--ink) 45%, transparent); }
.card-title {
  font-family: 'Antonio', sans-serif; font-size: 28px; font-weight: 600;
  text-transform: uppercase; line-height: 1.08; color: var(--cream);
}
.sec-cream .card-title { color: var(--ink); }
.card-body { font-size: 15px; line-height: 1.5; color: color-mix(in srgb, var(--cream) 65%, transparent); flex: 1; }
.sec-cream .card-body { color: var(--ink-soft); }
.card-foot {
  margin-top: auto; padding-top: 16px;
  border-top: 1px dashed color-mix(in srgb, var(--cream) 15%, transparent);
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  color: color-mix(in srgb, var(--cream) 40%, transparent);
  letter-spacing: .08em; text-transform: uppercase;
}
.sec-cream .card-foot { border-top-color: color-mix(in srgb, var(--ink) 18%, transparent); color: color-mix(in srgb, var(--ink) 45%, transparent); }

/* ===== TILE (router, clickable) ===== */
.tile {
  text-decoration: none; cursor: pointer; position: relative;
  transition: border-color .2s, transform .2s, background .2s;
}
.tile:hover { border-color: color-mix(in srgb, var(--orange) 70%, transparent); transform: translateY(-3px); background: color-mix(in srgb, var(--cream) 8%, transparent); }
.tile-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--orange);
}
.tile-link {
  margin-top: auto; padding-top: 18px;
  border-top: 1px dashed color-mix(in srgb, var(--cream) 15%, transparent);
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: .06em;
  color: var(--cream); display: flex; align-items: center; justify-content: space-between;
}
.tile-link .arr { color: var(--orange); transition: transform .2s; }
.tile:hover .tile-link .arr { transform: translateX(5px); }

/* ===== STEPS (Ablauf) ===== */
.steps { display: flex; flex-direction: column; }
.step {
  display: grid; grid-template-columns: 56px 1fr; gap: 24px;
  padding: 26px 0; border-bottom: 1px solid color-mix(in srgb, var(--cream) 10%, transparent);
  align-items: flex-start;
}
.sec-cream .step { border-bottom-color: color-mix(in srgb, var(--ink) 10%, transparent); }
.step:last-child { border-bottom: 0; }
.step-n {
  font-family: 'IBM Plex Mono', monospace; font-size: 34px; line-height: 1;
  color: var(--orange); font-weight: 500; letter-spacing: -.04em;
}
.step h3 {
  font-family: 'Antonio', sans-serif; font-size: 24px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .01em; margin-bottom: 8px;
}
.sec-dark .step h3 { color: var(--cream); }
.sec-cream .step h3 { color: var(--ink); }
.step p { font-size: 16px; line-height: 1.6; }
.sec-dark .step p { color: color-mix(in srgb, var(--cream) 62%, transparent); }
.sec-cream .step p { color: var(--ink-soft); }
.step p strong { font-weight: 600; }
.sec-dark .step p strong { color: var(--cream); }
.sec-cream .step p strong { color: var(--ink); }

/* ===== FACTS BAND ===== */
.facts { background: var(--orange); color: var(--cream); padding: 72px 0; }
.facts-inner { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.fact-value {
  font-family: 'Antonio', sans-serif; font-weight: 700; font-size: clamp(40px, 5vw, 60px);
  line-height: 1; margin-bottom: 14px; text-transform: uppercase;
}
.fact-label { font-size: 15px; line-height: 1.55; color: color-mix(in srgb, var(--cream) 88%, transparent); }

/* ===== KONTAKT / FORM ===== */
#kontakt { background: var(--orange); color: var(--cream); padding: 100px 0; }
.kontakt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.kontakt-hl {
  font-family: 'Antonio', sans-serif; font-size: clamp(36px, 5vw, 60px);
  font-weight: 700; text-transform: uppercase; line-height: 1.08; letter-spacing: .01em; margin-bottom: 20px;
}
.kontakt-sub { font-size: 18px; line-height: 1.55; color: color-mix(in srgb, var(--cream) 85%, transparent); margin-bottom: 32px; }
.kontakt-note {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: color-mix(in srgb, var(--cream) 60%, transparent); line-height: 1.6;
}

.form-card { background: var(--cream); color: var(--ink); border-radius: 20px; padding: 36px 32px; display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }
label {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft);
}
label .opt { color: color-mix(in srgb, var(--ink) 40%, transparent); }
input[type="text"], input[type="email"], select, textarea {
  font-family: 'IBM Plex Sans', sans-serif; font-size: 15px; color: var(--ink);
  background: color-mix(in srgb, var(--ink) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 10px; padding: 11px 14px; width: 100%;
  transition: border-color .15s, box-shadow .15s; appearance: none; -webkit-appearance: none;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath d='M3 5l4 4 4-4' stroke='%233a322c' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; cursor: pointer;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--orange);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--orange) 15%, transparent);
}
input::placeholder, textarea::placeholder { color: color-mix(in srgb, var(--ink) 30%, transparent); }
textarea { resize: vertical; min-height: 120px; line-height: 1.55; }
.form-submit { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding-top: 4px; }
.form-submit-note { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: .06em; color: var(--ink-soft); line-height: 1.6; }

/* ===== FOOTER ===== */
footer { background: var(--ink); border-top: 1px solid color-mix(in srgb, var(--cream) 8%, transparent); padding: 40px 0; }
.footer-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-logo { display: flex; align-items: center; gap: 12px; }
.footer-legal {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: color-mix(in srgb, var(--cream) 35%, transparent);
}
.footer-legal a { color: color-mix(in srgb, var(--cream) 45%, transparent); text-decoration: none; transition: color .2s; }
.footer-legal a:hover { color: var(--cream); }
.footer-legal .sep { margin: 0 10px; opacity: .4; }

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .kontakt-grid { grid-template-columns: 1fr; gap: 48px; }
  .facts-inner { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  #hero { padding: 120px 0 64px; min-height: auto; }
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .form-card { padding: 24px 20px; }
  .sec-dark, .sec-cream, #kontakt { padding: 64px 0; }
  .step { grid-template-columns: 40px 1fr; gap: 16px; }
  .step-n { font-size: 26px; }
}