/* 3D Druck Berlin — Ink Navy & Electric Blue
   Layout: quiet supplier site; one accent, tabular data, mono eyebrows. */
:root {
  --ground: #F6F7F9;
  --surface: #FFFFFF;
  --ink: #101A33;
  --muted: #5C6580;
  --accent: #2D5BFF;
  --accent-ink: #1E43C9;
  --line: #E1E4EB;
  --line-strong: #C9CED9;
  --ok: #157347;
  --warn: #B7791F;
  --err: #C0392B;
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --radius: 4px;
  --wrap: 1120px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--ground);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3, h4 { line-height: 1.15; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: 20px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.muted { color: var(--muted); }
.mono { font-family: var(--font-mono); font-size: 0.9rem; }
.num { font-variant-numeric: tabular-nums; }
.prose { max-width: 68ch; display: grid; gap: 0.9rem; }
.prose h2 { margin-top: 1.2rem; }
.prose h3 { margin-top: 0.6rem; }
.prose ul, .prose ol { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.35rem; }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.prose th, .prose td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; color: var(--muted); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; }
.table-scroll { overflow-x: auto; }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--surface); border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 1.5rem; min-height: 64px; }
.brand { font-weight: 700; letter-spacing: 0.06em; color: var(--ink); font-size: 1.05rem; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand span { color: var(--accent); }
.nav { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.nav a { color: var(--muted); font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: none; }
.header-cta { margin-left: auto; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 0.45rem 0.7rem; font: inherit; color: var(--ink); cursor: pointer; }
@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .header-cta { display: none; }
  .nav { display: none; width: 100%; flex-direction: column; gap: 0.2rem; padding-block: 0.5rem 1rem; }
  .nav a { padding: 0.5rem 0; border-bottom: 1px solid var(--line); }
  .site-header .wrap { flex-wrap: wrap; }
  .site-header.open .nav { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.7rem 1.25rem; border-radius: var(--radius); font: inherit; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; text-decoration: none; line-height: 1.2;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); }
.btn-secondary { background: var(--surface); color: var(--ink); border-color: var(--ink); }
.btn-secondary:hover { background: var(--ground); }
.btn-small { padding: 0.45rem 0.85rem; font-size: 0.9rem; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* Sections */
.section { padding-block: 3.5rem; }
.section-tight { padding-block: 2.25rem; }
.section-surface { background: var(--surface); border-block: 1px solid var(--line); }
.section-head { display: grid; gap: 0.6rem; margin-bottom: 1.75rem; max-width: 60ch; }
.hero { padding-block: 3rem 3.5rem; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 2.5rem; align-items: start; }
.hero-copy { display: grid; gap: 1.1rem; }
.hero-copy .lead { font-size: 1.15rem; color: var(--muted); max-width: 48ch; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); }
.hero-facts b { color: var(--ink); font-weight: 600; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

/* Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.card h3 { font-size: 1.05rem; }
.card .mono { color: var(--muted); font-size: 0.82rem; }
.card-link { color: inherit; }
.card-link:hover { text-decoration: none; border-color: var(--line-strong); }
.card-link .more { color: var(--accent); font-size: 0.9rem; }
.swatch { height: 72px; border-radius: 3px; border: 1px solid var(--line); background: repeating-linear-gradient(180deg, #E9EBF0 0 3px, #D8DBE3 3px 4px); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; counter-reset: step; }
.step { display: grid; gap: 0.4rem; padding-top: 0.9rem; border-top: 2px solid var(--ink); min-width: 0; }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); font-family: var(--font-mono); color: var(--accent); font-size: 0.85rem; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* Calculator */
.calc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 1px 0 rgba(16,26,51,0.04), 0 8px 24px rgba(16,26,51,0.06); display: grid; min-width: 0; }
.calc-head { padding: 0.9rem 1.25rem; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.calc-head strong { font-size: 0.95rem; }
.calc-body { padding: 1.25rem; display: grid; gap: 1rem; }
.drop {
  border: 1.5px dashed var(--line-strong); border-radius: var(--radius); padding: 1.4rem 1rem; text-align: center;
  display: grid; gap: 0.35rem; cursor: pointer; background: var(--ground); transition: border-color 0.15s, background 0.15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: #EEF2FF; }
.drop strong { font-size: 1rem; }
.drop .mono { color: var(--muted); font-size: 0.8rem; }
.drop input { display: none; }
.file-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.5rem; font-size: 0.85rem; }
.file-meta div { background: var(--ground); border-radius: 3px; padding: 0.5rem 0.65rem; min-width: 0; }
.file-meta span { display: block; color: var(--muted); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--font-mono); }
.file-meta b { font-weight: 600; font-variant-numeric: tabular-nums; }
@media (max-width: 480px) { .file-meta { grid-template-columns: 1fr 1fr; } }
.opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem 1rem; }
.field { display: grid; gap: 0.3rem; min-width: 0; }
.field label { font-size: 0.8rem; color: var(--muted); font-weight: 500; }
.field select, .field input[type="number"], .field input[type="text"], .field input[type="email"], .field textarea {
  font: inherit; font-size: 0.95rem; padding: 0.55rem 0.65rem; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface); color: var(--ink); width: 100%; min-width: 0;
}
.field select:focus, .field input:focus, .field textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgba(45,91,255,0.15); }
.price-box { border-top: 1px solid var(--line); padding-top: 1rem; display: grid; grid-template-columns: 1fr auto; gap: 0.5rem 1rem; align-items: end; }
.price-box .label { font-size: 0.8rem; color: var(--muted); }
.price-box .price { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; line-height: 1; }
.price-box .per { font-size: 0.85rem; color: var(--muted); }
.price-lines { display: grid; gap: 0.25rem; font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.price-lines div { display: flex; justify-content: space-between; gap: 1rem; }
.price-lines .total { color: var(--ink); font-weight: 600; border-top: 1px solid var(--line); padding-top: 0.35rem; margin-top: 0.15rem; }
.calc-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; }
.calc-note { font-size: 0.8rem; color: var(--muted); }
.msg { font-size: 0.88rem; padding: 0.55rem 0.7rem; border-radius: 3px; background: var(--ground); border-left: 3px solid var(--line-strong); }
.msg.ok { border-left-color: var(--ok); }
.msg.warn { border-left-color: var(--warn); }
.msg.err { border-left-color: var(--err); }
.calc-form { display: grid; gap: 0.75rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.summary { background: var(--ground); border-radius: 3px; padding: 0.8rem; font-family: var(--font-mono); font-size: 0.8rem; white-space: pre-wrap; word-break: break-word; }

/* FAQ */
.faq-group { display: grid; gap: 0.5rem; margin-bottom: 2rem; }
.faq-group h2 { font-size: 1.2rem; margin-bottom: 0.4rem; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
summary { cursor: pointer; padding: 0.85rem 1rem; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-family: var(--font-mono); }
details[open] summary::after { content: "–"; }
details .answer { padding: 0 1rem 1rem; color: var(--ink); max-width: 70ch; display: grid; gap: 0.5rem; }

/* Price table */
.price-table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); font-size: 0.95rem; }
.price-table th, .price-table td { padding: 0.65rem 0.8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.price-table th { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.price-table td.num, .price-table th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Callout / CTA band */
.band { background: var(--ink); color: #fff; padding-block: 2.5rem; }
.band .wrap { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.band h2 { color: #fff; font-size: 1.5rem; }
.band p { color: #C9CED9; }
.band .btn-primary { background: var(--accent); }

/* Footer */
.site-footer { background: var(--ink); color: #C9CED9; padding-block: 2.5rem 1.5rem; font-size: 0.9rem; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
.footer-grid h4 { color: #fff; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; font-family: var(--font-mono); font-weight: 500; margin-bottom: 0.6rem; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); padding-top: 1rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* Page header */
.page-head { padding-block: 3rem 2rem; display: grid; gap: 0.75rem; max-width: 64ch; }
.page-head .lead { font-size: 1.1rem; color: var(--muted); }
.two-col { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.two-col > *, .hero-grid > *, .grid-2 > *, .grid-3 > *, .grid-4 > * { min-width: 0; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }
.aside { display: grid; gap: 1rem; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 1rem; font-size: 0.92rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.badge { display: inline-block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.2rem 0.5rem; border: 1px solid var(--line-strong); border-radius: 3px; color: var(--muted); }
.badge.stock { border-color: var(--ok); color: var(--ok); }
.copy-btn { font: inherit; font-size: 0.85rem; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 3px; padding: 0.3rem 0.6rem; cursor: pointer; color: var(--ink); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }