/* =====================================================================
   NetVortex KI-Lernwerkstatt — theme: Industrial Multi-Axis Robotic
   Welding Gantry (Layer C). Palette graphite/steel, amber accent,
   hairline axis grid, chamfered cards. Fonts: IBM Plex (OFL).
   ===================================================================== */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBM-Plex-Sans-latin-var.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/fonts/IBM-Plex-Serif-400-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Serif";
  src: url("/fonts/IBM-Plex-Serif-600-latin.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #14181d;
  --panel: #1d232a;
  --panel-2: #232a32;
  --steel: #2a3138;
  --line: #39424c;
  --line-soft: #2c343d;
  --text: #e8eaed;
  --muted: #9aa3ad;
  --accent: #f59e0b;
  --accent-strong: #d97706;
  --accent-ink: #1a1205;
  --ok: #34d399;
  --err: #f87171;
  --max: 1120px;
  --chamfer: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  --mono: "IBM Plex Sans", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }

.mono {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }

/* axis-grid backdrop motif */
.axis-grid {
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center;
}
.axis-dim { position: relative; }
.axis-dim::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(20, 24, 29, 0.55), var(--bg) 75%);
  pointer-events: none;
}
.axis-dim > * { position: relative; }

/* section labels, gantry-axis notation (decorative) */
.axis-label {
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 18px;
}
.axis-label::before {
  content: ""; width: 34px; height: 2px;
  background: var(--accent);
}
.axis-label .dot {
  width: 7px; height: 7px; background: var(--accent);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

/* ------------------------------------------------- header */
.topbar {
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel);
}
.topbar-in {
  display: flex; gap: 24px; justify-content: space-between;
  padding-top: 8px; padding-bottom: 8px;
}
.topbar-item a { color: var(--muted); }
.topbar-item a:hover { color: var(--accent); text-decoration: none; }

.navrow {
  position: sticky; top: 0; z-index: 40;
  background: rgba(20, 24, 29, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.navrow-in {
  display: flex; align-items: center; gap: 28px;
  min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 26px; height: 26px; flex: none;
  border: 2px solid var(--accent);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 62% 100%, 0 100%);
  background:
    linear-gradient(135deg, transparent 55%, var(--accent) 55%);
}
.brand-name {
  font-family: var(--mono);
  font-weight: 600; font-size: 0.95rem; letter-spacing: 0.04em;
  color: var(--text);
}
.brand-name em { font-style: normal; color: var(--muted); }

.nav {
  display: flex; align-items: center; gap: 26px; margin-left: auto;
}
.nav a { color: var(--text); font-size: 0.95rem; }
.nav a:hover { color: var(--accent); text-decoration: none; }
.nav-cta { white-space: nowrap; }

.nav-toggle {
  display: none; margin-left: auto;
  background: none; border: 1px solid var(--line);
  padding: 9px 10px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--text); margin: 4px 0;
}

@media (max-width: 860px) {
  .topbar-in { justify-content: center; }
  .topbar-item:first-child { display: none; }
  .nav-toggle { display: block; }
  .nav {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 16px;
  }
  .nav.nav-open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line-soft); }
  .nav .nav-cta { margin-top: 12px; text-align: center; border-bottom: none; }
}

/* ------------------------------------------------- buttons */
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 13px 26px;
  clip-path: var(--chamfer);
  cursor: pointer; border: 0;
}
.btn:hover { text-decoration: none; }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { background: var(--accent-strong); color: var(--accent-ink); }
.btn-outline {
  background: transparent; color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line);
}
.btn-outline:hover { box-shadow: inset 0 0 0 1px var(--accent); color: var(--accent); }

/* ------------------------------------------------- cards / panels */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--chamfer);
  padding: 28px;
}
.card h3 { margin-top: 0; }
.card .kicker {
  font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 10px; display: block;
}
.card p { color: var(--muted); margin: 0; }

.price-chip {
  display: inline-flex; align-items: baseline; gap: 8px;
  font-family: var(--mono);
  border: 1px solid var(--accent);
  padding: 8px 14px;
  background: rgba(245, 158, 11, 0.08);
}
.price-chip .amount { font-size: 1.3rem; font-weight: 600; color: var(--accent); }

/* ------------------------------------------------- hero (statement-full-width) */
.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}
.hero .statement {
  max-width: 880px;
}
.hero h1 .hl { color: var(--accent); }
.hero p.lede {
  font-size: 1.15rem; color: var(--muted); max-width: 720px;
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 16px; margin-top: 30px;
  align-items: center;
}
.hero-meta {
  margin-top: 34px; display: flex; flex-wrap: wrap; gap: 26px;
}
.hero-meta .item {
  border-left: 2px solid var(--accent);
  padding-left: 12px;
}
.hero-meta .item .mono { display: block; margin-bottom: 2px; }
.hero-media {
  margin-top: 56px;
  position: relative;
  border: 1px solid var(--line);
  clip-path: var(--chamfer);
  background: var(--panel);
  padding: 10px;
}
.hero-media img { width: 100%; height: auto; }
.hero-media .rail {
  position: absolute; top: 10px; left: 10px; right: 10px;
  height: 3px; background: var(--accent);
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 10px 100%);
  opacity: 0.85;
}

/* ------------------------------------------------- timeline-rail */
.timeline { position: relative; padding-left: 36px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px; background: var(--line);
}
.timeline-step {
  position: relative; padding-bottom: 34px;
}
.timeline-step:last-child { padding-bottom: 0; }
.timeline-step::before {
  content: ""; position: absolute; left: -36px; top: 4px;
  width: 18px; height: 18px;
  background: var(--bg);
  border: 2px solid var(--accent);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
.timeline-step .no {
  font-family: var(--mono); color: var(--accent);
  font-size: 0.78rem; letter-spacing: 0.1em;
}
.timeline-step p { color: var(--muted); margin: 6px 0 0; }

/* ------------------------------------------------- text-left-media-right */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: center;
}
.split .media {
  border: 1px solid var(--line);
  clip-path: var(--chamfer);
  padding: 10px;
  background: var(--panel);
}
.split .media img { width: 100%; height: auto; }
.split ul.checks { list-style: none; margin: 20px 0 0; padding: 0; }
.split ul.checks li {
  padding: 10px 0 10px 30px; position: relative;
  border-bottom: 1px solid var(--line-soft);
}
.split ul.checks li::before {
  content: ""; position: absolute; left: 4px; top: 17px;
  width: 12px; height: 7px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
@media (max-width: 860px) {
  .split { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}

/* ------------------------------------------------- full-bleed-band */
.band {
  position: relative;
  padding: 88px 0;
  background:
    linear-gradient(rgba(20, 24, 29, 0.88), rgba(20, 24, 29, 0.88)),
    url("/images/detail.jpg") center / cover no-repeat fixed;
}
.band .band-in { max-width: 780px; }
.band h2 .hl { color: var(--accent); }
@media (max-width: 860px) {
  .band { background-attachment: scroll; }
}

/* ------------------------------------------------- card row (plan) */
.card-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
@media (max-width: 960px) { .card-row { grid-template-columns: minmax(0, 1fr); } }

/* ------------------------------------------------- form */
.form-shell {
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--chamfer);
  padding: 32px;
  max-width: 640px;
}
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-family: var(--mono); font-size: 0.74rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 7px;
}
.field label .req { color: var(--accent); }
.field input, .field textarea, .field select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line);
  padding: 12px 14px;
  font: inherit; font-size: 0.95rem;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
}
.field .err {
  display: none;
  color: var(--err); font-size: 0.85rem; margin-top: 6px;
}
.field.invalid .err { display: block; }
.field.invalid input, .field.invalid textarea { border-color: var(--err); }
.hp { position: absolute; left: -9999px; opacity: 0; }
.form-state {
  display: none;
  margin-top: 18px; padding: 14px 16px;
  border: 1px solid var(--line);
  font-size: 0.95rem;
}
.form-state.is-error { display: block; border-color: var(--err); color: var(--err); }
.form-state.is-success { display: block; border-color: var(--ok); color: var(--ok); }
.form-note { margin-top: 14px; font-size: 0.85rem; color: var(--muted); }

/* ------------------------------------------------- prose (legal pages) */
.prose {
  max-width: 780px;
}
.prose h2 { font-size: 1.45rem; margin-top: 2.2em; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--text); }
.prose table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0;
  font-size: 0.92rem;
}
.prose th, .prose td {
  border: 1px solid var(--line); padding: 10px 12px;
  text-align: left; vertical-align: top;
}
.prose th { background: var(--panel); color: var(--text); }

/* ------------------------------------------------- page head */
.page-head {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 48px;
}

/* ------------------------------------------------- footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  margin-top: 72px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-top: 56px; padding-bottom: 40px;
}
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}
.footer-brand { color: var(--text); margin-bottom: 14px; }
.footer-col p { color: var(--muted); font-size: 0.92rem; margin: 0 0 10px; }
.footer-head { color: var(--accent); margin-bottom: 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 9px; }
.footer-col li a { color: var(--muted); font-size: 0.92rem; }
.footer-col li a:hover { color: var(--accent); }
.footer-base {
  border-top: 1px solid var(--line-soft);
}
.footer-base-in {
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between;
  padding-top: 18px; padding-bottom: 18px;
  font-size: 0.78rem;
}
.footer-base-in a { color: var(--muted); }
.footer-base-in a:hover { color: var(--accent); }

/* ------------------------------------------------- photo grade (site-wide) */
.grade {
  filter: grayscale(1) contrast(1.12);
}

/* ------------------------------------------------- skip link + a11y */
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; z-index: 100;
}
.skip:focus { left: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* weld-seam hairline detail (decorative, theme only) */
.seam {
  height: 1px;
  background: repeating-linear-gradient(90deg,
    var(--accent) 0 10px, transparent 10px 16px);
  opacity: 0.35;
  margin: 0 auto;
  max-width: var(--max);
}

/* ------------------------------------------------- additions */
[x-cloak] { display: none !important; }
.section.flush-top { padding-top: 0; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 36px; }
}
.contact-intro h2 { margin-top: 1.8em; }
.contact-intro p { color: var(--muted); }
.contact-intro .mono { margin-top: 10px; }

/* consent checkbox inside labelled field */
.consent-label {
  display: flex; gap: 10px; align-items: flex-start;
  font-family: inherit; font-size: 0.88rem;
  letter-spacing: 0; text-transform: none;
  color: var(--muted); line-height: 1.5;
  cursor: pointer;
}
.consent-label input[type="checkbox"] {
  width: 18px; height: 18px; margin-top: 2px; flex: none;
  accent-color: var(--accent);
}
.consent-label a { color: var(--accent); }

/* full-bleed band: grade the photo + overlay, theme-consistent */
.band { position: relative; isolation: isolate; }
.band::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  backdrop-filter: grayscale(1) contrast(1.12);
  background: rgba(20, 24, 29, 0.72);
}

/* captions under figures */
.hero-media figcaption,
.media figcaption {
  font-family: var(--mono);
  font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); padding: 12px 2px 2px;
}

/* remove consent-label uppercase override from .field label */
.field label.consent-label {
  text-transform: none; letter-spacing: 0;
  font-family: inherit; font-size: 0.88rem;
}