/* =========================================================
   VOLTARIK ELEKTROTECHNIK GMBH — STYLESHEET
   Design-Tokens: helle Fläche, elektrisches Blau + Spannungs-Gelb
   Display: Space Grotesk | Body: Inter | Utility: JetBrains Mono
   ========================================================= */

:root {
  /* Farben */
  --color-bg: #f6f8fb;
  --color-surface: #ffffff;
  --color-surface-alt: #eef2f9;
  --color-text: #11161f;
  --color-text-muted: #5b6472;
  --color-primary: #0e4de0;
  --color-primary-dark: #0a3aae;
  --color-primary-soft: #e7eefd;
  --color-accent: #ffc83c;
  --color-border: #e3e8ef;
  --color-success: #1f9d63;

  /* Typografie */
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", monospace;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(17, 22, 31, 0.06);
  --shadow-md: 0 8px 24px rgba(17, 22, 31, 0.08);
  --shadow-lg: 0 24px 48px rgba(17, 22, 31, 0.12);
  --transition: 200ms ease;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 4.5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; color: var(--color-text-muted); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  display: inline-block;
}

section { padding: 88px 0; }
@media (max-width: 720px) { section { padding: 56px 0; } }

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-accent {
  background: var(--color-accent);
  color: #16140a;
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 248, 251, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.topbar {
  display: flex;
  justify-content: flex-end;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  padding: 8px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.topbar a:hover { color: var(--color-primary); }

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}
.brand-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.brand-logo {
  height: 44px;
  width: auto;
}
.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
}

@media (max-width: 880px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    display: none;
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .topbar { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 96px;
  position: relative;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 920px) {
  .hero .container { grid-template-columns: 1fr; }
}
.hero h1 { margin-bottom: 18px; }
.hero p.lead {
  font-size: 1.1rem;
  max-width: 480px;
}
.hero-cta { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 44px;
  flex-wrap: wrap;
}
.hero-stat strong {
  font-family: var(--font-display);
  font-size: 1.6rem;
  display: block;
  color: var(--color-primary-dark);
}
.hero-stat span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Circuit signature graphic */
.circuit-wrap { position: relative; }
.circuit-wrap svg { width: 100%; height: auto; }
.circuit-line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 8 10;
  animation: dash 6s linear infinite;
}
.circuit-pulse {
  fill: var(--color-accent);
}
.circuit-node {
  fill: var(--color-surface);
  stroke: var(--color-primary);
  stroke-width: 2;
}
@keyframes dash { to { stroke-dashoffset: -180; } }
@media (prefers-reduced-motion: reduce) {
  .circuit-line { animation: none; }
}

/* ---------- Cards / Services ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 920px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.card-icon svg { width: 26px; height: 26px; stroke: var(--color-primary-dark); }
.card a.card-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- Split section (About) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 880px) { .split { grid-template-columns: 1fr; } }
.split-media {
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
  padding: 20px;
}

.checklist { list-style: none; padding: 0; margin: 20px 0; }
.checklist li {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--color-text);
}
.checklist svg { flex-shrink: 0; width: 20px; height: 20px; stroke: var(--color-success); margin-top: 2px; }

/* ---------- Stripe / band ---------- */
.band {
  background: var(--color-primary);
  color: #fff;
}
.band h2, .band p { color: #fff; }
.band p { color: rgba(255,255,255,0.85); }
.band-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

/* ---------- Logos / certifications ---------- */
.cert-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.cert-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.85rem;
  font-weight: 600;
}
.cert-pill svg { width: 18px; height: 18px; stroke: var(--color-primary); }

/* ---------- Projects ---------- */
.project-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.project-media {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-surface-alt), var(--color-primary-soft));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.project-body { padding: 22px; }
.tag-row { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- Forms ---------- */
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-row { margin-bottom: 18px; }
.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: #fff;
  color: var(--color-text);
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.form-two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 600px) { .form-two { grid-template-columns: 1fr; } }
.form-note { font-size: 0.8rem; color: var(--color-text-muted); }
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.alert-success { background: #e7f7ee; color: var(--color-success); border: 1px solid #bfe9d4; }
.alert-error { background: #fdecec; color: #b3261e; border: 1px solid #f6c9c7; }

/* ---------- Footer ---------- */
.site-footer {
  background: #0d1320;
  color: #c9d1e0;
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 {
  color: #fff;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.site-footer a { color: #c9d1e0; }
.site-footer a:hover { color: var(--color-accent); }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; font-size: 0.9rem; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: #7c87a1;
}
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand svg { width: 32px; height: 32px; }
.footer-logo-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #fff;
  flex-shrink: 0;
}
.footer-logo-chip img { width: 28px; height: auto; }
.footer-desc { font-size: 0.9rem; color: #95a0b8; max-width: 280px; }

/* ---------- Breadcrumb / page hero (Unterseiten) ---------- */
.page-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--color-primary); }

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex-wrap { flex-wrap: wrap; }