/* ==========================================================================
   BEK Elektrotechnik – Stylesheet
   Farben, Schriftgrößen und Abstände zentral hier anpassen.
   ========================================================================== */

:root {
  /* --- Farben, abgeleitet aus dem Logo (Schwarz / Rot) --- */
  --ink:        #0d1116;   /* Schwarz, dunkler Hintergrund */
  --ink-soft:   #171d24;   /* dunkle Flächen, Karten auf Dunkel */
  --ink-line:   #2a333c;   /* Linien auf dunklem Grund */
  --text:       #1a2027;   /* Fließtext auf Hell */
  --text-mute:  #5c6672;   /* Sekundärtext */
  --text-inv:   #eef1f4;   /* Text auf Dunkel */
  --accent:     #d50002;   /* Logo-Rot */
  --accent-dk:  #a80002;   /* dunkleres Rot für Hover und Kleintext */
  --accent-lt:  #ff4d4a;   /* helleres Rot – nur auf dunklem Grund lesbar */
  --bg:         #ffffff;
  --bg-alt:     #f4f5f7;   /* helle Sektionsflächen */
  --line:       #e2e5e9;

  --radius:     14px;
  --radius-sm:  8px;
  --shadow:     0 1px 2px rgba(15,21,28,.05), 0 8px 24px rgba(15,21,28,.06);
  --shadow-lg:  0 2px 4px rgba(15,21,28,.06), 0 18px 48px rgba(15,21,28,.12);

  --maxw:       1140px;
  --gap:        clamp(1.5rem, 4vw, 3rem);
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

/* --- Reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 700;
  color: var(--ink);
}
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.35rem); }
h3 { font-size: 1.16rem; }
p  { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

/* --- Layout --------------------------------------------------------------- */
.container {
  width: min(100% - 2.5rem, var(--maxw));
  margin-inline: auto;
}
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--ink); color: var(--text-inv); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }
.section--tight { padding-block: clamp(2.5rem, 5vw, 3.5rem); }

.section-head { max-width: 60ch; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-dk);
  margin-bottom: .9rem;
}
.section--dark .eyebrow { color: var(--accent-lt); }

.lead { font-size: clamp(1.05rem, 2vw, 1.2rem); color: var(--text-mute); }
.section--dark .lead { color: #b6c2cd; }

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1.5rem;
  border: 2px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  font-size: .98rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.section--dark .btn:focus-visible, .hero .btn:focus-visible { outline-color: var(--accent-lt); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dk); }
.btn--ghost { border-color: currentColor; color: var(--ink); }
.section--dark .btn--ghost,
.hero .btn--ghost { color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.08); }
.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

/* --- Kopfbereich / Navigation --------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 74px;
}

/* Logo. assets/img/logo.png für helle Flächen,
   assets/img/logo-invers.png für den dunklen Fußbereich. */
.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.logo-img { height: 54px; width: auto; }
.site-footer .logo-img { height: 66px; }
@media (max-width: 480px) { .logo-img { height: 42px; } }

.nav-links { display: flex; align-items: center; gap: .35rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block;
  padding: .55rem .85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: .97rem;
  color: var(--text);
}
.nav-links a:hover { background: var(--bg-alt); }
.nav-links a[aria-current="page"] { color: var(--accent-dk); }
.nav-cta { margin-left: .5rem; }
.nav-cta a[aria-current="page"] { color: var(--ink); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 20px; height: 2px; background: var(--ink);
  margin-inline: auto; border-radius: 2px; transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: relative; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top: 4px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-4px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    inset: 74px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: .6rem 1.25rem 1.4rem;
    box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: .85rem .2rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav-cta { margin: .9rem 0 0; }
  .nav-cta .btn { width: 100%; justify-content: center; }
}

/* --- Hero ----------------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--text-inv);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 420px at 82% 18%, rgba(213,0,2,.30), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.05), transparent 40%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 1;
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3.5rem, 8vw, 6rem);
  max-width: 66ch;
}
.hero h1 { color: #fff; }
.hero .lead { color: #c2ccd6; font-size: clamp(1.08rem, 2.2vw, 1.28rem); }
.hero--sub .hero__inner { padding-block: clamp(2.6rem, 6vw, 4.2rem); }

.hero-badges { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem; list-style: none; padding: 0; }
.hero-badges li {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .45rem .9rem;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  font-size: .87rem; font-weight: 600; color: #d6dee6;
}
.hero-badges svg { width: 15px; height: 15px; color: var(--accent-lt); flex: none; }

/* Breadcrumb */
.crumb { font-size: .85rem; color: #94a3af; margin-bottom: 1rem; }
.crumb a { color: #94a3af; text-decoration: none; }
.crumb a:hover { color: var(--accent-lt); }

/* --- Karten / Raster ------------------------------------------------------ */
.grid { display: grid; gap: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: #d3dae1; }
.card p { color: var(--text-mute); font-size: .97rem; }
.card__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(213,0,2,.10);
  color: var(--accent);
  margin-bottom: 1.1rem;
}
.card__icon svg { width: 24px; height: 24px; }

/* Werteliste */
.values { list-style: none; margin: 0; padding: 0; display: grid; gap: .85rem; }
.values li {
  display: flex; align-items: flex-start; gap: .8rem;
  font-weight: 600;
}
.values svg { width: 22px; height: 22px; flex: none; color: var(--accent); margin-top: .18rem; }
.section--dark .values svg { color: var(--accent-lt); }

/* Aufzählung mit Häkchen (helle Fläche) */
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; }
.checklist li { display: flex; align-items: flex-start; gap: .7rem; }
.checklist svg { width: 20px; height: 20px; flex: none; color: var(--accent-dk); margin-top: .3rem; }

/* Kennzahlen */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1.25rem; }
.stat { border-left: 3px solid var(--accent); padding-left: 1.1rem; }
.section--dark .stat { border-left-color: var(--accent-lt); }
.stat b { display: block; font-size: 1.9rem; line-height: 1.1; color: var(--ink); }
.section--dark .stat b { color: #fff; }
.stat span { font-size: .92rem; color: var(--text-mute); }
.section--dark .stat span { color: #aab6c1; }

/* Zwei-Spalten-Textblock */
.split { display: grid; gap: clamp(2rem, 5vw, 3.5rem); grid-template-columns: 1fr; align-items: start; }
@media (min-width: 860px) { .split { grid-template-columns: 1.15fr .85fr; } }

.panel {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
}
.section--alt .panel { background: #fff; }

/* --- Call-to-Action-Band -------------------------------------------------- */
.cta-band {
  background: var(--accent);
  color: #fff;
  padding: clamp(2.5rem, 6vw, 3.6rem) 0;
}
.cta-band h2 { color: #fff; margin-bottom: .35rem; }
.cta-band p { color: #ffd9d8; font-weight: 600; }
.cta-band .inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.cta-band .btn--dark { background: var(--ink); color: #fff; }
.cta-band .btn--dark:hover { background: #000; }

/* --- Kontakt -------------------------------------------------------------- */
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.1rem; }
.contact-list li { display: flex; gap: .9rem; align-items: flex-start; }
.contact-list svg { width: 22px; height: 22px; color: var(--accent-dk); flex: none; margin-top: .25rem; }
.contact-list b { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-mute); }
.contact-list a { text-decoration: none; font-weight: 600; }
.contact-list a:hover { text-decoration: underline; }

.form { display: grid; gap: 1rem; }
.field { display: grid; gap: .4rem; }
.field label { font-weight: 600; font-size: .93rem; }
.field .req { color: #c0392b; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: .8rem .9rem;
  font: inherit;
  font-size: .97rem;
  color: var(--text);
  background: #fff;
  border: 1px solid #cfd7de;
  border-radius: var(--radius-sm);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(213,0,2,.20);
}
.field textarea { min-height: 150px; resize: vertical; }
.field-row { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .field-row { grid-template-columns: 1fr 1fr; } }
.consent { display: flex; gap: .7rem; align-items: flex-start; font-size: .9rem; color: var(--text-mute); }
.consent input { width: 18px; height: 18px; margin-top: .2rem; flex: none; }
.hp { position: absolute; left: -9999px; opacity: 0; }
.form-note { font-size: .85rem; color: var(--text-mute); }

.alert { padding: 1rem 1.1rem; border-radius: var(--radius-sm); font-weight: 600; font-size: .95rem; }
.alert--ok   { background: #e7f6ec; border: 1px solid #b6e0c4; color: #1e6b39; }
.alert--err  { background: #fdecea; border: 1px solid #f5c2bd; color: #a12a1c; }

/* --- Rechtstexte ---------------------------------------------------------- */
.prose { max-width: 78ch; }
.prose h2 { margin-top: 2.4rem; font-size: 1.45rem; }
.prose h3 { margin-top: 1.8rem; font-size: 1.08rem; }
.prose ul { padding-left: 1.2rem; color: var(--text-mute); }
.prose li { margin-bottom: .4rem; }
.prose a { color: var(--accent-dk); }

/* Platzhalter, die der Betreiber noch ersetzen muss */
.todo {
  background: #fff3cd;
  border-bottom: 2px dashed #c79a00;
  padding: 0 .25rem;
  font-weight: 700;
  color: #7a5600;
}

/* --- Fußbereich ----------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: #aeb9c4;
  padding: clamp(3rem, 6vw, 4.5rem) 0 1.8rem;
  font-size: .95rem;
}
.footer-grid { display: grid; gap: 2.2rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.site-footer h4 {
  color: #fff; font-size: .82rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 1rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.site-footer a { color: #aeb9c4; text-decoration: none; }
.site-footer a:hover { color: var(--accent-lt); }
.site-footer .logo { margin-bottom: 1.1rem; }
.footer-bottom {
  margin-top: 2.6rem; padding-top: 1.4rem;
  border-top: 1px solid var(--ink-line);
  display: flex; flex-wrap: wrap; gap: .8rem 1.5rem; justify-content: space-between;
  font-size: .88rem; color: #7d8b98;
}
.footer-bottom ul { display: flex; gap: 1.2rem; }

/* --- Barrierefreiheit / Sonstiges ----------------------------------------- */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: .8rem 1.2rem; font-weight: 700;
}
.skip-link:focus { left: 0; }

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

@media print {
  .site-header, .site-footer, .cta-band, .btn-row { display: none; }
  body { font-size: 12pt; }
}