/*
 * Filip Löt- und Kabelmontage — core stylesheet
 * Modern industrial B2B design system. Mobile-first. No framework.
 */

/* ---------------------------------------------------------------------- */
/* Design tokens                                                          */
/* ---------------------------------------------------------------------- */
:root {
  /* Anthracite / charcoal (dark surfaces) */
  --c-anthracite-900: #17191c;
  --c-anthracite-800: #1f2226;
  --c-anthracite-700: #2a2e33;
  --c-anthracite-600: #3a3f45;

  /* Steel-blue accent (precision engineering) */
  --c-accent-600: #1f5f82;
  --c-accent-500: #2d7fa8;
  --c-accent-400: #4d9dc4;
  --c-accent-300: #8dc3dd;

  /* Neutral light */
  --c-offwhite: #f5f5f3;
  --c-white: #ffffff;
  --c-ink: #1a1a1a;
  --c-ink-soft: #4a4f54;
  --c-border: #dcdcd8;

  /* Semantic */
  --c-success-bg: #e6f3ec;
  --c-success-fg: #1f6b45;
  --c-error-fg: #b3261e;

  /* Type */
  --font-head: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;

  --container-w: 1280px;
  --radius: 2px;

  --header-h: 76px;
}

/* ---------------------------------------------------------------------- */
/* Reset                                                                   */
/* ---------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--c-accent-600); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--c-anthracite-900);
  margin: 0 0 var(--space-3);
}
p { margin: 0 0 var(--space-3); }
button { font: inherit; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--c-accent-600);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-5); }
}

.btn {
  display: inline-block;
  border: 2px solid transparent;
  padding: 0.75em 1.5em;
  font-family: var(--font-head);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.875rem;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn--accent {
  background: var(--c-accent-500);
  color: #fff;
  border-color: var(--c-accent-500);
}
.btn--accent:hover { background: var(--c-accent-600); border-color: var(--c-accent-600); }
.btn--ghost {
  background: transparent;
  color: var(--c-anthracite-900);
  border-color: var(--c-border);
}
.btn--ghost:hover { border-color: var(--c-anthracite-900); }

/* ---------------------------------------------------------------------- */
/* Header + main nav                                                      */
/* ---------------------------------------------------------------------- */
.site-header {
  background: var(--c-anthracite-900);
  position: sticky;
  top: 0;
  z-index: 500;
  border-bottom: 3px solid var(--c-accent-500);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-3);
}
.site-logo { display: inline-flex; align-items: center; padding: var(--space-2) 0; }
.site-logo img { height: 44px; width: auto; background: #fff; padding: 2px; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  border: 1px solid var(--c-anthracite-600);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  position: relative;
  transition: transform .2s ease;
}
.nav-toggle__bars::before { position: absolute; top: -6px; }
.nav-toggle__bars::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.main-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--c-anthracite-800);
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .15s ease, transform .15s ease, visibility 0s linear .15s;
}
.main-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: opacity .15s ease, transform .15s ease;
}
.main-nav__list { padding: var(--space-3); }
.main-nav__item { border-bottom: 1px solid var(--c-anthracite-700); }
.main-nav__item > a,
.main-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  color: #fff;
  text-align: left;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  padding: var(--space-3) var(--space-2);
  cursor: pointer;
}
.main-nav__item > a:hover,
.main-nav__link:hover { color: var(--c-accent-300); text-decoration: none; }
.main-nav__caret { transition: transform .15s ease; }
.main-nav__link[aria-expanded="true"] .main-nav__caret { transform: rotate(180deg); }

/* Megamenu: mobile = simple accordion panel under the trigger */
.megamenu {
  background: var(--c-anthracite-700);
  padding: var(--space-3);
}
.megamenu[hidden] { display: none; }
.megamenu__photo { display: none; }
.megamenu__lead {
  font-family: var(--font-head);
  color: var(--c-accent-300);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}
.megamenu__links li + li { margin-top: var(--space-1); }
.megamenu__links a {
  color: #fff;
  display: inline-block;
  padding: var(--space-1) 0;
}
.megamenu__links a:hover { color: var(--c-accent-300); }
.megamenu__all {
  display: inline-block;
  margin-top: var(--space-3);
  color: var(--c-accent-300);
  font-weight: 600;
}

@media (min-width: 960px) {
  .nav-toggle { display: none; }

  .main-nav {
    position: static;
    inset: auto;
    background: none;
    overflow: visible;
    transform: none;
    opacity: 1;
    visibility: visible;
    transition: none;
  }
  .main-nav__list {
    display: flex;
    align-items: stretch;
    padding: 0;
  }
  .main-nav__item {
    border-bottom: none;
    position: relative;
  }
  .main-nav__item > a,
  .main-nav__link {
    height: var(--header-h);
    padding: 0 var(--space-3);
    font-size: 0.95rem;
  }

  /* Full-viewport-width megamenu panel, anchored below the header */
  .megamenu {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    width: 100vw;
    background: var(--c-anthracite-800);
    border-top: 1px solid var(--c-anthracite-600);
    border-bottom: 3px solid var(--c-accent-500);
    box-shadow: 0 16px 32px rgba(0,0,0,.35);
  }
  .megamenu[hidden] { display: none; }

  .megamenu__inner {
    display: grid;
    grid-template-columns: minmax(280px, 380px) 1fr;
    gap: var(--space-6);
    padding: var(--space-5) var(--space-5);
    min-height: 320px;
  }
  .megamenu__photo {
    display: block;
    height: 100%;
    min-height: 280px;
    overflow: hidden;
    border-radius: var(--radius);
  }
  .megamenu__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .megamenu__nav { display: flex; flex-direction: column; justify-content: center; }
  .megamenu__links { columns: 2; column-gap: var(--space-5); }
  .megamenu__links a { font-size: 1.1rem; }
}

/* ---------------------------------------------------------------------- */
/* Hero                                                                    */
/* ---------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  background-color: var(--c-anthracite-900);
  background-size: cover;
  background-position: center;
  color: #fff;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(23,25,28,.92) 0%, rgba(23,25,28,.55) 55%, rgba(23,25,28,.25) 100%);
}
.hero__content {
  position: relative;
  padding-block: var(--space-6) var(--space-6);
  max-width: 760px;
}
.hero__eyebrow {
  font-family: var(--font-head);
  color: var(--c-accent-300);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
  margin-bottom: var(--space-2);
}
.hero__headline {
  color: #fff;
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: var(--space-3);
}
.hero__subline { font-size: 1.1rem; max-width: 60ch; color: #e7e7e5; }

/* ---------------------------------------------------------------------- */
/* Teaser grid                                                             */
/* ---------------------------------------------------------------------- */
.teaser-grid-section { padding-block: var(--space-6); }
.teaser-grid-section__headline {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  margin-bottom: var(--space-5);
}
.teaser-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .teaser-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1080px) {
  .teaser-grid { grid-template-columns: repeat(4, 1fr); }
}
.teaser-card {
  display: block;
  color: var(--c-ink);
  background: var(--c-offwhite);
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-accent-500);
  overflow: hidden;
  transition: transform .15s ease, box-shadow .15s ease;
}
.teaser-card:hover {
  text-decoration: none;
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,.12);
}
.teaser-card__media { aspect-ratio: 4 / 3; overflow: hidden; }
.teaser-card__media img { width: 100%; height: 100%; object-fit: cover; }
.teaser-card__body { padding: var(--space-4); }
.teaser-card__body h3 { font-size: 1.15rem; margin-bottom: var(--space-2); }
.teaser-card__body p { color: var(--c-ink-soft); font-size: 0.95rem; }
.teaser-card__link { color: var(--c-accent-600); font-weight: 700; font-size: 0.9rem; }

/* ---------------------------------------------------------------------- */
/* Standard content pages                                                  */
/* ---------------------------------------------------------------------- */
.main--standard { background: var(--c-white); }
.content-page { padding-block: var(--space-5) var(--space-7); max-width: 900px; }
.content-page__head { margin-bottom: var(--space-4); }
.content-page__head h1 { font-size: clamp(1.8rem, 5vw, 2.75rem); }
.breadcrumb { font-size: 0.85rem; color: var(--c-ink-soft); margin-bottom: var(--space-2); }
.breadcrumb a { color: var(--c-ink-soft); }
.breadcrumb__sep { margin: 0 var(--space-1); }
.content-block { font-size: 1.05rem; color: var(--c-ink); }

/* ---------------------------------------------------------------------- */
/* Trust / stats markers                                                   */
/* ---------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-6);
  background: var(--c-anthracite-900);
  color: #fff;
}
@media (min-width: 768px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stats__item { text-align: center; padding: var(--space-3); }
.stats__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--c-accent-400);
  display: block;
}
.stats__label { font-size: 0.9rem; color: #cfcfcc; text-transform: uppercase; letter-spacing: 0.05em; }

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */
.site-footer { background: var(--c-anthracite-900); color: #cfcfcc; }
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  padding-block: var(--space-6);
}
@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }
}
.site-footer h2, .site-footer h3 { color: #fff; }
.site-footer__logo { font-size: 1.3rem; }
.site-footer__logo span { color: var(--c-accent-300); font-weight: 400; }
.site-footer a { color: #cfcfcc; }
.site-footer a:hover { color: var(--c-accent-300); }
.site-footer__links li + li { margin-top: var(--space-1); }
.site-footer__bottom {
  border-top: 1px solid var(--c-anthracite-700);
  padding-block: var(--space-3);
  font-size: 0.85rem;
}

/* ---------------------------------------------------------------------- */
/* YForm base field styling (rex-yform bootstrap ytemplate output)         */
/* ---------------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-4); }
.control-label {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: var(--space-1);
}
.form-control {
  width: 100%;
  padding: 0.7em 0.9em;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font: inherit;
  background: #fff;
  color: var(--c-ink);
}
.form-control:focus {
  outline: none;
  border-color: var(--c-accent-500);
  box-shadow: 0 0 0 3px rgba(45,127,168,.2);
}
textarea.form-control { min-height: 8em; resize: vertical; }
.help-block { font-size: 0.8rem; color: var(--c-ink-soft); margin-top: var(--space-1); }
.text-warning { color: var(--c-error-fg); }
.alert.alert-danger {
  background: #fdecea;
  border: 1px solid #f5c2c0;
  color: var(--c-error-fg);
  padding: var(--space-3);
  margin-bottom: var(--space-4);
}
.alert.alert-danger ul { list-style: disc; padding-left: 1.2em; }

/* choice / radio tiles */
.form-check-group { display: contents; }
.funnel-tiles .form-check-group { display: contents; }
.funnel-tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 640px) {
  .funnel-tiles { grid-template-columns: repeat(2, 1fr); }
}
.funnel-tiles .radio {
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease;
}
.funnel-tiles .radio label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-weight: 600;
}
.funnel-tiles .radio.is-checked,
.funnel-tiles .radio:has(input:checked) {
  border-color: var(--c-accent-500);
  background: #eef6fa;
}

/* ---------------------------------------------------------------------- */
/* Funnel (multi-step Kontakt form)                                        */
/* ---------------------------------------------------------------------- */
.funnel-wrap { padding-block: var(--space-4) var(--space-7); }
.funnel-intro { max-width: 60ch; }

.funnel-progress { margin-bottom: var(--space-5); }
.funnel-progress__bar {
  height: 6px;
  background: var(--c-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--space-2);
}
.funnel-progress__fill {
  display: block;
  height: 100%;
  background: var(--c-accent-500);
  transition: width .2s ease;
}
.funnel-progress__steps {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--c-ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.funnel-progress__steps li { display: flex; align-items: center; gap: var(--space-1); }
.funnel-progress__steps li.is-active { color: var(--c-anthracite-900); font-weight: 700; }
.funnel-progress__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5em;
  height: 1.5em;
  border-radius: 50%;
  background: var(--c-border);
  font-weight: 700;
}
.funnel-progress__steps li.is-active .funnel-progress__num {
  background: var(--c-accent-500);
  color: #fff;
}

.funnel-form { border: none; padding: 0; margin: 0; }
.funnel-step { border: none; padding: 0; margin: 0; }
.funnel-step:not(.is-active) { display: none; }
.funnel-step__title { font-family: var(--font-head); font-weight: 800; font-size: 1.3rem; margin-bottom: var(--space-4); padding: 0; }

.funnel-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  gap: var(--space-3);
}

.funnel-summary { background: var(--c-offwhite); border: 1px solid var(--c-border); padding: var(--space-3); margin-bottom: var(--space-4); font-size: 0.9rem; }
.funnel-summary:empty { display: none; }
.funnel-summary dl { display: grid; grid-template-columns: auto 1fr; gap: var(--space-1) var(--space-3); margin: 0; }
.funnel-summary dt { font-weight: 700; }

.funnel-success {
  background: var(--c-success-bg);
  color: var(--c-success-fg);
  border: 1px solid #b9ddc7;
  padding: var(--space-4);
  border-radius: var(--radius);
}

/* honeypot field must stay visually hidden but present in DOM */