/* ==========================================================================
   HFW GmbH – Stahl, Industriemesser, Reißzähne & Verschleißteile
   Design-System: Industrie / Recycling / Grün / Stahl
   ========================================================================== */

:root {
  /* Farben */
  --c-dark: #11201c;
  --c-dark-2: #16302a;
  --c-green-900: #0f3d2c;
  --c-green-700: #1f6b45;
  --c-green-600: #257a4f;
  --c-green-500: #2f8f58;
  --c-green-accent: #5cb85c;
  --c-steel-700: #3c454c;
  --c-steel-500: #5b6670;
  --c-steel-300: #8993a0;
  --c-steel-100: #d7dde1;
  --c-bg: #f5f7f6;
  --c-bg-alt: #eef2ef;
  --c-white: #ffffff;
  --c-text: #1b2024;
  --c-text-muted: #525c61;
  --c-border: #dde3e0;
  --c-warn-bg: #fff7e6;
  --c-warn-border: #e8c47a;

  /* Typografie */
  --font-base: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-head: var(--font-base);

  /* Layout */
  --container: 1240px;
  --radius-sm: 3px;
  --radius-md: 6px;
  --shadow-card: 0 2px 10px rgba(17, 32, 28, 0.08);
  --shadow-lift: 0 14px 34px rgba(17, 32, 28, 0.16);
}

/* ---- Reset / Basis ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-green-700); text-decoration: none; }
a:hover { color: var(--c-green-500); }
h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--c-dark);
  line-height: 1.22;
  margin: 0 0 0.5em;
  font-weight: 800;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3.1rem); }
h2 { font-size: clamp(1.55rem, 1.3rem + 1.1vw, 2.2rem); }
h3 { font-size: 1.28rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.25em; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--alt { background: var(--c-bg-alt); }
.section--dark { background: var(--c-dark); color: #cfd8d3; }
.section--dark h2, .section--dark h3 { color: var(--c-white); }
.section--green { background: linear-gradient(135deg, var(--c-green-900), var(--c-green-700)); color: #e7f3ec; }
.section--green h2 { color: var(--c-white); }
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--c-green-700); color: #fff; padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---- Eyebrow / Kicker ---- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-green-600); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--c-green-accent); display: inline-block; }
.section--dark .eyebrow, .section--green .eyebrow { color: var(--c-green-accent); }

.lead { font-size: 1.12rem; color: var(--c-text-muted); max-width: 760px; }
.section--dark .lead, .section--green .lead { color: #d7e6dd; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-size: 0.95rem; padding: 13px 24px;
  border-radius: var(--radius-sm); border: 2px solid transparent;
  cursor: pointer; transition: all 0.15s ease; line-height: 1.2; text-align: center;
}
.btn--primary { background: var(--c-green-accent); color: #0d1f15; border-color: var(--c-green-accent); }
.btn--primary:hover { background: #71c771; border-color: #71c771; color: #0d1f15; }
.btn--secondary { background: transparent; color: var(--c-white); border-color: rgba(255,255,255,0.55); }
.btn--secondary:hover { border-color: var(--c-white); background: rgba(255,255,255,0.08); }
.btn--outline-dark { background: transparent; color: var(--c-dark); border-color: var(--c-steel-300); }
.btn--outline-dark:hover { border-color: var(--c-green-700); color: var(--c-green-700); }
.btn--block { width: 100%; }
.btn--lg { padding: 16px 30px; font-size: 1.02rem; }

/* ---- Header / Navigation ---- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--c-dark); border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 20px;
}
.logo { display: flex; flex-direction: column; line-height: 1; gap: 4px; }
.logo__mark {
  font-size: 1.5rem; font-weight: 800; letter-spacing: 0.03em; color: var(--c-white);
}
.logo__mark span { color: var(--c-green-accent); }
.logo__sub { font-size: 0.66rem; letter-spacing: 0.04em; color: var(--c-steel-300); text-transform: uppercase; }
.logo__img { height: 46px; width: auto; display: block; }
/* Weiße Logo-Leiste über volle Breite (Höhe = Logohöhe) */
.logo-bar { background: #fff; width: 100%; }
.logo-bar .container { padding-top: 9px; padding-bottom: 9px; }
.logo-bar .logo { flex-direction: row; align-items: center; gap: 14px; }
.logo-bar .logo__sub { color: var(--c-steel-500); }
/* Footer-Logo im weißen Kasten */
.footer__brand .logo__img--footer { height: 42px; background: #fff; padding: 8px 14px; border-radius: 6px; box-sizing: content-box; }
@media (max-width: 600px) { .logo__img { height: 38px; } }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 36px; background: none; border: 1px solid rgba(255,255,255,0.25); border-radius: var(--radius-sm); cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: #fff; margin: 0 auto; }

.nav { display: flex; align-items: center; gap: 22px; }
.nav__list { display: flex; gap: 20px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.nav__list a {
  color: #d7ded9; font-size: 0.92rem; font-weight: 600; padding: 8px 2px; position: relative;
}
.nav__list a:hover, .nav__list a.is-active { color: var(--c-white); }
.nav__list a.is-active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--c-green-accent);
}
.nav__cta { white-space: nowrap; }

@media (max-width: 980px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 64px 0 0 0; background: var(--c-dark);
    flex-direction: column; align-items: stretch; padding: 24px; gap: 20px;
    transform: translateY(-12px); opacity: 0; visibility: hidden; transition: all 0.18s ease;
    overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; gap: 4px; }
  .nav__list a { display: block; padding: 12px 4px; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .nav__cta { text-align: center; }
}

.breadcrumb { font-size: 0.82rem; color: var(--c-steel-500); padding: 14px 0; }
.breadcrumb a { color: var(--c-steel-500); }
.breadcrumb a:hover { color: var(--c-green-700); }
.breadcrumb__sep { margin: 0 6px; }

/* ---- Hero ---- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: linear-gradient(135deg, #0e1d18 0%, #163d2c 60%, #1c4f37 100%);
}
.hero__bg {
  position: absolute; inset: 0; object-fit: cover; width: 100%; height: 100%; opacity: 0.28; z-index: 0;
}
.hero::after {
  content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(10,20,17,0.92) 18%, rgba(10,20,17,0.55) 60%, rgba(10,20,17,0.25) 100%); z-index: 0;
}
.hero__inner { position: relative; z-index: 1; padding: 86px 0 70px; max-width: 720px; }
.hero--page { padding-top: 0; }
.hero--page .hero__inner { padding: 54px 0 46px; max-width: 800px; }
.hero h1 { color: #fff; max-width: 720px; }
.hero__lead { font-size: 1.15rem; color: #d8e6de; max-width: 720px; }
.hero__actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero__facts { display: flex; gap: 28px; margin-top: 40px; flex-wrap: wrap; }
.hero__fact strong { display: block; font-size: 1.5rem; color: var(--c-green-accent); }
.hero__fact span { font-size: 0.82rem; color: #c4d2ca; }

/* ---- Grids / Cards ---- */
.grid { display: grid; gap: 26px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.card {
  background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius-md);
  padding: 26px; box-shadow: var(--shadow-card); display: flex; flex-direction: column; gap: 10px;
}
.card h3 { margin-bottom: 4px; }
.card__icon {
  width: 46px; height: 46px; border-radius: var(--radius-sm); background: var(--c-green-900);
  display: flex; align-items: center; justify-content: center; color: var(--c-green-accent); margin-bottom: 6px;
}
.card__icon svg { width: 24px; height: 24px; }
.card__link { margin-top: auto; font-weight: 700; font-size: 0.9rem; }

.product-card {
  background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-card); display: flex; flex-direction: column;
}
.product-card__media {
  aspect-ratio: 4 / 3; background: var(--c-bg-alt); display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.product-card__media img { width: 100%; height: 100%; object-fit: contain; padding: 14px; }
.product-card__body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-card__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 10px; }
.tag {
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em;
  background: var(--c-bg-alt); color: var(--c-steel-700); padding: 4px 9px; border-radius: 999px; border: 1px solid var(--c-border);
}

.icon-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.icon-list li { display: flex; gap: 10px; align-items: flex-start; }
.icon-list li::before {
  content: ""; flex: none; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%;
  background: var(--c-green-700); position: relative;
}
.icon-list li::after {
  content: "✓"; position: absolute; color: #fff; font-size: 11px; font-weight: 900;
  left: 28px; margin-top: 3px; line-height: 18px;
}
.icon-list--plain li::before, .icon-list--plain li::after { content: none; }

.stat-row { display: flex; flex-wrap: wrap; gap: 36px; }
.stat { min-width: 140px; }
.stat strong { display: block; font-size: 2rem; color: var(--c-green-700); }
.stat span { color: var(--c-text-muted); font-size: 0.88rem; }
/* Bessere Lesbarkeit der Stat-Kacheln auf farbigen Sektionen */
.section--green .stat strong, .section--dark .stat strong { color: #ffffff; }
.section--green .stat span, .section--dark .stat span { color: #d3e6da; }

.split {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
}
.split--rev { grid-template-columns: 0.95fr 1.05fr; }
.split--rev .split__media { order: 2; }
@media (max-width: 860px) {
  .split, .split--rev { grid-template-columns: 1fr; }
  .split--rev .split__media { order: 0; }
}
.split__media img { border-radius: var(--radius-md); box-shadow: var(--shadow-card); }

/* ---- Tabelle (Werkstoffe) ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; min-width: 640px; background: var(--c-white); }
th, td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--c-border); font-size: 0.92rem; color: var(--c-text); }
thead th { background: var(--c-dark-2); color: #fff; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
/* Tabellen behalten dunklen Text auch in farbigen Sektionen (sonst weiß auf weiß) */
.section--green table, .section--dark table, .section--green td, .section--dark td { color: var(--c-text); }
.section--green thead th, .section--dark thead th { color: #fff; }
tbody tr:nth-child(even) { background: var(--c-bg-alt); }
tbody tr:hover { background: #e4efe8; }

/* ---- Prozess-Schritte ---- */
.steps { display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-top: 8px; }
.step__num {
  font-size: 0.78rem; font-weight: 800; color: var(--c-white); background: var(--c-green-700);
  width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}

/* ---- Hinweisbox ---- */
.callout {
  border-left: 4px solid var(--c-green-700); background: var(--c-bg-alt); padding: 20px 24px; border-radius: var(--radius-sm); margin: 28px 0;
}
.callout--warn { border-left-color: var(--c-warn-border); background: var(--c-warn-bg); }
.callout h4 { margin-bottom: 6px; }

/* ---- GEO Antwort-Box (für KI-Suchsysteme / Featured Snippets) ---- */
.answer-box {
  background: var(--c-white); border: 1px solid var(--c-border); border-left: 4px solid var(--c-green-accent);
  border-radius: var(--radius-sm); padding: 22px 26px; margin: 10px 0 30px;
}
.answer-box p:last-child { margin-bottom: 0; }
.answer-box strong { color: var(--c-dark); }

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(120deg, var(--c-green-900), var(--c-green-700));
  color: #fff; padding: 54px 0; text-align: center;
}
.cta-banner h2 { color: #fff; }
.cta-banner p { color: #d9ecdf; max-width: 640px; margin: 0 auto 26px; }
.cta-banner__actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ---- FAQ ---- */
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius-md); overflow: hidden;
}
.faq-item summary {
  cursor: pointer; padding: 18px 22px; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 14px; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 1.3rem; color: var(--c-green-700); flex: none; font-weight: 400;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { padding: 0 22px 20px; color: var(--c-text-muted); margin: 0; }
.faq-item + .faq-item { margin-top: 0; }

/* ---- Formular ---- */
.form-card {
  background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius-md);
  padding: 32px; box-shadow: var(--shadow-card);
}
fieldset { border: none; padding: 0; margin: 0 0 28px; }
fieldset legend {
  font-weight: 800; font-size: 1rem; color: var(--c-dark); padding: 0 0 14px; margin-bottom: 10px;
  border-bottom: 2px solid var(--c-bg-alt); width: 100%;
}
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 20px; }
.form-grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) { .form-grid, .form-grid--3 { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field--full { grid-column: 1 / -1; }
.form-field label { font-size: 0.86rem; font-weight: 700; color: var(--c-dark); }
.form-field .hint { font-size: 0.78rem; color: var(--c-text-muted); font-weight: 400; }
input, select, textarea {
  font-family: inherit; font-size: 0.96rem; padding: 11px 13px; border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); background: var(--c-bg); color: var(--c-text); width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--c-green-700); box-shadow: 0 0 0 3px rgba(31,107,69,0.15); background: #fff;
}
textarea { resize: vertical; min-height: 110px; }
.file-drop {
  border: 2px dashed var(--c-steel-300); border-radius: var(--radius-md); padding: 22px; text-align: center;
  background: var(--c-bg); cursor: pointer; transition: border-color .15s;
}
.file-drop:hover, .file-drop.is-dragover { border-color: var(--c-green-700); }
.file-drop input { display: none; }
.file-drop__filename { font-size: 0.85rem; color: var(--c-green-700); font-weight: 700; margin-top: 8px; }
.checkbox-field { display: flex; gap: 10px; align-items: flex-start; }
.checkbox-field input { width: auto; margin-top: 4px; }
.checkbox-field label { font-weight: 400; font-size: 0.88rem; color: var(--c-text-muted); }
.form-success {
  display: none; background: var(--c-green-900); color: #fff; padding: 22px 26px; border-radius: var(--radius-md); margin-bottom: 22px;
}
.form-success.is-visible { display: block; }
.required-note { font-size: 0.82rem; color: var(--c-text-muted); margin-top: -6px; margin-bottom: 18px; }

/* ---- Kontakt-Infoblock ---- */
.contact-info { display: grid; gap: 18px; }
.contact-info .card { gap: 6px; }

/* ---- Footer ---- */
.site-footer { background: var(--c-dark); color: #b9c4be; }
.footer__grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; padding: 56px 0 36px;
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; } }
.footer__brand p { color: #aebcb4; font-size: 0.9rem; }
.footer__note { font-size: 0.85rem; color: #8fa399; }
.site-footer h3 { color: #fff; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 14px; }
.footer__col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer__col a { color: #b9c4be; font-size: 0.92rem; }
.footer__col a:hover { color: var(--c-green-accent); }
.footer__contact address { font-style: normal; font-size: 0.92rem; line-height: 1.7; margin-bottom: 16px; color: #b9c4be; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08); padding: 18px 0; font-size: 0.8rem; color: #7e8c84;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.footer__bottom a { color: #7e8c84; }

/* ---- Utilities ---- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center-col { max-width: 760px; margin: 0 auto; }
.bg-img-cover { width: 100%; height: 100%; object-fit: cover; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
@media (max-width: 860px) {
  section { padding: 48px 0; }
  .footer__bottom { flex-direction: column; }
}