/* IK-Industrieservice GmbH — statische Seite */
:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #555;
  --color-accent: #b30000;
  --color-accent-dark: #800000;
  --color-section: #f5f5f5;
  --color-border: #e4e4e4;
  --max-width: 1200px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 17px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

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

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.site-logo img { height: 56px; width: auto; }
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 0;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--color-accent);
  text-decoration: none;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  font-size: 1.5rem;
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none;
    width: 100%;
    margin-top: 0.75rem;
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0.25rem; }
  .header-inner { flex-wrap: wrap; }
}

/* Hero */
.hero {
  position: relative;
  width: 100%;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 2rem 1.25rem;
}
.hero-content h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin: 0 0 1rem;
  line-height: 1.2;
}
.hero-content p {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  margin: 0;
}

/* Sections */
section.block {
  padding: 3rem 1.25rem;
}
section.block.alt {
  background: var(--color-section);
}
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-title {
  text-align: center;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  margin: 0 0 2rem;
}

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  color: var(--color-accent);
}
.card p { margin: 0; color: var(--color-muted); }

/* Reference logos */
.refs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  align-items: center;
  justify-items: center;
}
.refs img {
  max-height: 90px;
  width: auto;
  filter: grayscale(20%);
  opacity: 0.9;
  transition: filter 0.2s, opacity 0.2s;
}
.refs img:hover { filter: none; opacity: 1; }

/* Content pages */
.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}
.page h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin: 0 0 1.5rem;
}
.page h2 {
  margin-top: 2rem;
  font-size: 1.4rem;
}
.page h3 {
  margin-top: 1.5rem;
  font-size: 1.15rem;
}
.page ul { padding-left: 1.2rem; }
.page li { margin: 0.25rem 0; }

/* Footer */
.site-footer {
  background: #1a1a1a;
  color: #ccc;
  padding: 2.5rem 1.25rem 1.5rem;
  margin-top: 2rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}
.footer-inner h4 {
  color: #fff;
  margin: 0 0 0.75rem;
  font-size: 1rem;
}
.footer-inner ul { list-style: none; padding: 0; margin: 0; }
.footer-inner li { margin: 0.25rem 0; }
.footer-inner a { color: #ccc; }
.footer-inner a:hover { color: #fff; }
.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid #333;
  font-size: 0.875rem;
  color: #999;
  text-align: center;
}