/* =========================================================
   IRS GmbH — Industrie-Roboter-Service
   Modern responsive stylesheet
   ========================================================= */

:root {
  --color-primary: #0f3d5c;        /* deep steel blue */
  --color-primary-dark: #0a2c42;
  --color-accent: #e07b1f;         /* robot orange */
  --color-accent-dark: #c96712;
  --color-text: #2c3e50;
  --color-muted: #5f7388;
  --color-bg: #f3f6f9;
  --color-bg-alt: #e8eef4;
  --color-white: #ffffff;
  --color-line: #d7e0e8;
  --radius: 10px;
  --shadow: 0 4px 16px rgba(15, 61, 92, 0.10);
  --shadow-lg: 0 10px 34px rgba(15, 61, 92, 0.16);
  --container: 1120px;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
               "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-head: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: var(--shadow);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
}
.brand-logo {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
  flex: 0 0 auto;
}
.brand-name { font-size: 1.35rem; font-weight: 700; line-height: 1.1; }
.brand-tag {
  font-size: 0.8rem;
  color: #cfe0ee;
  letter-spacing: 0.03em;
}
.header-contact {
  font-size: 0.9rem;
  color: #eaf2f8;
  text-align: right;
  line-height: 1.5;
}
.header-contact a { color: #fff; font-weight: 600; }

/* ---------- Nav ---------- */
.site-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.10);
}
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}
.site-nav li a {
  display: block;
  padding: 13px 16px;
  color: #e7eef5;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px 6px 0 0;
  transition: background 0.2s, color 0.2s;
}
.site-nav li a:hover,
.site-nav li a[aria-current="page"] {
  background: var(--color-accent);
  color: #fff;
}

/* ---------- Main ---------- */
.site-main { padding: 40px 0 56px; }

.page-head {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-line);
  padding: 22px 0;
  margin-bottom: 34px;
}
.breadcrumbs {
  font-size: 0.82rem;
  color: var(--color-muted, var(--color-text));
  margin-bottom: 6px;
}
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumbs li + li::before { content: "›"; margin-right: 6px; color: #9fb2c2; }
.breadcrumbs a { color: var(--color-primary); }
.breadcrumbs [aria-current] { color: var(--color-muted, #6a7f92); }

/* ---------- Components ---------- */
.lead {
  font-size: 1.12rem;
  color: var(--color-primary-dark);
  font-weight: 500;
}
.intro { font-size: 1.05rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 26px 0;
}
.card-item {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-item h3 { margin-top: 0; font-size: 1.1rem; }
.card-item .icon {
  font-size: 1.9rem;
  line-height: 1;
  margin-bottom: 12px;
  display: inline-block;
}

.callout {
  background: var(--color-white);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}
.callout h3 { margin-top: 0; color: var(--color-accent-dark); }

.cta-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 28px 26px;
  margin: 30px 0 0;
  text-align: center;
}
.cta-box h2, .cta-box p { color: #fff; }
.cta-box .btn-light {
  display: inline-block;
  margin-top: 8px;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 26px;
  border-radius: 30px;
  font-weight: 700;
}
.cta-box .btn-light:hover { background: var(--color-accent-dark); }

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 11px 22px;
  border-radius: 6px;
  font-weight: 600;
}
.btn:hover { background: var(--color-accent); color: #fff; }

/* lists */
ul.clean { padding-left: 20px; }
ul.clean li { margin-bottom: 6px; }
ul.check { list-style: none; padding-left: 0; }
ul.check li { padding-left: 28px; position: relative; margin-bottom: 8px; }
ul.check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* tables */
table.data {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 20px 0;
}
table.data th, table.data td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
}
table.data th { background: var(--color-bg-alt, var(--color-bg)); color: var(--color-primary-dark); }

/* gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.gallery a { display: block; background: #fff; border-radius: 8px; padding: 6px; border: 1px solid var(--color-line); }
.gallery img { width: 100%; border-radius: 6px; }

/* figure */
figure { margin: 22px 0; text-align: center; }
figcaption { font-size: 0.85rem; color: var(--color-muted, #6a7a8b); margin-top: 6px; }

/* logos row */
.logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 22px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}
.logos img { filter: grayscale(1); opacity: 0.85; max-height: 46px; }
.note { font-size: 0.8rem; color: var(--color-muted, #7b8a99); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: #cddbe8;
  font-size: 0.9rem;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  padding: 40px 0 24px;
}
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: #cfe0ee; }
.site-footer a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding: 16px 0;
  text-align: center;
  font-size: 0.82rem;
  color: #9fb3c6;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 8px 14px;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .header-top { flex-direction: column; align-items: flex-start; }
  .header-contact { text-align: left; }
  .site-nav ul { flex-direction: column; }
  .site-nav li a { border-radius: 6px; }
  .card-grid { grid-template-columns: 1fr; }
  .site-main { padding: 26px 0 40px; }
}

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