/* ==========================================================================
   Drei-S Premium — Design System
   Industrial Premium: Anthrazit/Graphit/Weiß + Industrie-Blau
   ========================================================================== */

:root {
  /* Primärfarben */
  --c-anthracite-900: #14171a;
  --c-anthracite-800: #1c2024;
  --c-graphite-700: #2a2f35;
  --c-graphite-600: #3a4048;
  --c-steel-500: #5b6570;
  --c-steel-400: #838d97;
  --c-steel-300: #b3bac1;
  --c-aluminium-200: #dde1e4;
  --c-cloud-100: #f2f4f5;
  --c-white: #ffffff;

  /* Akzentfarbe: Industrie-Blau */
  --c-blue-700: #0a4d9e;
  --c-blue-600: #0f62c4;
  --c-blue-500: #1976e0;
  --c-blue-400: #4c96ea;
  --c-blue-100: #e6f0fc;

  /* Semantik */
  --c-bg: var(--c-white);
  --c-bg-alt: var(--c-cloud-100);
  --c-bg-dark: var(--c-anthracite-900);
  --c-text: var(--c-anthracite-900);
  --c-text-muted: var(--c-steel-500);
  --c-text-on-dark: var(--c-white);
  --c-text-on-dark-muted: var(--c-steel-300);
  --c-border: var(--c-aluminium-200);
  --c-accent: var(--c-blue-600);
  --c-accent-hover: var(--c-blue-700);
  --c-focus: var(--c-blue-500);

  /* Typografie */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --fs-hero: clamp(2.75rem, 6vw, 5.5rem);
  --fs-h1: clamp(2.25rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.75rem, 3vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 2vw, 1.5rem);
  --fs-lead: clamp(1.125rem, 1.5vw, 1.375rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-tight: 1.1;
  --lh-heading: 1.2;
  --lh-body: 1.6;

  /* Abstände (8px-Basis) */
  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 4rem;
  --sp-7: 6rem;
  --sp-8: 9rem;

  /* Raster */
  --container-max: 1360px;
  --container-pad: clamp(1.25rem, 4vw, 3rem);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Bewegung */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 180ms;
  --dur-base: 320ms;
  --dur-slow: 600ms;

  --shadow-sm: 0 1px 2px rgba(20, 23, 26, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 23, 26, 0.08);
  --shadow-lg: 0 24px 64px rgba(20, 23, 26, 0.14);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

h1, h2, h3, h4 {
  margin: 0 0 var(--sp-2);
  line-height: var(--lh-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-h1); line-height: var(--lh-tight); font-weight: 700; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 var(--sp-2); color: var(--c-text-muted); max-width: 62ch; }

:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section { padding-block: var(--sp-7); }
.section--tight { padding-block: var(--sp-6); }
.section--dark { background: var(--c-bg-dark); color: var(--c-text-on-dark); }
.section--dark p { color: var(--c-text-on-dark-muted); }
.section--dark h2, .section--dark h3 { color: var(--c-text-on-dark); }
.section--alt { background: var(--c-bg-alt); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--sp-2);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-accent);
}

.section-head {
  max-width: 46rem;
  margin-bottom: var(--sp-5);
}
.section-head--center { margin-inline: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.95em 1.75em;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--c-accent); color: var(--c-white); }
.btn-primary:hover { background: var(--c-accent-hover); }
.btn-secondary { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn-secondary:hover { border-color: var(--c-text); }
.section--dark .btn-secondary,
.hero .btn-secondary { color: var(--c-white); border-color: rgba(255,255,255,0.3); }
.section--dark .btn-secondary:hover,
.hero .btn-secondary:hover { border-color: var(--c-white); }
.btn-ghost { background: transparent; color: var(--c-accent); padding-inline: 0; }
.btn-ghost::after { content: "→"; transition: transform var(--dur-fast) var(--ease); }
.btn-ghost:hover::after { transform: translateX(4px); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--c-border); }
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  height: 84px;
}
.site-logo { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.01em; }
.site-logo span { color: var(--c-accent); }
.main-nav { display: flex; gap: var(--sp-4); }
.main-nav ul { display: flex; gap: var(--sp-4); list-style: none; margin: 0; padding: 0; }
.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-text);
  padding-block: 0.5em;
  position: relative;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-fast) var(--ease);
}
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.header-actions { display: flex; align-items: center; gap: var(--sp-2); }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  color: var(--c-text); transition: background var(--dur-fast) var(--ease);
}
.icon-btn:hover { background: var(--c-bg-alt); }
.nav-toggle { display: none; }

@media (max-width: 960px) {
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  color: var(--c-white);
  overflow: hidden;
  background: var(--c-anthracite-900);
}
.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__media video, .hero__media img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,23,26,0.35) 0%, rgba(20,23,26,0.55) 55%, rgba(20,23,26,0.9) 100%);
}
.hero__content {
  position: relative; z-index: 1;
  padding-block: var(--sp-7) var(--sp-6);
  width: 100%;
}
.hero__kicker { color: var(--c-blue-400); }
.hero h1 { font-size: var(--fs-hero); max-width: 20ch; }
.hero__lead { font-size: var(--fs-lead); color: var(--c-text-on-dark-muted); max-width: 42ch; }
.hero__actions { display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-top: var(--sp-3); }
.hero__meta {
  display: flex; gap: var(--sp-5); margin-top: var(--sp-6);
  padding-top: var(--sp-3); border-top: 1px solid rgba(255,255,255,0.15);
  flex-wrap: wrap;
}
.hero__meta-item { font-size: var(--fs-small); color: var(--c-text-on-dark-muted); }
.hero__meta-item strong { display: block; font-size: 1.5rem; color: var(--c-white); font-weight: 700; }
.hero__scroll {
  position: absolute; right: var(--container-pad); bottom: var(--sp-4); z-index: 1;
  writing-mode: vertical-rl; font-size: var(--fs-small); color: var(--c-text-on-dark-muted);
  display: flex; align-items: center; gap: var(--sp-1);
}

/* ---------- Grids ---------- */
.grid { display: grid; gap: var(--sp-3); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Cards ---------- */
.card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }

.competence-card {
  padding: var(--sp-4);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-white);
}
.competence-card__icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  background: var(--c-blue-100); color: var(--c-accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--sp-2);
}

.product-card { display: flex; flex-direction: column; }
.product-card__media { aspect-ratio: 4/3; background: var(--c-bg-alt); overflow: hidden; }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease); }
.product-card:hover .product-card__media img { transform: scale(1.06); }
.product-card__body { padding: var(--sp-3); display: flex; flex-direction: column; gap: var(--sp-1); flex: 1; }
.product-card__tag { font-size: var(--fs-small); color: var(--c-accent); font-weight: 600; }
.product-card__foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: var(--sp-2); }

.industry-card {
  position: relative; aspect-ratio: 3/4; border-radius: var(--radius-md);
  overflow: hidden; color: var(--c-white); display: flex; align-items: flex-end;
}
.industry-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.industry-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,23,26,0) 40%, rgba(20,23,26,0.85) 100%);
}
.industry-card__label { position: relative; padding: var(--sp-3); font-weight: 600; }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
.stat__value { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; color: var(--c-accent); }
.stat__label { font-size: var(--fs-small); color: var(--c-text-on-dark-muted); }
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Process / Timeline ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); counter-reset: step; }
.process__step { border-top: 2px solid var(--c-border); padding-top: var(--sp-2); }
.process__step::before {
  counter-increment: step; content: "0" counter(step);
  display: block; font-size: var(--fs-small); color: var(--c-accent); font-weight: 700; margin-bottom: var(--sp-1);
}
@media (max-width: 960px) { .process { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .process { grid-template-columns: 1fr; } }

/* ---------- Forms ---------- */
.form-field { margin-bottom: var(--sp-2); display: flex; flex-direction: column; gap: 0.4em; }
.form-field label { font-size: var(--fs-small); font-weight: 600; }
.form-field input, .form-field select, .form-field textarea {
  font: inherit; padding: 0.85em 1em; border-radius: var(--radius-sm);
  border: 1px solid var(--c-border); background: var(--c-white); color: var(--c-text);
  transition: border-color var(--dur-fast) var(--ease);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: var(--c-accent); }
.form-field--error input { border-color: #c62828; }
.form-error { color: #c62828; font-size: var(--fs-small); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

/* ---------- Table (technical data) ---------- */
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td {
  text-align: left; padding: 0.85em 1em; border-bottom: 1px solid var(--c-border); font-size: 0.95rem;
}
.spec-table th { width: 40%; color: var(--c-text-muted); font-weight: 500; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-anthracite-900); color: var(--c-text-on-dark-muted); padding-top: var(--sp-6); }
.site-footer a:hover { color: var(--c-white); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: var(--sp-4); padding-bottom: var(--sp-5); }
.footer-grid h4 { color: var(--c-white); font-size: var(--fs-small); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--sp-2); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.6em; font-size: 0.95rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-block: var(--sp-3);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--sp-2);
  font-size: var(--fs-small);
}
.footer-bottom ul { list-style: none; display: flex; gap: var(--sp-3); padding: 0; margin: 0; }
@media (max-width: 960px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Utility ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--c-accent); color: #fff;
  padding: 0.75em 1.25em; z-index: 200;
}
.skip-link:focus { left: var(--sp-2); top: var(--sp-2); }
.badge {
  display: inline-flex; align-items: center; padding: 0.3em 0.8em; border-radius: 999px;
  font-size: var(--fs-small); font-weight: 600; background: var(--c-blue-100); color: var(--c-accent);
}
.badge--muted { background: var(--c-bg-alt); color: var(--c-text-muted); }
.placeholder-note {
  font-size: var(--fs-small); color: var(--c-text-muted); font-style: italic;
  border-left: 2px solid var(--c-border); padding-left: 0.75em;
}
.link-btn {
  background: none; border: none; padding: 0; color: inherit; cursor: pointer;
  font: inherit; text-decoration: none;
}
.link-btn:hover { color: var(--c-white); }

/* ---------- Mobile Nav ---------- */
.mobile-nav {
  display: none;
  position: fixed; inset: 0; top: 84px; z-index: 90;
  background: var(--c-white);
  padding: var(--sp-4) var(--container-pad);
  flex-direction: column;
  gap: var(--sp-4);
  overflow-y: auto;
}
.mobile-nav.is-open { display: flex; }
.mobile-nav__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: var(--sp-2);
}
.mobile-nav__list a { font-size: 1.5rem; font-weight: 600; }

/* ---------- Cookie Banner ---------- */
.cookie-banner {
  position: fixed; left: var(--sp-2); right: var(--sp-2); bottom: var(--sp-2); z-index: 300;
  max-width: 640px; margin-inline: auto;
  background: var(--c-anthracite-900); color: var(--c-white);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
}
.cookie-banner__inner { padding: var(--sp-3); }
.cookie-banner__inner p { color: var(--c-text-on-dark-muted); font-size: var(--fs-small); margin-bottom: var(--sp-2); }
.cookie-banner__actions { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.cookie-banner .btn-secondary { color: var(--c-white); border-color: rgba(255,255,255,0.3); }
.cookie-banner .btn-secondary:hover { border-color: var(--c-white); }

/* ---------- Image placeholder (real photography pending) ---------- */
.img-placeholder {
  position: relative;
  width: 100%; height: 100%; min-height: 220px;
  background: repeating-linear-gradient(135deg, var(--c-graphite-700), var(--c-graphite-700) 12px, var(--c-anthracite-800) 12px, var(--c-anthracite-800) 24px);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-steel-300);
}
.img-placeholder span {
  font-size: var(--fs-small); background: rgba(20,23,26,0.75); padding: 0.5em 1em; border-radius: var(--radius-sm);
  text-align: center; max-width: 80%;
}

/* ---------- WooCommerce re-skin: shop must not look like a foreign system ---------- */
.woo-main { padding-block: var(--sp-6); }
.woocommerce ul.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); list-style: none; padding: 0; }
.woocommerce ul.products li.product {
  background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius-md);
  padding: var(--sp-2); transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.woocommerce ul.products li.product:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.woocommerce ul.products li.product img { border-radius: var(--radius-sm); aspect-ratio: 4/3; object-fit: cover; }
.woocommerce ul.products li.product .woocommerce-loop-product__title { font-size: 1.05rem; font-weight: 600; color: var(--c-text); margin-top: var(--sp-1); }
.woocommerce ul.products li.product .price { color: var(--c-accent); font-weight: 700; }
.woocommerce a.button, .woocommerce button.button, .woocommerce input.button,
.woocommerce #respond input#submit, .woocommerce-page a.button {
  background: var(--c-accent); color: var(--c-white) !important; border-radius: var(--radius-sm);
  padding: 0.85em 1.5em; font-weight: 600; border: none; transition: background var(--dur-fast) var(--ease);
}
.woocommerce a.button:hover, .woocommerce button.button:hover { background: var(--c-accent-hover); }
.woocommerce nav.woocommerce-breadcrumb { font-size: var(--fs-small); color: var(--c-text-muted); margin-bottom: var(--sp-3); }
.woocommerce div.product div.summary { padding-left: var(--sp-4); }
.woocommerce table.shop_table { border-collapse: collapse; width: 100%; }
.woocommerce table.shop_table th, .woocommerce table.shop_table td { border-bottom: 1px solid var(--c-border); padding: 0.85em 1em; }
@media (max-width: 960px) { .woocommerce ul.products { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .woocommerce ul.products { grid-template-columns: 1fr; } .woocommerce div.product div.summary { padding-left: 0; } }