/* ========================================
   Gebri.de - Gerhard Brinkmann
   Handwerkliches Handwerk: Heizung, Sanitär, Rohrfußleisten
   ======================================== */

/* CSS-Variablen */
:root {
  --color-primary: #1e293b;
  --color-primary-dark: #0f172a;
  --color-accent: #c2410c;
  --color-accent-dark: #9a3412;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
  --radius-sm: 0.375rem;
  --max-width: 1200px;
  --header-height: 5.75rem;
  --transition: 200ms ease;
}

/* Reset & Basis */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: color var(--transition);
}

a:hover, a:focus {
  color: var(--color-accent-dark);
}

h1, h2, h3, h4 {
  margin-top: 0;
  line-height: 1.25;
  color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

ul, ol {
  margin-top: 0;
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.35rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo img {
  height: 2.75rem;
  width: auto;
}

.logo span {
  line-height: 1.2;
}

.logo small {
  display: block;
  font-size: 0.7em;
  font-weight: 500;
  color: var(--color-text-light);
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}

.nav-menu a {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus,
.nav-menu a[aria-current="page"] {
  color: var(--color-accent);
  background-color: rgb(234 88 12 / 0.06);
}

.phone-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background-color var(--transition), transform var(--transition);
}

.phone-cta:hover,
.phone-cta:focus {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-primary);
}

.menu-toggle svg {
  width: 1.75rem;
  height: 1.75rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #fff;
  overflow: hidden;
}

.hero__image {
  position: absolute;
  inset: 0;
  background-image: url("../images/hero.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: 4rem;
}

.hero h1 {
  color: #fff;
  margin-bottom: 1rem;
  max-width: 800px;
}

.hero__subtitle {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  opacity: 0.95;
  margin-bottom: 2rem;
  max-width: 700px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.btn--outline:hover,
.btn--outline:focus {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

.btn--light {
  background: #fff;
  color: var(--color-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn--light:hover,
.btn--light:focus {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Sections */
.section {
  padding-block: 4rem;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__intro {
  max-width: 720px;
  margin-bottom: 2.5rem;
}

.section__intro h2 {
  margin-bottom: 0.75rem;
}

.section__intro p {
  font-size: 1.125rem;
  color: var(--color-text-light);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.card__icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgb(234 88 12 / 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p:last-child {
  margin-bottom: 0;
}

/* Contact box */
.contact-box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .contact-box {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.contact-card h2 {
  margin-bottom: 1.25rem;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.contact-list svg {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.25rem;
  color: var(--color-accent);
}

.hours {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.hours h3 {
  margin-bottom: 0.75rem;
}

.hours table {
  width: 100%;
  border-collapse: collapse;
}

.hours th,
.hours td {
  text-align: left;
  padding: 0.4rem 0;
}

.hours th {
  color: var(--color-text-light);
  font-weight: 500;
}

/* Content pages */
.page-content {
  max-width: 800px;
}

.page-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.page-content h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.page-content h2 + h3 {
  margin-top: 1.25rem;
}

.page-content ul li {
  margin-bottom: 0.5rem;
}

/* Address blocks */
.address-block {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 1.5rem;
}

.address-block p {
  margin-bottom: 0.25rem;
}

/* Lists */
.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--color-accent);
  border-radius: 50%;
}

/* CTA section */
.cta {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding-block: 4rem;
}

.cta h2 {
  color: #fff;
  margin-bottom: 1rem;
}

.cta p {
  opacity: 0.9;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 1.75rem;
}

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: #cbd5e1;
  padding-block: 3rem 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.footer-col p,
.footer-col a {
  color: #cbd5e1;
}

.footer-col a {
  text-decoration: none;
}

.footer-col a:hover,
.footer-col a:focus {
  color: #fff;
  text-decoration: underline;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgb(255 255 255 / 0.1);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9375rem;
  color: #94a3b8;
}

/* Product gallery */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.product-card__image {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.product-card__image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.product-card__body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__body h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.product-card__body p {
  margin-bottom: 0;
  font-size: 0.95rem;
  color: var(--color-text-light);
}

.product-card__meta {
  margin-top: auto;
  padding-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Utilities */
.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;
}

.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* Mobile Navigation */
@media (max-width: 900px) {
  .menu-toggle {
    display: block;
    order: 2;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.25rem 1.5rem;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu {
    flex-direction: column;
    gap: 0.25rem;
  }

  .nav-menu a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .phone-cta {
    justify-content: center;
  }

  .hero {
    min-height: 360px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}