/* ============================================================
   Staßfurter Fenster- und Türenwerk GmbH
   Main Stylesheet – Mobile-First
   ============================================================ */

/* ----- CSS Reset (minimal) ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ----- Custom Properties ----- */
:root {
  /* Brand colors */
  --primary: #3a7d44;
  --primary-dark: #2c5e33;
  --primary-light: #e8f5e9;
  --secondary: #2c3e50;
  --accent: #d4a853;
  --accent-hover: #c49a42;

  /* Neutrals */
  --white: #ffffff;
  --light: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-600: #636e72;
  --text: #2d3436;
  --text-light: #636e72;
  --dark: #1a202c;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 4rem;

  /* Transitions */
  --transition: 0.3s ease;
  --transition-slow: 0.6s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

/* ----- Container ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}

.site-header--scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__logo img {
  height: 3.3rem;
  width: auto;
}

/* Hamburger */
.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--secondary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 75%;
  max-width: 320px;
  height: 100vh;
  background: var(--white);
  padding: calc(var(--nav-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  box-shadow: var(--shadow-lg);
  transition: right var(--transition);
}

.nav__menu--open {
  right: 0;
}

.nav__link {
  display: block;
  padding: var(--space-xs) 0;
  font-weight: 500;
  color: var(--secondary);
  transition: color var(--transition);
  font-size: 1.1rem;
}

.nav__link:hover,
.nav__link--active {
  color: var(--primary);
}

.nav__link--cta {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: 0.6rem 1.5rem;
  background: var(--primary);
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: background var(--transition);
}

.nav__link--cta:hover {
  background: var(--primary-dark);
}

/* Desktop Nav */
@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
    box-shadow: none;
  }

  .nav__link {
    font-size: 0.95rem;
    padding: 0.3rem 0;
    position: relative;
  }

  .nav__link:not(.nav__link--cta)::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
  }

  .nav__link:not(.nav__link--cta):hover::after,
  .nav__link--active:not(.nav__link--cta)::after {
    width: 100%;
  }

  .nav__link--cta {
    margin-top: 0;
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
  }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.btn--accent {
  background: var(--accent);
  color: var(--dark);
}

.btn--accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--primary {
  background: var(--primary);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--primary-dark);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: var(--secondary);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: var(--space-lg);
}

.hero__logo {
  max-width: min(500px, 80vw);
  height: auto;
  margin: 0 auto var(--space-md);
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--space-sm);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 300;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.hero__badge {
  margin-top: var(--space-md);
}

.hero__badge img {
  max-width: 140px;
  height: auto;
  margin: 0 auto;
  opacity: 0.8;
  filter: brightness(1.3);
  transition: opacity var(--transition);
}

.hero__badge img:hover {
  opacity: 0.95;
}

.hero__cta {
  font-size: 1.1rem;
  padding: 1rem 2.5rem;
}

/* ============================================================
   SECTIONS (General)
   ============================================================ */
.section {
  padding: var(--space-2xl) 0;
}

.section--light {
  background: var(--light);
}

.section--dark {
  background: var(--secondary);
  color: var(--white);
}

.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--secondary);
  text-align: center;
  margin-bottom: var(--space-sm);
}

.section__title--light {
  color: var(--white);
}

.section__intro {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.section__intro--light {
  color: var(--gray-300);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-xl);
}

.about__text p {
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.about__text strong {
  color: var(--primary-dark);
}

.about__image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

/* Trust Badges */
.trust-badges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.trust-badge {
  text-align: center;
  padding: var(--space-md);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.trust-badge:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.trust-badge__icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-sm);
  color: var(--primary);
}

.trust-badge__icon svg {
  width: 100%;
  height: 100%;
}

.trust-badge__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.25rem;
}

.trust-badge__text {
  font-size: 0.85rem;
  color: var(--text-light);
}

@media (min-width: 768px) {
  .trust-badges {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================================
   SERVICES (Leistungen)
   ============================================================ */
.services {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.service-card {
  text-align: center;
  padding: var(--space-lg);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto var(--space-sm);
  color: var(--primary);
}

.service-card__icon svg,
.service-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.service-card__text {
  font-size: 0.9rem;
  color: var(--text-light);
}

@media (min-width: 600px) {
  .services {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .services {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Center the last two cards when 5 items in 3 columns */
@media (min-width: 900px) {
  .services {
    justify-items: center;
  }

  .service-card {
    width: 100%;
  }

  /* Last row: 2 items centered in a 3-col grid */
  .service-card:nth-child(4),
  .service-card:nth-child(5) {
    /* handled naturally by grid */
  }
}

/* ============================================================
   PRODUCTS (Produkte)
   ============================================================ */
.products {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-card__image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--gray-100);
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image img {
  transform: scale(1.05);
}

.product-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--secondary);
  padding: var(--space-sm) var(--space-sm) 0.25rem;
}

.product-card__text {
  font-size: 0.9rem;
  color: var(--text-light);
  padding: 0 var(--space-sm) var(--space-sm);
}

@media (min-width: 500px) {
  .products {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .products {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Product card gallery button (Haustürfüllungen) */
.product-card__gallery-btn {
  display: block;
  width: calc(100% - 2 * var(--space-sm));
  margin: 0 var(--space-sm) var(--space-sm);
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.product-card__gallery-btn:hover {
  background: var(--primary);
  color: var(--white);
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox--open {
  opacity: 1;
  visibility: visible;
}

.lightbox__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}

.lightbox__content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  max-height: 90vh;
  width: 95%;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow-y: auto;
  padding: var(--space-lg);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.lightbox--open .lightbox__content {
  transform: scale(1);
}

.lightbox__close {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--gray-500);
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
  z-index: 2;
}

.lightbox__close:hover {
  color: var(--text);
}

.lightbox__title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: var(--space-md);
  text-align: center;
}

.lightbox__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.lightbox__images img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 700px) {
  .lightbox__images {
    grid-template-columns: 1fr;
  }

  .lightbox__content {
    padding: var(--space-md);
  }
}

/* ============================================================
   GALLERY (Impressionen)
   ============================================================ */
.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.gallery__item {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery__item:hover img {
  transform: scale(1.03);
}

@media (min-width: 768px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
  }

  .gallery__item--wide {
    grid-column: 1 / -1;
  }
}

/* ============================================================
   CONTACT (Kontakt) – Card Layout
   ============================================================ */
.contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .contact-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: background var(--transition), transform var(--transition);
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.contact-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto var(--space-md);
  color: var(--accent);
}

.contact-card__icon svg {
  width: 3.5rem;
  height: 3.5rem;
}

.contact-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.contact-card address,
.contact-card p {
  font-style: normal;
  color: var(--gray-300);
  line-height: 1.7;
  font-size: 0.95rem;
}

.contact-card__numbers a {
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition);
}

.contact-card__numbers a:hover {
  color: var(--accent);
}

.contact-card__hours {
  margin-top: var(--space-sm);
}

.contact-card__email {
  font-size: 0.85rem;
  color: var(--white);
  word-break: break-all;
  margin-top: var(--space-xs);
}

.contact-card__fax {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: var(--space-sm);
}

.contact-card__btn {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: 0.9rem;
  padding: 0.7rem 1.5rem;
}

.opening-hours {
  border-collapse: collapse;
  color: var(--gray-300);
  font-size: 0.9rem;
  margin: 0 auto;
}

.opening-hours td {
  padding: 0.15rem 0;
}

.opening-hours td:first-child {
  padding-right: var(--space-md);
  text-align: left;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--dark);
  color: var(--gray-300);
  padding-top: var(--space-xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
  height: 3.5rem;
  width: auto;
  margin-bottom: var(--space-sm);
  /* Invert logo for dark background if needed */
  filter: brightness(0) invert(1) opacity(0.7);
}

.footer__tagline {
  font-size: 0.9rem;
  color: var(--gray-500);
}

.footer h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

.footer ul li {
  margin-bottom: 0.3rem;
}

.footer a {
  color: var(--gray-300);
  transition: color var(--transition);
  font-size: 0.9rem;
}

.footer a:hover {
  color: var(--primary-light);
}

.footer__bottom {
  text-align: center;
  padding: var(--space-md) 0;
  font-size: 0.8rem;
  color: var(--gray-500);
}

@media (min-width: 768px) {
  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}

/* ============================================================
   PLACEHOLDER IMAGES (remove when real images arrive)
   ============================================================ */
.placeholder-img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  background:
    linear-gradient(135deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  position: relative;
}

.placeholder-img::after {
  content: attr(data-label);
  color: var(--gray-500);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  padding: var(--space-sm);
}

.placeholder-img--gallery {
  min-height: 250px;
}

.placeholder-img--map {
  min-height: 180px;
  background:
    linear-gradient(135deg, #e8f0e8 25%, #d0ddd0 50%, #e8f0e8 75%);
  border-radius: var(--radius-md);
}

/* ============================================================
   SCROLL ANIMATIONS (reveal)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children slightly */
.reveal .trust-badge,
.reveal .service-card,
.reveal .product-card,
.reveal .gallery__item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal--visible .trust-badge,
.reveal--visible .service-card,
.reveal--visible .product-card,
.reveal--visible .gallery__item {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.reveal--visible :nth-child(1) { transition-delay: 0.05s; }
.reveal--visible :nth-child(2) { transition-delay: 0.1s; }
.reveal--visible :nth-child(3) { transition-delay: 0.15s; }
.reveal--visible :nth-child(4) { transition-delay: 0.2s; }
.reveal--visible :nth-child(5) { transition-delay: 0.25s; }
.reveal--visible :nth-child(6) { transition-delay: 0.3s; }
.reveal--visible :nth-child(7) { transition-delay: 0.35s; }
.reveal--visible :nth-child(8) { transition-delay: 0.4s; }
.reveal--visible :nth-child(9) { transition-delay: 0.45s; }

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--primary);
  color: var(--white);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  z-index: 9999;
}

.skip-link:focus {
  top: var(--space-xs);
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header,
  .hero__overlay,
  .nav__toggle,
  .contact-form,
  .footer {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--space-lg);
  }

  .section {
    padding: var(--space-md) 0;
  }
}