:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-text: #33312e;
  --color-text-muted: #6b6862;
  --color-border: #e4e1db;
  --color-gray-200: #ece9e3;
  --color-accent: #2d943b;
  --color-accent-dark: #22752e;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --container-width: 1140px;
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; font-family: var(--font-sans); color: var(--color-text); background: var(--color-bg); line-height: 1.55; }
h1, h2, h3, h4 { line-height: 1.2; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.site-header__inner { position: relative; display: flex; align-items: center; justify-content: space-between; padding: 0.85rem 1.25rem; }
.logo { font-weight: 700; font-size: 1.1rem; color: var(--color-text); text-decoration: none; }
.logo span { color: var(--color-accent); }
.nav-toggle { display: flex; flex-direction: column; gap: 4px; background: none; border: 0; padding: 0.5rem; cursor: pointer; }
.nav-toggle__bar { width: 22px; height: 2px; background: var(--color-text); }
.nav {
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--color-surface); border-bottom: 1px solid var(--color-border);
  display: flex; flex-direction: column; padding-bottom: 6px;
  max-height: 0; overflow: hidden; transition: max-height 0.2s ease;
}
.nav.is-open { max-height: 2000px; }
.nav a { padding: 0.85rem 1.25rem; text-decoration: none; color: var(--color-text); border-top: 1px solid var(--color-border); }
.nav a:first-child { border-top: 0; }
.nav a:hover { color: var(--color-accent); }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .nav { position: static; max-height: none; overflow: visible; flex-direction: row; border-bottom: 0; background: none; }
  .nav a { border-top: 0; padding: 0.5rem 0.9rem; }
}

/* Nav submenus (model lists per category) */
.nav-item { display: flex; align-items: center; }
.nav-item > a { flex: 1; }
.nav-submenu-toggle {
  background: none; border: 0; padding: 0.85rem 1rem; cursor: pointer; color: var(--color-text-muted); font: inherit;
}
.nav-submenu-toggle::after { content: '▾'; display: inline-block; transition: transform 0.2s ease; }
.nav-submenu-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }
.nav-submenu {
  list-style: none; margin: 0; padding: 0; max-height: 0; overflow: hidden; background: var(--color-bg);
  transition: max-height 0.2s ease;
}
.nav-submenu.is-open { max-height: 600px; }
.nav-submenu li a {
  display: block; padding: 0.6rem 1.5rem; font-size: 0.88rem; color: var(--color-text-muted);
  text-decoration: none; border-top: 1px solid var(--color-border);
}
.nav-submenu li a:hover { color: var(--color-accent); }

@media (min-width: 900px) {
  .nav-item { position: relative; }
  .nav-submenu-toggle { display: none; }
  .nav-submenu {
    position: absolute; top: 100%; left: 0; min-width: 260px; max-height: none; overflow: visible;
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    opacity: 0; visibility: hidden; transform: translateY(4px); padding: 0.4rem 0; z-index: 60;
    transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  }
  .nav-item:hover .nav-submenu, .nav-item:focus-within .nav-submenu { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-submenu li a { border-top: 0; padding: 0.5rem 1rem; }
}

/* Buttons */
.btn { display: inline-block; padding: 0.75rem 1.5rem; border-radius: var(--radius); text-decoration: none; font-weight: 600; border: 2px solid transparent; cursor: pointer; font: inherit; }
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }

/* Hero */
.hero { position: relative; color: #fff; }
.hero__media { position: relative; aspect-ratio: 16 / 9; min-height: 340px; background: var(--color-gray-200); overflow: hidden; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__media::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.6)); }
.hero__content { position: absolute; bottom: 1.5rem; left: 0; right: 0; z-index: 1; }
.hero__content h1 { font-size: clamp(1.6rem, 5vw, 2.6rem); margin: 0 0 0.5rem; }
.hero__content p { max-width: 42ch; margin: 0 0 1.25rem; }

/* Why section */
.why { padding: 3rem 0; }
.why h2 { text-align: center; }
.why__intro { max-width: 65ch; margin: 0 auto 2rem; text-align: center; color: var(--color-text-muted); }
.why__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.why-tile { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.25rem; }
.why-tile h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.why-tile p { margin: 0; color: var(--color-text-muted); font-size: 0.95rem; }
.why-tile--highlight { background: var(--color-accent); color: #fff; grid-column: span 2; }
.why-tile--highlight p { color: rgba(255, 255, 255, 0.92); }

@media (min-width: 700px) {
  .why__grid { grid-template-columns: repeat(4, 1fr); }
}

/* Category sections */
.category { padding: 3rem 0; border-top: 1px solid var(--color-border); }
.category h2 { margin-bottom: 1.5rem; }
.category h3 { margin: 2rem 0 1rem; }
.products-grid, .accessories-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }

@media (min-width: 700px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .accessories-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
}

.product-card, .accessory-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; transition: box-shadow 0.4s ease;
}
.product-card.is-target-highlight { box-shadow: 0 0 0 3px var(--color-accent); }
.product-media, .accessory-media { position: relative; aspect-ratio: 4 / 3; background: var(--color-gray-200); }
.product-media img, .accessory-media img { width: 100%; height: 100%; object-fit: cover; }
.img-missing { visibility: hidden; }
.img-missing-label {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 0.5rem; font-size: 0.75rem; color: var(--color-text-muted); background: var(--color-gray-200);
}
.product-body, .accessory-body { padding: 1rem 1.1rem 1.25rem; display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.product-name, .accessory-name { margin: 0; font-size: 1.05rem; }
.product-description, .accessory-description { margin: 0; color: var(--color-text-muted); font-size: 0.92rem; }
.product-dimensions { list-style: none; margin: 0; padding: 0; font-size: 0.85rem; color: var(--color-text-muted); display: grid; gap: 0.2rem; }
.dim-label { color: var(--color-text); font-weight: 600; }
.product-applications { margin: 0; padding-left: 1.1rem; font-size: 0.88rem; color: var(--color-text-muted); }
.color-swatches { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; padding-top: 0.5rem; }
.color-btn {
  border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 999px;
  padding: 0.35rem 0.85rem; font-size: 0.8rem; cursor: pointer; color: var(--color-text); font: inherit;
}
.color-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.color-btn.active { border-color: var(--color-accent); color: var(--color-accent); background: rgba(45, 148, 59, 0.08); font-weight: 600; }

/* Model + accessories blocks (elewacja) */
.model-section { background: var(--color-gray-200); border-radius: 12px; padding: 1.1rem; margin-bottom: 1.5rem; }
.model-section:last-child { margin-bottom: 0; }
.model-section .product-card { flex-direction: row; }
.model-section .product-media { width: 38%; aspect-ratio: 4 / 3; flex-shrink: 0; }
.model-section .product-body { padding: 0.9rem 1rem; }
.model-section-subtitle { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-text-muted); margin: 1rem 0 0.6rem; }
@media (max-width: 480px) {
  .model-section .product-card { flex-direction: column; }
  .model-section .product-media { width: 100%; }
}

/* Downloads */
.downloads { padding: 3rem 0; border-top: 1px solid var(--color-border); }
.downloads-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.75rem; grid-template-columns: 1fr; }
.downloads-list a {
  display: block; padding: 0.9rem 1.1rem; border: 1px solid var(--color-border); border-radius: var(--radius);
  text-decoration: none; color: var(--color-text); background: var(--color-surface);
}
.downloads-list a:hover { border-color: var(--color-accent); color: var(--color-accent); }
@media (min-width: 700px) { .downloads-list { grid-template-columns: repeat(2, 1fr); } }

/* Contact */
.contact { padding: 3rem 0; border-top: 1px solid var(--color-border); background: var(--color-surface); }
.contact__inner { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.contact__info p { margin: 0.3rem 0; }
.contact__info a { color: var(--color-text); }
.contact__info a:hover { color: var(--color-accent); }
.contact__form { display: grid; gap: 0.9rem; }
.form-field { display: grid; gap: 0.35rem; }
.form-field--hidden { position: absolute; left: -9999px; }
.form-field label { font-size: 0.85rem; font-weight: 600; }
.form-field input, .form-field select, .form-field textarea {
  padding: 0.65rem 0.8rem; border: 1px solid var(--color-border); border-radius: 8px; font: inherit;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.form-status { min-height: 1.2em; font-size: 0.9rem; }
.form-status--success { color: var(--color-accent-dark); }
.form-status--error { color: #b3261e; }
.form-status--pending { color: var(--color-text-muted); }

@media (min-width: 900px) {
  .contact__inner { grid-template-columns: 1fr 1.2fr; }
}

/* Footer */
.site-footer { padding: 2rem 0; border-top: 1px solid var(--color-border); color: var(--color-text-muted); font-size: 0.85rem; }
.footer-links { list-style: none; display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; padding: 0; margin: 0.75rem 0; }
.footer-links a { color: var(--color-text-muted); }
.footer-links a:hover { color: var(--color-accent); }