:root {
  --prp-black: #000000;
  --prp-white: #ffffff;
  --prp-ink: #111111;
  --prp-muted: #4d4d4d;
  --prp-line: #e6e6e6;
  --prp-soft: #f5f5f5;
  --prp-soft-2: #fafafa;
  --prp-border: #d9d9d9;
  --prp-shadow: rgba(0, 0, 0, 0.08);
  --prp-max: 1120px;
  --prp-font: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --prp-display: "IBM Plex Serif", Georgia, "Times New Roman", serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--prp-ink);
  background:
    linear-gradient(180deg, #ffffff 0%, #f7f7f7 48%, #ffffff 100%);
  font-family: var(--prp-font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { opacity: 0.82; }
h1, h2, h3, h4 {
  font-family: var(--prp-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}
p { margin: 0 0 1rem; }
ul { margin: 0; padding: 0; list-style: none; }

.prp-wrap {
  width: min(100% - 2rem, var(--prp-max));
  margin-inline: auto;
}

/* Top bar */
.prp-topbar {
  background: var(--prp-black);
  color: var(--prp-white);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.prp-topbar .prp-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
}
.prp-topbar a { color: #fff; text-decoration: none; }

/* Header */
.prp-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--prp-line);
}
.prp-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.9rem 0;
}
.prp-brand {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
}
.prp-brand-name {
  font-family: var(--prp-display);
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--prp-black);
}
.prp-brand-tag {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--prp-muted);
}
.prp-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  align-items: center;
  justify-content: flex-end;
}
.prp-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--prp-ink);
}
.prp-nav a.is-active,
.prp-nav a:hover { text-decoration: underline; }
.prp-nav .prp-cta-mini {
  background: var(--prp-black);
  color: #fff !important;
  padding: 0.45rem 0.85rem;
  border-radius: 2px;
  text-decoration: none !important;
}
.prp-menu-toggle {
  display: none;
  border: 1px solid var(--prp-border);
  background: #fff;
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}

/* Hero — full-bleed, brand-first */
.prp-hero {
  position: relative;
  min-height: min(88vh, 820px);
  display: grid;
  align-items: end;
  color: #fff;
  overflow: hidden;
  background:
    linear-gradient(105deg, rgba(0,0,0,0.82) 0%, rgba(0,0,0,0.45) 48%, rgba(0,0,0,0.25) 100%),
    radial-gradient(ellipse at 70% 30%, rgba(255,255,255,0.12), transparent 55%),
    #0a0a0a url("../img/hero-lab.jpg") center/cover no-repeat;
}
.prp-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 120px;
  background: linear-gradient(to top, #fff, transparent);
  pointer-events: none;
}
.prp-hero-inner {
  position: relative;
  z-index: 1;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(4rem, 9vw, 6.5rem);
  max-width: 720px;
}
.prp-hero .prp-brand-name {
  color: #fff;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  margin-bottom: 0.85rem;
}
.prp-hero h1 {
  font-size: clamp(1.25rem, 2.8vw, 1.85rem);
  font-weight: 500;
  max-width: 34ch;
  margin-bottom: 0.85rem;
}
.prp-hero p {
  color: rgba(255,255,255,0.88);
  max-width: 48ch;
  font-size: 1.02rem;
}
.prp-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.prp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  padding: 0.75rem 1.15rem;
  font: inherit;
  font-weight: 560;
  font-size: 0.95rem;
  text-decoration: none !important;
  cursor: pointer;
  border-radius: 2px;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}
.prp-btn:hover { transform: translateY(-1px); }
.prp-btn-primary {
  background: #fff;
  color: #000;
}
.prp-btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.55);
}
.prp-btn-dark {
  background: var(--prp-black);
  color: #fff;
}
.prp-btn-outline {
  background: transparent;
  color: var(--prp-black);
  border-color: var(--prp-black);
}

/* Sections */
.prp-section {
  padding: clamp(3rem, 7vw, 5rem) 0;
}
.prp-section-muted { background: var(--prp-soft-2); }
.prp-section-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.75rem;
  max-width: 62ch;
}
.prp-eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--prp-muted);
  font-weight: 600;
}
.prp-section h2 { font-size: clamp(1.55rem, 3vw, 2.15rem); }
.prp-section-head p { color: var(--prp-muted); margin: 0; }

.prp-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.prp-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.1rem;
}
.prp-step,
.prp-highlight {
  padding: 1.15rem 1.2rem;
  border-top: 2px solid var(--prp-black);
  background: #fff;
}
.prp-step strong,
.prp-highlight strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 0.35rem;
}
.prp-step p,
.prp-highlight p {
  color: var(--prp-muted);
  font-size: 0.94rem;
  margin: 0;
}
.prp-step-num {
  font-family: var(--prp-display);
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}

/* Product cards — not heavy “cards”; border only for shop grid interaction */
.prp-products {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.prp-product {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--prp-line);
  text-decoration: none !important;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
  overflow: hidden;
}
.prp-product:hover {
  border-color: #000;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px var(--prp-shadow);
}
.prp-product-media {
  aspect-ratio: 1 / 1.05;
  background: #fff;
  display: grid;
  place-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--prp-line);
}
.prp-product-media img {
  width: min(78%, 240px);
  margin: 0 auto;
  object-fit: contain;
}
.prp-product-body {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem 1rem 1.15rem;
  flex: 1;
}
.prp-product-title {
  font-family: var(--prp-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.prp-product-desc {
  color: var(--prp-muted);
  font-size: 0.88rem;
  flex: 1;
}
.prp-product-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.35rem;
}
.prp-price {
  font-weight: 650;
  font-size: 1.05rem;
}
.prp-learn {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--prp-muted);
}

/* Converter */
.prp-converter {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}
.prp-converter-panel {
  background: #fff;
  border: 1px solid var(--prp-line);
  padding: 1.25rem;
}
.prp-field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}
.prp-field label {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--prp-muted);
  font-weight: 600;
}
.prp-field input,
.prp-field select,
.prp-field textarea {
  width: 100%;
  border: 1px solid var(--prp-border);
  background: #fff;
  padding: 0.7rem 0.75rem;
  font: inherit;
  border-radius: 2px;
}
.prp-field input:focus,
.prp-field select:focus,
.prp-field textarea:focus {
  outline: 2px solid #000;
  outline-offset: 1px;
}
.prp-results {
  display: grid;
  gap: 0.65rem;
}
.prp-result-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--prp-line);
  font-size: 0.95rem;
}
.prp-result-row strong { font-size: 1.05rem; }
.prp-note {
  color: var(--prp-muted);
  font-size: 0.88rem;
}

/* Woo overrides */
.woocommerce .prp-wrap,
.woocommerce-page .prp-wrap { width: min(100% - 2rem, var(--prp-max)); }

.woocommerce ul.products {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 0 !important;
}
.woocommerce ul.products::before,
.woocommerce ul.products::after { display: none !important; content: none !important; }
.woocommerce ul.products li.product {
  width: auto !important;
  margin: 0 !important;
  float: none !important;
  background: #fff;
  border: 1px solid var(--prp-line);
  padding: 0 !important;
  text-align: left;
}
.woocommerce ul.products li.product a img {
  margin: 0 auto;
  width: min(78%, 240px);
  padding: 1rem;
}
.woocommerce ul.products li.product .woocommerce-loop-product__title {
  font-family: var(--prp-display);
  font-size: 1.05rem !important;
  padding: 0 1rem;
  margin: 0.4rem 0;
}
.woocommerce ul.products li.product .price {
  padding: 0 1rem 0.4rem;
  color: var(--prp-ink) !important;
  font-weight: 650;
}
.woocommerce ul.products li.product .button,
.woocommerce a.button,
.woocommerce button.button,
.woocommerce input.button,
.woocommerce #respond input#submit {
  background: var(--prp-black) !important;
  color: #fff !important;
  border-radius: 2px !important;
  border: 0 !important;
  font-weight: 560 !important;
}
.woocommerce ul.products li.product .button {
  margin: 0 1rem 1rem !important;
}
.woocommerce div.product {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.woocommerce div.product .woocommerce-product-gallery { width: 100% !important; float: none !important; }
.woocommerce div.product .summary { width: 100% !important; float: none !important; margin: 0 !important; }
.woocommerce-message,
.woocommerce-info,
.woocommerce-error {
  border-top-color: #000 !important;
}

.prp-page-hero {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--prp-line);
  background: linear-gradient(180deg, #f3f3f3, #fff);
}
.prp-page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.prp-page-hero p { color: var(--prp-muted); max-width: 60ch; margin: 0; }

.prp-content { padding: 2rem 0 3.5rem; }
.prp-content .entry-content { max-width: 72ch; }
.prp-content .entry-content h2 { margin-top: 1.8rem; }

/* Footer */
.prp-footer {
  background: #0a0a0a;
  color: rgba(255,255,255,0.86);
  padding: 2.5rem 0 1.5rem;
  margin-top: 2rem;
}
.prp-footer a { color: #fff; }
.prp-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}
.prp-footer h3 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.prp-footer p,
.prp-footer li { font-size: 0.9rem; color: rgba(255,255,255,0.72); }
.prp-footer ul { display: grid; gap: 0.4rem; }
.prp-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: 1rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: space-between;
}

.prp-banner {
  background: #111;
  color: #fff;
  font-size: 0.82rem;
  text-align: center;
  padding: 0.55rem 1rem;
}
.prp-banner a { color: #fff; }

@keyframes prp-rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.prp-animate {
  animation: prp-rise 700ms cubic-bezier(.2,.7,.2,1) both;
}
.prp-animate-delay-1 { animation-delay: 120ms; }
.prp-animate-delay-2 { animation-delay: 240ms; }
.prp-animate-delay-3 { animation-delay: 360ms; }

@media (max-width: 960px) {
  .prp-grid-3,
  .prp-grid-4,
  .prp-products,
  .woocommerce ul.products,
  .prp-converter,
  .prp-footer-grid,
  .woocommerce div.product {
    grid-template-columns: 1fr 1fr;
  }
  .prp-grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .prp-menu-toggle { display: inline-flex; }
  .prp-nav {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.35rem);
    background: #fff;
    border: 1px solid var(--prp-line);
    padding: 0.85rem 1rem;
    flex-direction: column;
    align-items: flex-start;
    box-shadow: 0 12px 30px var(--prp-shadow);
  }
  .prp-nav.is-open { display: flex; }
  .prp-header { position: relative; }
  .prp-grid-3,
  .prp-grid-4,
  .prp-products,
  .woocommerce ul.products,
  .prp-converter,
  .prp-footer-grid,
  .woocommerce div.product {
    grid-template-columns: 1fr;
  }
  .prp-topbar .prp-wrap { flex-direction: column; gap: 0.25rem; }
}