/* ===================================================
   БЕТОН CONCRETE — Stylesheet v5
   Prefix: .pb-
   Design: dark green + concrete texture + lime green accents
   Style: brutalist industrial
   Fonts: Archivo Black (headings) + Inter (body)
   =================================================== */

:root {
  --pb-bg: #0A1208;
  --pb-bg-alt: #0E1A0A;
  --pb-bg-card: #141E10;
  --pb-surface: #1A2816;
  --pb-yellow: #8BC34A;
  --pb-yellow-bright: #9CCC65;
  --pb-yellow-dim: rgba(139, 195, 74, 0.12);
  --pb-text: #E8E4DC;
  --pb-text-muted: #7A8E6A;
  --pb-text-dim: #5A6B50;
  --pb-border: rgba(255, 255, 255, 0.06);
  --pb-border-accent: rgba(139, 195, 74, 0.25);
  --pb-font-h: 'Archivo Black', sans-serif;
  --pb-font-b: 'Inter', sans-serif;
  --pb-speed: 0.3s;
  --pb-max: 1060px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--pb-font-b);
  background: var(--pb-bg);
  color: var(--pb-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* Concrete grain texture overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

a { color: var(--pb-yellow); text-decoration: none; transition: color var(--pb-speed); }
a:hover { color: var(--pb-yellow-bright); }
img { max-width: 100%; display: block; }

/* --- Wrap --- */
.pb-wrap {
  width: 100%;
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Labels & Titles --- */
.pb-label {
  font-family: var(--pb-font-b);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--pb-yellow);
  margin-bottom: 0.75rem;
}

.pb-label--light { color: var(--pb-yellow-bright); }

.pb-title {
  font-family: var(--pb-font-h);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--pb-text);
  margin-bottom: 2.5rem;
  line-height: 1.15;
}

.pb-title--light { color: #fff; }

/* ================================================
   NAVIGATION — dark bar, left-heavy
   ================================================ */
.pb-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 18, 8, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--pb-border);
  transition: box-shadow var(--pb-speed);
}

.pb-nav--scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  border-bottom-color: var(--pb-border-accent);
}

.pb-nav__bar {
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.pb-nav__brand {
  font-family: var(--pb-font-h);
  font-size: 0.85rem;
  color: var(--pb-text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

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

.pb-nav__brand-mark {
  width: 20px;
  height: 20px;
  background: var(--pb-yellow);
  display: block;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.pb-nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.pb-nav__links a {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--pb-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--pb-speed);
}

.pb-nav__links a:hover { color: var(--pb-text); }

.pb-nav__cta-link {
  color: var(--pb-yellow) !important;
  border: 1px solid var(--pb-border-accent);
  padding: 0.35rem 1rem;
  font-size: 0.72rem !important;
  letter-spacing: 0.1em !important;
}

.pb-nav__cta-link:hover {
  background: var(--pb-yellow);
  color: var(--pb-bg) !important;
}

.pb-nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.pb-nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--pb-text);
  transition: var(--pb-speed);
}

/* ================================================
   HERO — full bleed, concrete overlay
   ================================================ */
.pb-hero {
  min-height: 100vh;
  padding: 56px 0 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.pb-hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(175deg, rgba(10,18,8,0.95) 0%, rgba(10,18,8,0.7) 50%, rgba(10,18,8,0.95) 100%),
    repeating-conic-gradient(rgba(255,255,255,0.02) 0% 25%, transparent 0% 50%) 0 0 / 40px 40px;
  z-index: 0;
}

.pb-hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: 5rem 1.5rem 3rem;
  width: 100%;
}

.pb-hero__tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--pb-text-dim);
  margin-bottom: 2rem;
}

.pb-hero__title {
  font-family: var(--pb-font-h);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--pb-text);
  margin-bottom: 1.5rem;
}

.pb-hero__accent {
  color: var(--pb-yellow);
  position: relative;
}

.pb-hero__accent::after {
  content: '';
  position: absolute;
  bottom: 0.08em;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--pb-yellow);
  opacity: 0.3;
}

.pb-hero__sub {
  font-size: 1.05rem;
  color: var(--pb-text-muted);
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

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

/* Stats bar pinned at hero bottom */
.pb-hero__stats {
  position: relative;
  z-index: 1;
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  width: 100%;
  display: flex;
  gap: 3rem;
}

.pb-stat {
  display: flex;
  flex-direction: column;
}

.pb-stat__num {
  font-family: var(--pb-font-h);
  font-size: 1.8rem;
  color: var(--pb-yellow);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.pb-stat__label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pb-text-dim);
}

/* --- CTA Buttons --- */
.pb-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-family: var(--pb-font-b);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all var(--pb-speed);
  border: none;
  text-decoration: none;
}

.pb-cta--yellow {
  background: var(--pb-yellow);
  color: var(--pb-bg);
}
.pb-cta--yellow:hover {
  background: var(--pb-yellow-bright);
  color: var(--pb-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139, 195, 74, 0.25);
}

.pb-cta--outline {
  background: transparent;
  color: var(--pb-text);
  border: 1.5px solid var(--pb-surface);
}
.pb-cta--outline:hover {
  border-color: var(--pb-yellow);
  color: var(--pb-yellow);
  transform: translateY(-2px);
}

/* ================================================
   PRODUCTS — accordion / expandable
   ================================================ */
.pb-products {
  padding: 6rem 0;
  background: var(--pb-bg);
}

.pb-accordion {
  max-width: var(--pb-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.pb-acc {
  border-top: 1px solid var(--pb-border);
  transition: background var(--pb-speed);
}

.pb-acc:last-child {
  border-bottom: 1px solid var(--pb-border);
}

.pb-acc[open] {
  background: var(--pb-bg-alt);
}

.pb-acc__head {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: padding var(--pb-speed);
}

.pb-acc__head::-webkit-details-marker { display: none; }

.pb-acc__head:hover {
  padding-left: 1.5rem;
}

.pb-acc__idx {
  font-family: var(--pb-font-h);
  font-size: 0.75rem;
  color: var(--pb-yellow);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  width: 30px;
}

.pb-acc__name {
  font-family: var(--pb-font-h);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--pb-text);
  flex: 1;
}

.pb-acc__arrow {
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--pb-text-dim);
  border-bottom: 2px solid var(--pb-text-dim);
  transform: rotate(45deg);
  transition: transform var(--pb-speed);
  flex-shrink: 0;
}

.pb-acc[open] .pb-acc__arrow {
  transform: rotate(-135deg);
}

.pb-acc__body {
  padding: 0 1rem 1.5rem 4.5rem;
}

.pb-acc__body p {
  font-size: 0.92rem;
  color: var(--pb-text-muted);
  line-height: 1.75;
  max-width: 580px;
}

/* ================================================
   MARQUEE — yellow accent band
   ================================================ */
.pb-marquee {
  overflow: hidden;
  padding: 1rem 0;
  background: var(--pb-yellow);
}

.pb-marquee__rail {
  display: flex;
  gap: 2rem;
  animation: pb-scroll 35s linear infinite;
  white-space: nowrap;
  width: max-content;
}

.pb-marquee__rail span {
  font-family: var(--pb-font-h);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--pb-bg);
}

.pb-marquee__rail span::after {
  content: '\25C6';
  margin-left: 2rem;
  opacity: 0.3;
}

@keyframes pb-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ================================================
   ABOUT — split grid
   ================================================ */
.pb-about {
  padding: 6rem 0;
  background: var(--pb-bg-alt);
}

.pb-about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.pb-about__desc {
  font-size: 1rem;
  color: var(--pb-text-muted);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  max-width: 420px;
}

.pb-about__verified {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background: var(--pb-yellow-dim);
  border: 1px solid var(--pb-border-accent);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--pb-yellow);
}

.pb-about__card {
  background: var(--pb-bg-card);
  border: 1px solid var(--pb-border);
  padding: 0;
}

.pb-about__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--pb-border);
  gap: 1rem;
}

.pb-about__row:last-child { border-bottom: none; }

.pb-about__key {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pb-text-dim);
  flex-shrink: 0;
}

.pb-about__val {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--pb-text);
  text-align: right;
}

.pb-about__val a { color: var(--pb-yellow); }

/* ================================================
   CONTACT — dark band with cards
   ================================================ */
.pb-contact {
  padding: 6rem 0;
  background: var(--pb-bg);
}

.pb-contact__cols {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.pb-contact__text p {
  font-size: 1rem;
  color: var(--pb-text-muted);
  line-height: 1.8;
  max-width: 400px;
}

.pb-contact__cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pb-ccard {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--pb-bg-card);
  border: 1px solid var(--pb-border);
  transition: all var(--pb-speed);
  text-decoration: none;
}

.pb-ccard:hover {
  border-color: var(--pb-border-accent);
  transform: translateX(6px);
}

.pb-ccard svg {
  color: var(--pb-yellow);
  flex-shrink: 0;
}

.pb-ccard strong {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pb-text-dim);
  margin-bottom: 0.15rem;
}

.pb-ccard span {
  font-size: 0.9rem;
  color: var(--pb-text);
}

/* ================================================
   FOOTER
   ================================================ */
.pb-footer {
  background: var(--pb-surface);
  padding: 2.5rem 0 1.5rem;
  border-top: 2px solid var(--pb-yellow);
}

.pb-footer__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--pb-border);
  margin-bottom: 1.5rem;
}

.pb-footer__brand {
  font-family: var(--pb-font-h);
  font-size: 0.85rem;
  color: var(--pb-text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pb-footer__links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.pb-footer__links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--pb-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color var(--pb-speed);
}

.pb-footer__links a:hover { color: var(--pb-text); }

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

.pb-footer__legal p {
  font-size: 0.72rem;
  color: var(--pb-text-dim);
  margin-bottom: 0.2rem;
}

.pb-footer__legal a { color: var(--pb-yellow); }

/* ================================================
   ANIMATIONS
   ================================================ */
.pb-anim {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 900px) {
  .pb-about__grid {
    grid-template-columns: 1fr;
  }

  .pb-contact__cols {
    grid-template-columns: 1fr;
  }

  .pb-hero__stats {
    gap: 2rem;
    flex-wrap: wrap;
  }

  .pb-footer__row {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .pb-nav__burger { display: flex; }

  .pb-nav__links {
    display: none;
    position: fixed;
    top: 56px;
    left: 0; right: 0;
    background: rgba(10, 18, 8, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0;
    border-bottom: 1px solid var(--pb-border);
    z-index: 999;
  }

  .pb-nav__links.pb-nav__links--open { display: flex; }

  .pb-nav__links a {
    display: block;
    padding: 0.85rem 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--pb-border);
  }

  .pb-nav__cta-link {
    border: none !important;
    padding: 0.85rem 0 !important;
    text-align: left;
  }

  .pb-hero__title {
    font-size: clamp(2rem, 10vw, 3.2rem);
  }

  .pb-hero__content {
    padding: 4rem 1.5rem 2rem;
  }

  .pb-hero__actions {
    flex-direction: column;
  }

  .pb-cta { width: 100%; justify-content: center; }

  .pb-hero__stats {
    gap: 1.5rem;
    padding-bottom: 2rem;
  }

  .pb-stat__num { font-size: 1.4rem; }

  .pb-acc__body {
    padding-left: 1rem;
  }

  .pb-about__row {
    flex-direction: column;
    gap: 0.15rem;
  }

  .pb-about__val { text-align: left; }

  .pb-footer__links { gap: 0.75rem; }
}

@media (max-width: 400px) {
  .pb-hero__title { font-size: 1.8rem; }
  .pb-title { font-size: 1.4rem; }
  .pb-hero__stats { gap: 1rem; }
}