*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --graphite: #1C1C1E;
    --graphite-80: #2A2A2D;
    --graphite-60: #3D3D42;
    --mid-gray: #6B6B72;
    --light-gray: #A8A8B0;
    --concrete: #E8E6E0;
    --concrete-light: #F2F0EC;
    --sand: #D4C9B5;
    --white: #FAFAF8;
    --terracotta: #B5522A;
    --terracotta-light: #C96A3E;
    --green-dark: #2C4A2E;
    --green-mid: #3D6640;
    --bronze: #9A7A4A;
    --bronze-light: #B8925C;
    --font: 'Manrope', sans-serif;
  }

  html { scroll-behavior: smooth; }

  body {
    font-family: var(--font);
    background: var(--white);
    color: var(--graphite);
    overflow-x: hidden;
  }

  /* NAV — плавающая «пилюля» со стеклянным блюром */
  nav {
    position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
    z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px;
    width: min(1180px, 94vw);
    padding: 0 14px 0 24px;
    height: 62px;
    background: rgba(28,28,30,0.55);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 999px;
    box-shadow: 0 10px 34px rgba(0,0,0,0.38);
  }
  .nav-logo {
    display: flex; align-items: center; gap: 12px;
    text-decoration: none;
  }
  .nav-logo-img {
    height: 36px;
    width: auto;
    display: block;
  }
  .nav-links {
    display: flex; gap: 36px; list-style: none;
  }
  .nav-links a {
    font-size: 13px; font-weight: 500; letter-spacing: 0.06em;
    color: rgba(255,255,255,0.65); text-decoration: none; text-transform: uppercase;
    transition: color 0.2s; position: relative; padding-bottom: 2px;
  }
  .nav-links a::after {
    content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
    height: 1px; background: var(--terracotta);
    transform: scaleX(0); transform-origin: left; transition: transform 0.25s ease;
  }
  .nav-links a:hover { color: var(--white); }
  .nav-links a:hover::after { transform: scaleX(1); }
  .nav-cta {
    display: flex; gap: 12px;
  }
  .btn-nav {
    padding: 9px 22px; font-size: 13px; font-weight: 600; font-family: var(--font);
    letter-spacing: 0.04em; border-radius: 999px; cursor: pointer;
    text-decoration: none; transition: all 0.2s;
    border: 1px solid transparent;
  }
  .btn-nav-ghost {
    background: transparent; color: rgba(255,255,255,0.75);
    border-color: rgba(255,255,255,0.2);
  }
  .btn-nav-ghost:hover { border-color: rgba(255,255,255,0.5); color: var(--white); }
  .btn-nav-primary {
    background: var(--terracotta); color: var(--white); border-color: var(--terracotta);
  }
  .btn-nav-primary:hover { background: var(--terracotta-light); }

  /* HERO */
  .hero {
    background: var(--graphite);
    display: grid; grid-template-columns: 1fr 1fr;
    position: relative; min-height: 100svh;
    overflow: hidden;
  }

  /* Ambient glow orbs */
  .hero-orb {
    position: absolute; border-radius: 50%;
    pointer-events: none; z-index: 1;
    will-change: transform;
  }
  .hero-orb-1 {
    width: 75vw; height: 75vw; max-width: 900px; max-height: 900px;
    right: -15vw; top: -20vh;
    background: radial-gradient(circle at 40% 40%, rgba(181,82,42,0.22) 0%, transparent 65%);
    filter: blur(70px);
    animation: orbDrift1 14s ease-in-out infinite;
  }
  .hero-orb-2 {
    width: 55vw; height: 55vw; max-width: 650px; max-height: 650px;
    left: -8vw; bottom: -15vh;
    background: radial-gradient(circle at 60% 50%, rgba(181,82,42,0.13) 0%, transparent 65%);
    filter: blur(90px);
    animation: orbDrift2 18s ease-in-out infinite;
  }
  @keyframes orbDrift1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(-3vw, 4vh) scale(1.06); }
    66%  { transform: translate(2vw, -3vh) scale(0.96); }
  }
  @keyframes orbDrift2 {
    0%, 100% { transform: translate(0, 0); }
    50%  { transform: translate(4vw, -3vh); }
  }

  /* Film grain */
  .hero-grain {
    position: absolute; inset: -50%; z-index: 2; pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' 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;
    animation: grainAnim 0.4s steps(1) infinite;
  }
  @keyframes grainAnim {
    0%  { transform: translate(0,0); }
    20% { transform: translate(-3%,-4%); }
    40% { transform: translate(4%,3%); }
    60% { transform: translate(-2%,5%); }
    80% { transform: translate(5%,-2%); }
    100%{ transform: translate(0,0); }
  }

  /* Video glow behind video */
  .hero-video-glow {
    position: absolute;
    width: 70%; height: 70%;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(181,82,42,0.32) 0%, transparent 70%);
    filter: blur(50px);
    pointer-events: none; z-index: 0;
    animation: glowPulse 5s ease-in-out infinite;
  }
  @keyframes glowPulse {
    0%, 100% { opacity: 0.7; transform: translate(-50%,-50%) scale(1); }
    50%       { opacity: 1;   transform: translate(-50%,-50%) scale(1.12); }
  }

  /* Architectural grid overlay */
  .hero::before {
    content: '';
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image:
      linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 72px 72px;
  }

  /* Bottom terracotta accent line */
  .hero::after {
    content: '';
    position: absolute; bottom: 0; left: 0; z-index: 3;
    height: 2px; width: 0;
    background: linear-gradient(to right, var(--terracotta), transparent);
    animation: heroLineIn 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
  }
  @keyframes heroLineIn {
    to { width: 40%; }
  }

  /* Hero entry animations */
  @keyframes heroUp {
    from { opacity: 0; transform: translateY(40px); }
    to   { opacity: 1; transform: none; }
  }
  @keyframes heroFade {
    from { opacity: 0; }
    to   { opacity: 1; }
  }

  .hero-badge    { animation: heroUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.05s both; }
  .hero-subtitle { animation: heroUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.62s both; }
  .hero-tags     { animation: heroUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.74s both; }
  .hero-actions  { animation: heroUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.86s both; }
  .hero-stats    { animation: heroUp 0.8s cubic-bezier(0.16,1,0.3,1) 1s both; }

  /* Masked line reveal on hero title */
  @keyframes lineReveal {
    from { transform: translateY(105%); }
    to   { transform: none; }
  }
  .htl {
    display: block; overflow: hidden; line-height: 1.08;
  }
  .hti {
    display: block;
    animation: lineReveal 1s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .htl:nth-child(1) .hti { animation-delay: 0.1s; }
  .htl:nth-child(2) .hti { animation-delay: 0.24s; }
  .htl:nth-child(3) .hti { animation-delay: 0.38s; }
  .htl:nth-child(4) .hti { animation-delay: 0.52s; }
  .hero-title-accent .hti { color: var(--terracotta-light); }

  /* Ghost watermark */
  .hero-watermark {
    position: absolute; bottom: 60px; right: 0; z-index: 0;
    font-size: clamp(100px, 16vw, 220px); font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px rgba(255,255,255,0.06);
    letter-spacing: -0.06em;
    pointer-events: none; user-select: none; line-height: 1;
    animation: watermarkIn 1.8s cubic-bezier(0.16,1,0.3,1) 0.6s both;
    white-space: nowrap; overflow: hidden;
    transform-origin: right bottom;
  }
  @keyframes watermarkIn {
    from { opacity: 0; transform: translateX(40px) scale(0.96); }
    to   { opacity: 1; transform: none; }
  }

  /* Scroll indicator */
  .hero-scroll {
    position: absolute; bottom: 36px; left: 50%;
    transform: translateX(-50%); z-index: 3;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    animation: heroFade 1s ease 1.3s both;
  }
  .hero-scroll-label {
    font-size: 9px; font-weight: 700; letter-spacing: 0.22em;
    color: rgba(255,255,255,0.25); text-transform: uppercase;
  }
  .hero-scroll-line {
    width: 1px; height: 44px;
    background: rgba(255,255,255,0.1);
    position: relative; overflow: hidden;
  }
  .hero-scroll-line::after {
    content: ''; position: absolute; top: -100%; left: 0;
    width: 100%; height: 50%; background: var(--terracotta);
    animation: scrollDrop 2s cubic-bezier(0.4,0,0.6,1) 1.6s infinite;
  }
  @keyframes scrollDrop {
    0%   { top: -50%; }
    100% { top: 110%; }
  }

  /* Left accent bar */
  .hero-left::before {
    content: '';
    position: absolute; left: 0; top: 28%; bottom: 28%;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--terracotta) 50%, transparent);
    opacity: 0.65;
  }

  .hero-left {
    padding: 80px 5vw 32px 8vw;
    display: flex; flex-direction: column; justify-content: center;
    position: relative; z-index: 2;
  }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(181,82,42,0.15); border: 1px solid rgba(181,82,42,0.3);
    color: var(--terracotta-light); font-size: 12px; font-weight: 600;
    letter-spacing: 0.15em; text-transform: uppercase;
    padding: 7px 16px; border-radius: 2px; width: fit-content;
    margin-bottom: 36px;
  }
  .hero-badge::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--terracotta-light);
  }
  .hero-title {
    font-size: clamp(40px, 4.8vw, 68px);
    font-weight: 800; line-height: 1.04; letter-spacing: -0.03em;
    color: var(--white); margin-bottom: 16px;
  }
  .hero-title span { display: block; }
  .hero-subtitle {
    font-size: clamp(16px, 1.8vw, 21px);
    font-weight: 300; color: rgba(255,255,255,0.45);
    margin-bottom: 40px; line-height: 1.5;
    letter-spacing: 0.01em;
  }
  .hero-tags {
    display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 48px;
  }
  .hero-tag {
    padding: 7px 16px; border: 1px solid rgba(255,255,255,0.15);
    font-size: 12px; font-weight: 500; letter-spacing: 0.08em;
    color: rgba(255,255,255,0.6); border-radius: 2px;
    text-transform: uppercase;
  }
  .hero-actions {
    display: flex; flex-wrap: wrap; gap: 12px;
  }
  .btn {
    padding: 14px 28px; font-size: 13px; font-weight: 600; font-family: var(--font);
    letter-spacing: 0.06em; text-transform: uppercase; border-radius: 2px;
    cursor: pointer; text-decoration: none; display: inline-flex;
    align-items: center; gap: 8px; transition: all 0.22s; border: 1px solid transparent;
  }
  .btn-primary {
    background: var(--terracotta); color: var(--white); border-color: var(--terracotta);
    position: relative; overflow: hidden;
  }
  .btn-primary::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.12) 50%, transparent 60%);
    transform: translateX(-100%); transition: transform 0.55s ease;
  }
  .btn-primary:hover { background: var(--terracotta-light); transform: translateY(-1px); }
  .btn-primary:hover::after { transform: translateX(100%); }
  .btn-secondary {
    background: transparent; color: rgba(255,255,255,0.8);
    border-color: rgba(255,255,255,0.25);
  }
  .btn-secondary:hover { border-color: rgba(255,255,255,0.6); color: var(--white); }
  .btn-wa {
    background: #25D366; color: var(--white); border-color: #25D366;
  }
  .btn-wa:hover { background: #1fb85a; }
  .hero-right {
    position: relative;
    overflow: hidden;
  }
  .hero-visual-video {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: auto;
    height: auto;
    max-width: 80%;
    max-height: 70vh;
    object-fit: contain;
    mix-blend-mode: screen;
    filter: contrast(1.8) brightness(1.1);
    animation: videoFadeIn 1.5s ease forwards;
  }
  @keyframes videoFadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
  }
  .hero-stats {
    display: flex; gap: 48px;
    padding: 32px 0 48px 8vw;
    grid-column: 1 / 2;
  }
  .hero-stat-num {
    font-size: 32px; font-weight: 800; color: var(--white);
    letter-spacing: -0.02em; line-height: 1;
  }
  .hero-stat-label {
    font-size: 12px; font-weight: 400; color: rgba(255,255,255,0.45);
    letter-spacing: 0.1em; text-transform: uppercase; margin-top: 6px;
  }

  /* SECTION BASICS */
  section { padding: 100px 8vw; }
  .section-eyebrow {
    font-size: 11px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase;
    color: var(--terracotta); margin-bottom: 16px;
  }
  .section-title {
    font-size: clamp(30px, 3.4vw, 52px); font-weight: 800;
    line-height: 1.08; letter-spacing: -0.025em; color: var(--graphite);
  }
  .section-title-white { color: var(--white); }
  .section-body {
    font-size: 16px; font-weight: 400; color: var(--mid-gray);
    line-height: 1.7; max-width: 520px; margin-top: 20px;
  }
  .section-body-white { color: rgba(255,255,255,0.55); }
  .divider-line {
    width: 48px; height: 2px; background: var(--terracotta); margin-top: 24px;
  }

  /* CATALOG */
  .catalog-section { background: #0E0C0A; }
  .catalog-header {
    display: flex; align-items: flex-end; justify-content: space-between;
    margin-bottom: 52px;
  }
  .catalog-header .section-title { color: var(--white); }
  .catalog-filters {
    display: flex; gap: 8px; flex-wrap: wrap; margin-top: 32px;
  }
  .filter-btn {
    padding: 8px 18px; font-size: 12px; font-weight: 600; font-family: var(--font);
    letter-spacing: 0.08em; text-transform: uppercase; border-radius: 2px;
    cursor: pointer; transition: all 0.18s;
    background: transparent; color: rgba(255,255,255,0.35);
    border: 1px solid rgba(255,255,255,0.12);
  }
  .filter-btn.active, .filter-btn:hover {
    background: var(--terracotta); color: var(--white); border-color: var(--terracotta);
  }
  .catalog-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 3px;
    margin-top: 8px;
  }
  .product-card {
    background: var(--graphite);
    position: relative; overflow: hidden;
    cursor: pointer; display: flex; flex-direction: column;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.45s ease;
  }
  /* Left accent bar reveals on hover */
  .product-card::before {
    content: ''; position: absolute; top: 0; left: 0; bottom: 0; width: 2px;
    background: var(--terracotta); z-index: 6;
    transform: scaleY(0); transform-origin: bottom;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }
  .product-card::after { content: none; }
  .product-card:hover { transform: translateY(-6px); box-shadow: 0 28px 72px rgba(0,0,0,0.45); }
  .product-card:hover::before { transform: scaleY(1); }

  /* Visual: perspective floor effect */
  .card-img-wrap {
    overflow: hidden; aspect-ratio: 16/10; flex-shrink: 0;
    position: relative;
  }
  /* Cinematic gradient — heavy at bottom, fades to transparent */
  .card-img-wrap::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(
      to top,
      rgba(10,8,6,0.97) 0%,
      rgba(10,8,6,0.55) 26%,
      rgba(10,8,6,0.08) 58%,
      transparent 78%
    );
    z-index: 1; pointer-events: none;
  }
  .card-img-placeholder {
    width: 100%; height: 100%;
    transform: perspective(480px) rotateX(28deg) scale(1.22);
    transform-origin: center bottom;
    transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex; align-items: center; justify-content: center;
  }
  .product-card:hover .card-img-placeholder {
    transform: perspective(480px) rotateX(19deg) scale(1.28);
  }

  /* Text overlaid on image */
  .card-overlay {
    position: absolute; bottom: 0; left: 0; right: 0; z-index: 2;
    padding: 14px 20px 18px;
  }
  .card-category {
    font-size: 9px; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--terracotta-light); margin-bottom: 5px;
  }
  .card-name {
    font-size: 19px; font-weight: 800; color: var(--white);
    letter-spacing: -0.02em; line-height: 1.12;
  }
  /* Application context */
  .card-use {
    font-size: 10px; color: rgba(255,255,255,0.36);
    letter-spacing: 0.04em; margin-top: 7px; line-height: 1.45;
  }

  /* Dark footer strip */
  .card-footer {
    padding: 14px 20px 18px;
    background: #100e0c;
    border-top: 1px solid rgba(255,255,255,0.05);
    display: flex; flex-direction: column; gap: 11px;
  }
  .card-specs { display: flex; flex-wrap: wrap; gap: 5px; }
  .card-spec {
    font-size: 10px; font-weight: 500; padding: 3px 8px;
    border: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.32); border-radius: 2px; letter-spacing: 0.04em;
  }
  .card-footer-row {
    display: flex; align-items: center; justify-content: space-between;
  }
  .card-colors { display: flex; gap: 5px; }
  .color-dot {
    width: 13px; height: 13px; border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.2); cursor: pointer;
    transition: transform 0.18s;
  }
  .color-dot:hover { transform: scale(1.3); }
  .card-btn {
    display: inline-flex; align-items: center; gap: 5px;
    font-size: 10px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
    color: rgba(255,255,255,0.28); text-decoration: none; transition: color 0.22s;
  }
  .product-card:hover .card-btn { color: var(--terracotta-light); }
  .card-arrow { font-size: 11px; transition: transform 0.22s; }
  .product-card:hover .card-arrow { transform: translateX(4px); }
  .card-new-badge {
    position: absolute; top: 13px; right: 13px; z-index: 5;
    background: var(--terracotta); color: var(--white);
    font-size: 9px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase;
    padding: 4px 10px; border-radius: 2px;
  }

  /* WHY US */
  .why-section {
    background: var(--graphite);
  }
  .why-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1px;
    margin-top: 60px; border: 1px solid rgba(255,255,255,0.06);
  }
  .why-item {
    padding: 36px 32px;
    border-right: 1px solid rgba(255,255,255,0.06);
    transition: background 0.25s;
  }
  .why-item:hover { background: rgba(255,255,255,0.03); }
  .why-num {
    font-size: 11px; font-weight: 700; letter-spacing: 0.2em;
    color: var(--terracotta); margin-bottom: 24px; font-variant-numeric: tabular-nums;
  }
  .why-icon {
    width: 44px; height: 44px; margin-bottom: 20px;
    display: flex; align-items: center; justify-content: center;
  }
  .why-icon svg { width: 32px; height: 32px; stroke: var(--bronze-light); fill: none; stroke-width: 1.5; }
  .why-title {
    font-size: 16px; font-weight: 700; color: var(--white);
    letter-spacing: -0.01em; margin-bottom: 10px; line-height: 1.3;
  }
  .why-desc {
    font-size: 14px; font-weight: 400; color: rgba(255,255,255,0.45);
    line-height: 1.65;
  }

  /* COLORS & TEXTURES */
  .colors-section { background: var(--concrete-light); position: relative; }
  .palette-scroll-hint { display: none; }
  .palette-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 3px; margin-top: 52px;
  }
  .palette-item {
    cursor: pointer; transition: transform 0.2s;
  }
  .palette-item:hover { transform: translateY(-3px); }
  .palette-swatch {
    aspect-ratio: 1; display: flex; align-items: flex-end;
    padding: 12px;
  }
  .palette-name {
    font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
    padding: 12px 12px 16px;
    background: var(--white); color: var(--graphite);
  }
  .palette-hex {
    font-size: 10px; color: var(--light-gray); margin-top: 2px; letter-spacing: 0.05em;
  }

  /* HOW TO ORDER */
  .order-section { background: var(--white); }
  .steps-row {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 0; margin-top: 64px; position: relative;
  }
  .steps-row::before {
    content: ''; position: absolute; top: 36px; left: 10%; right: 10%;
    height: 1px; background: linear-gradient(to right, transparent, var(--concrete), var(--concrete), transparent);
    z-index: 0;
  }
  .step {
    display: flex; flex-direction: column; align-items: center;
    text-align: center; padding: 0 16px; position: relative; z-index: 1;
  }
  .step-num {
    width: 72px; height: 72px; border-radius: 50%;
    background: var(--white); border: 1px solid var(--concrete);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 800; color: var(--graphite);
    letter-spacing: -0.02em; margin-bottom: 20px;
    transition: all 0.25s;
  }
  .step:hover .step-num {
    background: var(--terracotta); color: var(--white); border-color: var(--terracotta);
  }
  .step-title {
    font-size: 14px; font-weight: 700; color: var(--graphite);
    letter-spacing: -0.01em; margin-bottom: 8px;
  }
  .step-desc {
    font-size: 13px; color: var(--mid-gray); line-height: 1.6;
  }

  /* PROJECTS GALLERY */
  .projects-section { background: var(--graphite-80); padding-bottom: 0; }
  .projects-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: 300px 240px;
    gap: 3px; margin-top: 52px;
  }
  .project-cell {
    overflow: hidden; position: relative; cursor: pointer;
  }
  .project-cell-inner {
    width: 100%; height: 100%;
    transition: transform 0.4s ease;
    display: flex; align-items: flex-end;
    padding: 24px;
  }
  .project-cell:hover .project-cell-inner { transform: scale(1.03); }
  .project-cell:first-child { grid-row: span 2; }
  .project-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(28,28,30,0.75) 0%, transparent 60%);
  }
  .project-label {
    position: relative; z-index: 1;
  }
  .project-type {
    font-size: 10px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--terracotta-light); margin-bottom: 4px;
  }
  .project-name {
    font-size: 16px; font-weight: 700; color: var(--white); letter-spacing: -0.01em;
  }

  /* FAQ */
  .faq-section { background: var(--concrete-light); }
  .faq-list { margin-top: 52px; max-width: 800px; }
  .faq-item {
    border-bottom: 1px solid var(--concrete);
    cursor: pointer;
  }
  .faq-question {
    display: flex; align-items: center; justify-content: space-between;
    padding: 24px 0; font-size: 16px; font-weight: 600;
    color: var(--graphite); user-select: none;
  }
  .faq-icon {
    width: 28px; height: 28px; border: 1px solid var(--concrete);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: var(--mid-gray); border-radius: 2px;
    transition: all 0.22s; flex-shrink: 0; margin-left: 16px;
    font-weight: 300;
  }
  .faq-item.open .faq-icon {
    background: var(--terracotta); border-color: var(--terracotta); color: var(--white);
    transform: rotate(45deg);
  }
  .faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
    font-size: 15px; color: var(--mid-gray); line-height: 1.7;
  }
  .faq-answer p { padding-bottom: 24px; }
  .faq-item.open .faq-answer { max-height: 300px; }

  /* CLIENTS */
  .clients-section { background: var(--white); padding: 60px 8vw; }
  .clients-label {
    font-size: 11px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--light-gray); text-align: center; margin-bottom: 36px;
  }
  .clients-row {
    display: flex; align-items: center; justify-content: center;
    flex-wrap: wrap; gap: 48px;
  }
  .client-name {
    font-size: 15px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--light-gray); opacity: 0.55; transition: opacity 0.2s;
  }
  .client-name:hover { opacity: 1; }

  /* CONTACT */
  .contact-section {
    background: var(--graphite); display: grid; grid-template-columns: 1fr 1fr;
    gap: 0; padding: 0;
  }
  .contact-left {
    padding: 100px 8vw;
    display: flex; flex-direction: column; justify-content: center;
  }
  .contact-right {
    background: var(--graphite-60); padding: 100px 6vw;
    display: flex; flex-direction: column; justify-content: center; gap: 28px;
  }
  .contact-info-item { display: flex; gap: 16px; align-items: flex-start; }
  .contact-info-icon {
    width: 40px; height: 40px; background: rgba(255,255,255,0.05);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    border-radius: 2px;
  }
  .contact-info-icon svg { width: 18px; height: 18px; stroke: var(--bronze-light); fill: none; stroke-width: 1.5; }
  .contact-info-label {
    font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--terracotta); margin-bottom: 4px;
  }
  .contact-info-val {
    font-size: 15px; font-weight: 500; color: rgba(255,255,255,0.8);
  }
  .contact-info-val a { color: inherit; text-decoration: none; }
  .contact-info-val a:hover { color: var(--white); }
  .contact-form { margin-top: 40px; display: flex; flex-direction: column; gap: 16px; }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .form-field {
    display: flex; flex-direction: column; gap: 8px;
  }
  .form-label {
    font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
    color: rgba(255,255,255,0.4);
  }
  .form-input {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    color: var(--white); font-family: var(--font); font-size: 15px; font-weight: 400;
    padding: 14px 18px; border-radius: 2px; outline: none; transition: border-color 0.2s;
  }
  .form-input:focus { border-color: var(--terracotta); }
  .form-input::placeholder { color: rgba(255,255,255,0.25); }
  .form-select {
    appearance: none; cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='rgba(255,255,255,0.3)' stroke-width='1.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 16px center;
  }
  .form-input option { background: var(--graphite-80); }

  /* FOOTER */
  footer {
    background: #111113; padding: 48px 8vw 32px;
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 24px;
  }
  .footer-logo { font-size: 16px; font-weight: 800; letter-spacing: 0.14em; color: var(--white); }
  .footer-copy { font-size: 12px; color: rgba(255,255,255,0.3); letter-spacing: 0.06em; }
  .footer-links { display: flex; gap: 24px; }
  .footer-links a { font-size: 12px; color: rgba(255,255,255,0.4); text-decoration: none; letter-spacing: 0.06em; }
  .footer-links a:hover { color: rgba(255,255,255,0.8); }

  /* CERTIFICATES */
  .certs-section { background: var(--white); }
  .certs-row {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2px; margin-top: 52px;
  }
  .cert-card {
    background: var(--concrete-light); padding: 36px 28px;
    display: flex; flex-direction: column; align-items: center; text-align: center;
    transition: background 0.2s;
  }
  .cert-card:hover { background: var(--concrete); }
  .cert-icon { width: 56px; height: 56px; margin-bottom: 16px; }
  .cert-icon svg { width: 56px; height: 56px; }
  .cert-title { font-size: 14px; font-weight: 700; color: var(--graphite); margin-bottom: 6px; }
  .cert-desc { font-size: 12px; color: var(--mid-gray); line-height: 1.6; }

  /* CALC BANNER */
  .calc-banner {
    background: var(--terracotta);
    padding: 64px 8vw;
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 32px;
  }
  .calc-banner-text .eyebrow {
    font-size: 11px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase;
    color: rgba(255,255,255,0.65); margin-bottom: 12px;
  }
  .calc-banner-text h2 {
    font-size: clamp(24px, 3vw, 38px); font-weight: 800; color: var(--white);
    letter-spacing: -0.02em; line-height: 1.15;
  }
  .calc-widget {
    display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end;
  }
  .calc-field { display: flex; flex-direction: column; gap: 8px; }
  .calc-label {
    font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
    color: rgba(255,255,255,0.7);
  }
  .calc-input {
    background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3);
    color: var(--white); font-family: var(--font); font-size: 16px; font-weight: 600;
    padding: 13px 18px; border-radius: 2px; outline: none; width: 140px;
  }
  .calc-input::placeholder { color: rgba(255,255,255,0.4); }
  .calc-input:focus { border-color: rgba(255,255,255,0.7); }
  .calc-result {
    background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.2);
    padding: 13px 24px; border-radius: 2px; min-width: 180px;
    font-size: 15px; font-weight: 600; color: var(--white);
  }
  .calc-result span { display: block; font-size: 22px; font-weight: 800; }

  /* CALCULATOR SECTION */
  .calc-section {
    background: var(--graphite-80);
    padding: 100px 8vw;
  }
  .calc-section-header { margin-bottom: 56px; }
  .calc-section-header .section-body { margin-top: 12px; max-width: 480px; }

  /* Stepper */
  .calc-stepper {
    display: flex; align-items: center; gap: 0;
    margin-bottom: 52px;
  }
  .csi {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    flex-shrink: 0;
  }
  .csi-num {
    width: 36px; height: 36px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 700; color: rgba(255,255,255,0.3);
    transition: all 0.3s;
  }
  .csi-lbl {
    font-size: 10px; font-weight: 600; letter-spacing: 0.1em;
    text-transform: uppercase; color: rgba(255,255,255,0.25);
    transition: color 0.3s;
  }
  .csi.active .csi-num { border-color: var(--terracotta); color: var(--white); background: var(--terracotta); }
  .csi.active .csi-lbl { color: var(--white); }
  .csi.done .csi-num { border-color: var(--terracotta); color: var(--terracotta); background: rgba(181,82,42,0.12); }
  .csi.done .csi-lbl { color: var(--terracotta); }
  .csi-line { flex: 1; height: 1px; background: rgba(255,255,255,0.1); margin: 0 12px; margin-bottom: 22px; }

  /* Panels */
  .calc-panel { display: none; }
  .calc-panel.active { display: block; }
  .calc-back-btn {
    background: none; border: none; cursor: pointer;
    font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
    color: rgba(255,255,255,0.4); padding: 0; margin-bottom: 32px;
    transition: color 0.2s; display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font);
  }
  .calc-back-btn:hover { color: var(--white); }

  /* Step 1: Type cards */
  .calc-type-row {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px;
  }
  .calc-type-btn {
    -webkit-appearance: none; appearance: none;
    background: var(--graphite); border: 1px solid rgba(255,255,255,0.07);
    padding: 36px 24px; cursor: pointer; text-align: center;
    display: flex; flex-direction: column; align-items: center; gap: 14px;
    transition: all 0.25s; font-family: var(--font);
    color: var(--white);
    position: relative; overflow: hidden;
  }
  .calc-type-btn::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0;
    height: 2px; background: var(--terracotta);
    transform: scaleX(0); transition: transform 0.3s ease;
  }
  .calc-type-btn:hover { background: var(--graphite-60); border-color: rgba(255,255,255,0.15); }
  .calc-type-btn:hover::after { transform: scaleX(1); }
  .ctb-icon { color: rgba(255,255,255,0.5); transition: color 0.25s; }
  .ctb-icon svg { width: 48px; height: 48px; }
  .calc-type-btn:hover .ctb-icon { color: var(--terracotta-light); }
  .ctb-label { font-size: 14px; font-weight: 700; color: var(--white); line-height: 1.3; }
  .ctb-sub { font-size: 11px; color: rgba(255,255,255,0.35); letter-spacing: 0.06em; }

  /* Step 2: Collection grid */
  .calc-coll-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 2px;
  }
  .calc-coll-card {
    background: var(--graphite); border: 1px solid rgba(255,255,255,0.07);
    padding: 20px; cursor: pointer; text-align: left;
    transition: all 0.22s;
    color: var(--white);
    position: relative; overflow: hidden;
    min-height: 80px;
  }
  .calc-coll-card::after {
    content: ''; position: absolute; top: 0; left: 0; right: 0;
    height: 2px; background: var(--terracotta);
    transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
  }
  .calc-coll-card:hover { background: var(--graphite-60); }
  .calc-coll-card:hover::after { transform: scaleX(1); }
  .calc-coll-colors {
    display: flex; gap: 5px; margin-bottom: 14px;
  }
  .calc-coll-colors span {
    width: 16px; height: 16px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.2);
    display: inline-block;
  }
  .calc-coll-name {
    font-size: 14px; font-weight: 700; color: var(--white); margin-bottom: 4px;
  }
  .calc-coll-hint {
    font-size: 11px; color: rgba(255,255,255,0.35); letter-spacing: 0.03em;
  }

  /* Step 3 layout */
  .calc-p3-inner {
    display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start;
  }
  .calc-prod-info { margin-bottom: 28px; }
  .calc-prod-name {
    font-size: 22px; font-weight: 800; color: var(--white);
    letter-spacing: -0.02em; margin-bottom: 6px;
  }
  .calc-prod-spec {
    font-size: 12px; color: rgba(255,255,255,0.4); letter-spacing: 0.04em;
  }
  .calc-inp-group { margin-bottom: 24px; }
  .calc-inp-label {
    display: block; font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
    text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 10px;
  }
  .calc-inp {
    width: 100%; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    color: var(--white); font-family: var(--font);
    font-size: 28px; font-weight: 800; letter-spacing: -0.02em;
    padding: 16px 20px; border-radius: 2px; outline: none;
    transition: border-color 0.2s;
  }
  .calc-inp:focus { border-color: var(--terracotta); }
  .calc-inp::placeholder { color: rgba(255,255,255,0.18); }

  /* Color picker */
  .calc-colors-wrap { display: block; }
  .calc-color-label {
    font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
    color: rgba(255,255,255,0.4); margin-bottom: 10px;
  }
  .calc-color-label span { color: var(--white); font-weight: 700; }
  .calc-color-dots { display: flex; gap: 8px; flex-wrap: wrap; }
  .calc-cdot {
    width: 28px; height: 28px; border-radius: 50%;
    cursor: pointer; border: 2px solid transparent;
    outline: 2px solid transparent; transition: all 0.18s;
  }
  .calc-cdot:hover { transform: scale(1.15); }
  .calc-cdot.active { border-color: var(--white); outline-color: var(--terracotta); }

  /* Results */
  .calc-res-empty {
    font-size: 14px; color: rgba(255,255,255,0.25); padding: 40px 0;
    letter-spacing: 0.04em;
  }
  .calc-res-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
    background: rgba(255,255,255,0.04);
  }
  .calc-res-item {
    background: var(--graphite-80); padding: 20px 22px;
  }
  .calc-res-item.big { background: var(--graphite); }
  .crv {
    font-size: 22px; font-weight: 800; color: var(--white);
    letter-spacing: -0.02em; line-height: 1;
  }
  .calc-res-item.big .crv { font-size: 32px; color: var(--terracotta-light); }
  .crl {
    font-size: 10px; font-weight: 600; letter-spacing: 0.1em;
    text-transform: uppercase; color: rgba(255,255,255,0.35);
    margin-top: 6px;
  }
  .calc-cta-row {
    display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap;
  }
  .calc-cta-row .btn { font-size: 12px; padding: 13px 22px; }

  /* VIDEO REEL */
  .reel-section {
    padding: 0;
    background: var(--graphite);
  }
  .reel-video-wrap {
    position: relative;
    width: 100%; aspect-ratio: 16/9;
    background: #111;
  }
  .reel-video {
    width: 100%; height: 100%;
    object-fit: cover; display: block;
  }
  .reel-play-btn { display: none; }

  /* CATALOG EXPAND */
  .catalog-hidden { display: none; }
  .catalog-expand-wrap {
    display: flex; justify-content: center; margin-top: 40px;
  }
  .catalog-expand-btn {
    color: rgba(255,255,255,0.5); border-color: rgba(255,255,255,0.15);
    background: transparent;
    min-width: 220px; justify-content: center;
  }
  .catalog-expand-btn:hover { color: var(--white); border-color: rgba(255,255,255,0.4); }

  /* SCROLL ANIMATION */
  .reveal {
    opacity: 0; transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }
  .reveal.visible { opacity: 1; transform: none; }
  .reveal-delay-1 { transition-delay: 0.12s; }
  .reveal-delay-2 { transition-delay: 0.24s; }
  .reveal-delay-3 { transition-delay: 0.36s; }

  /* BURGER */
  .burger {
    display: none;
    flex-direction: column; justify-content: center; gap: 5px;
    width: 40px; height: 40px; background: none; border: none;
    cursor: pointer; padding: 4px; z-index: 101;
  }
  .burger span {
    display: block; height: 2px; background: var(--white);
    border-radius: 2px; transition: all 0.3s ease;
    transform-origin: center;
  }
  .burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .burger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* MOBILE MENU */
  .mobile-menu {
    display: none;
    position: fixed; inset: 0; z-index: 99;
    background: rgba(18,18,20,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column; justify-content: center; align-items: center;
    gap: 0;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .mobile-menu.open {
    opacity: 1; pointer-events: all;
  }
  .mobile-menu ul {
    list-style: none; text-align: center; margin-bottom: 48px;
  }
  .mobile-menu ul li { margin-bottom: 8px; }
  .mobile-menu ul a {
    font-size: clamp(28px, 8vw, 42px); font-weight: 700;
    color: rgba(255,255,255,0.85); text-decoration: none;
    letter-spacing: -0.01em; line-height: 1.4;
    transition: color 0.2s;
    display: block; padding: 8px 0;
  }
  .mobile-menu ul a:hover { color: var(--terracotta-light); }
  .mobile-menu-cta {
    display: flex; flex-direction: column; gap: 12px; width: 80%; max-width: 280px;
  }
  .mobile-menu-cta .btn { justify-content: center; width: 100%; }

  /* RESPONSIVE */
  @media (max-width: 900px) {
    /* NAV */
    nav { padding: 0 5vw; height: 60px; }
    .nav-logo-img { height: 28px; }
    .nav-links { display: none; }
    .nav-cta { display: none; }
    .burger { display: flex; }
    .mobile-menu { display: flex; }

    /* HERO MOBILE — видео как фон */
    .hero {
      display: flex; flex-direction: column;
      min-height: 100svh; grid-template-columns: none;
      overflow: hidden;
    }
    .hero-right {
      position: absolute; inset: 0; height: 100%;
      z-index: 0;
    }
    .hero-visual-video {
      position: absolute; inset: 0;
      width: 100%; height: 100%;
      max-width: none; max-height: none;
      object-fit: cover; object-position: center;
      mix-blend-mode: normal;
      filter: brightness(0.22) saturate(0.7);
      transform: none;
      top: auto; left: auto;
    }
    .hero-video-glow { display: none; }
    /* Dark vignette over video */
    .hero::before {
      background-image: none;
      background: linear-gradient(to bottom,
        rgba(28,28,30,0.85) 0%,
        rgba(28,28,30,0.3) 40%,
        rgba(28,28,30,0.6) 70%,
        rgba(28,28,30,1) 100%);
      z-index: 1;
    }
    .hero::after { display: none; }
    .hero-left::before { display: none; }
    .hero-orb-1 {
      width: 100vw; height: 100vw; right: -30vw; top: -20vw; z-index: 1;
    }
    .hero-orb-2 { display: none; }
    .hero-left {
      position: relative; z-index: 3;
      padding: 110px 6vw 0;
      flex: 1;
      display: flex; flex-direction: column; align-items: flex-start;
    }
    .hero-title { font-size: clamp(32px, 8vw, 52px); }
    .hero-subtitle { font-size: 15px; margin-bottom: 24px; color: rgba(255,255,255,0.55); }
    .hero-tags { gap: 6px; margin-bottom: 28px; }
    .hero-tag { font-size: 10px; padding: 5px 10px; letter-spacing: 0.06em; }
    .hero-actions {
      flex-direction: column; align-items: stretch; gap: 10px; width: 100%;
    }
    .hero-actions .btn { justify-content: center; padding: 15px 20px; font-size: 13px; }
    .hero-stats {
      position: relative; z-index: 3;
      gap: 0; flex-wrap: nowrap;
      display: grid; grid-template-columns: repeat(3, 1fr);
      padding: 20px 6vw 36px;
      grid-column: auto;
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-top: 32px;
    }
    .hero-stat-num { font-size: 22px; }
    .hero-watermark {
      display: block; z-index: 1;
      font-size: clamp(80px, 28vw, 140px);
      bottom: 106px; right: 16px;
      -webkit-text-stroke: 1px rgba(255,255,255,0.04);
    }
    .hero-scroll { display: none; }

    /* REST */
    .steps-row {
      display: flex; flex-direction: column;
      gap: 0; margin-top: 40px;
      position: relative;
    }
    .steps-row::before {
      content: '';
      position: absolute; left: 35px; top: 36px; bottom: 36px;
      width: 1px;
      background: linear-gradient(to bottom, transparent, var(--concrete) 10%, var(--concrete) 90%, transparent);
    }
    .step {
      flex-direction: row; align-items: flex-start;
      text-align: left; padding: 0 0 36px 0; gap: 20px;
    }
    .step:last-child { padding-bottom: 0; }
    .step-num {
      width: 52px; height: 52px; font-size: 14px;
      flex-shrink: 0;
      background: var(--white);
    }
    .step-title { margin-top: 4px; }
    .step-content { flex: 1; }
    .contact-section { grid-template-columns: 1fr; }
    .contact-left, .contact-right { padding: 64px 6vw; }
    .projects-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; gap: 5px; margin-top: 1px; }
    .project-cell:first-child { grid-row: auto; grid-column: span 2; }
    section { padding: 72px 6vw; }
    /* HORIZONTAL PALETTE SCROLL */
    .colors-section { padding-bottom: 48px; }
    .palette-scroll-hint {
      display: flex; align-items: center; gap: 6px;
      font-size: 12px; font-weight: 600; letter-spacing: 0.1em;
      color: var(--mid-gray); text-transform: uppercase;
      margin-top: 20px;
      animation: nudge 1.5s ease-in-out infinite;
    }
    .palette-scroll-hint span { font-size: 16px; }
    @keyframes nudge {
      0%, 100% { transform: translateX(0); }
      50% { transform: translateX(6px); }
    }
    .palette-wrap {
      position: relative;
    }
    .palette-wrap::after {
      content: '';
      position: absolute; top: 0; right: 0;
      width: 60px; height: 100%;
      background: linear-gradient(to right, transparent, var(--concrete-light));
      pointer-events: none;
    }
    .palette-grid {
      display: flex;
      flex-direction: row;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
      gap: 10px;
      margin-top: 32px;
      padding-bottom: 16px;
    }
    .palette-grid::-webkit-scrollbar { display: none; }
    .palette-item {
      flex: 0 0 120px;
      scroll-snap-align: start;
    }
    .palette-swatch { aspect-ratio: 1; }

    /* CATALOG MOBILE */
    .catalog-header {
      flex-direction: column; align-items: flex-start; gap: 20px; margin-bottom: 32px;
    }
    .catalog-header .btn { width: 100%; justify-content: center; }
    .catalog-filters-wrap {
      position: relative; margin-top: 24px;
    }
    .catalog-filters-wrap::after {
      content: '';
      position: absolute; top: 0; right: 0;
      width: 60px; height: 100%;
      background: linear-gradient(to right, transparent, #0E0C0A);
      pointer-events: none;
    }
    .catalog-filters {
      display: flex; flex-wrap: nowrap;
      overflow-x: auto; gap: 8px; margin-top: 0;
      padding-bottom: 8px;
    }
    .catalog-filters::-webkit-scrollbar { display: none; }
    .filter-btn {
      flex-shrink: 0;
      animation: nudge 1.5s ease-in-out 1;
    }

    /* STICKY WHY CARDS */
    .why-grid {
      display: flex; flex-direction: column;
      gap: 0; margin-top: 40px; border: none;
    }
    .why-item {
      position: sticky;
      top: 60px;
      border-radius: 8px;
      border: 1px solid rgba(255,255,255,0.08);
      margin-bottom: 12px;
      background: var(--graphite-80);
    }
    .why-item:nth-child(1) { top: 60px; z-index: 1; }
    .why-item:nth-child(2) { top: 72px; z-index: 2; }
    .why-item:nth-child(3) { top: 84px; z-index: 3; }
    .why-item:nth-child(4) { top: 96px; z-index: 4; }
    .why-item:nth-child(5) { top: 108px; z-index: 5; }
    .why-item:nth-child(6) { top: 120px; z-index: 6; }
    .why-item:nth-child(7) { top: 132px; z-index: 7; }

    /* CALCULATOR MOBILE */
    .calc-section { padding: 72px 6vw; }
    .calc-section-header { margin-bottom: 40px; }
    .calc-stepper { gap: 0; margin-bottom: 36px; }
    .csi-lbl { display: none; }
    .csi-line { margin: 0 8px; margin-bottom: 0; }
    .calc-type-row { grid-template-columns: 1fr 1fr; }
    .calc-type-btn { padding: 24px 16px; gap: 10px; }
    .ctb-icon svg { width: 36px; height: 36px; }
    .ctb-label { font-size: 13px; }
    .calc-p3-inner { grid-template-columns: 1fr; gap: 32px; }
    .calc-res-grid { grid-template-columns: 1fr 1fr; }
    .calc-cta-row { flex-direction: column; }
    .calc-cta-row .btn { width: 100%; justify-content: center; }
    .form-row { grid-template-columns: 1fr; }
  }

  @media (max-width: 480px) {
    .btn-nav-ghost { display: none; }
    .hero-tags { display: none; }
    .hero-actions .btn { font-size: 12px; padding: 14px 16px; }
    .hero-stats { gap: 16px; }
    .hero-stat-num { font-size: 20px; }
    .production-features { grid-template-columns: 1fr; }
    .prod-stat-num { font-size: 48px; }
    .calc-type-row { grid-template-columns: 1fr 1fr; gap: 2px; }
    .calc-inp { font-size: 22px; padding: 14px 16px; }
    .calc-res-item.big .crv { font-size: 26px; }
  }

  /* PRODUCTION SECTION */
  .production-section {
    background: var(--graphite);
    padding: 100px 8vw 0;
  }
  .production-inner {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 80px; align-items: center;
    padding-bottom: 64px;
  }
  .production-stats {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1px; background: rgba(255,255,255,0.07);
  }
  .prod-stat {
    background: var(--graphite);
    padding: 36px 32px;
    transition: background 0.25s;
  }
  .prod-stat:hover { background: var(--graphite-80); }
  .prod-stat-num {
    font-size: clamp(44px, 5.5vw, 76px);
    font-weight: 800; color: var(--white);
    letter-spacing: -0.04em; line-height: 1;
    font-variant-numeric: tabular-nums;
  }
  .prod-stat-unit {
    font-size: 12px; font-weight: 700; color: var(--terracotta);
    letter-spacing: 0.12em; text-transform: uppercase; margin-top: 6px;
  }
  .prod-stat-label {
    font-size: 11px; color: rgba(255,255,255,0.38);
    margin-top: 12px; letter-spacing: 0.06em; text-transform: uppercase; line-height: 1.5;
  }
  .production-features {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1px; background: rgba(255,255,255,0.07);
    border-top: 1px solid rgba(255,255,255,0.07);
  }
  .prod-feature {
    background: var(--graphite-80);
    padding: 24px 28px;
    display: flex; align-items: center; gap: 16px;
    transition: background 0.22s;
  }
  .prod-feature:hover { background: var(--graphite-60); }
  .prod-feature-icon {
    width: 42px; height: 42px; flex-shrink: 0;
    background: rgba(181,82,42,0.1);
    border: 1px solid rgba(181,82,42,0.22);
    border-radius: 2px;
    display: flex; align-items: center; justify-content: center;
  }
  .prod-feature-icon svg { width: 18px; height: 18px; stroke: var(--terracotta-light); fill: none; stroke-width: 1.5; }
  .prod-feature-title { font-size: 13px; font-weight: 700; color: var(--white); line-height: 1.3; }
  .prod-feature-sub { font-size: 11px; color: rgba(255,255,255,0.38); margin-top: 3px; letter-spacing: 0.03em; }

  @media (max-width: 900px) {
    .production-section { padding: 72px 6vw 0; }
    .production-inner { grid-template-columns: 1fr; gap: 40px; padding-bottom: 48px; }
    .prod-stat { padding: 28px 24px; }
    .production-features { grid-template-columns: 1fr 1fr; }
    .prod-feature { padding: 20px; }
    .hero-title {
      text-align: center;
    }
    .hero-subtitle {
      text-align: center;
    }
  }
  .calc-title {
    color: var(--white);
  }