/* ============================================
   СТУПЕНЬКА — Styles
   Aesthetic: Refined modern / architectural minimal
   ============================================ */

:root {
  --c-bg: #F7F4F0;
  --c-bg-alt: #EFEBE5;
  --c-surface: #FFFFFF;
  --c-dark: #1A1614;
  --c-dark-soft: #2D2522;
  --c-text: #3D3330;
  --c-text-muted: #8A7E76;
  --c-accent: #B8860B;
  --c-accent-hover: #D4A017;
  --c-accent-subtle: rgba(184,134,11,0.08);
  --c-wood: #5C3D2E;
  --c-wood-light: #A07855;
  --c-border: rgba(26,22,20,0.07);
  --c-border-accent: rgba(184,134,11,0.25);
  --f-display: 'DM Serif Display', serif;
  --f-body: 'Outfit', sans-serif;
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 28px;
  --shadow-card: 0 1px 3px rgba(26,22,20,0.04), 0 8px 24px rgba(26,22,20,0.06);
  --shadow-hover: 0 4px 12px rgba(26,22,20,0.06), 0 20px 48px rgba(26,22,20,0.1);
  --shadow-glow: 0 0 0 1px var(--c-border-accent), 0 8px 32px rgba(184,134,11,0.1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1200px;
  --gap: clamp(1rem, 3vw, 2rem);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--f-body);
  font-weight: 400;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--f-body); cursor: pointer; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gap); }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 400; color: var(--c-dark); line-height: 1.15; }

/* ===== NAV ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 0;
  transition: all 0.5s var(--ease-out);
}
.nav.scrolled {
  background: rgba(247,244,240,0.92);
  backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  padding: 0.8rem 0;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--container); margin: 0 auto; padding: 0 var(--gap);
}
.nav-logo {
  font-family: var(--f-display); font-size: 1.5rem;
  color: var(--c-dark); letter-spacing: -0.02em; transition: opacity 0.3s;
}
.nav-logo:hover { opacity: 0.7; }
.nav-links { display: flex; align-items: center; gap: 2.2rem; list-style: none; }
.nav-links a {
  font-size: 0.85rem; font-weight: 500; color: var(--c-text-muted);
  letter-spacing: 0.01em; transition: color 0.3s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1.5px; background: var(--c-accent);
  transition: width 0.3s var(--ease-out);
}
.nav-links a:hover { color: var(--c-dark); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  font-size: 0.85rem; font-weight: 600; color: var(--c-dark) !important;
  background: var(--c-accent-subtle); padding: 0.55rem 1.3rem;
  border-radius: 100px; border: 1px solid var(--c-border-accent);
  transition: all 0.3s var(--ease-out);
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--c-accent); color: #fff !important; border-color: var(--c-accent); }

.hamburger {
  display: none; width: 32px; height: 24px;
  position: relative; cursor: pointer; z-index: 101;
}
.hamburger span {
  position: absolute; left: 0; width: 100%; height: 2px;
  background: var(--c-dark); border-radius: 1px; transition: all 0.35s var(--ease-out);
}
.hamburger span:nth-child(1) { top: 2px; }
.hamburger span:nth-child(2) { top: 11px; }
.hamburger span:nth-child(3) { top: 20px; }
.hamburger.active span:nth-child(1) { top: 11px; transform: rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { top: 11px; transform: rotate(-45deg); }

.mobile-overlay {
  position: fixed; inset: 0;
  background: rgba(247,244,240,0.97); backdrop-filter: blur(30px);
  z-index: 99; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 1.8rem;
  opacity: 0; pointer-events: none; transition: opacity 0.4s var(--ease-out);
}
.mobile-overlay.active { opacity: 1; pointer-events: all; }
.mobile-overlay a { font-family: var(--f-display); font-size: 1.8rem; color: var(--c-dark); transition: color 0.2s; }
.mobile-overlay a:hover { color: var(--c-accent); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  position: relative; overflow: hidden; background: var(--c-dark);
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(92,61,46,0.4) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(184,134,11,0.12) 0%, transparent 60%),
    linear-gradient(160deg, #1A1614 0%, #2D2522 40%, #1A1614 100%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0; opacity: 0.3;
  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)' opacity='0.4'/%3E%3C/svg%3E");
  background-size: 128px; pointer-events: none;
}
.hero-accent {
  position: absolute; right: 8%; top: 15%; bottom: 15%;
  width: 1px; background: linear-gradient(to bottom, transparent, var(--c-accent) 30%, var(--c-accent) 70%, transparent);
  opacity: 0.2;
}
.hero-accent::before {
  content: ''; position: absolute; top: 30%; left: -20px;
  width: 41px; height: 1px; background: var(--c-accent); opacity: 0.4;
}
.hero-content {
  position: relative; z-index: 2;
  max-width: var(--container); margin: 0 auto;
  padding: 8rem var(--gap) 4rem; width: 100%;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--c-accent);
  margin-bottom: 2rem; opacity: 0; animation: fadeUp 0.7s var(--ease-out) 0.1s forwards;
}
.hero-tag::before { content: ''; width: 32px; height: 1px; background: var(--c-accent); }
.hero h1 {
  font-size: clamp(3rem, 7vw, 5.5rem); color: #fff;
  letter-spacing: -0.03em; line-height: 1.05; max-width: 700px;
  margin-bottom: 1.8rem; opacity: 0; animation: fadeUp 0.8s var(--ease-out) 0.25s forwards;
}
.hero h1 em { font-style: italic; color: var(--c-accent); }
.hero-sub {
  font-size: 1.1rem; color: rgba(255,255,255,0.5);
  max-width: 480px; line-height: 1.7; margin-bottom: 3rem; font-weight: 300;
  opacity: 0; animation: fadeUp 0.8s var(--ease-out) 0.4s forwards;
}
.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  opacity: 0; animation: fadeUp 0.8s var(--ease-out) 0.55s forwards;
}
.hero-metrics {
  display: flex; gap: 3.5rem; margin-top: 5rem;
  opacity: 0; animation: fadeUp 0.8s var(--ease-out) 0.7s forwards;
}
.metric-val { font-family: var(--f-display); font-size: 2.2rem; color: #fff; letter-spacing: -0.02em; }
.metric-label { font-size: 0.78rem; color: rgba(255,255,255,0.35); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 0.2rem; }

.scroll-hint {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
  opacity: 0; animation: fadeUp 0.8s var(--ease-out) 1s forwards;
}
.scroll-hint span { font-size: 0.7rem; color: rgba(255,255,255,0.25); letter-spacing: 0.15em; text-transform: uppercase; }
.scroll-line { width: 1px; height: 48px; background: rgba(255,255,255,0.15); position: relative; overflow: hidden; }
.scroll-line::after {
  content: ''; position: absolute; top: -100%; left: 0;
  width: 100%; height: 40%; background: var(--c-accent);
  animation: scrollLine 2s ease-in-out infinite;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.95rem 2rem; font-size: 0.88rem; font-weight: 600;
  letter-spacing: 0.02em; border-radius: var(--r-sm);
  border: none; transition: all 0.35s var(--ease-out);
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: var(--c-accent-hover); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(184,134,11,0.25); }
.btn-ghost { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.7); border: 1px solid rgba(255,255,255,0.12); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.25); }
.btn-dark { background: var(--c-dark); color: #fff; }
.btn-dark:hover { background: var(--c-dark-soft); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-arrow::after { content: '→'; transition: transform 0.3s var(--ease-out); }
.btn-arrow:hover::after { transform: translateX(4px); }

/* ===== SECTIONS ===== */
.section { padding: clamp(4rem, 8vw, 8rem) 0; }
.section-head { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-tag {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--c-accent); margin-bottom: 1rem;
}
.section-tag::before { content: ''; width: 24px; height: 1px; background: var(--c-accent); }
.section-title { font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -0.02em; }
.section-desc { font-size: 1.05rem; color: var(--c-text-muted); max-width: 520px; margin-top: 1rem; font-weight: 300; }
.section-head-center { text-align: center; }
.section-head-center .section-tag { justify-content: center; }
.section-head-center .section-desc { margin-left: auto; margin-right: auto; }

/* ===== ADVANTAGES ===== */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.adv-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 2.2rem;
  transition: all 0.4s var(--ease-out); position: relative; overflow: hidden;
}
.adv-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: linear-gradient(90deg, var(--c-accent), var(--c-wood-light));
  opacity: 0; transition: opacity 0.4s;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.adv-card:hover::after { opacity: 1; }
.adv-icon {
  width: 48px; height: 48px; border-radius: var(--r-md);
  background: var(--c-accent-subtle); display: flex;
  align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 1.5rem;
}
.adv-card h3 { font-size: 1.1rem; margin-bottom: 0.6rem; }
.adv-card p { font-size: 0.9rem; color: var(--c-text-muted); line-height: 1.65; }

/* ===== TYPES ===== */
.types-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.type-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-xl); overflow: hidden; transition: all 0.4s var(--ease-out);
}
.type-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: transparent; }
.type-visual { height: 260px; position: relative; overflow: hidden; }
.type-visual-marsh { background: linear-gradient(150deg, #2D2522 0%, #3D3330 40%, #5C3D2E 100%); }
.type-visual-bolz { background: linear-gradient(150deg, #3D3330 0%, #2D2522 40%, #5C3D2E 100%); }
.type-visual svg { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); }
.type-label {
  position: absolute; top: 1.2rem; left: 1.2rem;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--c-accent);
  background: rgba(184,134,11,0.12); border: 1px solid rgba(184,134,11,0.2);
  padding: 0.35rem 0.9rem; border-radius: 100px;
}
.type-body { padding: 2rem 2.2rem 2.2rem; }
.type-body h3 { font-size: 1.35rem; margin-bottom: 0.7rem; }
.type-body p { font-size: 0.92rem; color: var(--c-text-muted); line-height: 1.7; margin-bottom: 1.3rem; }
.type-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.type-tags span { font-size: 0.78rem; font-weight: 500; padding: 0.3rem 0.8rem; background: var(--c-bg); border-radius: 100px; color: var(--c-wood); }

/* ===== CALCULATOR ===== */
.calc-section { background: var(--c-bg-alt); }
.calc-wrap {
  max-width: 860px; margin: 0 auto;
  background: var(--c-surface); border-radius: var(--r-xl);
  border: 1px solid var(--c-border); overflow: hidden; box-shadow: var(--shadow-card);
}
.calc-top {
  background: var(--c-dark); padding: 2rem 2.5rem;
  display: flex; align-items: center; justify-content: space-between;
}
.calc-top h3 { color: #fff; font-size: 1.3rem; }
.calc-top-tag {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--c-accent);
  background: rgba(184,134,11,0.12); padding: 0.4rem 1rem; border-radius: 100px;
}
.calc-body { padding: 2.5rem; }
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.calc-field { display: flex; flex-direction: column; gap: 0.4rem; }
.calc-field.full { grid-column: 1 / -1; }
.calc-field label { font-size: 0.82rem; font-weight: 500; color: var(--c-text-muted); }
.calc-field label strong { color: var(--c-dark); font-weight: 600; }
.calc-field select, .calc-field input[type="text"], .calc-field input[type="number"] {
  padding: 0.85rem 1rem; border: 1px solid var(--c-border);
  border-radius: var(--r-sm); font-family: var(--f-body); font-size: 0.92rem;
  background: var(--c-bg); color: var(--c-text); outline: none;
  transition: border-color 0.3s, box-shadow 0.3s; -webkit-appearance: none;
}
.calc-field select:focus, .calc-field input:focus { border-color: var(--c-accent); box-shadow: var(--shadow-glow); }
.range-wrap { margin-top: 0.3rem; }
.range-wrap input[type="range"] {
  -webkit-appearance: none; width: 100%; height: 4px;
  border-radius: 2px; background: var(--c-border); outline: none;
}
.range-wrap input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: var(--c-accent); cursor: pointer; box-shadow: 0 2px 8px rgba(184,134,11,0.25);
  transition: transform 0.2s;
}
.range-wrap input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-hints { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--c-text-muted); margin-top: 0.3rem; }
.calc-checks { margin-top: 1.2rem; display: flex; flex-direction: column; gap: 0.8rem; }
.check-row { display: flex; align-items: center; gap: 0.7rem; cursor: pointer; }
.check-row input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--c-accent); cursor: pointer; }
.check-row span { font-size: 0.92rem; color: var(--c-text); }
.calc-result {
  margin-top: 2rem; background: var(--c-dark);
  border-radius: var(--r-md); padding: 2rem; text-align: center;
}
.calc-result-label { font-size: 0.78rem; color: rgba(255,255,255,0.4); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 0.4rem; }
.calc-result-price { font-family: var(--f-display); font-size: 2.8rem; color: var(--c-accent); letter-spacing: -0.02em; }
.calc-result-note { font-size: 0.78rem; color: rgba(255,255,255,0.25); margin-top: 0.3rem; }
.calc-submit { width: 100%; margin-top: 1.5rem; }

/* ===== GALLERY ===== */
.gallery-grid {
  display: grid; grid-template-columns: repeat(12, 1fr);
  grid-template-rows: 280px 280px; gap: 1.2rem;
}
.gallery-item { border-radius: var(--r-lg); overflow: hidden; position: relative; cursor: pointer; }
.gallery-item:nth-child(1) { grid-column: 1 / 6; grid-row: 1 / 3; }
.gallery-item:nth-child(2) { grid-column: 6 / 9; }
.gallery-item:nth-child(3) { grid-column: 9 / 13; }
.gallery-item:nth-child(4) { grid-column: 6 / 10; }
.gallery-item:nth-child(5) { grid-column: 10 / 13; }
.gallery-bg { width: 100%; height: 100%; transition: transform 0.7s var(--ease-out); }
.gallery-item:hover .gallery-bg { transform: scale(1.06); }
.g1 { background: linear-gradient(160deg, #3D3330 0%, #5C3D2E 60%, #A07855 100%); }
.g2 { background: linear-gradient(140deg, #5C3D2E 0%, #3D3330 100%); }
.g3 { background: linear-gradient(160deg, #2D2522 0%, #5C3D2E 100%); }
.g4 { background: linear-gradient(140deg, #A07855 0%, #5C3D2E 100%); }
.g5 { background: linear-gradient(160deg, #3D3330 0%, #2D2522 100%); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(26,22,20,0.75) 0%, transparent 50%);
  display: flex; align-items: flex-end; padding: 1.5rem;
  opacity: 0; transition: opacity 0.35s;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span { color: #fff; font-size: 0.88rem; font-weight: 500; }

/* ===== STEPS / PROCESS ===== */
.steps-section { background: var(--c-bg-alt); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; counter-reset: step; }
.step-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 2.2rem 2rem;
  position: relative; counter-increment: step;
  transition: all 0.4s var(--ease-out);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.step-num { font-family: var(--f-display); font-size: 3rem; color: var(--c-accent-subtle); line-height: 1; margin-bottom: 1.2rem; letter-spacing: -0.03em; }
.step-num::before { content: counter(step, decimal-leading-zero); }
.step-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.step-card p { font-size: 0.9rem; color: var(--c-text-muted); line-height: 1.65; }
.step-card:not(:last-child)::after {
  content: ''; position: absolute; top: 2.8rem; right: -0.75rem;
  width: 1.5rem; height: 1px; background: var(--c-border);
}

/* ===== CONTACT ===== */
.contact-section { background: var(--c-dark); position: relative; overflow: hidden; }
.contact-section::before {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(184,134,11,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 4rem; align-items: start; }
.contact-info .section-tag { color: var(--c-accent); }
.contact-info .section-tag::before { background: var(--c-accent); }
.contact-info .section-title { color: #fff; }
.contact-info .section-desc { color: rgba(255,255,255,0.45); }
.contact-details { margin-top: 2.5rem; display: flex; flex-direction: column; gap: 1.2rem; }
.contact-row { display: flex; align-items: center; gap: 1rem; }
.contact-row-icon {
  width: 44px; height: 44px; border-radius: var(--r-md);
  background: rgba(184,134,11,0.1); display: flex;
  align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0;
}
.contact-row-text { font-size: 0.92rem; color: rgba(255,255,255,0.6); }
.contact-row-text strong { display: block; color: #fff; font-weight: 500; margin-bottom: 0.1rem; }
.contact-form {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--r-xl); padding: 2.5rem; backdrop-filter: blur(12px);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 500; color: rgba(255,255,255,0.45); margin-bottom: 0.35rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 0.85rem 1rem;
  border: 1px solid rgba(255,255,255,0.08); border-radius: var(--r-sm);
  background: rgba(255,255,255,0.04); color: #fff;
  font-family: var(--f-body); font-size: 0.92rem; outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.2); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(184,134,11,0.12); }
.form-group select option { background: var(--c-dark); color: #fff; }
.form-group textarea { resize: vertical; min-height: 90px; }
.form-submit {
  width: 100%; padding: 1rem; background: var(--c-accent); color: #fff;
  border: none; border-radius: var(--r-sm); font-family: var(--f-body);
  font-size: 0.92rem; font-weight: 600; letter-spacing: 0.02em;
  cursor: pointer; transition: all 0.3s var(--ease-out);
}
.form-submit:hover { background: var(--c-accent-hover); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(184,134,11,0.2); }

/* ===== FOOTER ===== */
.footer { background: var(--c-dark); border-top: 1px solid rgba(255,255,255,0.05); padding: 2.5rem 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.footer-logo { font-family: var(--f-display); font-size: 1.2rem; color: #fff; }
.footer-copy { font-size: 0.82rem; color: rgba(255,255,255,0.3); }
.footer-copy a { color: rgba(255,255,255,0.5); transition: color 0.2s; }
.footer-copy a:hover { color: var(--c-accent); }

/* ===== REVEAL ANIMATIONS ===== */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.vis { opacity: 1; transform: translateY(0); }
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 0.24s; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 0.32s; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scrollLine { 0% { top: -40%; } 100% { top: 100%; } }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .step-card:nth-child(2)::after, .step-card:nth-child(4)::after { display: none; }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: block; }
  .hero-metrics { gap: 2rem; }
  .types-grid { grid-template-columns: 1fr; max-width: 520px; }
  .calc-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 0.8rem; text-align: center; }
  .gallery-grid { grid-template-columns: 1fr 1fr; grid-template-rows: repeat(3, 200px); }
  .gallery-item:nth-child(1) { grid-column: 1 / 3; grid-row: 1 / 2; }
  .gallery-item:nth-child(2) { grid-column: 1 / 2; }
  .gallery-item:nth-child(3) { grid-column: 2 / 3; }
  .gallery-item:nth-child(4) { grid-column: 1 / 2; }
  .gallery-item:nth-child(5) { grid-column: 2 / 3; }
}
@media (max-width: 600px) {
  .adv-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .step-card::after { display: none !important; }
  .hero-metrics { flex-direction: column; gap: 1rem; }
  .calc-top { flex-direction: column; gap: 0.8rem; align-items: flex-start; }
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: repeat(5, 180px); }
  .gallery-item:nth-child(1) { grid-column: 1; grid-row: auto; }
}