/* 3DIV — студия 3D-печати. Светлая тема. Без внешних зависимостей. */

:root{
  --bg: #ffffff;
  --bg-2: #f5f8fb;
  --card: #ffffff;
  --card-2: #fbfdff;
  --line: #e4eaf1;
  --line-2: #d2dde8;
  --text: #101923;
  --muted: #5d6e80;
  --accent: #0a7f57;
  --accent-2: #1a6cba;
  --radius: 18px;
  --wrap: 1140px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow-sm: 0 2px 8px -4px rgba(16,25,35,.14);
  --shadow-md: 0 18px 40px -26px rgba(16,25,35,.35);
  --shadow-lg: 0 30px 70px -40px rgba(16,25,35,.45);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; -webkit-text-size-adjust: 100%; color-scheme: light; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; }

.wrap{ width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.accent{
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ── Прогресс прокрутки ─────────────────────────────────── */
.progress{
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 50; transition: width .1s linear;
}

/* ── Шапка ──────────────────────────────────────────────── */
.topbar{
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,.82);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
}
.topbar.is-stuck{ border-bottom-color: var(--line); background: rgba(255,255,255,.95); box-shadow: var(--shadow-sm); }
.topbar-inner{ display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 66px; }

.logo{ display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.02em; font-size: 18px; color: var(--text); }
.logo-mark{
  width: 20px; height: 20px; border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px -6px rgba(9,122,83,.7);
  animation: markPulse 4s var(--ease) infinite;
}
@keyframes markPulse{ 0%,100%{ transform: rotate(0) scale(1); } 50%{ transform: rotate(12deg) scale(1.08); } }
.logo .dot{ color: var(--accent); }
.logo-domain{ color: var(--muted); font-weight: 500; }

.nav{ display: flex; align-items: center; gap: 24px; font-size: 15px; color: var(--muted); }
.nav a{ position: relative; transition: color .2s; }
.nav a:hover{ color: var(--text); }
.nav a:not(.btn)::after{
  content: ""; position: absolute; left: 0; bottom: -6px; height: 1px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .25s var(--ease);
}
.nav a:not(.btn):hover::after{ width: 100%; }

.burger{ display: none; width: 40px; height: 40px; border: 1px solid var(--line-2); background: #fff; border-radius: 10px; padding: 10px; cursor: pointer; }
.burger span{ display: block; height: 1.5px; background: var(--text); margin: 4px 0; transition: transform .25s, opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1){ transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3){ transform: translateY(-5.5px) rotate(-45deg); }

/* ── Кнопки ─────────────────────────────────────────────── */
.btn{
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px; border-radius: 13px;
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #ffffff; font-weight: 650; font-size: 15px; border: 1px solid transparent;
  box-shadow: 0 12px 26px -14px rgba(9,122,83,.65);
  transition: transform .18s var(--ease), box-shadow .25s, filter .2s;
  cursor: pointer;
}
.btn::after{
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255,255,255,.45) 50%, transparent 80%);
  transform: translateX(-120%); transition: transform .7s var(--ease);
}
.btn:hover{ transform: translateY(-2px); box-shadow: 0 18px 34px -16px rgba(9,122,83,.7); }
.btn:hover::after{ transform: translateX(120%); }
.btn:active{ transform: translateY(0); }
.btn-ghost{ background: #ffffff; color: var(--text); border-color: var(--line-2); box-shadow: var(--shadow-sm); }
.btn-ghost::after{ display: none; }
.btn-ghost:hover{ background: #f7fafd; border-color: #bccbda; }
.btn-sm{ padding: 9px 16px; border-radius: 10px; font-size: 14px; }
.btn-block{ width: 100%; }

/* ── HERO ───────────────────────────────────────────────── */
.hero{ position: relative; padding: 84px 0 56px; overflow: hidden;
  background: radial-gradient(120% 90% at 50% -20%, #f2f8ff 0%, #ffffff 60%); }
.orb{ position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; pointer-events: none; }
.orb-1{ width: 460px; height: 460px; left: -140px; top: -140px; background: radial-gradient(circle, rgba(9,122,83,.20), transparent 65%); animation: float1 16s ease-in-out infinite; }
.orb-2{ width: 520px; height: 520px; right: -180px; top: 20px; background: radial-gradient(circle, rgba(26,108,186,.16), transparent 65%); animation: float2 20s ease-in-out infinite; }
@keyframes float1{ 0%,100%{ transform: translate(0,0); } 50%{ transform: translate(40px,30px); } }
@keyframes float2{ 0%,100%{ transform: translate(0,0); } 50%{ transform: translate(-50px,20px); } }

.hero-inner{ position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow{
  display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px;
  font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent);
}
.pulse{ width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(9,122,83,.55); animation: pulse 2.2s infinite; }
@keyframes pulse{ 70%{ box-shadow: 0 0 0 12px rgba(9,122,83,0); } 100%{ box-shadow: 0 0 0 0 rgba(9,122,83,0); } }

h1{ margin: 0 0 20px; font-size: clamp(34px, 5.2vw, 60px); line-height: 1.04; letter-spacing: -.035em; font-weight: 780; }
.lead{ margin: 0 0 30px; max-width: 48ch; color: var(--muted); font-size: 17.5px; }
.cta-row{ display: flex; gap: 12px; flex-wrap: wrap; }

.stats{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 38px; }
.stat{ padding: 14px 14px 12px; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: var(--shadow-sm); }
.stat b{ display: block; font-size: 24px; letter-spacing: -.02em; line-height: 1.1; }
.stat b span{ font-size: 13px; color: var(--muted); margin-left: 2px; }
.stat span{ font-size: 12.5px; color: var(--muted); }

/* анимированный «принтер» */
.hero-art{ position: relative; }
.printer{ width: 100%; height: auto; filter: drop-shadow(0 26px 50px rgba(26,108,186,.14)); }
.spin{ transform-origin: 210px 210px; animation: spin 60s linear infinite; }
@keyframes spin{ to{ transform: rotate(360deg); } }
.gantry{ animation: gantry 6s var(--ease) infinite; }
@keyframes gantry{ 0%,100%{ transform: translateX(-38px); } 50%{ transform: translateX(38px); } }
.layer{ opacity: 0; animation: layerUp 6s var(--ease) infinite; }
.layer.l1{ animation-delay: .1s } .layer.l2{ animation-delay: .5s } .layer.l3{ animation-delay: .9s }
.layer.l4{ animation-delay: 1.3s } .layer.l5{ animation-delay: 1.7s } .layer.l6{ animation-delay: 2.1s } .layer.l7{ animation-delay: 2.5s }
@keyframes layerUp{ 0%{ opacity: 0; transform: translateY(6px); } 12%{ opacity: .95; transform: translateY(0); } 78%{ opacity: .95; } 100%{ opacity: 0; } }
.spark{ animation: spark 1.4s ease-in-out infinite; }
@keyframes spark{ 0%,100%{ opacity: .3; } 50%{ opacity: 1; } }

/* ── Бегущая строка ─────────────────────────────────────── */
.marquee{ border-block: 1px solid var(--line); background: var(--bg-2); overflow: hidden; }
.marquee-track{
  display: flex; align-items: center; gap: 28px; white-space: nowrap;
  padding: 13px 0; animation: marquee 34s linear infinite;
  font-size: 13.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.marquee-track i{ color: var(--accent); opacity: .7; font-style: normal; }
@keyframes marquee{ to{ transform: translateX(-50%); } }

/* ── Секции ─────────────────────────────────────────────── */
.section{ padding: 84px 0; }
.section-alt{ background: var(--bg-2); border-block: 1px solid var(--line); }
.section-head{ margin-bottom: 40px; }
h2{ margin: 0 0 12px; font-size: clamp(25px, 3.4vw, 38px); letter-spacing: -.025em; font-weight: 740; }
.section-sub{ margin: 0; color: var(--muted); max-width: 62ch; font-size: 16.5px; }
h3{ margin: 0 0 8px; font-size: 19.5px; letter-spacing: -.01em; }

.reveal{ opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in{ opacity: 1; transform: none; }

/* ── Карточки услуг ─────────────────────────────────────── */
.cards{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card{
  position: relative; padding: 26px 24px 22px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.card::before{
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  background: radial-gradient(340px 180px at 20% 0%, rgba(9,122,83,.09), transparent 70%);
  opacity: 0; transition: opacity .35s;
}
.card:hover{ transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow-lg); }
.card:hover::before{ opacity: 1; }
.card-accent{ border-color: rgba(9,122,83,.35); box-shadow: 0 0 0 1px rgba(9,122,83,.07) inset, var(--shadow-md); }
.card-top{ display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.card-tag{ font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.card-ico{ color: var(--accent-2); opacity: .9; }
.card-ico svg{ width: 26px; height: 26px; display: block; }
.card p{ margin: 0 0 18px; color: var(--muted); font-size: 15px; }
.spec{ list-style: none; padding: 0; margin: 0 0 18px; border-top: 1px solid var(--line); }
.spec li{ display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; font-size: 13.5px; border-bottom: 1px dashed var(--line); }
.spec li span{ color: var(--muted); }
.spec li b{ font-weight: 600; text-align: right; }
.card-link{ margin-top: auto; font-size: 14.5px; color: var(--accent); display: inline-flex; gap: 6px; align-items: center; font-weight: 550; }
.card-link span{ transition: transform .25s var(--ease); }
.card-link:hover span{ transform: translateX(4px); }

/* ── Оборудование ───────────────────────────────────────── */
.printers{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.printer-card{
  position: relative; padding: 22px 20px 20px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
  display: flex; flex-direction: column;
}
.printer-card::after{
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease);
}
.printer-card:hover{ transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow-lg); }
.printer-card:hover::after{ transform: scaleX(1); }
.printer-card header{ display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.printer-badge{
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(9,122,83,.3); background: rgba(9,122,83,.07);
}
.printer-dot{
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 rgba(9,122,83,.5); animation: pulse 2.6s infinite;
}
.printer-card h3{ font-size: 17.5px; margin-bottom: 8px; }
.printer-card p{ margin: 0 0 16px; font-size: 14px; color: var(--muted); }
.printer-spec{ list-style: none; padding: 0; margin: auto 0 0; border-top: 1px solid var(--line); }
.printer-spec li{
  display: flex; justify-content: space-between; gap: 10px;
  padding: 8px 0; font-size: 13px; border-bottom: 1px dashed var(--line);
}
.printer-spec li:last-child{ border-bottom: 0; }
.printer-spec span{ color: var(--muted); }
.printer-spec b{ font-weight: 600; text-align: right; }
.printers-note{
  margin: 22px 0 0; font-size: 14px; color: var(--muted);
  padding-left: 14px; border-left: 2px solid rgba(9,122,83,.4);
}

/* ── Калькулятор ────────────────────────────────────────── */
.calc{ display: grid; grid-template-columns: 1.25fr .75fr; gap: 22px; align-items: start; }
.calc-controls, .calc-result{
  padding: 26px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.calc-controls{ display: grid; gap: 20px; }
.calc-result{
  display: grid; gap: 18px; align-content: start;
  background: linear-gradient(180deg, rgba(9,122,83,.06), #ffffff 60%);
  border-color: rgba(9,122,83,.28);
}
.field{ display: grid; gap: 8px; font-size: 14px; color: var(--muted); }
.field > span{ display: flex; justify-content: space-between; gap: 10px; }
.field output{ color: var(--text); font-variant-numeric: tabular-nums; }
.field input[type="text"], .field input[type="number"], .field select, .field textarea{
  width: 100%; padding: 12px 14px; border-radius: 11px;
  background: #fbfdff; color: var(--text);
  border: 1px solid var(--line); font: inherit; font-size: 15px;
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline: none; border-color: rgba(9,122,83,.6); background: #fff;
  box-shadow: 0 0 0 4px rgba(9,122,83,.10);
}
.field textarea{ resize: vertical; min-height: 84px; }

input[type="range"]{
  -webkit-appearance: none; appearance: none; width: 100%; height: 26px; background: transparent; cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track{
  height: 6px; border-radius: 99px;
  background: linear-gradient(90deg, var(--accent) var(--fill, 10%), #e3eaf2 var(--fill, 10%));
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance: none; width: 20px; height: 20px; margin-top: -7px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent); box-shadow: 0 2px 10px rgba(9,122,83,.35);
}
input[type="range"]::-moz-range-track{ height: 6px; border-radius: 99px; background: #e3eaf2; }
input[type="range"]::-moz-range-progress{ height: 6px; border-radius: 99px; background: var(--accent); }
input[type="range"]::-moz-range-thumb{ width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); }

.calc-note{ font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.calc-price{ display: grid; gap: 4px; }
.calc-label{ font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.calc-price b{ font-size: clamp(30px, 4vw, 40px); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.calc-meta{ display: grid; gap: 8px; padding: 14px 0; border-block: 1px solid var(--line); }
.calc-meta div{ display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); }
.calc-meta b{ color: var(--text); font-weight: 600; }

/* ── Галерея ────────────────────────────────────────────── */
.gallery{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tile{
  margin: 0; border-radius: 15px; overflow: hidden; cursor: zoom-in;
  border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), border-color .3s, box-shadow .35s;
}
.tile img{ aspect-ratio: 4 / 3; width: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.tile:hover{ transform: translateY(-4px); border-color: var(--line-2); box-shadow: var(--shadow-lg); }
.tile:hover img{ transform: scale(1.05); }
.tile figcaption{ display: grid; gap: 2px; padding: 13px 15px 15px; }
.tile figcaption b{ font-size: 14.5px; font-weight: 650; }
.tile figcaption em{ font-style: normal; font-size: 12.5px; color: var(--muted); }

/* ── Шаги ───────────────────────────────────────────────── */
.steps{ list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.steps li{
  position: relative; padding: 24px 22px; border-radius: 15px;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.steps li:hover{ transform: translateY(-3px); border-color: var(--line-2); box-shadow: var(--shadow-md); }
.steps li::after{
  content: ""; position: absolute; top: 46px; right: -9px; width: 10px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.steps li:last-child::after{ display: none; }
.step-num{ display: block; margin-bottom: 12px; font-size: 12.5px; letter-spacing: .14em; color: var(--accent-2); }
.steps p{ margin: 0; color: var(--muted); font-size: 14.5px; }

/* ── Материалы ──────────────────────────────────────────── */
.chips{ display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.chip{
  font-size: 13px; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--line-2); color: #34465a; background: #fff;
  transition: border-color .2s, color .2s, transform .2s, box-shadow .2s;
}
.chip:hover{ border-color: rgba(9,122,83,.55); color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.table-wrap{ border: 1px solid var(--line); border-radius: 15px; overflow: auto; background: #fff; box-shadow: var(--shadow-sm); }
table{ width: 100%; border-collapse: collapse; font-size: 15px; }
th, td{ padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--line); }
th{ font-size: 12px; letter-spacing: .07em; text-transform: uppercase; color: var(--muted); font-weight: 650; background: #fafcfe; }
tbody tr:last-child td{ border-bottom: 0; }
tbody tr{ transition: background .2s; }
tbody tr:hover{ background: #f7fafd; }

/* ── FAQ ────────────────────────────────────────────────── */
.faq{ display: grid; gap: 10px; max-width: 860px; }
details{
  border: 1px solid var(--line); border-radius: 14px; background: #fff;
  padding: 0 20px; box-shadow: var(--shadow-sm);
  transition: border-color .25s, background .25s, box-shadow .25s;
}
details[open]{ border-color: rgba(9,122,83,.35); background: #fbfefd; box-shadow: var(--shadow-md); }
summary{
  cursor: pointer; list-style: none; padding: 17px 0; font-weight: 650; font-size: 15.5px;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
summary::-webkit-details-marker{ display: none; }
summary::after{ content: "+"; color: var(--accent); font-size: 20px; line-height: 1; transition: transform .25s; }
details[open] summary::after{ transform: rotate(45deg); }
details p{ margin: 0 0 18px; color: var(--muted); font-size: 15px; }

/* ── Контакты и форма ───────────────────────────────────── */
.cta-section{
  border-top: 1px solid var(--line);
  background:
    radial-gradient(60% 120% at 12% 0%, rgba(9,122,83,.08), transparent 60%),
    radial-gradient(60% 120% at 88% 100%, rgba(26,108,186,.08), transparent 60%),
    var(--bg-2);
}
.cta-inner{ display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.contact-links{ display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.form{ display: grid; gap: 14px; padding: 26px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-md); }
.form-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-hint{ margin: 0; font-size: 12.5px; color: var(--muted); text-align: center; }

/* ── Подвал ─────────────────────────────────────────────── */
.footer{ border-top: 1px solid var(--line); padding: 28px 0; background: #fff; }
.footer-inner{ display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.footer-dot{ opacity: .5; }
.footer a:hover{ color: var(--accent); }

/* ── Лайтбокс ───────────────────────────────────────────── */
.lightbox{
  position: fixed; inset: 0; z-index: 60; display: none; place-items: center;
  background: rgba(12,18,26,.86); backdrop-filter: blur(8px); padding: 24px;
}
.lightbox.on{ display: grid; }
.lightbox figure{ margin: 0; max-width: 980px; width: 100%; }
.lightbox img{ width: 100%; border-radius: 16px; border: 1px solid rgba(255,255,255,.18); background: #fff; }
.lightbox figcaption{ display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; margin-top: 14px; color: #eef4fa; }
.lightbox figcaption b{ font-size: 17px; }
.lightbox figcaption em{ font-style: normal; color: rgba(238,244,250,.7); font-size: 14px; }
.lb-close{
  position: absolute; top: 22px; right: 24px; width: 42px; height: 42px;
  border-radius: 12px; border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.1);
  color: #fff; cursor: pointer; font-size: 16px; transition: border-color .2s, transform .2s, background .2s;
}
.lb-close:hover{ border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.2); transform: rotate(90deg); }

/* ── Адаптив ────────────────────────────────────────────── */
@media (max-width: 1100px){
  .printers{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 980px){
  .hero-inner, .calc, .cta-inner{ grid-template-columns: 1fr; }
  .hero-art{ max-width: 340px; order: -1; margin: 0 auto; }
  .cards, .gallery, .steps{ grid-template-columns: 1fr 1fr; }
  .stats{ grid-template-columns: repeat(2, 1fr); }
  .steps li::after{ display: none; }
}
@media (max-width: 720px){
  .nav{
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 12px 24px 20px; background: #fff;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md); display: none;
  }
  .nav.open{ display: flex; }
  .nav a:not(.btn){ padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav .btn{ margin-top: 10px; }
  .burger{ display: block; }
  .section{ padding: 60px 0; }
  .hero{ padding: 48px 0 32px; }
  .cards, .gallery, .steps, .form-row, .printers{ grid-template-columns: 1fr; }
  .form, .calc-controls, .calc-result{ padding: 20px; }
}
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html{ scroll-behavior: auto; }
}