/* Осьфорс — original industrial marketing styles */
:root {
  --bg: #0c1412;
  --bg-elev: #13201c;
  --bg-soft: #1a2b25;
  --ink: #eef3ee;
  --ink-dim: #a7b5ad;
  --line: rgba(238, 243, 238, 0.12);
  --accent: #d9922a;
  --accent-2: #3dbf8f;
  --danger: #e07060;
  --radius: 2px;
  --font-display: "Unbounded", system-ui, sans-serif;
  --font-body: "Mulish", system-ui, sans-serif;
  --max: 1120px;
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(217, 146, 42, 0.16), transparent 55%),
    radial-gradient(900px 500px at 95% 15%, rgba(61, 191, 143, 0.12), transparent 50%),
    linear-gradient(165deg, #0a100e 0%, #0c1412 40%, #101a17 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.04) 2px,
      rgba(0, 0, 0, 0.04) 3px
    );
}

a {
  color: var(--accent-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

img,
svg {
  max-width: 100%;
  display: block;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #111;
  padding: 0.75rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  backdrop-filter: blur(14px);
  background: rgba(12, 20, 18, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.brand-mark span {
  color: var(--accent);
}

.brand-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  display: none;
}

@media (min-width: 720px) {
  .brand-tag {
    display: inline;
  }
}

.nav {
  display: none;
  gap: 1.35rem;
  align-items: center;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -0.35rem;
  height: 2px;
  background: var(--accent);
  transition: right 0.35s var(--ease);
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  right: 0;
}

.nav a[aria-current="page"] {
  color: var(--accent);
}

.header-cta {
  display: none;
}

.burger {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.burger span::before,
.burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
}

.burger span::before {
  top: -6px;
}

.burger span::after {
  top: 6px;
}

@media (min-width: 900px) {
  .nav {
    display: flex;
  }

  .header-cta {
    display: inline-flex;
  }

  .burger {
    display: none;
  }
}

.nav-mobile {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: rgba(10, 16, 14, 0.97);
  padding: 1.5rem;
  flex-direction: column;
  gap: 1rem;
  z-index: 39;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
}

body.menu-open {
  overflow: hidden;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.35rem;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s, color 0.25s, border-color 0.25s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #1a1205;
}

.btn-primary:hover {
  background: #f0a83a;
  color: #1a1205;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.btn-dark {
  background: var(--bg-soft);
  color: var(--ink);
  border-color: var(--line);
}

/* Hero */
.hero {
  padding: 3.5rem 0 4rem;
  min-height: calc(100svh - var(--nav-h));
  display: grid;
  align-items: center;
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin: 0 0 1.25rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.lead {
  font-size: 1.12rem;
  color: var(--ink-dim);
  max-width: 38ch;
  margin: 0 0 1.75rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 520px;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.stat span {
  font-size: 0.8rem;
  color: var(--ink-dim);
}

/* CSS mixer visual */
.mixer-stage {
  position: relative;
  aspect-ratio: 1 / 1.05;
  max-width: 420px;
  margin-inline: auto;
  isolation: isolate;
}

.mixer-glow {
  position: absolute;
  inset: 12% 8%;
  background: radial-gradient(circle at 50% 40%, rgba(217, 146, 42, 0.28), transparent 65%);
  filter: blur(8px);
  z-index: 0;
  animation: pulse-glow 4.5s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%,
  100% {
    opacity: 0.7;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.mixer-svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
}

.paddle {
  transform-origin: 200px 210px;
  animation: spin-paddle 8s linear infinite;
}

@keyframes spin-paddle {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .paddle,
  .mixer-glow,
  .reveal {
    animation: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Sections */
.section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 0 0 0.85rem;
}

.section-head p {
  margin: 0;
  color: var(--ink-dim);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Catalog grid — not cards in hero; product rows with dividers */
.model-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.model {
  display: grid;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

@media (min-width: 800px) {
  .model {
    grid-template-columns: 140px 1fr auto;
    gap: 1.5rem;
    align-items: center;
  }
}

.model-code {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.model h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.model p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.98rem;
}

.model-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--ink);
}

.model-specs span {
  border-left: 2px solid var(--accent-2);
  padding-left: 0.55rem;
}

.model-price {
  text-align: left;
}

@media (min-width: 800px) {
  .model-price {
    text-align: right;
    min-width: 140px;
  }
}

.model-price strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.model-price a {
  font-weight: 800;
  text-decoration: none;
  color: var(--accent);
}

/* Feature rail */
.feature-rail {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 800px) {
  .feature-rail {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  padding: 0;
  border: none;
  background: transparent;
}

.feature .num {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.feature h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.feature p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.98rem;
}

/* Steps */
.steps {
  counter-reset: step;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 800px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step {
  border-top: 3px solid var(--accent);
  padding-top: 1rem;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-2);
  display: block;
  margin-bottom: 0.5rem;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-family: var(--font-display);
}

.step p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.95rem;
}

/* Calculator */
.calc {
  display: grid;
  gap: 1.5rem;
  background: linear-gradient(145deg, rgba(26, 43, 37, 0.9), rgba(19, 32, 28, 0.95));
  border: 1px solid var(--line);
  padding: 1.5rem;
}

@media (min-width: 800px) {
  .calc {
    grid-template-columns: 1.1fr 0.9fr;
    padding: 2rem;
  }
}

.calc label {
  display: block;
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.calc select,
.calc input {
  width: 100%;
  padding: 0.75rem 0.85rem;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.calc-result {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  align-self: center;
}

.calc-result dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.55rem 1rem;
  margin: 0;
}

.calc-result dt {
  color: var(--ink-dim);
}

.calc-result dd {
  margin: 0;
  font-family: var(--font-display);
  text-align: right;
}

.calc-note {
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin-top: 1rem;
}

/* Table */
.table-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  text-align: left;
  padding: 0.9rem 0.75rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::before {
  content: "+";
  color: var(--accent);
  margin-right: 0.6rem;
  font-family: var(--font-display);
}

.faq details[open] summary::before {
  content: "−";
}

.faq details p {
  color: var(--ink-dim);
  margin: 0.75rem 0 0.25rem;
}

/* Quotes */
.quotes {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 800px) {
  .quotes {
    grid-template-columns: repeat(3, 1fr);
  }
}

.quote {
  border-top: 3px solid var(--accent-2);
  padding-top: 1rem;
}

.quote p {
  margin: 0 0 1rem;
  font-size: 0.98rem;
}

.quote cite {
  font-style: normal;
  color: var(--ink-dim);
  font-size: 0.88rem;
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 800px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.contact-list strong {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 0.25rem;
}

.form-field {
  margin-bottom: 1rem;
}

.form-field label {
  display: block;
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  font: inherit;
}

.form-status {
  min-height: 1.5rem;
  font-size: 0.9rem;
  color: var(--accent-2);
  margin-top: 0.75rem;
}

.form-status.error {
  color: var(--danger);
}

/* Page hero (inner) */
.page-hero {
  padding: 3rem 0 2rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
}

.page-hero p {
  max-width: 48ch;
  color: var(--ink-dim);
  margin: 0;
}

.prose {
  max-width: 68ch;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: -0.03em;
  margin: 2.5rem 0 0.85rem;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 1.75rem 0 0.6rem;
}

.prose p,
.prose li {
  color: var(--ink-dim);
}

.prose ul {
  padding-left: 1.2rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem;
  margin-top: 2rem;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.site-footer h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0 0 0.75rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin-bottom: 0.4rem;
}

.site-footer a {
  color: var(--ink-dim);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

.footer-copy {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-dim);
}

/* Error page */
.error-page {
  min-height: calc(100svh - var(--nav-h) - 120px);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 0;
}

.error-page h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  margin: 0;
  letter-spacing: -0.05em;
  color: var(--accent);
}