:root {
  color-scheme: dark;
  --bg: #070706;
  --ink: #f5efe3;
  --muted: #b8aa94;
  --line: rgba(245, 239, 227, 0.18);
  --gold: #c5a15b;
  --gold-soft: rgba(197, 161, 91, 0.18);
  --paper: #ece2cf;
  --paper-ink: #16120d;
  --danger: #f29c8f;
  --success: #bdd8a6;
  font-family: Jost, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 52% 0%, rgba(197, 161, 91, 0.08), transparent 30rem),
    linear-gradient(180deg, #090807 0%, var(--bg) 100%);
  color: var(--ink);
  min-width: 320px;
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 7, 6, 0.82);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.86rem;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
}

.nav-links {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.88fr);
  align-items: center;
  gap: 56px;
  padding: 72px 0 48px;
}

.eyebrow {
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  margin: 0 0 22px;
}

h1,
h2,
h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

h1 {
  font-size: 8.8rem;
  line-height: 0.86;
  margin: 0 0 26px;
}

.lead {
  max-width: 560px;
  color: var(--muted);
  font-size: 1.22rem;
  line-height: 1.7;
  margin: 0 0 34px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.button {
  border: 1px solid var(--gold);
  background: var(--gold);
  color: #100d09;
  padding: 15px 22px;
  min-height: 52px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
  background: #d6b46e;
}

.button:disabled {
  cursor: wait;
  opacity: 0.68;
}

.ghost-button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.price-note {
  color: var(--muted);
}

.certificate-stage {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
}

.certificate {
  width: min(100%, 420px);
  aspect-ratio: 0.72;
  padding: 38px 34px;
  color: var(--paper-ink);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.7), transparent 28%),
    var(--paper);
  border: 1px solid rgba(22, 18, 13, 0.24);
  box-shadow: 0 38px 90px rgba(0, 0, 0, 0.55);
}

.certificate-inner {
  height: 100%;
  border: 1px solid rgba(22, 18, 13, 0.28);
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 26px 22px;
  text-align: center;
}

.certificate-kicker,
.certificate-footer {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.certificate-title {
  align-self: center;
}

.certificate-title span {
  display: block;
  color: #77613a;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.certificate-title strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: 4.2rem;
  line-height: 0.9;
}

.section {
  border-top: 1px solid var(--line);
  padding: 78px 0;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 54px;
}

.section h2 {
  font-size: 4.4rem;
  line-height: 1;
  margin: 0;
}

.section p {
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.8;
}

.lot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
}

.lot-item {
  padding: 24px;
  border-right: 1px solid var(--line);
  min-height: 140px;
}

.lot-item:last-child {
  border-right: 0;
}

.lot-item span {
  display: block;
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.lot-item strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  font-weight: 400;
}

.checkout {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 54px;
  align-items: start;
}

.order-summary {
  border: 1px solid var(--line);
  padding: 28px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.summary-row:last-child {
  border-bottom: 0;
}

.summary-row span {
  color: var(--muted);
}

.summary-row strong {
  font-weight: 500;
}

form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

label,
.checkbox {
  color: var(--ink);
}

.field span {
  color: var(--muted);
  font-size: 0.92rem;
}

input,
textarea {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--ink);
  padding: 13px 14px;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-soft);
}

textarea {
  min-height: 92px;
  resize: vertical;
}

.checkbox {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  align-items: start;
  color: var(--muted);
  line-height: 1.55;
}

.checkbox input {
  width: 18px;
  min-height: 18px;
  margin-top: 3px;
}

.nested-fields {
  display: grid;
  gap: 16px;
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.form-status {
  min-height: 24px;
  color: var(--muted);
}

.form-status[data-tone="error"] {
  color: var(--danger);
}

.form-status[data-tone="success"] {
  color: var(--success);
}

.legal-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.legal-list a {
  color: var(--muted);
}

.requisites-list {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  border-top: 1px solid var(--line);
}

.requisites-list div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.requisites-list dt {
  color: var(--muted);
}

.requisites-list dd {
  margin: 0;
  color: var(--ink);
}

.page {
  padding: 70px 0;
  max-width: 860px;
}

.page h1 {
  font-size: 6.2rem;
}

.page h2 {
  margin-top: 38px;
  font-size: 2rem;
}

.order-panel {
  border: 1px solid var(--line);
  padding: 32px;
  margin-top: 28px;
}

.certificate-number {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4.2rem;
  margin: 18px 0;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  color: var(--muted);
}

.footer .shell {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    padding: 16px 0;
  }

  .nav-links {
    display: none;
  }

  .hero,
  .split,
  .checkout {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 44px;
  }

  h1 {
    font-size: 5.8rem;
  }

  .section h2 {
    font-size: 3.4rem;
  }

  .page h1 {
    font-size: 4.7rem;
  }

  .certificate-number {
    font-size: 3.4rem;
  }

  .certificate-stage {
    min-height: auto;
  }

  .lot-grid {
    grid-template-columns: 1fr 1fr;
  }

  .lot-item:nth-child(2) {
    border-right: 0;
  }

  .lot-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 22px, 1120px);
  }

  .lot-grid {
    grid-template-columns: 1fr;
  }

  .lot-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .lot-item:last-child {
    border-bottom: 0;
  }

  .button {
    width: 100%;
    text-align: center;
  }

  .requisites-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  h1 {
    font-size: 4.1rem;
  }

  .section h2,
  .page h1 {
    font-size: 3rem;
  }

  .certificate-number {
    font-size: 2.5rem;
  }
}