:root {
  --ink: #071014;
  --ink-soft: #152126;
  --paper: #f4f1e9;
  --paper-strong: #fffaf0;
  --muted: #627071;
  --line: rgba(255, 255, 255, 0.16);
  --line-dark: rgba(7, 16, 20, 0.12);
  --teal: #20b7b3;
  --teal-dark: #116e70;
  --amber: #f2a60d;
  --green: #88b86a;
  --error: #b42318;
  --white: #ffffff;
  --shadow: 0 28px 80px rgba(5, 12, 15, 0.24);
  color-scheme: dark light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
  letter-spacing: 0;
}

.site-skip {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--paper-strong);
  color: var(--ink);
  padding: 0.7rem 1rem;
  border-radius: 999px;
}

.site-skip:focus {
  transform: translateY(0);
}

.site-hero {
  position: relative;
  min-height: min(860px, 88vh);
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(4, 9, 12, 0.94) 0%, rgba(5, 11, 14, 0.82) 38%, rgba(5, 11, 14, 0.34) 70%, rgba(5, 11, 14, 0.5) 100%),
    linear-gradient(180deg, rgba(4, 9, 12, 0.1), rgba(4, 9, 12, 0.58)),
    url("../img/servastehno-hero.webp") center / cover no-repeat;
  color: var(--white);
}

.site-nav {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 760;
  font-size: 1.22rem;
}

.site-brand img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.site-nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px;
  border: 1px solid var(--line);
  background: rgba(8, 18, 22, 0.5);
  backdrop-filter: blur(16px);
  border-radius: 999px;
}

.site-nav-links a,
.site-language {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  font-size: 0.92rem;
}

.site-language {
  min-width: 46px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  font-weight: 760;
}

.site-nav-links a:hover,
.site-nav-links a:focus-visible,
.site-language:hover,
.site-language:focus-visible {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
}

.site-hero-copy {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 82px 0 42px;
  align-self: end;
}

.site-eyebrow,
.site-kicker {
  margin: 0 0 18px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
  letter-spacing: 0;
}

.site-hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: 7.5rem;
  line-height: 0.88;
  font-weight: 840;
  letter-spacing: 0;
}

.site-lead {
  max-width: 710px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.45rem;
  line-height: 1.38;
}

.site-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.site-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 760;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.site-button-primary {
  background: var(--amber);
  color: #211405;
}

.site-button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.site-button:hover,
.site-button:focus-visible {
  transform: translateY(-1px);
}

.site-hero-strip {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto 26px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  background: rgba(8, 18, 22, 0.64);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.site-hero-strip div {
  min-height: 84px;
  padding: 18px 22px;
  display: grid;
  align-content: center;
  gap: 6px;
}

.site-hero-strip div + div {
  border-left: 1px solid var(--line);
}

.site-hero-strip strong {
  color: var(--white);
  font-size: 0.98rem;
}

.site-hero-strip span {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.45;
}

.site-section,
.site-band,
.site-contact {
  padding: 112px max(20px, calc((100vw - 1180px) / 2));
}

.site-section-head {
  max-width: 820px;
  margin-bottom: 34px;
}

.site-section-head-compact {
  max-width: 620px;
}

.site-section-head h2,
.site-contact h2 {
  margin: 0;
  font-size: 3.85rem;
  line-height: 0.98;
  letter-spacing: 0;
}

.site-section-head p:not(.site-kicker) {
  max-width: 680px;
  margin: 22px 0 0;
  color: #4f5b5c;
  font-size: 1.12rem;
  line-height: 1.65;
}

.site-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.site-service-card {
  min-height: 268px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: var(--paper-strong);
}

.site-service-card:nth-child(2n) {
  background: #e8eee8;
}

.site-service-card:nth-child(3n) {
  background: #eef4f3;
}

.site-service-index {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  color: var(--teal-dark);
  font-weight: 800;
}

.site-service-card h3,
.site-method-grid h3,
.site-case-list h3,
.site-stack h3,
.site-contact-form h3 {
  margin: 0 0 12px;
  font-size: 1.34rem;
  line-height: 1.15;
}

.site-service-card p,
.site-method-grid p,
.site-case-list p,
.site-contact-panel p,
.site-contact-panel li,
.site-form-note {
  margin: 0;
  color: #536061;
  line-height: 1.62;
}

.site-band {
  background: var(--ink);
  color: var(--white);
}

.site-band .site-kicker {
  color: var(--green);
}

.site-method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.site-method-grid article {
  min-height: 284px;
  padding: 26px;
  background: #0e191d;
}

.site-method-grid span {
  width: 44px;
  height: 44px;
  margin-bottom: 62px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--teal);
  color: #031114;
  font-weight: 820;
}

.site-method-grid p {
  color: rgba(255, 255, 255, 0.68);
}

.site-case-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
  gap: 18px;
  align-items: stretch;
}

.site-case-list {
  display: grid;
  gap: 12px;
}

.site-case-list article,
.site-stack,
.site-contact-panel,
.site-contact-form {
  padding: 26px;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: var(--white);
}

.site-stack {
  background: var(--ink-soft);
  color: var(--white);
}

.site-stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.site-stack-grid span {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.06);
}

.site-contact {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(430px, 1.05fr);
  gap: 44px;
  align-items: start;
  background: #dfe7e3;
}

.site-contact-grid {
  display: grid;
  gap: 16px;
}

.site-contact-panel,
.site-contact-form {
  box-shadow: 0 18px 60px rgba(43, 52, 48, 0.12);
}

.site-contact-panel ul {
  margin: 20px 0 0;
  padding-left: 1.1rem;
}

.site-contact-form {
  display: grid;
  gap: 16px;
}

.site-contact-form h3 {
  margin-bottom: 0;
}

.site-field {
  display: grid;
  gap: 7px;
  color: #253236;
  font-weight: 720;
}

.site-input {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid rgba(7, 16, 20, 0.18);
  border-radius: 8px;
  background: #fbfcf8;
  color: var(--ink);
  outline: none;
}

.site-textarea {
  min-height: 132px;
  resize: vertical;
}

.site-input:focus {
  border-color: var(--teal-dark);
  box-shadow: 0 0 0 3px rgba(32, 183, 179, 0.18);
}

.site-field small,
.site-form-errors {
  color: var(--error);
  font-weight: 650;
}

.site-form-success {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid rgba(31, 112, 55, 0.18);
  border-radius: 8px;
  background: #e7f4e6;
  color: #1f7037;
  line-height: 1.45;
}

.site-form-note {
  font-size: 0.94rem;
}

.site-hp-wrap {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.site-hp-wrap .site-hp {
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
}

.site-footer {
  min-height: 86px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: #071014;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.95rem;
}

.site-footer span:first-child {
  color: var(--white);
  font-weight: 780;
}

@media (max-width: 1080px) {
  .site-hero h1 {
    font-size: 5.4rem;
  }

  .site-section-head h2,
  .site-contact h2 {
    font-size: 3.2rem;
  }

  .site-service-grid,
  .site-method-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .site-nav {
    align-items: flex-start;
  }

  .site-nav-links {
    display: none;
  }

  .site-hero {
    min-height: 86vh;
    background-position: 58% center;
  }

  .site-hero-copy {
    padding-top: 86px;
  }

  .site-hero h1 {
    font-size: 4rem;
  }

  .site-hero-strip,
  .site-case-layout {
    grid-template-columns: 1fr;
  }

  .site-hero-strip div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .site-service-card,
  .site-method-grid article {
    min-height: 220px;
  }

  .site-method-grid span {
    margin-bottom: 38px;
  }
}

@media (max-width: 640px) {
  .site-nav,
  .site-hero-copy,
  .site-hero-strip {
    width: min(100% - 28px, 1180px);
  }

  .site-hero {
    min-height: auto;
    background:
      linear-gradient(180deg, rgba(4, 9, 12, 0.95) 0%, rgba(4, 9, 12, 0.84) 50%, rgba(4, 9, 12, 0.72) 100%),
      url("../img/servastehno-hero.webp") 64% center / cover no-repeat;
  }

  .site-brand {
    font-size: 1.06rem;
  }

  .site-hero-copy {
    padding: 72px 0 38px;
  }

  .site-hero h1 {
    font-size: 3.05rem;
  }

  .site-lead {
    font-size: 1.06rem;
  }

  .site-button {
    width: 100%;
  }

  .site-section,
  .site-band,
  .site-contact {
    padding: 64px 14px;
  }

  .site-section-head h2,
  .site-contact h2 {
    font-size: 2.22rem;
  }

  .site-service-grid,
  .site-method-grid {
    grid-template-columns: 1fr;
  }

  .site-service-card,
  .site-method-grid article,
  .site-case-list article,
  .site-stack,
  .site-contact-panel,
  .site-contact-form {
    padding: 20px;
  }

  .site-footer {
    min-height: 112px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
  }
}