:root {
  --bg: #ffffff;
  --text-primary: #111111;
  --text-secondary: #444444;
  --accent: #2563eb;
  --glass-gray-bg: rgba(164, 170, 179, 0.28);
  --glass-gray-bg-hover: rgba(164, 170, 179, 0.4);
  --glass-gray-border: rgba(255, 255, 255, 0.42);
  --glass-gray-text: #737b85;
  --surface-light: #f5f5f5;
  --line: #e8e8e8;
  --max-width: 1100px;
  --container-inline: 2.5rem;
  --nav-height: 5.75rem;
  --section-space: 120px;
  --grid-gap: 40px;
  --content-text-size: 18px;
  --radius: 12px;
  --shadow-soft: 0 8px 24px rgba(17, 17, 17, 0.07);
}

/* Base styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg);
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
.logo {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
}

.container {
  width: min(calc(100% - var(--container-inline)), var(--max-width));
  margin-inline: auto;
}

.section {
  padding: var(--section-space) 0;
}

.section-muted {
  background: var(--surface-light);
}

.section-heading {
  margin-bottom: 2.75rem;
}

.section-heading h2 {
  position: relative;
  display: inline-block;
  padding-right: 0.58em;
  font-size: 36px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: 0;
}

.section-heading h2::after {
  content: "/>";
  position: absolute;
  right: -2px;
  top: calc(-0.28em + 2px);
  font-size: 0.46em;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--glass-gray-text);
}

/* Sticky header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.18em;
  padding: 0.25rem 0;
  font-size: clamp(18px, 2.1vw, 28px);
  font-weight: 700;
  letter-spacing: 0.07em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.logo-wordmark {
  color: var(--text-primary);
}

.logo-mark {
  font-size: 0.74em;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--glass-gray-text);
  transform: translateY(-0.32em);
  transition: color 150ms ease;
}

.logo:hover .logo-mark,
.logo:focus-visible .logo-mark {
  color: rgba(115, 123, 133, 0.95);
}

.menu {
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  margin: 0;
  padding: 1rem 1.25rem 1.25rem;
  list-style: none;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 0.7rem;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.menu a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: opacity 150ms ease;
}

.menu a:hover,
.menu a:focus-visible {
  opacity: 0.65;
}

.nav-toggle {
  margin-left: auto;
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-content: center;
  gap: 0.32rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.nav-toggle span {
  width: 1rem;
  height: 2px;
  background: var(--text-primary);
}

.lang-toggle {
  margin-left: 0.5rem;
  min-width: 4.25rem;
  height: 2.75rem;
  padding: 0 0.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  font-family: "Space Grotesk", sans-serif;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.lang-toggle [data-lang-option] {
  color: var(--text-secondary);
  transition: color 150ms ease;
}

.lang-toggle [data-lang-option].is-active {
  color: var(--text-primary);
  font-weight: 700;
}

.lang-divider {
  color: var(--text-secondary);
  opacity: 0.7;
}

.hero {
  padding: 180px 0 170px;
}

/* Hero typography follows the fixed scale from the brief */
.hero-content {
  max-width: 840px;
  margin-inline: auto;
  text-align: left;
}

h1 {
  font-size: 64px;
  line-height: 1.04;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-wrap: balance;
  max-width: 12ch;
}

#hero-title::after {
  content: "/>";
  display: inline-block;
  margin-left: 0.16em;
  font-size: 0.33em;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--glass-gray-text);
  transform: translate(3px, calc(-0.34em - 10px));
  vertical-align: baseline;
}

.hero-subtitle {
  margin: 1.7rem 0 0;
  font-size: 22px;
  line-height: 1.45;
  color: var(--text-secondary);
  max-width: 34ch;
}

.hero-intro {
  margin: 1.4rem 0 0;
  font-size: 14px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.hero-actions,
.contact-actions {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-start;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.62rem 1.25rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  transition: opacity 150ms ease, transform 150ms ease, background-color 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  opacity: 0.88;
}

.button-primary {
  background: rgba(255, 255, 255, 0.24);
  border-color: rgba(255, 255, 255, 0.56);
  color: var(--text-primary);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: 0 14px 32px rgba(17, 17, 17, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.78);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: rgba(255, 255, 255, 0.32);
}

.button-secondary,
.button-link {
  background: var(--bg);
  border-color: var(--line);
  color: var(--text-primary);
}

.projects-grid,
.services-grid {
  display: grid;
  gap: var(--grid-gap);
}

/* Card system for work and services */
.project-card,
.service-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform 180ms ease;
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-4px);
}

.project-card img {
  width: 100%;
  height: auto;
}

.card-content,
.service-card {
  padding: 1.4rem;
}

.card-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}

h3 {
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  font-weight: 600;
}

.card-content p,
.service-card p,
.about-block p,
.contact-block p {
  margin: 0.8rem 0 0;
  font-size: var(--content-text-size);
  color: var(--text-secondary);
}

.card-content .button-link {
  margin-top: auto;
  align-self: flex-start;
}

.about-block,
.contact-block {
  max-width: 780px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
}

.footer-layout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.1rem;
}

.footer-copy {
  min-width: 0;
}

.site-footer p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.18em;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(13px, 1.45vw, 17px);
  font-weight: 700;
  letter-spacing: 0.07em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text-primary);
}

.footer-brand-wordmark {
  color: var(--text-primary);
}

.footer-brand-mark {
  font-size: 0.74em;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--glass-gray-text);
  transform: translateY(-0.32em);
}

.footer-top-link {
  display: inline-flex;
  align-items: flex-start;
  justify-content: center;
  flex-shrink: 0;
  margin-top: calc(clamp(13px, 1.45vw, 17px) + 0.45rem);
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(38px, 5.5vw, 58px);
  line-height: 0.78;
  letter-spacing: 0.02em;
  color: var(--glass-gray-text);
  transition: color 150ms ease, transform 150ms ease;
}

.footer-top-link:hover,
.footer-top-link:focus-visible {
  color: rgba(115, 123, 133, 0.95);
  transform: translateY(-1px);
}

.site-footer p + p {
  margin-top: 0.45rem;
}

/* Desktop navigation and grid columns */
@media (min-width: 780px) {
  .menu {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    border: 0;
    padding: 0;
    background: transparent;
    display: flex;
    align-items: center;
    gap: 1.4rem;
    margin-left: auto;
  }

  .nav-toggle {
    display: none;
  }

  .lang-toggle {
    margin-left: 0.65rem;
  }

  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .services-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 779px) {
  :root {
    --container-inline: 1.5rem;
    --nav-height: 4.85rem;
    --grid-gap: 1.2rem;
    --content-text-size: 16px;
  }

  .nav {
    gap: 0.65rem;
  }

  .logo {
    font-size: clamp(14px, 4.8vw, 20px);
    letter-spacing: 0.06em;
    gap: 0.14em;
  }

  .menu {
    padding: 0.95rem 1rem 1.1rem;
  }

  .lang-toggle {
    min-width: 3.95rem;
    height: 2.5rem;
    padding: 0 0.58rem;
    font-size: 11px;
  }

  .menu a {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
  }

  .section {
    padding: 84px 0;
  }

  .hero {
    padding: 122px 0 96px;
  }

  h1 {
    font-size: clamp(36px, 11vw, 52px);
    line-height: 1.08;
    max-width: 100%;
  }

  .hero-subtitle {
    margin-top: 1.25rem;
    font-size: 18px;
    max-width: 100%;
  }

  .hero-actions,
  .contact-actions {
    margin-top: 2rem;
  }

  .section-heading {
    margin-bottom: 2rem;
  }

  .section-heading h2 {
    font-size: 30px;
  }

  h3 {
    font-size: 21px;
  }

  .button {
    min-height: 2.7rem;
    padding: 0.56rem 1rem;
    font-size: 13px;
  }

  .footer-top-link {
    font-size: clamp(34px, 12vw, 46px);
  }
}

@media (max-width: 480px) {
  :root {
    --container-inline: 1.1rem;
    --nav-height: 4.35rem;
  }

  .hero {
    padding: 98px 0 76px;
  }

  h1 {
    font-size: clamp(32px, 10.5vw, 40px);
  }

  .hero-actions,
  .contact-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
  }

  .hero-actions .button,
  .contact-actions .button {
    width: 100%;
  }

  .site-footer p {
    font-size: 13px;
    line-height: 1.45;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}