:root {
  color-scheme: dark;
  --bg-main: #080B10;
  --bg-secondary: #0D1118;
  --surface: #121823;
  --surface-strong: #181F2D;
  --text-primary: #F3F5F7;
  --text-secondary: #A7B0BE;
  --text-muted: #737D8C;
  --border: #202938;
  --border-strong: #303B4D;
  --accent: #5A8CFF;
  --accent-soft: rgba(90, 140, 255, 0.10);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.14);
  --radius: 20px;
  --radius-sm: 14px;
  --max-width: 1180px;
  --spacing: 24px;
  --font-sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
}

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

button, input, select, textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

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

::selection {
  background: rgba(90, 140, 255, 0.24);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(90, 140, 255, 0.12), transparent 28%), radial-gradient(circle at bottom right, rgba(124, 183, 255, 0.08), transparent 20%);
  pointer-events: none;
  z-index: -1;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(8, 11, 16, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand__logo {
  display: block;
  width: 200px;
  max-width: 100%;
  height: auto;
}

.site-navigation {
  display: flex;
  flex: 1;
  justify-content: center;
}

.nav-links,
.mobile-nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav-links a,
.mobile-nav-links a,
.footer-links a,
.contact-panel__link {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a.is-active,
.mobile-nav-links a.is-active {
  color: var(--accent);
}

.nav-links a:hover,
.mobile-nav-links a:hover,
.footer-links a:hover,
.contact-panel__link:hover {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.language-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.language-select {
  min-width: 11rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-primary);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.9rem 1.4rem;
  font-weight: 600;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.button--primary {
  background: var(--accent);
  color: #0B1320;
}

.button--secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.07);
}

.button:hover,
.button:focus-visible {
  outline: none;
}

.button--primary:hover,
.button--primary:focus-visible {
  background: #4273d6;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text-primary);
}

.mobile-menu {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.mobile-menu[hidden] {
  display: none;
}

.section {
  padding: 5rem 0;
}

.section-header {
  max-width: 72ch;
  margin-bottom: 2.5rem;
}

.section-label {
  display: inline-block;
  margin-bottom: 1rem;
  letter-spacing: 0.18em;
  font-size: 0.79rem;
  text-transform: uppercase;
  color: var(--accent);
}

.section h2,
.hero h1 {
  margin: 0;
  line-height: 1.02;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 1fr);
  gap: 3rem;
  align-items: center;
}

.hero__content {
  max-width: 42rem;
}

.eyebrow {
  margin: 0 0 1.2rem;
  color: var(--accent);
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.8rem, 5vw, 4.4rem);
  max-width: 14ch;
}

.hero__text,
.section-description,
.hero__note,
.service-card p,
.experience-card h3,
.project-card p,
.tech-group p,
.contact-panel__label,
.footer-meta,
.footer-brand,
.contact-panel__link {
  color: var(--text-secondary);
}

.hero__text {
  margin: 1.6rem 0 2rem;
  max-width: 46rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__note {
  margin: 1.8rem 0 0;
  color: var(--text-muted);
}

.hero__visual {
  display: flex;
  justify-content: center;
}

.visual-panel {
  position: relative;
  width: min(100%, 360px);
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: radial-gradient(circle at top left, rgba(90, 140, 255, 0.12), transparent 36%), var(--surface-strong);
  border: 1px solid var(--border-strong);
}

.visual-panel::before {
  content: "";
  position: absolute;
  inset: 1.5rem;
  border: 1px solid rgba(90, 140, 255, 0.12);
  border-radius: 16px;
}

.visual-chip {
  position: absolute;
  top: 2rem;
  left: 2rem;
  width: 3.2rem;
  height: 0.8rem;
  border-radius: 999px;
  background: rgba(90, 140, 255, 0.24);
}

.visual-line {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
}

.visual-line--horizontal {
  top: 4.5rem;
  left: 2.5rem;
  width: 45%;
  height: 1px;
}

.visual-line--vertical {
  bottom: 2.5rem;
  right: 2.5rem;
  width: 1px;
  height: 40%;
}

.visual-node {
  position: absolute;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(90, 140, 255, 0.95), #4E76D8);
}

.visual-node--primary {
  top: 6rem;
  right: 2.5rem;
}

.visual-block {
  position: absolute;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.visual-block--tall {
  bottom: 3rem;
  left: 2.5rem;
  width: 38%;
  height: 24%;
}

.visual-block--small {
  top: 13rem;
  left: 3rem;
  width: 22%;
  height: 18%;
}

.visual-grid {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem;
}

.visual-grid span {
  display: block;
  width: 1.2rem;
  height: 1.2rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
}

.services-grid,
.approach-grid,
.experience-grid,
.project-grid,
.technology-grid {
  display: grid;
  gap: 1.5rem;
}

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

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.8rem;
}

.service-card--highlight {
  background: linear-gradient(180deg, rgba(90, 140, 255, 0.08), rgba(18, 24, 35, 0.92));
  border-color: rgba(90, 140, 255, 0.2);
}

.service-card h3,
.approach-step h3,
.experience-card h3,
.project-card h3,
.tech-group h3 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.service-card ul,
.tech-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.service-card li::before {
  content: "•";
  display: inline-block;
  width: 1rem;
  color: var(--accent);
}

.approach-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.approach-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
}

.approach-step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  margin-bottom: 1rem;
  border-radius: 50%;
  background: rgba(90, 140, 255, 0.14);
  color: var(--accent);
  font-weight: 700;
}

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

.experience-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2rem;
}

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

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.8rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.project-tags span {
  display: inline-flex;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(90, 140, 255, 0.09);
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.projects-note {
  margin-top: 1.5rem;
  color: var(--text-muted);
}

.technology-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tech-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
}

.tech-group ul {
  display: grid;
  gap: 0.75rem;
  margin: 0.75rem 0 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2rem;
}

.form-row {
  display: grid;
  gap: 0.65rem;
}

.form-row--full {
  grid-column: 1/-1;
}

label {
  color: var(--text-primary);
  font-size: 0.95rem;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  background: #0e1524;
  color: var(--text-primary);
  padding: 0.95rem 1rem;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
.button:focus-visible,
.menu-toggle:focus-visible,
.back-to-top:focus-visible {
  outline: 3px solid rgba(90, 140, 255, 0.35);
  outline-offset: 3px;
}

.form-footer {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-panel {
  display: grid;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
}

.contact-panel__item {
  display: grid;
  gap: 0.35rem;
}

.contact-panel__label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-panel__link {
  color: var(--text-primary);
  word-break: break-all;
}

.form-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  font-weight: 600;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.back-to-top {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-primary);
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
}

.footer-meta {
  margin-top: 1.25rem;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .services-grid,
  .project-grid,
  .technology-grid,
  .experience-grid,
  .approach-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 760px) {
  .site-header__inner {
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .site-navigation {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-actions {
    gap: 0.75rem;
  }

  .language-select {
    min-width: 8rem;
  }

  .brand__logo {
    width: 180px;
  }

  .services-grid,
  .project-grid,
  .technology-grid,
  .experience-grid,
  .approach-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 3.5rem 0;
  }

  .hero__content {
    max-width: none;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 7vw, 3.4rem);
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 1.4rem, var(--max-width));
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .brand__logo {
    width: 160px;
  }

  .button {
    width: 100%;
  }

  .hero__actions {
    flex-direction: column;
  }

  .visual-panel {
    width: 100%;
  }
}

[data-reveal] {
  transition: opacity 0.55s ease, transform 0.55s ease;
}

html.reveal-animations-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
}

html.reveal-animations-reduced [data-reveal] {
  opacity: 0;
  transform: none;
  transition: opacity 0.22s ease-out;
}

html.reveal-animations-enabled [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

html.reveal-animations-reduced [data-reveal].is-revealed,
[data-reveal].is-revealed {
  opacity: 1;
}

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

  html.reveal-animations-reduced [data-reveal] {
    transition-property: opacity !important;
    transition-duration: 0.22s !important;
    transition-timing-function: ease-out !important;
    transition-delay: 0s !important;
  }
}