/* ===== Design tokens ===== */
:root {
  --bg: #0B0E14;
  --surface: #12161F;
  --surface-alt: #0E1219;
  --border: #232838;
  --text: #E7EAF1;
  --text-muted: #8790A3;
  --accent: #3ED598;
  --accent-dim: rgba(62, 213, 152, 0.12);
  --accent-dev: #E8B84B;
  --accent-dev-dim: rgba(232, 184, 75, 0.12);

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --wrap: 1120px;
  --radius: 10px;
}

/* ===== Reset ===== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}
p { margin: 0 0 1em; color: var(--text-muted); }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}
.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px 1px var(--accent-dim);
}
.brand-accent { color: var(--accent); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-menu a {
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}
.nav-menu a:hover { color: var(--text); }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 2px;
}
.lang-btn.is-active { color: var(--accent); }
.lang-sep { color: var(--border); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Status dot ===== */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
  flex-shrink: 0;
}
.status-dot--ok {
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-dim);
  animation: pulse-ok 2.4s ease-out infinite;
}
.status-dot--dev {
  background: var(--accent-dev);
  box-shadow: 0 0 0 0 var(--accent-dev-dim);
  animation: pulse-dev 2.4s ease-out infinite;
}
@keyframes pulse-ok {
  0% { box-shadow: 0 0 0 0 rgba(62, 213, 152, 0.45); }
  70% { box-shadow: 0 0 0 7px rgba(62, 213, 152, 0); }
  100% { box-shadow: 0 0 0 0 rgba(62, 213, 152, 0); }
}
@keyframes pulse-dev {
  0% { box-shadow: 0 0 0 0 rgba(232, 184, 75, 0.45); }
  70% { box-shadow: 0 0 0 7px rgba(232, 184, 75, 0); }
  100% { box-shadow: 0 0 0 0 rgba(232, 184, 75, 0); }
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  margin: 0 0 1em;
  text-transform: lowercase;
}
.eyebrow--section {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

/* ===== Hero ===== */
.hero { padding: 96px 0 80px; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  color: var(--text);
}
.hero-sub {
  font-size: 1.1rem;
  max-width: 46ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 40px;
}
.hero-graphic svg { width: 100%; height: auto; opacity: 0.9; }
.node-pulse {
  animation: node-glow 2.6s ease-in-out infinite;
  transform-origin: center;
}
@keyframes node-glow {
  0%, 100% { opacity: 0.9; }
  50% { opacity: 0.45; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: #06110C;
  font-weight: 600;
}
.btn--icon {
  padding: 12px;
  width: 44px;
}
.btn--primary:hover { transform: translateY(-1px); background: #56e0ac; }
.btn--ghost {
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Sections ===== */
.section { padding: 88px 0; border-top: 1px solid var(--border); }
.section--alt { background: var(--surface-alt); }
.section h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  color: var(--text);
}
.section-sub {
  max-width: 50ch;
  margin-top: -0.4em;
  margin-bottom: 2.4em;
}

.card-grid {
  display: grid;
  gap: 20px;
  margin-top: 2.4em;
}
.card-grid--services { grid-template-columns: repeat(4, 1fr); }
.card-grid--projects { grid-template-columns: repeat(3, 1fr); }

.service-card, .project-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.service-card:hover, .project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.project-card--link h3::after {
  content: '→';
  display: inline-block;
  margin-left: 8px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.project-card--link:hover h3::after {
  opacity: 1;
  transform: translateX(0);
}
.service-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.9em;
  letter-spacing: 0.02em;
}
.service-card h3, .project-card h3 {
  font-size: 1.08rem;
  color: var(--text);
}
.service-card p, .project-card p { font-size: 0.92rem; margin-bottom: 0; }

.project-status {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 1em;
}
.project-tags {
  margin-top: 1em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 0.9em;
}

/* ===== Contact ===== */
.section--contact { text-align: center; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }
.contact-inner .eyebrow { justify-content: center; }
.contact-actions { justify-content: center; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-sep { color: var(--border); }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-graphic { order: -1; max-width: 320px; margin: 0 auto; }
  .card-grid--services { grid-template-columns: repeat(2, 1fr); }
  .card-grid--projects { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav-menu.open { max-height: 320px; }
  .nav-menu a, .nav-menu .lang-switch {
    width: 100%;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
  }
  .nav-menu a { box-sizing: border-box; }

  .hero { padding: 56px 0 56px; }
  .section { padding: 64px 0; }
  .card-grid--services { grid-template-columns: 1fr; }
  .card-grid--projects { grid-template-columns: 1fr; }
  .hero-actions, .contact-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
}