:root {
  --bg: #000000;
  --bg-alt: #0a0a0a;
  --fg: #ffffff;
  --fg-dim: #9a9a9a;
  --accent: #ffffff;
  --accent-2: #ffffff;
  --border: #2a2a2a;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Space Grotesk', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

.bg-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 20% 10%, rgba(255,255,255,0.05), transparent 40%),
              radial-gradient(circle at 80% 60%, rgba(255,255,255,0.04), transparent 45%);
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: rgba(10,12,16,0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav__brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); }
.nav__mark { color: var(--accent); font-weight: 700; }
.nav__logo { height: 26px; width: auto; display: block; }
.nav__name { font-size: 13px; letter-spacing: 0.12em; color: var(--fg-dim); }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__links { display: flex; gap: 32px; font-size: 14px; }
.nav__links a {
  color: var(--fg-dim);
  transition: color 0.2s;
  position: relative;
  padding-bottom: 6px;
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--fg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav__links a:hover { color: var(--accent); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__links a.is-active { color: var(--fg); }
.nav__links a.is-active::after { transform: scaleX(1); }

main { max-width: 1100px; margin: 0 auto; padding: 0 48px; }

.hero {
  padding: 140px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero__tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  display: none;
  margin-bottom: 28px;
}

.hero__title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin-bottom: 28px;
}

.accent {
  color: var(--accent);
  text-shadow: 0 0 24px rgba(255,255,255,0.35);
}

.hero__sub {
  max-width: 620px;
  font-size: 18px;
  color: var(--fg-dim);
  margin-bottom: 40px;
}

.hero__cta { display: flex; gap: 16px; margin-bottom: 56px; flex-wrap: wrap; }

.btn {
  font-family: var(--mono);
  font-size: 14px;
  padding: 14px 24px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all 0.2s;
  display: inline-block;
}

.btn--primary {
  background: var(--accent);
  color: #000000;
  font-weight: 600;
  border-color: var(--accent);
}
.btn--primary:hover { box-shadow: 0 0 28px rgba(255,255,255,0.25); transform: translateY(-1px); }

.btn--ghost { color: var(--fg-dim); }
.btn--ghost:hover { color: var(--fg); border-color: var(--fg-dim); }

.btn--lg { padding: 18px 32px; font-size: 16px; }

.hero__metrics {
  display: flex;
  gap: 48px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
  flex-wrap: wrap;
}

.metric { display: flex; flex-direction: column; gap: 4px; }
.metric__num { font-family: var(--mono); font-size: 22px; color: var(--accent); }
.metric__label { font-size: 12px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.08em; }

.section { padding: 96px 0; border-top: 1px solid var(--border); }
.section--alt { background: var(--bg-alt); margin: 0 -48px; padding: 96px 48px; }

.section--light {
  position: relative;
  border-top: none;
  --fg: #0a0a0a;
  --fg-dim: #5a5a5a;
  --border: #e2e2e2;
  --accent: #0a0a0a;
  --accent-2: #0a0a0a;
  color: var(--fg);
}
.section--light::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: #ffffff;
  border-top: 1px solid #e2e2e2;
  z-index: -1;
}
.section--light .approach-card,
.section--light .team-card { background: rgba(0,0,0,0.02); }
.section--light .accent { text-shadow: none; }

.section--light .contact-form { background: #ffffff; box-shadow: none; }
.section--light .contact-form input,
.section--light .contact-form select,
.section--light .contact-form textarea { background: rgba(0,0,0,0.02); }
.section--light .btn--primary { background: #0a0a0a; color: #ffffff; border-color: #0a0a0a; }

.section__head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 28px; }
.section__index { font-family: var(--mono); color: var(--accent); font-size: 14px; }
.section__head h2 { font-size: clamp(28px, 4vw, 38px); font-weight: 700; }

.section__body { max-width: 720px; color: var(--fg-dim); font-size: 17px; margin-bottom: 16px; }
.section__body strong { color: var(--fg); }
.section__body em { color: var(--accent); font-style: normal; }

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.approach-grid--pairs { grid-template-columns: repeat(2, 1fr); }

.approach-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  background: rgba(255,255,255,0.015);
  transition: border-color 0.2s, transform 0.2s;
}
.approach-card:hover { border-color: var(--accent); transform: translateY(-3px); }

.process-flow {
  display: flex;
  align-items: stretch;
}

.process-step {
  position: relative;
  flex: 1 1 0;
  padding: 26px 18px 20px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.015);
  overflow: hidden;
  transition: border-color 0.2s, background 0.2s;
}
.process-step:hover { border-color: var(--accent); background: rgba(255,255,255,0.03); }
.process-step + .process-step { border-left: none; }

.process-step__label {
  position: relative;
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.process-step h3 { position: relative; font-size: 16px; margin-bottom: 8px; }
.process-step p { position: relative; color: var(--fg-dim); font-size: 13.5px; min-height: 60px; }

.process-connector {
  flex: 0 0 auto;
  width: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
  font-family: var(--mono);
  font-size: 16px;
}
.process-connector::after { content: '→'; }

@media (max-width: 900px) {
  .process-flow { flex-direction: column; }
  .process-step { flex: none; }
  .process-step + .process-step { border-left: 1px solid var(--border); border-top: none; }
  .process-step p { min-height: 0; }
  .process-connector { width: auto; height: 24px; }
  .process-connector::after { content: '↓'; }
}

.approach-card__icon { font-size: 28px; color: var(--accent); margin-bottom: 16px; }
.approach-card h3 { font-size: 18px; margin-bottom: 10px; }
.approach-card p { color: var(--fg-dim); font-size: 15px; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.team-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  background: rgba(255,255,255,0.015);
}

.team-card__img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.team-card__img img { width: 100%; height: 100%; object-fit: cover; display: block; }

.team-card h3 { font-size: 18px; margin-bottom: 4px; }
.team-card__title {
  display: block;
  font-size: 14px;
  color: var(--fg-dim);
  margin-bottom: 4px;
}
.team-card__edu {
  display: block;
  font-size: 12px;
  color: var(--fg-dim);
  opacity: 0.7;
  margin-bottom: 14px;
}
.team-card p { color: var(--fg-dim); font-size: 15px; margin-bottom: 16px; }

.team-card__email {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  padding-top: 14px;
  border-top: 1px solid var(--border);
  width: 100%;
  word-break: break-all;
  transition: color 0.2s;
}
.team-card__email:hover { color: var(--fg-dim); }

.contact { text-align: left; }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 22px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  box-shadow: 0 24px 60px -24px rgba(0,0,0,0.6);
}

.contact-form__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-form__field label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  resize: vertical;
  transition: border-color 0.2s, background 0.2s;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--fg-dim); opacity: 0.6; }

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--fg);
  background: rgba(255,255,255,0.04);
}

.contact-form__submit {
  align-self: stretch;
  text-align: center;
  cursor: pointer;
  margin-top: 4px;
}
.contact-form__submit:disabled { opacity: 0.5; cursor: not-allowed; }

.contact-form__status {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-dim);
  min-height: 18px;
}

@media (max-width: 860px) {
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .contact-form { padding: 28px; }
}

.footer {
  display: flex;
  justify-content: space-between;
  padding: 32px 48px;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
}
.footer__mark { color: var(--accent); }

@media (max-width: 960px) {
  .nav { padding: 16px 24px; flex-wrap: wrap; }
  .nav__toggle { display: flex; }
  .nav__links {
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    font-size: 15px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav__links.is-open { max-height: 400px; }
  .nav__links a {
    padding: 14px 0;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 640px) {
  .approach-grid--pairs { grid-template-columns: 1fr; }
  main { padding: 0 24px; }
  .section--alt { margin: 0 -24px; padding: 72px 24px; }
  .hero { padding: 100px 0 64px; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { text-align: center; }
  .contact-form { padding: 24px; }
  .footer { padding: 24px; flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .nav { padding: 14px 20px; }
  .nav__name { display: none; }
  .hero__tag { display: inline-block; }
  main { padding: 0 20px; }
  .section--alt { margin: 0 -20px; padding: 56px 20px; }
  .hero { padding: 80px 0 48px; }
  .hero__title { font-size: clamp(32px, 9vw, 44px); }
  .hero__sub { font-size: 16px; }
  .section { padding: 64px 0; }
  .section__head h2 { font-size: clamp(24px, 7vw, 30px); }
  .team-grid { gap: 20px; }
  .btn--lg { padding: 16px 24px; font-size: 15px; }
}