:root {
  --bg: #ffffff;
  --text: #0a0a0a;
  --text-muted: #737373;
  --border: #e5e5e5;
  --accent: #0a0a0a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a:not(.btn):not(.lang-switcher) {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color .2s;
}

.nav-links a:not(.btn):not(.lang-switcher):hover {
  color: var(--text);
}

.lang-switcher {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all .2s;
}

.lang-switcher:hover {
  color: var(--text);
  border-color: var(--text);
}

/* Hero */
.hero {
  padding: 140px 0 100px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 32px;
  color: var(--text-muted);
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* Sections */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all .2s;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text);
}

.btn-block {
  display: block;
  width: 100%;
}

/* Lab Features */
.lab-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 64px;
}

.lab-feature {
  text-align: center;
}

.lab-feature h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.lab-feature p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* Solutions */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.solution-card {
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color .2s;
}

.solution-card:hover {
  border-color: var(--text);
}

.solution-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.solution-card > p {
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.solution-features {
  list-style: none;
  padding: 0;
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.solution-features li {
  color: var(--text-muted);
  padding: 8px 0;
  font-size: 0.9375rem;
  padding-left: 20px;
  position: relative;
}

.solution-features li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text);
}

/* Expertise */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.expertise-card {
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color .2s;
}

.expertise-card:hover {
  border-color: var(--text);
}

.expertise-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.expertise-card p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* Approach */
.section-approach {
  background: #fafafa;
}

.approach-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.approach-step {
  display: flex;
  gap: 20px;
}

.step-number {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.step-content p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* Why */
.section-why {
  background: #fafafa;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.why-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.why-item p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* Contact */
.section-contact {
  border-top: 1px solid var(--border);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-method {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.method-label {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

.method-value {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
}

.method-value:hover {
  text-decoration: underline;
}

/* Form */
.contact-form {
  padding: 48px;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.form-group {
  margin-bottom: 24px;
}

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

.contact-form label {
  font-weight: 500;
  font-size: 0.9375rem;
  display: block;
  margin-bottom: 8px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color .2s;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--text);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  margin-top: 16px;
  padding: 12px;
  border-radius: 8px;
  text-align: center;
  font-size: 0.9375rem;
}

.form-status-success {
  background: #f0fdf4;
  color: #15803d;
}

.form-status-error {
  background: #fef2f2;
  color: #dc2626;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color .2s;
}

.footer-links a:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 1024px) {
  .lab-features,
  .solution-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .expertise-grid,
  .approach-steps,
  .why-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }
  
  .nav-links a:not(.btn):not(.lang-switcher) {
    display: none;
  }
  
  .section {
    padding: 64px 0;
  }
  
  .hero {
    padding: 100px 0 64px;
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .contact-form {
    padding: 32px 24px;
  }
}