:root {
  --base: #0f172a;
  --surface: #1e293b;
  --surface-high: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-micro: #475569;
  --accent: #0ea5e9;
  --accent-dim: rgba(14, 165, 233, 0.12);
  --accent-border: rgba(14, 165, 233, 0.22);
  --border: rgba(148, 163, 184, 0.10);
  --border-mid: rgba(148, 163, 184, 0.14);
  --font: -apple-system, 'Inter', BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 5px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-pill: 100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--base);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
  line-height: 1.6;
}

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

/* ── NAV ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 64px;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.15s;
}

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

.nav-cta {
  font-size: 12px;
  font-weight: 500;
  padding: 8px 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
}

.nav-cta:hover { opacity: 0.88; }

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all 0.2s;
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--base);
  border-bottom: 1px solid var(--border);
  padding: 20px 48px;
  z-index: 99;
}

.nav-mobile.open { display: block; }

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nav-mobile ul a {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ── HERO ── */
.hero {
  position: relative;
  padding: 148px 48px 100px;
  overflow: hidden;
  min-height: 640px;
}

.hero-trace {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.14;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  padding: 5px 14px;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
}

.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.hero-eyebrow span {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.09em;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  max-width: 580px;
  margin-bottom: 18px;
  text-wrap: balance;
}

.hero h1 .accent { color: var(--accent); }

.hero-sub {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  font-size: 13px;
  font-weight: 500;
  padding: 10px 22px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s;
  text-decoration: none;
  display: inline-block;
  transform: scale(1);
}

.btn-primary:active { transform: scale(0.97); }
.btn-primary:hover { opacity: 0.88; }

.btn-ghost {
  font-size: 13px;
  padding: 10px 22px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  text-decoration: none;
  display: inline-block;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: rgba(148, 163, 184, 0.3);
}

/* ── WHAT WE DO ── */
.what-we-do {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border);
}

.wwd-col {
  padding: 32px 40px;
  border-right: 1px solid var(--border);
}

.wwd-col:last-child { border-right: none; }

.wwd-label {
  font-size: 9px;
  letter-spacing: 0.10em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.wwd-col h3 {
  font-size: 14px;
  font-weight: 500;
  color: #e2e8f0;
  margin-bottom: 8px;
}

.wwd-col p {
  font-size: 12px;
  color: var(--text-micro);
  line-height: 1.65;
}

/* ── SECTION SHARED ── */
section {
  padding: 88px 48px;
}

.section-eyebrow {
  font-size: 9px;
  letter-spacing: 0.10em;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-heading {
  font-size: clamp(26px, 3.5vw, 34px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.12;
  text-wrap: balance;
}

.section-sub {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-top: 12px;
}

/* ── SOLUTIONS ── */
#solutions {
  background: var(--surface);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 52px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.solution-card {
  background: var(--surface);
  padding: 36px 32px;
}

.solution-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.solution-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.solution-card h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.solution-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
}

.solution-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.tech-chip {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-micro);
  border-radius: 4px;
}

/* ── PROJECTS ── */
#projects {
  background: var(--base);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 52px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  transition: border-color 0.2s;
}

.project-card:hover { border-color: rgba(148, 163, 184, 0.22); }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tag-sector {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  background: var(--accent-dim);
  color: #38bdf8;
  border-radius: 4px;
  text-transform: uppercase;
}

.tag-tech {
  font-size: 9px;
  font-weight: 500;
  padding: 4px 9px;
  background: rgba(148, 163, 184, 0.07);
  color: var(--text-micro);
  border-radius: 4px;
}

.project-card h3 {
  font-size: 14px;
  font-weight: 500;
  color: #e2e8f0;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.project-card p {
  font-size: 12px;
  color: var(--text-micro);
  line-height: 1.65;
}

/* ── WHY / DIFFERENTIATORS ── */
#about {
  background: var(--surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 52px;
  align-items: start;
}

.about-left h2 {
  font-size: clamp(26px, 3.5vw, 34px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 16px;
  text-wrap: balance;
}

.about-left p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}

.founder-block {
  margin-top: 32px;
  padding: 20px 22px;
  background: var(--base);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.founder-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.founder-title {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.founder-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.credential-chip {
  font-size: 9px;
  font-weight: 500;
  padding: 3px 9px;
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-micro);
  border-radius: 4px;
}

.differentiators {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.diff-item {
  display: flex;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}

.diff-item:first-child { border-top: 1px solid var(--border); }

.diff-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  min-width: 24px;
  padding-top: 1px;
}

.diff-content h4 {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 5px;
}

.diff-content p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── CONTACT ── */
#contact {
  background: var(--base);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 52px;
  align-items: start;
}

.contact-info h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.contact-info p, .contact-info address {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  font-style: normal;
  margin-bottom: 24px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.contact-detail-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.contact-detail-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--text-micro);
  text-transform: uppercase;
  min-width: 68px;
  padding-top: 2px;
}

.contact-detail-value {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.contact-detail-value a {
  color: var(--accent);
  transition: opacity 0.15s;
}

.contact-detail-value a:hover { opacity: 0.8; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-micro);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: rgba(14, 165, 233, 0.5);
}

.form-field select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.form-field textarea { resize: vertical; min-height: 100px; }

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

.form-submit {
  margin-top: 4px;
}

/* ── FOOTER ── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-logo {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.footer-logo span { color: var(--accent); }

.footer-meta {
  font-size: 11px;
  color: var(--text-micro);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 11px;
  color: var(--text-micro);
  transition: color 0.15s;
}

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

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav { padding: 0 24px; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }

  .hero { padding: 108px 24px 72px; }

  .what-we-do { grid-template-columns: 1fr; }
  .wwd-col { border-right: none; border-bottom: 1px solid var(--border); }
  .wwd-col:last-child { border-bottom: none; }

  section { padding: 64px 24px; }

  .solutions-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }

  footer { padding: 24px; flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .solutions-grid { border-radius: var(--radius); }
}