:root {
  --ark-bg: #f5f7fa;
  --ark-panel: #ffffff;
  --ark-border: #e5e7eb;
  --ark-text: #0f172a;
  --ark-muted: #6b7280;
  --ark-gradient: linear-gradient(135deg, #6a7bff, #a855f7, #38bdf8);
  --ark-primary: #4f46e5;
  --ark-primary-hover: #4338ca;
  --ark-success-bg: #ecfdf3;
  --ark-success-border: #a7f3d0;
  --ark-success-text: #166534;
  --ark-error-bg: #fef2f2;
  --ark-error-border: #fecaca;
  --ark-error-text: #991b1b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--ark-bg);
  color: var(--ark-text);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1200px, 90%);
  margin: auto;
}

header {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: 40px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: inherit;
}

.logo-img {
  height: 24px;
  width: auto;
}

.sys-nav {
  display: flex;
  gap: 24px;
}

.sys-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--ark-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.sys-nav a:hover {
  color: var(--ark-text);
}

.eyebrow {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ark-primary);
  margin-bottom: 20px;
}

.btn {
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--ark-primary);
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-block;
  text-decoration: none;
  border: 0;
  font: inherit;
}

.btn:hover {
  background: var(--ark-primary-hover);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.22);
  transform: translateY(-1px);
}

.btn.secondary {
  background: #ffffff;
  color: var(--ark-text);
  border: 1px solid var(--ark-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.btn.secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.hero,
.contact-hero {
  padding: 100px 0 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
}

.hero:before,
.contact-hero:before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(106, 123, 255, 0.06), transparent 40%),
              radial-gradient(circle at 80% 60%, rgba(56, 189, 248, 0.06), transparent 40%);
  pointer-events: none;
}

h1 {
  font-size: 64px;
  line-height: 1.05;
  margin: 0;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.gradient {
  background: var(--ark-gradient);
  -webkit-background-clip: text;
  color: transparent;
}

.hero p,
.contact-hero p {
  color: var(--ark-muted);
  font-size: 18px;
  max-width: 560px;
  line-height: 1.6;
  margin-top: 24px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  max-width: 580px;
}

.hero-proof span {
  background: rgba(79, 70, 229, 0.08);
  color: var(--ark-text);
  border: 1px solid rgba(79, 70, 229, 0.12);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
}

.hero .actions,
.contact-actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.section {
  padding: 80px 0;
}

.label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ark-muted);
  margin-bottom: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h2 {
  font-size: 40px;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 48px;
}

.about-heading {
  max-width: 24ch;
}

h3 {
  margin-top: 0;
}

.grid,
.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card,
.proof-card,
.info-card,
.contact-side-card,
.lead-form {
  padding: 32px;
  border-radius: 12px;
  background: var(--ark-panel);
  border: 1px solid var(--ark-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.card h3,
.proof-card h3 {
  font-size: 20px;
  letter-spacing: -0.01em;
}

.card span,
.proof-card p,
.info-card span,
.contact-copy,
.form-note {
  color: var(--ark-muted);
  line-height: 1.6;
}

.why-grid,
.panel-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.why {
  padding: 32px;
  border: 1px solid var(--ark-border);
  border-radius: 12px;
  background: var(--ark-panel);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.why b,
.info-card b {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.why span {
  color: var(--ark-muted);
  line-height: 1.55;
}

.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.7fr);
  gap: 36px;
  align-items: start;
}

.info-card {
  padding: 24px 28px;
}

.info-card span {
  display: block;
  font-size: 17px;
}

.panel-copy p {
  font-size: 18px;
  max-width: 44ch;
  line-height: 1.7;
  color: var(--ark-muted);
  margin: 0 0 20px;
}

.proof-card small {
  color: var(--ark-muted);
  display: block;
  margin-bottom: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: 11px;
}

.proof-card p {
  margin: 0 0 16px;
}

.proof-card p:last-child {
  margin-bottom: 0;
}

.contact-section {
  border-top: 1px solid var(--ark-border);
  margin-top: 20px;
}

.contact-copy {
  max-width: 720px;
  font-size: 18px;
  line-height: 1.7;
  margin-top: -16px;
}

.contact-page {
  padding-bottom: 80px;
}

.contact-side-card h2 {
  font-size: 28px;
  margin-bottom: 20px;
}

.contact-hints,
.error-list {
  margin: 0;
  padding-left: 20px;
  color: var(--ark-muted);
  line-height: 1.7;
}

.contact-form-section {
  padding-top: 10px;
}

.form-feedback {
  margin-bottom: 24px;
  padding: 20px 24px;
  border-radius: 12px;
  border: 1px solid;
  display: grid;
  gap: 8px;
}

.form-feedback.success {
  background: var(--ark-success-bg);
  border-color: var(--ark-success-border);
  color: var(--ark-success-text);
}

.form-feedback.error {
  background: var(--ark-error-bg);
  border-color: var(--ark-error-border);
  color: var(--ark-error-text);
}

.lead-form {
  display: grid;
  gap: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.lead-form label {
  display: grid;
  gap: 8px;
  font-weight: 600;
}

.lead-form span {
  font-size: 14px;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  border: 1px solid var(--ark-border);
  border-radius: 10px;
  padding: 14px 16px;
  font: inherit;
  color: var(--ark-text);
  background: #ffffff;
}

.lead-form textarea {
  resize: vertical;
  min-height: 180px;
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  outline: 2px solid rgba(79, 70, 229, 0.18);
  border-color: var(--ark-primary);
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-actions {
  display: grid;
  gap: 14px;
}

.form-button {
  justify-self: start;
}

.legal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 40px 0;
  border-top: 1px solid var(--ark-border);
  margin-top: 60px;
  color: var(--ark-muted);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
}

.footer-left {
  line-height: 1.6;
}

.footer-tagline {
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.8;
}

.footer-right {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-right a {
  color: var(--ark-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.legal-doc {
  padding: 60px 0;
  max-width: 800px;
  margin: 0 auto;
}

.legal-doc h1 {
  font-size: 40px;
  margin-bottom: 40px;
}

.legal-content h2 {
  font-size: 24px;
  margin-top: 40px;
  margin-bottom: 16px;
  font-weight: 700;
  border-bottom: 1px solid var(--ark-border);
  padding-bottom: 8px;
}

.legal-content p {
  color: var(--ark-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  font-size: 16px;
}

.legal-content a {
  color: var(--ark-primary);
  text-decoration: none;
}

@media (max-width: 1000px) {
  .split-panel,
  .proof-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .hero,
  .contact-hero,
  .grid,
  .why-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 48px;
  }

  .system-visual {
    margin-top: 40px;
  }
}

@media (max-width: 600px) {
  header {
    flex-wrap: wrap;
    gap: 20px;
  }

  .brand-cluster {
    gap: 20px;
    flex-wrap: wrap;
  }

  .sys-nav {
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero .actions,
  .contact-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-proof {
    gap: 8px;
  }

  .form-button {
    justify-self: stretch;
  }

  .legal-footer {
    flex-direction: column;
    gap: 32px;
    align-items: flex-start;
  }

  .footer-right {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

.system-visual {
  position: relative;
  height: 420px;
  border-radius: 16px;
  border: 1px solid var(--ark-border);
  background:
    radial-gradient(circle at 18% 24%, rgba(106, 123, 255, 0.08), transparent 28%),
    radial-gradient(circle at 82% 72%, rgba(56, 189, 248, 0.08), transparent 30%),
    linear-gradient(180deg, #ffffff, #f8fafc);
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.04);
}

.system-visual:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at center, black, transparent 80%);
  pointer-events: none;
}

.flow {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(79, 70, 229, 0.2);
  animation: drift 8s ease-in-out infinite alternate;
}

.f1 { width: 180px; height: 180px; top: 32px; left: 80px; }
.f2 { width: 220px; height: 220px; bottom: 24px; right: 64px; animation-delay: -2s; }

.node {
  position: absolute;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--ark-border);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.04);
  letter-spacing: 0.02em;
  line-height: 1.3;
  z-index: 2;
}

.node small {
  display: block;
  margin-top: 4px;
  color: var(--ark-muted);
  font-size: 10px;
  letter-spacing: 0.1em;
  font-weight: 500;
  text-transform: uppercase;
}

.core {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--ark-gradient);
  color: white;
  border: none;
  font-weight: 800;
  padding: 14px 18px;
  animation: pulseCore 3s ease-in-out infinite;
  box-shadow: 0 12px 24px rgba(106, 123, 255, 0.2);
}

.core small {
  color: rgba(255, 255, 255, 0.8);
}

.n1 { top: 50px; left: 50px; }
.n2 { top: 76px; right: 60px; }
.n3 { bottom: 60px; left: 96px; }
.n4 { bottom: 90px; right: 40px; }
.n5 { top: 190px; left: 24px; }

.line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, #6a7bff, #38bdf8, transparent);
  opacity: 0.5;
  transform-origin: left center;
  z-index: 1;
}

.line:after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 32px;
  height: 6px;
  border-radius: 8px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.9));
  animation: signal 3s ease-in-out infinite;
}

.l1 { width: 200px; top: 100px; left: 130px; transform: rotate(26deg); }
.l2 { width: 170px; top: 125px; right: 135px; transform: rotate(148deg); }
.l3 { width: 205px; bottom: 125px; left: 170px; transform: rotate(-22deg); }
.l4 { width: 170px; bottom: 145px; right: 125px; transform: rotate(-152deg); }
.l5 { width: 150px; top: 220px; left: 115px; transform: rotate(-8deg); opacity: 0.3; }

.status-pill {
  position: absolute;
  top: 24px;
  right: 24px;
  z-index: 3;
  padding: 6px 12px;
  border-radius: 999px;
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  color: #0369a1;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.status-pill:before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
  vertical-align: middle;
}

@keyframes signal {
  0% { transform: translateX(0); opacity: 0; }
  20% { opacity: 1; }
  100% { transform: translateX(150px); opacity: 0; }
}

@keyframes pulseCore {
  0%, 100% { box-shadow: 0 12px 24px rgba(79, 70, 229, 0.15); }
  50% { box-shadow: 0 16px 32px rgba(56, 189, 248, 0.25); }
}

@keyframes drift {
  from { transform: translateY(0) scale(1); }
  to { transform: translateY(-6px) scale(1.02); }
}