:root {
  --ink: #12233d;
  --ink-soft: #41536e;
  --ink-mute: #8c9bb0;
  --ink-faint: #7c8ea6;
  --accent: #2E7FC4;
  --border: #e2e7ee;
  --border-strong: #cfd8e3;
  --border-card: #dbe3ec;
  --bg: #fbfcfd;
  --bg-alt: #f2f5f8;
  --dark: #12233d;
  --dark-card: #16294a;
  --dark-border: #2b3e5c;
  --dark-text: #bacadd;
  --dark-text-soft: #cbd7e6;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.025em; margin: 0 0 16px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 20px;
}

.lead {
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.section-lead {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 680px;
  margin: 0 0 40px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
}

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

.btn-outline { border-color: var(--border-strong); color: var(--ink); background: transparent; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-block { width: 100%; text-align: center; padding: 14px; font-size: 16px; }
.btn-block.btn-primary { background: var(--accent); }
.btn-block.btn-primary:hover { background: var(--ink); }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { height: 30px; width: auto; }
.brand-name { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; }
.brand-suffix { color: var(--ink-faint); font-weight: 400; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 15px;
  color: var(--ink-soft);
}

.lang-switch {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.lang-opt.active { color: var(--ink); font-weight: 500; }

/* Hero */
.hero { padding: 72px 0; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.cta-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }

h1 { font-size: 52px; line-height: 1.08; max-width: 680px; }

.stat-card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.stat-card hr { border: none; height: 1px; background: var(--border); margin: 0; }

.stat-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 7px;
}

.stat-value { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin: 0; }
.stat-value-sm { font-size: 17px; font-weight: 500; line-height: 1.45; }
.stat-note { font-size: 14.5px; color: var(--ink-soft); margin: 5px 0 0; }

/* Diagram */
.diagram {
  padding: 64px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.diagram h2 { font-size: 30px; }

.diagram-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.diagram-steps li {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 5px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.diagram-steps li.step-highlight {
  background: var(--dark);
  border-color: var(--dark);
  color: var(--bg);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}
.step-highlight .step-num { color: #7fb2e0; }

.step-title { font-size: 16px; font-weight: 600; }

.step-desc { font-size: 13.5px; line-height: 1.45; color: var(--ink-soft); }
.step-highlight .step-desc { color: var(--dark-text); }

/* MCP */
.mcp { padding: 72px 0; }

.mcp-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
}

.mcp h2 { font-size: 32px; line-height: 1.14; }

.code-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.code-panel-title {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}

.diagram-steps + .diagram-steps {
  margin-top: 2.5rem; /* zwiększ/zmniejsz wg uznania */
}

.code-panel-body {
  margin: 0;
  padding: 22px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--ink);
  white-space: pre-wrap;
}

.code-comment { color: var(--ink-mute); }
.code-accent { color: var(--accent); }

/* Benefits */
.benefits {
  padding: 68px 0;
  background: var(--dark);
  color: var(--bg);
}

.benefits h2 { font-size: 32px; }
.benefits .section-lead { color: var(--dark-text); }

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.benefit-card {
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  padding: 28px;
  background: var(--dark-card);
}

.benefit-card h3 { font-size: 20px; font-weight: 600; margin: 0 0 14px; }

.benefit-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--dark-text-soft);
}

/* Open source */
.opensource { padding: 68px 0; }

.opensource-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.opensource h2 { font-size: 28px; }

.spec-list { margin: 0; }

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  padding: 0 0 12px;
  margin-bottom: 14px;
}
.spec-row-last { border-bottom: none; margin-bottom: 0; }

.spec-row dt { font-size: 16px; color: var(--ink-soft); font-weight: 400; }
.spec-row dd { font-size: 16px; font-weight: 600; margin: 0; }

/* Contact */
.contact {
  padding: 68px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.contact h2 { font-size: 32px; }

.contact-details {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 2;
  margin: 0;
}

.contact-form {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 6px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

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

.field label {
  font-size: 13px;
  color: var(--ink-soft);
}

.field input,
.field textarea {
  border: 1px solid var(--border-card);
  border-radius: 4px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: var(--bg);
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--ink-faint);
  flex-wrap: wrap;
  gap: 12px;
}

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

/* Prevent flex/grid children from refusing to shrink below their content size */
.hero-grid > *,
.mcp-grid > *,
.opensource-grid > *,
.contact-grid > *,
.header-inner > *,
.form-row > *,
.site-nav,
.cta-row { min-width: 0; }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid,
  .mcp-grid,
  .opensource-grid,
  .contact-grid { grid-template-columns: 1fr; }

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

  .benefit-grid { grid-template-columns: 1fr; }

  h1 { font-size: 40px; }

  .site-nav { gap: 18px; font-size: 14px; }
}

@media (max-width: 640px) {
  .header-inner { flex-wrap: wrap; gap: 12px; }
  .site-nav { flex-wrap: wrap; row-gap: 10px; }

  h1 { font-size: 34px; }

  .form-row { grid-template-columns: 1fr; }

  .diagram-steps { grid-template-columns: 1fr; }
}