:root {
  --paper: #f3f0e7;
  --paper-alt: #eae6d9;
  --ink: #15222c;
  --ink-soft: #47555d;
  --line: #2f6690;
  --line-dark: #234e6e;
  --line-bright: #6fa8d6;
  --hairline: #8f7f5b;
  --hairline-dark: rgba(236, 231, 216, 0.22);
  --paper-on-dark: #ece7d8;

  --font-display: "IBM Plex Sans", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; }

a { color: var(--line-dark); }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.kicker {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--line-dark);
  margin: 0 0 14px;
}

.kicker-on-dark { color: var(--line-bright); }

/* Registration ticks */
.tick-frame { position: relative; }

.tick {
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.tick-tl { top: -1px; left: -1px; border-top: 1.5px solid var(--line); border-left: 1.5px solid var(--line); }
.tick-tr { top: -1px; right: -1px; border-top: 1.5px solid var(--line); border-right: 1.5px solid var(--line); }
.tick-bl { bottom: -1px; left: -1px; border-bottom: 1.5px solid var(--line); border-left: 1.5px solid var(--line); }
.tick-br { bottom: -1px; right: -1px; border-bottom: 1.5px solid var(--line); border-right: 1.5px solid var(--line); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 240, 231, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--hairline);
}

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

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand span { color: var(--line-dark); }

.crest-mark {
  color: var(--line);
  vertical-align: -5px;
  margin-right: 8px;
}

.footer-brand {
  display: flex;
  align-items: center;
}

.footer-brand .crest-mark { color: var(--paper-on-dark); opacity: 0.7; margin-right: 6px; vertical-align: -3px; }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav a:hover { color: var(--line-dark); }

.nav-cta {
  background: var(--line);
  color: var(--paper) !important;
  padding: 8px 16px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.8rem !important;
  letter-spacing: 0.04em;
}

.nav-cta:hover { background: var(--line-dark); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  display: block;
}

/* Hero */
.hero {
  padding: 88px 0 96px;
  background-image:
    linear-gradient(rgba(47, 102, 144, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 102, 144, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

.kicker-rule {
  display: block;
  width: 40px;
  height: 2px;
  background: var(--line);
  margin: 0 0 18px;
}

.hero-copy h1 {
  font-size: clamp(2.15rem, 3.8vw, 3rem);
  max-width: 17ch;
}

.hero-sub {
  max-width: 50ch;
  font-size: 1.05rem;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.hero-diagram-wrap {
  padding: 20px;
  border: 1px solid var(--hairline);
  background: rgba(255, 255, 255, 0.35);
}

.hero-diagram { width: 100%; height: auto; display: block; }

.diagram-line {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .diagram-line {
    stroke-dashoffset: 1;
    animation: draw-line 0.9s ease-out 0.3s forwards;
  }

  .diagram-line:nth-of-type(2) { animation-delay: 0.75s; }
}

@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

.node rect {
  fill: none;
  stroke: var(--ink-soft);
  stroke-width: 1.25;
}

.node-b rect { fill: var(--ink); stroke: var(--line); }

.node-label {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--ink);
  text-anchor: middle;
}

.node-tag {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  fill: var(--ink-soft);
  text-anchor: middle;
}

.node-label-strong { fill: var(--paper-on-dark); font-weight: 600; }
.node-tag-strong { fill: var(--line-bright); }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 2px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--line);
  color: var(--paper);
}

.btn-primary:hover { background: var(--line-dark); }

.btn:disabled {
  background: var(--hairline);
  color: var(--ink-soft);
  cursor: not-allowed;
}

.btn:disabled:hover { background: var(--hairline); }

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

/* Sections */
.section { padding: 80px 0; }

.section-alt { background: var(--paper-alt); }

.section h2 { font-size: clamp(1.5rem, 3vw, 2rem); }

.section-sub {
  color: var(--ink-soft);
  max-width: 56ch;
  margin-bottom: 40px;
}

/* Services spec list */
.spec-list { border-top: 1px solid var(--hairline); }

.spec-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--hairline);
}

.spec-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--line-dark);
  padding-top: 3px;
}

.spec-body h3 { font-size: 1.05rem; margin-bottom: 8px; }

.spec-body p { color: var(--ink-soft); font-size: 0.95rem; margin: 0; max-width: 60ch; }

/* Work / print section */
.section-print {
  background: var(--ink);
  color: var(--paper-on-dark);
  background-image:
    linear-gradient(rgba(236, 231, 216, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(236, 231, 216, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.section-print h2.on-dark { color: var(--paper-on-dark); }

.case-study {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  border: 1px solid var(--hairline-dark);
  padding: 32px;
  flex-wrap: wrap;
}

.case-logo {
  flex: 0 0 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  background: var(--paper);
  padding: 16px;
}

.case-logo img { max-width: 100%; height: auto; }

.logo-fallback-text { display: none; }

.case-logo.logo-fallback .logo-fallback-text {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  text-align: center;
  color: var(--ink-soft);
}

.case-content { flex: 1 1 320px; }

.case-content h3 { margin-bottom: 12px; color: var(--paper-on-dark); }

.case-content p { color: var(--paper-on-dark); opacity: 0.85; }

.case-content ul {
  padding-left: 20px;
  color: var(--paper-on-dark);
  opacity: 0.85;
}

.case-content li { margin-bottom: 6px; }

.case-quote {
  margin: 24px 0 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--line);
}

.case-quote p {
  font-style: italic;
  color: var(--paper-on-dark);
  opacity: 0.95;
  margin: 0 0 8px;
}

.case-quote cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--line-bright);
}

/* About */
.about-section { position: relative; overflow: hidden; }

.crest-watermark {
  position: absolute;
  top: 50%;
  right: -40px;
  transform: translateY(-50%);
  width: 260px;
  height: auto;
  color: var(--ink);
  opacity: 0.05;
  pointer-events: none;
}

.about-wrap {
  position: relative;
  z-index: 1;
}

.about-wrap p {
  max-width: 68ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* Contact */
.contact-wrap { max-width: 640px; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 8px 4px 4px;
}

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

.form-row label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.form-row input,
.form-row textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 10px 2px;
  border: none;
  border-bottom: 1.5px solid var(--hairline);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--line);
  outline-offset: 2px;
  border-bottom-color: var(--line);
}

.contact-form .btn { align-self: flex-start; margin-top: 4px; }

.form-status {
  font-size: 0.9rem;
  color: var(--ink-soft);
  min-height: 1.2em;
}

/* Capabilities page */
.cap-hero { padding-top: 64px; padding-bottom: 48px; }

/* 404 page */
.not-found { padding-top: 120px; padding-bottom: 140px; }
.not-found h1 { max-width: 18ch; }

.demo-panel {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--hairline);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.demo-controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.demo-controls .form-row select,
.demo-controls .form-row input {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 10px 2px;
  border: none;
  border-bottom: 1.5px solid var(--hairline);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
}

.demo-controls .form-row select:focus,
.demo-controls .form-row input:focus {
  outline: 2px solid var(--line);
  outline-offset: 2px;
  border-bottom-color: var(--line);
}

.demo-controls .form-row label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-soft);
}

input[type="range"] { accent-color: var(--line); width: 100%; }

.demo-controls .btn { align-self: flex-start; }

.demo-output {
  border: 1px solid var(--hairline);
  padding: 24px;
  background: var(--paper);
  min-height: 100px;
}

.demo-output-tier {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--line-dark);
  margin: 0 0 8px;
}

.demo-output-detail { margin: 0; color: var(--ink-soft); }

.demo-ticket p { font-family: var(--font-mono); font-size: 0.9rem; margin: 0 0 8px; }

.ticket-label {
  display: inline-block;
  width: 70px;
  color: var(--ink-soft);
}

.demo-note-strong {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--line-dark);
  margin-bottom: 12px !important;
}

.demo-note {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 16px;
}

.field-feedback {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  min-height: 1.2em;
  display: block;
}

.field-feedback-ok { color: #2b7a4b; }
.field-feedback-bad { color: #ab3a2a; }

.btn-ghost-on-dark {
  border-color: var(--paper-on-dark);
  color: var(--paper-on-dark);
}

.btn-ghost-on-dark:hover {
  background: var(--paper-on-dark);
  color: var(--ink);
}

.cap-cta .hero-actions { margin-top: 24px; }

@media (max-width: 760px) {
  .demo-panel { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: var(--paper-on-dark);
  padding: 36px 0;
}

.footer-inner {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  opacity: 0.85;
}

.footer-inner p { margin: 0; }

.footer-inner a { color: var(--paper-on-dark); }

/* Responsive */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 16px;
    display: none;
  }

  .nav.open { display: flex; }

  .nav-toggle { display: flex; }

  .case-study { flex-direction: column; }

  .spec-row { grid-template-columns: 1fr; gap: 8px; }
}