:root {
  --ink: #10192B;
  --ink-soft: #223349;
  --paper: #F5F2EA;
  --paper-raised: #EDE8DA;
  --line: #3E6690;
  --line-soft: rgba(62, 102, 144, 0.28);
  --safety: #B85A24;
  --safety-soft: #F1DFC9;
  --graphite: #5B6472;
  --hairline: rgba(16, 25, 43, 0.14);
  --paper-rgb: 245, 242, 234;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #EDEBE3;
    --ink-soft: #C7CCD6;
    --paper: #0D1520;
    --paper-raised: #16202E;
    --line: #7FAAD1;
    --line-soft: rgba(127, 170, 209, 0.28);
    --safety: #E08D51;
    --safety-soft: #2A2015;
    --graphite: #93A0AF;
    --hairline: rgba(237, 235, 227, 0.14);
    --paper-rgb: 13, 21, 32;
  }
}

:root[data-theme="dark"] {
  --ink: #EDEBE3;
  --ink-soft: #C7CCD6;
  --paper: #0D1520;
  --paper-raised: #16202E;
  --line: #7FAAD1;
  --line-soft: rgba(127, 170, 209, 0.28);
  --safety: #E08D51;
  --safety-soft: #2A2015;
  --graphite: #93A0AF;
  --hairline: rgba(237, 235, 227, 0.14);
  --paper-rgb: 13, 21, 32;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
}

a { color: inherit; }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding-inline: 24px;
}

h1, h2, h3 {
  text-wrap: balance;
  font-weight: 900;
  letter-spacing: 0.01em;
}

p { color: var(--graphite); }

.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--line);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--line);
  display: inline-block;
}

/* ============ HEADER ============ */
header.site {
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  background: rgba(var(--paper-rgb), 0.92);
  backdrop-filter: blur(10px);
  z-index: 50;
}
.site-inner {
  width: 100%;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-weight: 900;
  font-size: 17px;
}
.brand .tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--graphite);
  letter-spacing: 0.04em;
}
nav.site-nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
  font-weight: 500;
}
nav.site-nav a { color: var(--graphite); text-decoration: none; }
nav.site-nav a:hover { color: var(--line); }
@media (max-width: 560px) {
  nav.site-nav { display: none; }
}

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 64px 0 56px;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 85%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 85%);
  pointer-events: none;
  animation: hero-grid-drift 26s linear infinite;
}

@keyframes hero-grid-drift {
  from { background-position: 0 0; }
  to { background-position: 34px 34px; }
}

.schematic .poc-outline {
  stroke-dasharray: 3 7;
  animation: poc-sketch-march 1.6s linear infinite;
}

@keyframes poc-sketch-march {
  to { stroke-dashoffset: -20; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-grid { animation: none; }
  .schematic .poc-outline { animation: none; }
}
.hero .wrap { position: relative; }

.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  margin: 18px 0 20px;
}
.hero p.lede {
  font-size: 16.5px;
  max-width: 34em;
  margin-bottom: 20px;
}

.growth-line {
  font-size: 17px;
  font-weight: 700;
  color: var(--line);
  margin-bottom: 32px;
}
.growth-line .mono { font-weight: 700; }

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  font-weight: 700;
  font-size: 15px;
  border-radius: 3px;
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 20px var(--line-soft); }
.btn-ghost {
  border-color: var(--hairline);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--line); }

/* schematic diagram */
.schematic {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
}
.schematic .cap {
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  color: var(--graphite);
  text-align: center;
  margin-top: 10px;
  letter-spacing: 0.03em;
}
.schematic svg { width: 100%; height: auto; display: block; }
@media (max-width: 560px) {
  .schematic { grid-template-columns: 1fr; }
  .schematic .arrow { transform: rotate(90deg); width: 32px; margin: 0 auto; }
}

/* ============ SECTIONS ============ */
section { padding: 68px 0; border-bottom: 1px solid var(--hairline); }
section:last-of-type { border-bottom: none; }
section.compact { padding: 32px 0; }
section h2 {
  font-size: clamp(22px, 3.4vw, 27px);
  margin: 14px 0 30px;
  max-width: 20em;
}

/* risk checklist */
.checklist { display: flex; flex-direction: column; }
.check-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline);
}
.check-row:last-child { border-bottom: 1px solid var(--hairline); }
.check-id {
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  color: var(--safety);
  font-weight: 700;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding-top: 2px;
}
.check-id .box {
  width: 13px;
  height: 13px;
  border: 1.6px solid var(--safety);
  border-radius: 2px;
  flex: none;
  margin-top: 2px;
}
.check-row p { margin: 0; color: var(--ink-soft); font-size: 15.5px; }

/* process steps */
.steps { display: flex; flex-direction: column; }
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-top: 1px solid var(--hairline);
}
.step:last-child { border-bottom: 1px solid var(--hairline); }
.step .num {
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  font-size: 22px;
  color: var(--line);
}
.step h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; }
.step p { margin: 0; font-size: 15px; }

/* direct-pricing band */
.direct {
  background: var(--paper-raised);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.direct-diagram {
  margin-top: 30px;
  display: grid;
  gap: 14px;
}
.flow-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-family: "JetBrains Mono", monospace; font-size: 13px; }
.flow-node {
  padding: 7px 13px;
  border: 1.4px solid var(--hairline);
  border-radius: 3px;
  background: var(--paper);
}
.flow-node.you { border-color: var(--line); color: var(--line); font-weight: 700; }
.flow-arrow { color: var(--graphite); }
.flow-row.no { color: var(--graphite); }
.flow-row.no .flow-node { opacity: 0.55; }
.flow-label { font-size: 11.5px; color: var(--graphite); width: 84px; flex: none; text-transform: uppercase; letter-spacing: 0.06em; }

/* profile */
.author-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 22px;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  max-width: 56em;
}
.author-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--line);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.author-bio { margin: 0; color: var(--ink-soft); font-size: 14.5px; line-height: 1.75; }

/* credentials */
.cred-list { display: flex; flex-direction: column; margin-top: 8px; }
.cred-row {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--hairline);
  align-items: start;
}
.cred-row:last-child { border-bottom: 1px solid var(--hairline); }
.cred-row svg { width: 20px; height: 20px; color: var(--line); margin-top: 3px; flex: none; }
.cred-row p { margin: 0; color: var(--ink-soft); font-size: 15.5px; }

.note {
  font-size: 13.5px;
  color: var(--graphite);
  font-style: normal;
  margin-top: 6px;
}

/* tech stack */
.stack-list { margin-top: 36px; }
.stack-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  display: block;
  margin-bottom: 12px;
}
.stack-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.stack-note { margin-top: 14px; }
.stack-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  padding: 6px 12px;
  border: 1.4px solid var(--hairline);
  border-radius: 3px;
  color: var(--ink-soft);
}

/* FAQ */
.faq-item { border-top: 1px solid var(--hairline); }
.faq-item:last-child { border-bottom: 1px solid var(--hairline); }
.faq-item summary {
  padding: 18px 0;
  cursor: pointer;
  font-weight: 700;
  font-size: 15.5px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: "JetBrains Mono", monospace;
  color: var(--line);
  font-weight: 400;
  flex: none;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item .a { margin: 0 0 22px; color: var(--graphite); font-size: 15px; max-width: 38em; }

/* final CTA */
.final {
  background: var(--ink);
  color: var(--paper);
}
.final .eyebrow { color: var(--safety); }
.final .eyebrow::before { background: var(--safety); }
.final h2 { color: var(--paper); }
.final p { color: rgba(var(--paper-rgb), 0.72); max-width: 34em; }
.final .btn-primary { background: var(--paper); color: var(--ink); }
.final .btn-ghost { border-color: rgba(var(--paper-rgb), 0.3); color: var(--paper); }

/* contact form */
.contact-form {
  margin-top: 34px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 480px;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(var(--paper-rgb), 0.65);
}
.field input,
.field textarea {
  font-family: inherit;
  font-size: 15px;
  padding: 11px 13px;
  border-radius: 3px;
  border: 1.4px solid rgba(var(--paper-rgb), 0.28);
  background: rgba(var(--paper-rgb), 0.06);
  color: var(--paper);
  resize: vertical;
}
.field input::placeholder,
.field textarea::placeholder { color: rgba(var(--paper-rgb), 0.4); }
.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--safety);
  outline-offset: 1px;
}
.contact-form .btn { align-self: flex-start; }
.contact-form .btn:disabled { opacity: 0.6; cursor: not-allowed; }
.form-status { font-size: 13.5px; margin: 0; min-height: 1.4em; }
.form-status.is-success { color: #8FCB9A; }
.form-status.is-error { color: #E4A08A; }

.mail-alt {
  margin-top: 22px;
  font-size: 13.5px;
  color: rgba(var(--paper-rgb), 0.6);
}
.mail-alt a { color: var(--paper); font-weight: 700; text-decoration: underline !important; }

/* form result modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 200;
}
.modal-overlay[hidden] { display: none; }
.modal-box {
  background: var(--paper);
  color: var(--ink);
  border-radius: 6px;
  padding: 34px 28px;
  max-width: 380px;
  width: 100%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
  text-align: center;
}
.modal-icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
}
.modal-icon svg { width: 22px; height: 22px; }
.modal-box.is-success .modal-icon-success { display: flex; background: var(--line-soft); color: var(--line); }
.modal-box.is-error .modal-icon-error { display: flex; background: var(--safety-soft); color: var(--safety); }
.modal-title { font-size: 18px; font-weight: 900; margin: 0 0 8px; color: var(--ink); }
.modal-message { font-size: 14.5px; color: var(--graphite); margin: 0 0 24px; }
.modal-close { width: 100%; justify-content: center; }

footer {
  padding: 32px 0;
  text-align: center;
  font-size: 12.5px;
  color: var(--graphite);
}

@media (max-width: 480px) {
  .wrap, .site-inner { width: 100%; }
}