/* ============================================================
   RIVLET.IO — blueprint editorial
   Deep drafting blue · pale cyan linework · safety-orange accent
   Paper "documents" (case study cards, chat) pinned to the sheet
   ============================================================ */

:root {
  --bg: #0f2440;
  --bg-deep: #0a1a30;
  --card: #142e50;
  --card-edge: rgba(158, 190, 228, 0.28);

  --text: #e9eef6;
  --text-soft: #b9c7da;
  --text-faint: #7f93ae;

  --line: rgba(150, 182, 220, 0.13);
  --line-strong: rgba(150, 182, 220, 0.3);

  --accent: #ff5c1f;
  --accent-deep: #e8501a;

  --paper: #f2eee3;
  --paper-card: #f7f4ec;
  --ink: #1d1a15;
  --ink-soft: #4a443a;
  --ink-faint: #8a8272;
  --ink-line: rgba(29, 26, 21, 0.14);
  --ink-line-strong: rgba(29, 26, 21, 0.32);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Archivo", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;

  --gutter: clamp(1.25rem, 4vw, 4rem);
  --measure: 38rem;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #fff; }

a { color: inherit; }

/* ---------- blueprint ground ---------- */

.grid-ground {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(160, 195, 235, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 195, 235, 0.09) 1px, transparent 1px),
    linear-gradient(rgba(160, 195, 235, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 195, 235, 0.045) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}
/* subtle vignette for depth */
.grid-ground::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% 10%, transparent 55%, rgba(6, 14, 27, 0.55) 100%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

/* ---------- type ---------- */

h1, h2, h3 { font-family: var(--font-display); font-weight: 560; line-height: 1.04; letter-spacing: -0.015em; }

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.mono-label::before {
  content: "";
  width: 2.2em;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

p.lede {
  font-size: clamp(1.15rem, 1.6vw, 1.35rem);
  line-height: 1.55;
  color: var(--text-soft);
  max-width: var(--measure);
}

/* ---------- nav ---------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease;
}
.nav.scrolled {
  background: rgba(10, 24, 43, 0.82);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
}

.wordmark {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  white-space: nowrap;
  flex-shrink: 0;
}
.wordmark .mark {
  width: 1.6em; height: 1.6em;
  color: var(--text);
  flex-shrink: 0;
  display: block;
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.wordmark:hover .mark { transform: rotate(90deg); }

.nav-links { display: flex; gap: clamp(0.9rem, 2vw, 1.8rem); align-items: center; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.nav-links .nav-cta {
  border: 1px solid var(--accent);
  padding: 0.5em 1.1em;
  color: var(--text);
  background: rgba(255, 92, 31, 0.08);
}
.nav-links .nav-cta:hover { background: var(--accent); color: #fff; }

@media (max-width: 1080px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem var(--gutter) 4rem;
  overflow: hidden;
}

.hero-layer { position: absolute; inset: -12% -6%; pointer-events: none; will-change: transform; }
.hero-layer svg { width: 100%; height: 100%; }

.hero-copy { position: relative; z-index: 2; max-width: 62rem; }

.hero h1 {
  font-size: clamp(2.6rem, 7.2vw, 5.6rem);
  margin: 1.1rem 0 1.6rem;
  max-width: 15ch;
  color: var(--paper);
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.hero .lede { margin-bottom: 2.4rem; }

.cta-row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.95em 1.6em;
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: transparent;
  position: relative;
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.btn-ghost:hover { border-color: var(--paper); color: var(--paper); }

.hero-meta {
  margin-top: 4rem;
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.hero-meta .meta-item { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--text-faint); }
.hero-meta .meta-item b { display: block; color: var(--paper); font-size: 0.9rem; margin-bottom: 0.15rem; }

.scroll-hint {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--text-faint);
  animation: hint-bob 2.6s ease-in-out infinite;
}
@keyframes hint-bob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ---------- section scaffolding ---------- */

section { position: relative; padding: clamp(5rem, 12vh, 9rem) var(--gutter); }

.section-inner { max-width: 72rem; margin: 0 auto; position: relative; }

.section-num {
  position: absolute;
  top: -0.5em;
  right: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(6rem, 16vw, 13rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(150, 182, 220, 0.22);
  pointer-events: none;
  will-change: transform;
  z-index: 0;
}

section h2 {
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  margin: 1rem 0 1.4rem;
  max-width: 22ch;
  position: relative;
  z-index: 1;
  color: var(--paper);
}

/* ---------- reveal on scroll ---------- */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.4s; }
.reveal[data-delay="6"] { transition-delay: 0.48s; }

/* ---------- problem section ---------- */

.problem { border-top: 1px solid var(--line); }

.problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}
@media (max-width: 860px) { .problem-grid { grid-template-columns: 1fr; } }

.legacy-stack { position: relative; padding: 1rem 0; }
.legacy-block {
  border: 1px solid var(--card-edge);
  background: var(--card);
  padding: 1.1rem 1.3rem;
  margin-bottom: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--text);
  box-shadow: 4px 4px 0 rgba(4, 10, 20, 0.45);
  will-change: transform;
}
.legacy-block .cost { color: var(--accent); font-weight: 600; text-align: right; }
.legacy-block small { display: block; color: var(--text-faint); letter-spacing: 0.04em; margin-top: 0.2rem; font-size: 0.68rem; }
.legacy-sum {
  border-top: 2px solid var(--line-strong);
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-soft);
}
.legacy-sum b { color: var(--accent); font-size: 1.05rem; }

.problem-copy p { max-width: var(--measure); color: var(--text-soft); margin-bottom: 1.2rem; }
.problem-copy p strong { color: var(--paper); }

.pull-quote {
  border-left: 3px solid var(--accent);
  padding: 0.4rem 0 0.4rem 1.4rem;
  margin: 2rem 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.4;
  color: var(--paper);
  max-width: 34rem;
}
.pull-quote cite {
  display: block;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- pipeline section ---------- */

.pipeline-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.pipeline-track {
  margin: 3.5rem 0 3rem;
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 960px) { .pipeline-track { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .pipeline-track { grid-template-columns: repeat(2, 1fr); } }

.pipe-stage {
  background: var(--bg-deep);
  padding: 1.4rem 1.1rem 1.6rem;
  position: relative;
  transition: background 0.3s ease;
}
.pipe-stage:hover { background: var(--card); }
.pipe-stage .stage-idx {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.pipe-stage h3 { font-size: 1.15rem; margin: 0.55rem 0 0.5rem; color: var(--paper); }
.pipe-stage p { font-size: 0.82rem; line-height: 1.55; color: var(--text-faint); }

.pipe-flowline {
  position: absolute;
  top: 0; left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: flow 3.2s linear infinite;
  z-index: 1;
}
@keyframes flow {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.pipeline-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  max-width: 46rem;
  line-height: 1.8;
}
.pipeline-note b { color: var(--paper); }

/* ---------- case study ---------- */
/* narrative on the blueprint; artifacts are paper documents pinned to it */

.case-header { max-width: 46rem; }
.case .lede { margin-top: 0.4rem; }

.case-layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  margin-top: 3.5rem;
  align-items: start;
}
@media (max-width: 960px) { .case-layout { grid-template-columns: 1fr; } }

.case-narrative h3 {
  font-size: 1.35rem;
  margin: 2.2rem 0 0.8rem;
  color: var(--paper);
}
.case-narrative h3:first-child { margin-top: 0; }
.case-narrative p { color: var(--text-soft); margin-bottom: 1rem; max-width: var(--measure); }
.case-narrative p strong { color: var(--paper); }

.redaction-note {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  border: 1px dashed var(--line-strong);
  padding: 0.7rem 0.9rem;
  margin-top: 1.4rem;
  line-height: 1.7;
}

/* abstracted app window — a paper printout pinned to the blueprint */
.app-abstract {
  position: sticky;
  top: 6rem;
  border: 1.5px solid var(--ink);
  background: var(--paper-card);
  color: var(--ink);
  box-shadow: 0 18px 40px rgba(3, 9, 18, 0.5);
  transform: rotate(0.4deg);
}
.app-abstract .chrome {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  border-bottom: 1.5px solid var(--ink);
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}
.app-abstract .chrome i { width: 9px; height: 9px; border: 1px solid var(--ink-soft); border-radius: 50%; }
.app-abstract .chrome i:first-child { background: var(--accent-deep); border-color: var(--accent-deep); }
.app-abstract .body { padding: 1rem; }
.abstract-row {
  display: grid;
  grid-template-columns: 2fr 4fr 1.4fr 1.4fr;
  gap: 0.6rem;
  padding: 0.55rem 0.4rem;
  border-bottom: 1px solid var(--ink-line);
  align-items: center;
}
.abstract-row .bar {
  height: 9px;
  background: var(--ink-line-strong);
  border-radius: 1px;
}
.abstract-row .bar.redacted {
  background: repeating-linear-gradient(45deg, var(--ink-soft), var(--ink-soft) 3px, transparent 3px, transparent 6px);
  opacity: 0.55;
}
.abstract-row .bar.accented { background: var(--accent-deep); opacity: 0.85; }
.abstract-row:nth-child(odd) .bar { opacity: 0.5; }
.abstract-caption {
  padding: 0.8rem 1rem;
  border-top: 1.5px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* stats band — paper strip */
.stats-band {
  margin-top: 4rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1.5px solid var(--ink);
  background: var(--paper-card);
  color: var(--ink);
  box-shadow: 0 14px 34px rgba(3, 9, 18, 0.45);
}
@media (max-width: 860px) { .stats-band { grid-template-columns: repeat(2, 1fr); } }
.stat-cell {
  padding: 1.6rem 1.4rem 1.5rem;
  border-right: 1px solid var(--ink-line-strong);
}
.stat-cell:last-child { border-right: none; }
@media (max-width: 860px) {
  .stat-cell:nth-child(2) { border-right: none; }
  .stat-cell:nth-child(-n+2) { border-bottom: 1px solid var(--ink-line-strong); }
}
.stat-cell .num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 560;
  color: var(--ink);
  line-height: 1;
}
.stat-cell .num span { color: var(--accent-deep); }
.stat-cell .lbl {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  line-height: 1.7;
}

/* ---------- process ---------- */

.process { background: var(--bg-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.process-steps { margin-top: 3rem; }
.process-step {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--line-strong);
  align-items: start;
}
.process-step:last-child { border-bottom: 1px solid var(--line-strong); }
.process-step .step-no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  padding-top: 0.35rem;
  white-space: nowrap;
}
.process-step h3 { font-size: clamp(1.25rem, 2.2vw, 1.7rem); margin-bottom: 0.6rem; color: var(--paper); }
.process-step p { color: var(--text-soft); max-width: 44rem; }
.process-step p code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(150, 182, 220, 0.1);
  border: 1px solid var(--line);
  padding: 0.08em 0.4em;
}
@media (max-width: 640px) {
  .process-step { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* ---------- verification & transparency ---------- */

.verify-block { margin-top: 4.5rem; }
.verify-title {
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  color: var(--paper);
  margin: 0.9rem 0 1.8rem;
  max-width: 24ch;
}
.verify-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 960px) { .verify-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .verify-grid { grid-template-columns: 1fr; } }
.verify-tile {
  background: var(--bg-deep);
  padding: 1.3rem 1.2rem 1.4rem;
  transition: background 0.3s ease;
}
.verify-tile:hover { background: var(--card); }
.verify-tile b {
  display: block;
  font-family: var(--font-display);
  font-weight: 560;
  font-size: 1.05rem;
  color: var(--paper);
  margin-bottom: 0.45rem;
}
.verify-tile b::before {
  content: "✓";
  color: var(--accent);
  font-family: var(--font-mono);
  margin-right: 0.55em;
}
.verify-tile p { font-size: 0.84rem; line-height: 1.6; color: var(--text-faint); }

/* ---------- engagement ---------- */

.engagement { border-top: 1px solid var(--line); }

.eng-track {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
@media (max-width: 860px) { .eng-track { grid-template-columns: 1fr; } }

.eng-step {
  border: 1px solid var(--card-edge);
  background: var(--card);
  padding: 1.6rem 1.5rem 1.7rem;
  position: relative;
  box-shadow: 4px 4px 0 rgba(4, 10, 20, 0.45);
}
.eng-step::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3.2rem; height: 3px;
  background: var(--accent);
}
.eng-idx {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.eng-big {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 560;
  color: var(--paper);
  margin: 0.7rem 0 0.6rem;
  line-height: 1.1;
}
.eng-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(255, 92, 31, 0.45);
  padding: 0.25em 0.7em;
  margin-bottom: 0.9rem;
}
.eng-step p { font-size: 0.9rem; color: var(--text-soft); line-height: 1.6; }

.eng-prices {
  display: flex;
  gap: 1px;
  margin-top: 1.1rem;
  border: 1px solid var(--line-strong);
  background: var(--line-strong);
}
.eng-prices span {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.55rem 0.7rem 0.6rem;
  background: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.eng-prices span b {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 560;
  letter-spacing: 0;
  color: var(--paper);
}

/* ---------- about ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

.about-copy p { color: var(--text-soft); margin-bottom: 1.1rem; max-width: var(--measure); }
.about-copy p strong { color: var(--paper); }

.cred-list { list-style: none; margin-top: 0.5rem; }
.cred-list li {
  border-top: 1px solid var(--line-strong);
  padding: 1.2rem 0;
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1.2rem;
  align-items: baseline;
}
.cred-list li:last-child { border-bottom: 1px solid var(--line-strong); }
.cred-list .cred-era {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.cred-list b { display: block; font-family: var(--font-display); font-size: 1.15rem; font-weight: 560; margin-bottom: 0.25rem; color: var(--paper); }
.cred-list p { font-size: 0.9rem; color: var(--text-soft); }
@media (max-width: 560px) {
  .cred-list li { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---------- final CTA + chat ---------- */

.final-cta {
  background: var(--bg-deep);
  color: var(--text);
  text-align: center;
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
}
.final-cta .section-inner { position: relative; z-index: 1; }
.final-cta h2 {
  color: var(--paper);
  font-size: clamp(2.2rem, 5.4vw, 4.2rem);
  max-width: 20ch;
  margin: 0 auto 1.4rem;
}
.final-cta h2 em { font-style: italic; font-weight: 400; color: var(--accent); }
.final-cta > .section-inner > p, .final-cta p.reveal {
  color: var(--text-soft);
  max-width: 36rem;
  margin: 0 auto 2.2rem;
}
.final-cta .mono-label { justify-content: center; display: flex; }

.cta-schematic {
  position: absolute;
  inset: -20%;
  opacity: 0.12;
  pointer-events: none;
  will-change: transform;
}

/* contact form — a paper work order pinned to the blueprint */
.work-order {
  max-width: 42rem;
  margin: 0 auto;
  text-align: left;
  border: 1.5px solid var(--ink);
  background: var(--paper-card);
  color: var(--ink);
  box-shadow: 0 22px 50px rgba(3, 9, 18, 0.55);
}
.form-fields { padding: 1.6rem 1.4rem 0.4rem; }
.wo-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}
@media (max-width: 560px) { .wo-row { grid-template-columns: 1fr; gap: 0; } }
.wo-field { display: block; margin-bottom: 1.3rem; }
.wo-field span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.4rem;
}
.wo-field span em { font-style: normal; text-transform: none; letter-spacing: 0.04em; }
.wo-field input,
.wo-field textarea {
  width: 100%;
  border: none;
  border-bottom: 1.5px solid var(--ink-line-strong);
  background: transparent;
  padding: 0.45rem 0.1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  outline: none;
  border-radius: 0;
  transition: border-color 0.2s;
}
.wo-field textarea {
  resize: vertical;
  min-height: 5.5rem;
  line-height: 1.55;
  background: linear-gradient(transparent calc(100% - 1px), var(--ink-line) 0) 0 0 / 100% 1.55em;
}
.wo-field input:focus, .wo-field textarea:focus { border-bottom-color: var(--accent-deep); }
.wo-field input::placeholder, .wo-field textarea::placeholder { color: var(--ink-faint); opacity: 0.7; }
.hp { position: absolute; left: -9999px; height: 0; width: 0; opacity: 0; }
.form-status { padding: 0 1.2rem; font-size: 0.9rem; line-height: 1.6; }
.form-status.err { color: #a4300f; padding-bottom: 0.8rem; }
.form-status.ok { color: var(--ink); padding: 1.4rem 1.2rem 1.6rem; }
.form-status a { color: var(--accent-deep); }
.stamp-received {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--accent-deep);
  border: 2px solid var(--accent-deep);
  padding: 0.3em 0.8em;
  transform: rotate(-3deg);
  margin: 0 0.8rem 0.6rem 0;
}
.wo-submit {
  display: block;
  width: 100%;
  border: none;
  border-top: 1.5px solid var(--ink);
  background: var(--accent-deep);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1.05em;
  cursor: pointer;
  transition: background 0.25s;
}
.wo-submit:hover { background: var(--ink); }
.wo-submit:disabled { opacity: 0.6; cursor: wait; }
.wo-foot {
  border-top: 1px solid var(--ink-line);
  padding: 0.65rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.contact-alt {
  margin-top: 1.6rem !important;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-faint) !important;
}
.contact-alt a { color: var(--text-soft); text-decoration: none; }
.contact-alt a:hover { color: var(--accent); }

/* ---------- footer ---------- */

footer {
  background: var(--bg-deep);
  color: var(--text-faint);
  border-top: 1px solid var(--line);
  padding: 2rem var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}
footer a { color: var(--text-soft); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ---------- responsive refinements ---------- */

@media (max-width: 960px) {
  .app-abstract { position: static; transform: none; }
}

@media (max-width: 720px) {
  section { padding: 4rem var(--gutter); }
  .section-num { font-size: clamp(4rem, 18vw, 7rem); opacity: 0.6; }
  .hero { padding: 6.5rem var(--gutter) 3.5rem; }
  .hero-meta { margin-top: 2.6rem; gap: 1.4rem 2rem; }
  .hero .lede { margin-bottom: 1.8rem; }
  .btn { padding: 0.9em 1.2em; font-size: 0.74rem; }
  .nav { padding: 0.75rem var(--gutter); }
  .nav-links .nav-cta { padding: 0.45em 0.8em; font-size: 0.7rem; }
  .pull-quote { margin: 1.5rem 0; }
  .stats-band { margin-top: 2.5rem; }
  .stat-cell { padding: 1.2rem 1rem 1.1rem; }
  .stat-cell .num { font-size: clamp(1.6rem, 8vw, 2.4rem); }
  .process-step { padding: 1.5rem 0; }
  .scroll-hint { display: none; }
  .chat-log { height: 260px; }
  footer { justify-content: center; text-align: center; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 2.35rem; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .cta-row .btn { text-align: center; }
}

/* ---------- motion safety ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-layer, .section-num, .legacy-block, .cta-schematic { transform: none !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .pipe-flowline, .scroll-hint, .chat-head .dot { animation: none; }
}