/* LibraryOps — design tokens & base styles */

:root {
  /* Color tokens */
  --ink: #17211f;
  --ink-soft: #42504c;
  --paper: #f8f7f1;
  --paper-strong: #fffdf7;
  --line: #d8d5c8;
  --moss: #355c4a;
  --moss-deep: #203c33;
  --blueprint: #2b5c78;
  --copper: #a45735;
  --gold: #c49a48;
  --sage: #dce7dc;
  --blue-pale: #dbe8ef;

  /* Type */
  --serif: "IBM Plex Serif", Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Spacing */
  --gutter: 24px;
  --section-y: 120px;

  /* Radii */
  --r-sm: 2px;
  --r-md: 4px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--gold); color: var(--ink); }

/* Subtle paper grain on the body */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(rgba(23,33,31,0.025) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.6;
}

main, nav, footer { position: relative; z-index: 1; }

/* ---- Layout ---- */

.wrap {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: var(--section-y) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  margin-bottom: 64px;
  align-items: start;
}

.section-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 14px;
  border-top: 2px solid var(--ink);
  display: inline-block;
  align-self: start;
}

.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 22ch;
}

.section-title em {
  font-style: italic;
  color: var(--moss-deep);
}

.section-kicker {
  font-family: var(--sans);
  font-size: 17px;
  color: var(--ink-soft);
  margin: 20px 0 0;
  max-width: 62ch;
}

/* ---- Nav ---- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248,247,241,0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1280px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 28px; height: 28px;
  display: inline-block;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  font-family: var(--sans);
  font-size: 14.5px;
}

.nav-links a {
  color: var(--ink-soft);
  transition: color 120ms ease-out;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--ink); }

.nav-cta {
  font-family: var(--sans);
  font-size: 14px;
  padding: 9px 16px;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  transition: background 120ms ease-out, color 120ms ease-out;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover { background: var(--moss-deep); border-color: var(--moss-deep); }

/* ---- Hero ---- */

.hero {
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  min-height: 560px;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--moss);
  margin: 0 0 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--moss);
  display: inline-block;
}

.hero-h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 72px;
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 28px;
  color: var(--ink);
  text-wrap: balance;
}

.hero-h1 em {
  font-style: italic;
  color: var(--moss-deep);
}

.hero-h1 .underline {
  background-image: linear-gradient(to top, var(--gold) 0, var(--gold) 8px, transparent 8px);
  background-repeat: no-repeat;
  background-position: 0 92%;
  padding: 0 2px;
}

.hero-sub {
  font-family: var(--sans);
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 40px;
  max-width: 48ch;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  padding: 14px 22px;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  transition: background 120ms ease-out, color 120ms ease-out, transform 80ms ease-out;
}

.btn:hover { background: var(--moss-deep); border-color: var(--moss-deep); }
.btn:active { transform: scale(0.98); }

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

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

.btn .arrow {
  display: inline-block;
  transition: transform 160ms ease-out;
}
.btn:hover .arrow { transform: translateX(4px); }

/* Hero canvas frame */
.hero-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  background: var(--paper-strong);
  background-image:
    linear-gradient(to right, rgba(23,33,31,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23,33,31,0.045) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-canvas-corner {
  position: absolute;
  width: 12px; height: 12px;
  border: 1.5px solid var(--ink);
}
.hero-canvas-corner.tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.hero-canvas-corner.tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.hero-canvas-corner.bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.hero-canvas-corner.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.hero-canvas-tag {
  position: absolute;
  top: 16px; left: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper-strong);
  padding: 4px 8px;
  border: 1px solid var(--line);
  white-space: nowrap;
}

.hero-canvas-legend {
  position: absolute;
  bottom: 16px; left: 16px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--paper-strong);
  padding: 6px 10px;
  border: 1px solid var(--line);
  display: flex; align-items: center; gap: 14px;
}
.hero-canvas-legend .dot { width: 7px; height: 7px; display: inline-block; margin-right: 6px; vertical-align: middle; }

.hero-meta {
  display: flex;
  gap: 32px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.hero-meta strong {
  display: block;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 4px;
  font-style: italic;
}

/* ---- Problem section ---- */

.problem {
  background: var(--paper-strong);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.problem-cell {
  background: var(--paper-strong);
  padding: 36px 36px 40px;
  position: relative;
}

.problem-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--copper);
  margin-bottom: 14px;
  display: block;
}

.problem-h {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.25;
  margin: 0 0 12px;
  color: var(--ink);
}

.problem-cell p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.6;
  max-width: 44ch;
}

/* ---- Method ---- */

.method-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.method-step {
  padding: 36px 28px 40px;
  border-right: 1px solid var(--line);
  position: relative;
}
.method-step:last-child { border-right: none; }

.method-step-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.method-step-n .dot {
  width: 6px; height: 6px;
  background: var(--moss);
  display: inline-block;
}

.method-step h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 24px;
  margin: 0 0 12px;
  color: var(--ink);
}

.method-step p {
  font-size: 14.5px;
  color: var(--ink-soft);
  margin: 0 0 20px;
  line-height: 1.55;
}

.method-step-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--moss);
  border-top: 1px dashed var(--line);
  padding-top: 14px;
  display: block;
}

/* ---- Services ---- */

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service {
  border: 1px solid var(--line);
  background: var(--paper-strong);
  padding: 32px 28px 36px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 340px;
  transition: border-color 160ms ease-out, transform 160ms ease-out;
}

.service:hover {
  border-color: var(--ink);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}

.service-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-tag .ix { color: var(--copper); }

.service h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.2;
  margin: 0 0 14px;
  color: var(--ink);
}

.service p {
  font-size: 14.5px;
  color: var(--ink-soft);
  margin: 0 0 24px;
  line-height: 1.6;
}

.service-list {
  margin: auto 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.service-list li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-list li::before {
  content: "→";
  color: var(--moss);
  flex-shrink: 0;
}

/* ---- Deliverables ---- */

.deliverables-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}

.deliverables-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.deliverable {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.deliverable .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
  padding-top: 6px;
}

.deliverable .name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 4px;
}

.deliverable .desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.deliverable .format {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper);
  white-space: nowrap;
  padding-top: 8px;
}

.atlas {
  border: 1px solid var(--line);
  background: var(--paper-strong);
  background-image:
    linear-gradient(to right, rgba(23,33,31,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23,33,31,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  padding: 28px;
  aspect-ratio: 4/5;
  position: relative;
}

.atlas-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  position: absolute;
  top: 20px; left: 20px;
  background: var(--paper-strong);
  padding: 4px 8px;
  border: 1px solid var(--line);
}

.atlas svg { width: 100%; height: 100%; }

/* ---- AI principles ---- */

.ai {
  background: var(--moss-deep);
  color: var(--paper);
}

.ai .section-label {
  color: rgba(248,247,241,0.6);
  border-color: var(--paper);
}

.ai .section-title { color: var(--paper); }
.ai .section-title em { color: var(--gold); }
.ai .section-kicker { color: rgba(248,247,241,0.7); }

.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid rgba(248,247,241,0.15);
  border-left: 1px solid rgba(248,247,241,0.15);
}

.principle {
  border-right: 1px solid rgba(248,247,241,0.15);
  border-bottom: 1px solid rgba(248,247,241,0.15);
  padding: 32px 36px 36px;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  align-items: start;
}

.principle-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 6px;
}

.principle h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  margin: 0 0 10px;
  color: var(--paper);
  line-height: 1.25;
}

.principle p {
  font-size: 14.5px;
  color: rgba(248,247,241,0.72);
  margin: 0;
  line-height: 1.6;
}

.ai-rule {
  margin-top: 64px;
  padding: 28px 32px;
  background: rgba(248,247,241,0.06);
  border: 1px solid rgba(248,247,241,0.18);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
}

.ai-rule-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
}

.ai-rule p {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.35;
  margin: 0;
  color: var(--paper);
  font-style: italic;
}

/* ---- Audience panels ---- */

.audience-tabs {
  display: flex;
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-bottom: 0;
}

.audience-tab {
  flex: 1;
  background: var(--paper-strong);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 120ms ease-out;
  font-family: inherit;
  text-align: left;
  color: var(--ink);
}

.audience-tab:last-child { border-right: none; }

.audience-tab:hover { background: var(--sage); }

.audience-tab.active {
  background: var(--ink);
  color: var(--paper);
}

.audience-tab .role {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.audience-tab.active .role { color: var(--gold); }

.audience-tab .who {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
}

.audience-panel {
  display: none;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-top: none;
  padding: 56px;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.audience-panel.active { display: grid; }

.audience-panel .pitch {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.3;
  margin: 0;
  color: var(--ink);
  font-style: italic;
}

.audience-panel .body p {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0 0 14px;
  line-height: 1.6;
}

.audience-panel h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--moss);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.audience-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.audience-panel li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.audience-panel li::before {
  content: "—";
  color: var(--copper);
  flex-shrink: 0;
}

/* ---- Contact ---- */

.contact {
  background: var(--ink);
  color: var(--paper);
  padding: 140px 0 120px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: end;
}

.contact-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 24px;
}

.contact h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 56px;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 24px;
  color: var(--paper);
}
.contact h2 em { font-style: italic; color: var(--gold); }

.contact .lede {
  font-size: 18px;
  color: rgba(248,247,241,0.72);
  margin: 0 0 36px;
  max-width: 50ch;
  line-height: 1.55;
}

.contact-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.contact .btn {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}
.contact .btn:hover { background: var(--paper); border-color: var(--paper); }

.contact .btn.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(248,247,241,0.3);
}
.contact .btn.btn-ghost:hover { border-color: var(--paper); background: rgba(248,247,241,0.06); }

.contact-card {
  border: 1px solid rgba(248,247,241,0.18);
  padding: 32px;
  background: rgba(248,247,241,0.04);
}

.contact-card-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 18px;
}

.contact-row {
  display: flex;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(248,247,241,0.15);
  font-size: 14px;
}
.contact-row:last-child { border-bottom: none; }
.contact-row .k { color: rgba(248,247,241,0.55); font-family: var(--mono); font-size: 12px; }
.contact-row .v { color: var(--paper); }

/* ---- Footer ---- */

.footer {
  background: var(--paper);
  padding: 40px 0 60px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.footer-inner a:hover { color: var(--ink); }

/* ---- Responsive ---- */

@media (max-width: 1024px) {
  :root { --section-y: 80px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-h1 { font-size: 56px; }
  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .section-title { font-size: 36px; }
  .method-steps { grid-template-columns: repeat(2, 1fr); }
  .method-step { border-bottom: 1px solid var(--line); }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .deliverables-layout { grid-template-columns: 1fr; }
  .audience-panel.active { grid-template-columns: 1fr; gap: 32px; padding: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact h2 { font-size: 42px; }
}

@media (max-width: 720px) {
  .hero-h1 { font-size: 44px; }
  .nav-links { display: none; }
  .principles, .problem-grid, .services-grid { grid-template-columns: 1fr; }
  .audience-tabs { flex-wrap: wrap; }
  .audience-tab { flex: 1 0 50%; }
  .hero-meta { flex-direction: column; gap: 16px; }
  .contact h2 { font-size: 34px; }
}