/* =========================================================================
   Palimpsest NYC — Marketing site styles
   Extends styles/tokens.css with section-level composition.
   ========================================================================= */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }

/* utility */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-8);
}
@media (max-width: 720px) { .container { padding: 0 var(--sp-5); } }

.muted { color: var(--ink-3); }
.mono { font-family: var(--font-mono); }
.serif-italic { font-family: var(--font-display); font-style: italic; color: var(--plum); }
.eyebrow-row {
  display: flex; align-items: center; gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}
.eyebrow-row .eyebrow { margin: 0; }
.eyebrow-row .tick {
  width: 24px; height: 1px; background: var(--magenta);
}

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(237, 241, 253, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, background-color 200ms ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--rule);
  background: rgba(237, 241, 253, 0.94);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: var(--sp-2); }
.nav-logo img { height: 28px; display: block; }
.nav-links {
  display: flex; align-items: center; gap: var(--sp-8);
  font-size: var(--fs-sm);
}
.nav-links a {
  color: var(--ink-2); border-bottom: none;
  font-weight: 500;
}
.nav-links a:hover { color: var(--cobalt); }
.nav-cta {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  background: var(--cobalt); color: var(--white);
  padding: 8px 14px; border-radius: var(--r-md);
  font-size: var(--fs-sm); font-weight: 500;
  border-bottom: none;
  transition: background 120ms ease;
}
.nav-cta:hover { background: var(--cobalt-2); border-bottom: none; }
.nav-cta svg { width: 14px; height: 14px; }

@media (max-width: 720px) {
  .nav-links { gap: var(--sp-4); }
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---------- Coordinate ticker (top of page) ---------- */
.coord-ticker {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 6px 0;
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.coord-ticker .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--magenta);
  animation: pulse 1.6s ease-in-out infinite;
}
.coord-ticker .sep { color: var(--ink-4); }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url("../assets/manhattan-grid.svg");
  background-size: 1400px;
  background-position: 50% 40%;
  background-repeat: no-repeat;
  opacity: 0.25;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, #000 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, #000 30%, transparent 90%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--sp-16);
  align-items: center;
  position: relative;
}
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-12); }
  .hero { padding: 56px 0 64px; }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 6.4vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.012em;
  color: var(--cobalt);
  margin: 0 0 var(--sp-6) 0;
}
.hero-title em {
  font-style: italic;
  color: var(--plum);
  font-weight: 500;
}
.hero-title .accent {
  color: var(--magenta);
  font-style: italic;
}
.hero-sub {
  font-size: var(--fs-lg);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 540px;
  margin: 0 0 var(--sp-8) 0;
}
.hero-meta {
  display: flex; align-items: center; gap: var(--sp-6);
  margin-top: var(--sp-8);
  font-size: var(--fs-sm);
  color: var(--ink-3);
  flex-wrap: wrap;
}
.hero-meta .pill {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: var(--r-pill);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-2);
  letter-spacing: 0.02em;
}
.hero-meta .pill .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--magenta);
}
.hero-meta .pill .dot.cobalt { background: var(--cobalt); }
.hero-meta .pill .dot.sky { background: var(--sky-2); }
.hero-meta .pill .dot.plum { background: var(--plum); }

.hero-cta-row { display: flex; gap: var(--sp-3); margin-top: var(--sp-2); flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 12px 18px;
  border-radius: var(--r-md);
  font-size: var(--fs-sm); font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 120ms ease;
  text-decoration: none; border-bottom: none;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--cobalt);
  color: var(--white);
}
.btn-primary:hover { background: var(--cobalt-2); border-bottom: none; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn-ghost:hover { border-color: var(--cobalt); color: var(--cobalt); border-bottom: 1px solid var(--cobalt); }
.btn svg { width: 14px; height: 14px; }

/* ---------- Hero atlas widget ---------- */
.atlas {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.atlas-header {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  background: var(--ice);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
}
.atlas-header .dots { display: flex; gap: 5px; }
.atlas-header .dots span {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--rule);
}
.atlas-header .title {
  color: var(--ink-2);
  letter-spacing: 0.04em;
  flex: 1;
}
.atlas-header .badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 7px;
  background: var(--magenta-tint);
  color: var(--plum);
  border-radius: var(--r-sm);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.atlas-header .badge .live-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--magenta);
  animation: pulse 1.4s ease-in-out infinite;
}

.atlas-map {
  position: relative;
  aspect-ratio: 16 / 11;
  background: linear-gradient(180deg, #E8EEFC 0%, #DEE6F7 100%);
}
.atlas-map svg.contours { position: absolute; inset: 0; width: 100%; height: 100%; }
.atlas-map .pin {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--ice);
  box-shadow: 0 1px 5px rgba(27, 18, 51, 0.3);
  transform: translate(-50%, -50%) scale(0);
  animation: pin-drop 600ms cubic-bezier(0.22, 1.2, 0.36, 1) forwards;
  z-index: 2;
}
.atlas-map .pin.cobalt { background: var(--cobalt); }
.atlas-map .pin.magenta { background: var(--magenta); }
.atlas-map .pin.plum { background: var(--plum); }
.atlas-map .pin.sky { background: var(--sky-2); }
.atlas-map .pin-label {
  position: absolute;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13px;
  color: var(--plum);
  transform: translate(0, -10px);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  animation: label-in 400ms ease forwards;
  z-index: 2;
}
@keyframes pin-drop {
  0% { transform: translate(-50%, -50%) scale(0); }
  60% { transform: translate(-50%, -50%) scale(1.25); }
  100% { transform: translate(-50%, -50%) scale(1); }
}
@keyframes label-in {
  to { opacity: 1; }
}
.atlas-map .walk-path {
  position: absolute; inset: 0;
  fill: none; stroke: var(--magenta); stroke-width: 2.5;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  opacity: 0.85;
}
.atlas-map .walk-path.draw { animation: dash-draw 2.4s ease forwards 1.6s; }
@keyframes dash-draw {
  to { stroke-dashoffset: 0; }
}

.atlas-stream {
  border-top: 1px solid var(--rule);
  background: var(--ice);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--ink-2);
  min-height: 152px;
  max-height: 152px;
  overflow: hidden;
  position: relative;
}
.atlas-stream .line {
  display: block;
  opacity: 0;
  animation: line-in 200ms ease forwards;
}
.atlas-stream .line.event-tool_call .k { color: var(--cobalt); }
.atlas-stream .line.event-tool_result .k { color: var(--sky-2); }
.atlas-stream .line.event-narration .k { color: var(--plum); }
.atlas-stream .line.event-citation .k { color: var(--magenta); }
.atlas-stream .line.event-walk .k { color: var(--cobalt-2); }
.atlas-stream .line.event-done .k { color: var(--success); }
.atlas-stream .line .k { font-weight: 500; }
.atlas-stream .line .v { color: var(--ink-3); }
.atlas-stream .line .s { color: var(--ink); }
@keyframes line-in {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: none; }
}
.atlas-stream .cursor {
  display: inline-block; width: 7px; height: 12px;
  background: var(--magenta); vertical-align: -2px;
  animation: blink 0.8s steps(1) infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Section header ---------- */
.section { padding: 120px 0; position: relative; }
.section.tight { padding: 80px 0; }
@media (max-width: 720px) { .section { padding: 72px 0; } }
.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--sp-16);
  align-items: start;
  margin-bottom: var(--sp-16);
}
@media (max-width: 860px) {
  .section-head { grid-template-columns: 1fr; gap: var(--sp-6); margin-bottom: var(--sp-10); }
}
.section-head h2 {
  font-size: clamp(36px, 4.5vw, 64px);
  letter-spacing: -0.01em;
  line-height: 1;
  margin: 0;
}
.section-head .deck {
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 540px;
}
.section-head .index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--magenta);
  text-transform: uppercase;
  display: inline-block;
  padding-left: 18px;
  position: relative;
  margin-bottom: var(--sp-3);
}
.section-head .index::before {
  content: ""; position: absolute;
  left: 0; top: 50%;
  width: 12px; height: 1px;
  background: var(--magenta);
  transform: translateY(-50%);
}

/* divider rule between sections */
.rule-section {
  border-top: 1px solid var(--rule);
  position: relative;
}
.rule-section::after {
  content: ""; position: absolute;
  top: -3px; left: 50%;
  width: 6px; height: 6px;
  background: var(--magenta);
  border-radius: 50%;
  transform: translateX(-50%);
}

/* ---------- Problem manifesto ---------- */
.manifesto {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--sp-16);
  align-items: start;
}
@media (max-width: 860px) {
  .manifesto { grid-template-columns: 1fr; gap: var(--sp-10); }
}
.manifesto-quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(32px, 3.4vw, 48px);
  line-height: 1.1;
  color: var(--plum);
  margin: 0 0 var(--sp-8) 0;
  letter-spacing: -0.005em;
}
.manifesto-body p {
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 var(--sp-4) 0;
  max-width: 520px;
}
.manifesto-body p strong {
  color: var(--cobalt);
  font-weight: 600;
}

.faux-output {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: var(--sp-8);
  font-size: var(--fs-md);
  line-height: 1.65;
  color: var(--ink);
  position: relative;
}
.faux-output .label {
  position: absolute; top: -10px; left: 20px;
  background: var(--paper); padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.faux-output .label.bad { color: var(--magenta); }
.faux-output .strike {
  background: linear-gradient(180deg, transparent 45%, var(--magenta-tint) 45%, var(--magenta-tint) 70%, transparent 70%);
  position: relative;
  padding: 0 2px;
}
.faux-output .strike::after {
  content: ""; position: absolute;
  left: 0; right: 0; top: 56%;
  height: 2px; background: var(--magenta);
  transform: rotate(-1.4deg);
}
.faux-output .corr {
  color: var(--cobalt);
  font-weight: 500;
  border-bottom: 1px dashed var(--cobalt-3);
}
.faux-output .cite {
  display: inline-flex; align-items: baseline;
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--magenta-tint);
  color: var(--plum);
  padding: 1px 5px;
  border-radius: var(--r-sm);
  margin-left: 4px;
  vertical-align: 2px;
}
.faux-output.good { margin-top: var(--sp-6); }

/* ---------- Architecture diagram ---------- */
.arch-diagram {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 56px 40px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.arch-diagram::before {
  content: ""; position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 50%;
  background-image: url("../assets/manhattan-grid.svg");
  background-size: 800px; background-position: 100% 50%;
  background-repeat: no-repeat;
  opacity: 0.12;
  pointer-events: none;
}
.arch-diagram svg { display: block; width: 100%; height: auto; position: relative; z-index: 1; }

.arch-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-8);
}
@media (max-width: 860px) {
  .arch-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .arch-grid { grid-template-columns: 1fr; }
}
.arch-card {
  padding: var(--sp-5);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--paper);
  transition: border-color 120ms ease, transform 120ms ease;
}
.arch-card:hover { border-color: var(--cobalt); transform: translateY(-2px); }
.arch-card .num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--magenta);
  letter-spacing: 0.18em;
  display: block;
  margin-bottom: var(--sp-2);
}
.arch-card h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--cobalt);
  margin: 0 0 6px 0;
  line-height: 1.1;
}
.arch-card p {
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-3);
  margin: 0;
}
.arch-card .tag {
  display: inline-block; margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-2);
  background: var(--ice-2);
  padding: 1px 6px;
  border-radius: var(--r-sm);
}

/* ---------- Numbers ---------- */
.numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-12);
}
@media (max-width: 860px) {
  .numbers { grid-template-columns: 1fr; gap: var(--sp-10); }
}
.num-block { position: relative; padding-top: 12px; }
.num-block::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 32px; height: 1px; background: var(--magenta);
}
.num-block .bignum {
  font-size: clamp(80px, 9vw, 128px);
  line-height: 0.92;
  margin: 0 0 var(--sp-3) 0;
}
.num-block .label {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  color: var(--plum);
  margin-bottom: var(--sp-2);
}
.num-block .desc {
  font-size: var(--fs-sm);
  color: var(--ink-3);
  line-height: 1.5;
  max-width: 280px;
}

/* ---------- Citation contract ---------- */
.contract {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: var(--sp-12);
  align-items: center;
}
@media (max-width: 860px) {
  .contract { grid-template-columns: 1fr; }
}
.contract-text h3 {
  font-size: var(--fs-3xl);
  margin: 0 0 var(--sp-4) 0;
}
.contract-text p {
  color: var(--ink-2);
  font-size: var(--fs-md);
  line-height: 1.55;
  max-width: 480px;
}
.contract-fields {
  list-style: none; padding: 0; margin: var(--sp-6) 0 0;
  display: flex; flex-direction: column; gap: var(--sp-3);
}
.contract-fields li {
  display: flex; gap: var(--sp-3); align-items: baseline;
  font-size: var(--fs-sm);
}
.contract-fields li .k {
  font-family: var(--font-mono);
  color: var(--cobalt);
  min-width: 110px;
}
.contract-fields li .desc { color: var(--ink-2); }

.contract-code {
  background: var(--ink);
  color: #DCE3F7;
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.contract-code code,
.contract-code code * {
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}
.contract-code::before {
  content: "citation.json";
  position: absolute; top: 12px; right: 16px;
  font-size: 10px; color: rgba(220, 227, 247, 0.5);
  letter-spacing: 0.1em;
}
.contract-code .k-key { color: var(--magenta-3); }
.contract-code .k-str { color: var(--sky); }
.contract-code .k-num { color: #E8A23A; }
.contract-code .k-punct { color: rgba(220, 227, 247, 0.5); }
.contract-code .k-com { color: rgba(220, 227, 247, 0.4); font-style: italic; }
.contract-code .check {
  display: inline-block; margin-left: 8px;
  color: var(--success);
}

/* ---------- Sources ---------- */
.sources-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}
@media (max-width: 860px) {
  .sources-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .sources-grid { grid-template-columns: 1fr; }
}
.source-card {
  padding: var(--sp-5);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  display: flex; flex-direction: column; gap: var(--sp-3);
  transition: all 120ms ease;
  position: relative;
  overflow: hidden;
}
.source-card:hover {
  border-color: var(--cobalt);
  transform: translateY(-2px);
}
.source-card .marker {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--ice);
  box-shadow: 0 1px 4px rgba(27, 18, 51, 0.25);
}
.source-card .marker.wikipedia { background: var(--plum); }
.source-card .marker.osm { background: var(--cobalt); }
.source-card .marker.chronicling { background: var(--magenta); }
.source-card .marker.nypl { background: var(--plum-2); }
.source-card .marker.nyc-open { background: var(--sky-2); }
.source-card .marker.mta { background: var(--cobalt-2); }
.source-card .marker.noaa { background: var(--sky); }
.source-card h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--cobalt);
  margin: 0;
  line-height: 1.1;
}
.source-card p {
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.45;
  margin: 0;
}
.source-card .status {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  text-transform: uppercase;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--rule);
  display: flex; align-items: center; gap: 6px;
}
.source-card .status .glyph { color: var(--success); }
.source-card .status.v2 .glyph { color: var(--warning); }
.source-card .status.v2 { color: var(--warning); }

/* ---------- Tech stack ---------- */
.tech-line {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--sp-12);
  padding: var(--sp-8) 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.tech-line:last-child { border-bottom: none; }
.tech-line .label {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  color: var(--plum);
}
.tech-line .items {
  display: flex; flex-wrap: wrap; gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--ink-2);
}
.tech-line .items span { display: inline-flex; align-items: center; gap: 6px; }
.tech-line .items span .glyph { color: var(--magenta); font-style: normal; }
@media (max-width: 720px) {
  .tech-line { grid-template-columns: 1fr; gap: var(--sp-3); padding: var(--sp-5) 0; }
}

/* ---------- Demo (chat + map) ---------- */
.demo {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  grid-template-rows: minmax(0, 1fr);
  gap: 0;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  height: 580px;
}
@media (max-width: 860px) {
  .demo { grid-template-columns: 1fr; grid-template-rows: 480px 480px; height: auto; }
}
.demo-chat {
  display: flex; flex-direction: column;
  background: var(--ice);
  border-right: 1px solid var(--rule);
  min-height: 0;
}
@media (max-width: 860px) { .demo-chat { border-right: none; border-bottom: 1px solid var(--rule); } }
.demo-chat-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 18px;
  color: var(--plum);
  display: flex; align-items: center; justify-content: space-between;
}
.demo-chat-header .live {
  font-family: var(--font-mono); font-style: normal;
  font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--magenta);
  display: inline-flex; align-items: center; gap: 6px;
}
.demo-chat-header .live .dot {
  width: 6px; height: 6px; background: var(--magenta); border-radius: 50%;
  animation: pulse 1.4s ease-in-out infinite;
}
.demo-chat-body {
  flex: 1; overflow-y: auto;
  padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.msg {
  display: flex; gap: 10px;
}
.msg.user { justify-content: flex-end; }
.msg .bubble {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: var(--r-md);
  font-size: 13px;
  line-height: 1.5;
}
.msg.user .bubble {
  background: var(--cobalt);
  color: var(--white);
}
.msg.agent .bubble {
  background: var(--paper);
  border: 1px solid var(--rule);
  color: var(--ink);
}
.msg.agent .bubble strong { color: var(--cobalt); font-weight: 600; }
.msg.agent .bubble em { color: var(--plum); font-style: italic; font-family: var(--font-display); font-size: 14px; }
.msg.agent .bubble .ref {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--magenta-tint);
  color: var(--plum);
  padding: 1px 5px;
  border-radius: var(--r-sm);
  margin-left: 2px;
  vertical-align: 1px;
  cursor: pointer;
}
.msg.agent .bubble .ref.osm { background: var(--cobalt-tint); color: var(--cobalt-2); }
.msg.agent .bubble .ref.wiki { background: var(--magenta-tint); color: var(--plum); }
.msg.tool .bubble {
  background: var(--ice-2);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-2);
  padding: 8px 12px;
  max-width: 92%;
}
.msg.tool .bubble .name { color: var(--cobalt); font-weight: 500; }
.msg.tool .bubble .arrow { color: var(--ink-4); }
.msg.tool .bubble .result { color: var(--ink-3); }
.demo-chat-input {
  border-top: 1px solid var(--rule);
  padding: 12px 16px;
  display: flex; gap: 8px;
  background: var(--paper);
}
.demo-chat-input input {
  flex: 1;
  background: transparent; border: none;
  font-family: var(--font-sans); font-size: 13px;
  color: var(--ink); padding: 6px 4px;
  outline: none;
}
.demo-chat-input input::placeholder { color: var(--ink-4); }
.demo-chat-input button {
  background: var(--cobalt); color: var(--white);
  padding: 6px 14px; border: none;
  border-radius: var(--r-md);
  font-family: var(--font-sans); font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}
.demo-chat-input button:hover { background: var(--cobalt-2); }

.demo-map {
  position: relative;
  background: linear-gradient(180deg, #E8EEFC 0%, #DEE6F7 100%);
  overflow: hidden;
}
.demo-map svg.contour-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.demo-map .map-header {
  position: absolute; top: 14px; left: 14px; right: 14px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px;
  background: rgba(83, 100, 192, 0.85);
  border-radius: var(--r-md);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.04em;
  z-index: 5;
  backdrop-filter: blur(2px);
}
.demo-map .map-header .title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
}
.demo-map .map-header .scale {
  font-family: var(--font-mono);
  font-size: 10px;
  opacity: 0.85;
}
.demo-map .pin {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--ice);
  box-shadow: 0 1px 5px rgba(27, 18, 51, 0.3);
  transform: translate(-50%, -50%);
  z-index: 3;
  cursor: pointer;
}
.demo-map .pin.wikipedia { background: var(--plum); }
.demo-map .pin.osm { background: var(--cobalt); }
.demo-map .pin.magenta { background: var(--magenta); }
.demo-map .pin.nypl { background: var(--plum-2); }
.demo-map .pin.sky { background: var(--sky-2); }
.demo-map .pin.active::after {
  content: ""; position: absolute; inset: -8px;
  border: 2px solid var(--magenta);
  border-radius: 50%;
  animation: ring 1.4s ease-out infinite;
}
@keyframes ring {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}
.demo-map .pin-label {
  position: absolute;
  transform: translate(12px, -8px);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 12px;
  color: var(--plum);
  pointer-events: none;
  z-index: 3;
  white-space: nowrap;
  background: rgba(248, 250, 254, 0.92);
  padding: 1px 6px;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule);
}
.demo-map .walk-path {
  position: absolute; inset: 0;
  fill: none; stroke: var(--magenta); stroke-width: 3;
  stroke-linecap: round; stroke-linejoin: round;
  opacity: 0.88;
  z-index: 2;
}
.demo-map .compass {
  position: absolute; bottom: 18px; right: 18px;
  width: 56px; height: 56px;
  z-index: 4;
}

/* ---------- Team ---------- */
.team {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8);
}
@media (max-width: 860px) {
  .team { grid-template-columns: 1fr; gap: var(--sp-6); }
}
.team-card {
  padding: var(--sp-8) var(--sp-6);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  background: var(--paper);
  position: relative;
  overflow: hidden;
  transition: all 200ms ease;
}
.team-card::before {
  content: ""; position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--cobalt);
}
.team-card:nth-child(2)::before { background: var(--magenta); }
.team-card:nth-child(3)::before { background: var(--plum); }
.team-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.team-card .initials {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 56px;
  color: var(--cobalt);
  line-height: 1;
  margin-bottom: var(--sp-4);
  letter-spacing: -0.02em;
}
.team-card:nth-child(2) .initials { color: var(--magenta); }
.team-card:nth-child(3) .initials { color: var(--plum); }
.team-card h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  color: var(--ink);
  margin: 0 0 6px 0;
  line-height: 1.1;
}
.team-card .role {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 16px;
  color: var(--plum);
  margin-bottom: var(--sp-3);
}
.team-card .email {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  display: block;
  border-top: 1px solid var(--rule);
  padding-top: var(--sp-3);
  margin-top: var(--sp-4);
}
.team-card .email a { color: var(--ink-3); border-bottom: none; }
.team-card .email a:hover { color: var(--cobalt); }
.team-card .affiliation {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--magenta);
  text-transform: uppercase;
  margin-top: var(--sp-3);
  display: block;
}

/* ---------- CTA section ---------- */
.cta {
  background: var(--plum);
  border-radius: var(--r-lg);
  padding: var(--sp-16) var(--sp-12);
  color: var(--ice);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background-image: url("../assets/manhattan-grid.svg");
  background-size: 1200px;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.1;
  filter: brightness(8);
  pointer-events: none;
}
.cta-inner { position: relative; }
.cta h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 4vw, 56px);
  color: var(--ice);
  margin: 0 0 var(--sp-4) 0;
  line-height: 1;
  letter-spacing: -0.005em;
}
.cta h2 em { font-style: italic; color: var(--magenta-3); font-weight: 500; }
.cta p {
  color: rgba(237, 241, 253, 0.75);
  font-size: var(--fs-md);
  max-width: 540px;
  margin: 0 auto var(--sp-8);
  line-height: 1.5;
}
.cta-buttons { display: inline-flex; gap: var(--sp-3); flex-wrap: wrap; justify-content: center; }
.cta-buttons .btn-primary {
  background: var(--magenta);
}
.cta-buttons .btn-primary:hover { background: var(--magenta-2); }
.cta-buttons .btn-ghost {
  background: transparent;
  color: var(--ice);
  border-color: rgba(237, 241, 253, 0.3);
}
.cta-buttons .btn-ghost:hover {
  border-color: var(--ice);
  color: var(--ice);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--rule);
  padding: var(--sp-12) 0 var(--sp-8);
  margin-top: var(--sp-12);
  font-size: var(--fs-sm);
  color: var(--ink-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  margin-bottom: var(--sp-12);
}
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-grid .col h5 {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--magenta);
  margin: 0 0 var(--sp-3) 0;
  font-weight: 600;
}
.footer-grid .col a {
  display: block;
  color: var(--ink-2);
  padding: 4px 0;
  border-bottom: none;
}
.footer-grid .col a:hover { color: var(--cobalt); }
.footer-grid .lockup img { height: 32px; margin-bottom: var(--sp-3); }
.footer-grid .lockup p { font-size: 13px; max-width: 320px; color: var(--ink-3); margin: 0; line-height: 1.5; }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
@media (max-width: 720px) {
  .footer-bottom { flex-direction: column; gap: var(--sp-3); align-items: flex-start; }
}
.footer-bottom .coords { color: var(--ink-4); }

/* ---------- Decorative section banner (contour) ---------- */
.contour-banner {
  position: absolute; left: 0; right: 0; height: 60px;
  pointer-events: none; opacity: 0.35;
  z-index: 0;
}
.contour-banner svg { width: 100%; height: 100%; }
.contour-banner.top { top: -1px; }
.contour-banner.bot { bottom: -1px; transform: scaleY(-1); }