/* ============================================
   PIERFIND - Design System
   ============================================ */

:root {
  --navy: #0A1220;
  --porcelain: #F4F5F0;
  --teal: #39C6B0;
  --coral: #FF7566;
  --sky: #A8D8E8;
  --graphite: #202936;

  --font-heading: 'Sora', 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --nav-height: 72px;
  --container: min(1200px, 92vw);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass: rgba(10, 18, 32, 0.75);
  --glass-border: rgba(168, 216, 232, 0.12);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: clamp(0.9375rem, 1.5vw, 1rem);
  line-height: 1.6;
  color: var(--graphite);
  background: var(--porcelain);
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

.container { width: var(--container); margin-inline: auto; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Typography */
.label {
  font-family: var(--font-mono);
  font-size: clamp(0.625rem, 1.2vw, 0.75rem);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}
.label--mono { font-family: var(--font-mono); }
.label--light { color: var(--sky); }

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin-bottom: 1.5rem;
}
.section-title--stacked { display: flex; flex-direction: column; }
.section-title--stacked .accent { color: var(--teal); }
.section-title--stacked .accent-teal { color: var(--teal); }
.section-title--light { color: var(--porcelain); }

.section-sub {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--graphite);
  opacity: 0.8;
  max-width: 560px;
  margin-bottom: 3rem;
}
.section-sub--wide { max-width: 640px; }

.section { padding: clamp(4rem, 10vw, 8rem) 0; }
.section--dark { background: var(--navy); color: var(--porcelain); }
.section--porcelain { background: var(--porcelain); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}
.btn--coral {
  background: var(--coral);
  color: var(--navy);
}
.btn--coral:hover { background: #ff8a7d; transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  color: var(--porcelain);
  border: 1px solid rgba(244,245,240,0.25);
}
.btn--ghost:hover { border-color: var(--teal); color: var(--teal); }
.btn--sm { padding: 0.625rem 1.25rem; font-size: 0.8125rem; }
.btn--block { width: 100%; }

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* Logo */
.logo-wordmark {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.18em;
  color: var(--porcelain);
}
.logo-symbol { flex-shrink: 0; color: var(--porcelain); }

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: var(--transition);
}
.nav--scrolled {
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}
.nav__links {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2rem);
}
.nav__links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: rgba(244,245,240,0.75);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--porcelain); }
.nav__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav__status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--sky);
}
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--teal);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.nav__sign-in {
  font-size: 0.8125rem;
  color: rgba(244,245,240,0.75);
  transition: color var(--transition);
}
.nav__sign-in:hover { color: var(--porcelain); }
.nav__search-toggle,
.nav__menu-toggle { display: none; color: var(--porcelain); }
.nav__menu-toggle {
  flex-direction: column;
  gap: 5px;
  width: 28px;
}
.nav__menu-toggle span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: var(--transition);
}
.nav__menu-toggle[aria-expanded="true"] span:first-child {
  transform: rotate(45deg) translate(3px, 3px);
}
.nav__menu-toggle[aria-expanded="true"] span:last-child {
  transform: rotate(-45deg) translate(3px, -3px);
}
.nav__mobile {
  display: none;
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background: var(--navy);
  padding: 2rem;
  z-index: 999;
}
.nav__mobile nav {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.nav__mobile a {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--porcelain);
}
.nav__mobile.open { display: block; }

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--nav-height) + 3rem);
  padding-bottom: 4rem;
  background: var(--navy);
  color: var(--porcelain);
  display: flex;
  align-items: center;
}
.hero__bg { position: absolute; inset: 0; overflow: hidden; }
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168,216,232,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168,216,232,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}
.hero__content { position: relative; z-index: 1; }
.hero__headline {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
.hero__headline span { display: block; }
.hero__sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 540px;
  opacity: 0.8;
  margin-bottom: 2rem;
  line-height: 1.7;
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

/* Search Experience */
.search-experience { margin-top: 1rem; }
.search-box {
  display: flex;
  align-items: stretch;
  background: rgba(244,245,240,0.06);
  border: 1px solid rgba(168,216,232,0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(57,198,176,0.15);
}
.search-box__input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  position: relative;
}
.search-box__icon { color: var(--sky); opacity: 0.6; flex-shrink: 0; }
.search-box__input {
  flex: 1;
  background: none;
  border: none;
  color: var(--porcelain);
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.125rem);
  outline: none;
  position: relative;
  z-index: 2;
}
.search-box__input::placeholder { color: rgba(244,245,240,0.35); }
.search-box__placeholder {
  position: absolute;
  left: 3.25rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: rgba(168,216,232,0.5);
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 4rem);
  opacity: 0;
  transition: opacity 0.3s;
}
.search-box__placeholder.visible { opacity: 1; }
.search-box__submit {
  padding: 1.25rem 2rem;
  background: var(--teal);
  color: var(--navy);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
  white-space: nowrap;
}
.search-box__submit:hover { background: #4dd4bf; }

/* Search Results */
.search-results {
  margin-top: 2rem;
  padding: 2rem;
  background: rgba(244,245,240,0.04);
  border: 1px solid rgba(168,216,232,0.1);
  border-radius: var(--radius-lg);
  animation: fadeUp 0.5s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.search-results__query-text {
  font-family: var(--font-mono);
  font-size: clamp(0.9375rem, 2vw, 1.0625rem);
  color: var(--porcelain);
  margin-top: 0.5rem;
}
.search-results__understanding { margin: 1.5rem 0; }
.search-results__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.search-results__header h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.1em;
}
.signals-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--sky);
  padding: 0.375rem 0.75rem;
  border: 1px solid rgba(168,216,232,0.2);
  border-radius: 100px;
}

/* Tags */
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  background: rgba(57,198,176,0.12);
  color: var(--teal);
  border-radius: 4px;
  animation: tagIn 0.4s ease backwards;
}
.tag--outline {
  background: transparent;
  border: 1px solid rgba(168,216,232,0.3);
  color: var(--sky);
}
@keyframes tagIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

/* Recommendation Cards */
.rec-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.rec-card {
  background: var(--porcelain);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid rgba(32,41,54,0.08);
  transition: var(--transition);
  animation: cardIn 0.5s ease backwards;
}
.rec-card:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(10,18,32,0.08); }
.rec-card--best { border-color: var(--teal); border-width: 2px; }
.rec-card--alt { border-style: dashed; }
@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.rec-card__badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  color: var(--coral);
  margin-bottom: 0.75rem;
}
.rec-card__badge--teal { color: var(--teal); }
.rec-card__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.rec-card__why {
  font-size: 0.875rem;
  color: var(--graphite);
  opacity: 0.8;
  margin-bottom: 1rem;
  line-height: 1.6;
}
.rec-card__match {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}
.rec-card__match-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--graphite);
  opacity: 0.6;
}
.rec-card__match-value {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--teal);
}
.rec-card__strengths {
  margin: 0.75rem 0;
  font-size: 0.8125rem;
}
.rec-card__strengths li {
  padding: 0.2rem 0;
  padding-left: 1rem;
  position: relative;
}
.rec-card__strengths li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-size: 0.75rem;
}
.rec-card__tradeoff {
  font-size: 0.8125rem;
  color: var(--graphite);
  opacity: 0.7;
  margin-bottom: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(32,41,54,0.08);
}
.rec-card__explore {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  font-weight: 500;
}
.rec-card__explore:hover { color: var(--coral); }

/* Dark rec cards */
.rec-cards--dark .rec-card {
  background: rgba(244,245,240,0.05);
  border-color: rgba(168,216,232,0.1);
  color: var(--porcelain);
}
.rec-cards--dark .rec-card__title { color: var(--porcelain); }
.rec-cards--dark .rec-card__why,
.rec-cards--dark .rec-card__tradeoff { color: rgba(244,245,240,0.7); }
.rec-cards--hero .rec-card { background: rgba(244,245,240,0.95); }

/* ============================================
   Finding Map
   ============================================ */
.finding-map { background: var(--porcelain); }
.finding-map__viz {
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 2rem;
  overflow: hidden;
}
.finding-map__svg { width: 100%; height: auto; }
.fm-box { fill: rgba(57,198,176,0.15); stroke: var(--teal); stroke-width: 1; }
.fm-box--sub { fill: rgba(168,216,232,0.08); stroke: rgba(168,216,232,0.3); stroke-width: 0.75; }
.fm-box--out { fill: rgba(255,117,102,0.1); stroke: var(--coral); stroke-width: 0.75; }
.fm-hub { fill: rgba(57,198,176,0.2); stroke: var(--teal); stroke-width: 2; }
.fm-text {
  fill: var(--porcelain);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
}
.fm-text--sm { font-size: 8px; }
.fm-text--hub { font-size: 11px; font-weight: 500; }
.fm-path {
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  animation: drawPath 2s ease forwards;
}
.fm-path--in { animation-delay: 0.3s; }
.fm-path--out { animation-delay: 0.8s; }
@keyframes drawPath { to { stroke-dashoffset: 0; } }
.fm-dot { animation: dotTravel 3s ease infinite; }
.fm-dot--1 { animation-delay: 0s; }
.fm-dot--2 { animation-delay: 1s; }
.fm-dot--3 { animation-delay: 2s; }
@keyframes dotTravel {
  0%, 100% { opacity: 0; }
  10%, 90% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ============================================
   Trust Strip
   ============================================ */
.trust-strip {
  background: var(--graphite);
  padding: 2.5rem 0;
}
.trust-strip__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}
.trust-strip__headline {
  font-family: var(--font-heading);
  font-size: clamp(0.875rem, 2vw, 1.125rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--porcelain);
  max-width: 700px;
}
.trust-strip__indicators {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.5rem);
}
.trust-strip__indicators span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  color: var(--sky);
}

/* ============================================
   Problem / Comparison
   ============================================ */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}
.comparison__col {
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(32,41,54,0.1);
}
.comparison__col--old { background: rgba(32,41,54,0.03); }
.comparison__col--new {
  background: var(--navy);
  color: var(--porcelain);
  border-color: rgba(57,198,176,0.2);
}
.comparison__col h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
  opacity: 0.7;
}
.comparison__flow {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.comparison__flow span:not(.arrow) {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.5rem 0;
}
.comparison__flow .arrow {
  color: rgba(32,41,54,0.3);
  font-size: 1rem;
  padding: 0.125rem 0;
}
.comparison__flow--teal .arrow { color: var(--teal); }

/* ============================================
   How It Works
   ============================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
  margin-top: 3rem;
}
.steps__line {
  position: absolute;
  top: 2rem;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--sky), var(--teal));
  z-index: 0;
}
.steps__line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  animation: flowLine 3s ease infinite;
}
@keyframes flowLine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.step {
  position: relative;
  z-index: 1;
  padding: 1.5rem;
  background: var(--porcelain);
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius);
  transition: var(--transition);
}
.step:hover { border-color: var(--teal); transform: translateY(-4px); }
.step__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.75rem;
}
.step h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.step p { font-size: 0.875rem; opacity: 0.8; }

/* ============================================
   AI Search Section
   ============================================ */
.ai-search__demo { margin-top: 2rem; }
.ai-search__query blockquote {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--porcelain);
  padding: 1.5rem;
  border-left: 3px solid var(--teal);
  background: rgba(57,198,176,0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 2rem;
}
.ai-search__interpretation { margin-bottom: 2rem; }
.ai-search__results-title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--sky);
  margin-bottom: 1.5rem;
}

/* ============================================
   Recommendation Engine
   ============================================ */
.rec-engine__viz {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 3rem;
  padding: 3rem 2rem;
  background: var(--navy);
  border-radius: var(--radius-lg);
  color: var(--porcelain);
}
.rec-engine__you {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  padding: 1rem 2rem;
  border: 2px solid var(--sky);
  border-radius: 50%;
  width: 80px; height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}
.rec-engine__signals {
  font-size: 0.8125rem;
  opacity: 0.7;
}
.rec-engine__signals li { padding: 0.25rem 0; }
.rec-engine__arrow svg { width: 60px; height: 30px; }
.rec-engine__core {
  text-align: center;
  padding: 2rem;
  border: 2px solid var(--teal);
  border-radius: var(--radius);
  background: rgba(57,198,176,0.08);
}
.rec-engine__core span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  display: block;
  color: var(--sky);
}
.rec-engine__core strong {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 0.05em;
}
.rec-engine__output { display: flex; flex-direction: column; gap: 0.5rem; }
.rec-engine__out-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 0.625rem 1.25rem;
  border: 1px solid rgba(168,216,232,0.2);
  border-radius: 4px;
  text-align: center;
}
.rec-engine__out-item--match {
  border-color: var(--teal);
  background: rgba(57,198,176,0.12);
  color: var(--teal);
}
.rec-engine__out-item--wild {
  border-color: var(--coral);
  background: rgba(255,117,102,0.1);
  color: var(--coral);
}

/* ============================================
   Discovery Modes
   ============================================ */
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-bottom: 0;
}
.mode-tab {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 3vw, 2.5rem);
  font-weight: 700;
  padding: 1.5rem 1rem;
  color: rgba(32,41,54,0.25);
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  text-align: center;
}
.mode-tab:hover { color: var(--graphite); }
.mode-tab.active {
  color: var(--navy);
  border-bottom-color: var(--teal);
}
.mode-panel {
  padding: 3rem 2rem;
  background: var(--navy);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  min-height: 200px;
  transition: background var(--transition);
}
.mode-panel[data-mode="compare"] { background: #0d1a2e; }
.mode-panel[data-mode="explore"] { background: #0f1f35; }
.mode-panel[data-mode="recommend"] { background: #111827; }
.mode-panel__input {
  width: 100%;
  background: rgba(244,245,240,0.06);
  border: 1px solid rgba(168,216,232,0.15);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  color: var(--porcelain);
  font-family: var(--font-mono);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}
.mode-panel__viz {
  margin-top: 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}
.mode-viz-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  animation: modePulse 1.5s ease infinite;
}
.mode-viz-dot:nth-child(2) { animation-delay: 0.3s; background: var(--sky); }
.mode-viz-dot:nth-child(3) { animation-delay: 0.6s; background: var(--coral); }
@keyframes modePulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
}

/* ============================================
   Human Search
   ============================================ */
.human-search__demo { margin-top: 2rem; }
.human-search__interface {
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  margin-bottom: 2rem;
  min-height: 120px;
  display: flex;
  align-items: center;
}
.human-search__bar {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  color: var(--porcelain);
  width: 100%;
}
.human-search__cursor {
  animation: blink 1s step-end infinite;
  color: var(--teal);
}
@keyframes blink { 50% { opacity: 0; } }
.human-search__examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.example-query {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.625rem 1rem;
  border: 1px solid rgba(32,41,54,0.12);
  border-radius: 100px;
  color: var(--graphite);
  transition: var(--transition);
}
.example-query:hover,
.example-query.active {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(57,198,176,0.06);
}

/* ============================================
   AI Explanation
   ============================================ */
.explanation-panel {
  background: white;
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-top: 2rem;
}
.explanation-panel__header h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--navy);
  margin-top: 0.5rem;
}
.explanation-panel__because,
.explanation-panel__why { margin: 1.5rem 0; }
.explanation-panel__why blockquote {
  font-size: 1.0625rem;
  color: var(--graphite);
  margin-top: 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--teal);
  line-height: 1.7;
}
.explanation-panel__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(32,41,54,0.08);
}
.explanation-panel__col h4 {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.explanation-panel__col p,
.explanation-panel__col li {
  font-size: 0.875rem;
  opacity: 0.8;
  line-height: 1.6;
}
.explanation-panel__col li { padding: 0.25rem 0; }

/* ============================================
   Explore / Constellation
   ============================================ */
.constellation { position: relative; margin-top: 2rem; }
.constellation__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
}
.constellation__cat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(168,216,232,0.2);
  border-radius: 4px;
  color: rgba(244,245,240,0.6);
  transition: var(--transition);
}
.constellation__cat:hover,
.constellation__cat.active {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(57,198,176,0.08);
}
.constellation__discoveries {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
  min-height: 48px;
}
.constellation__node {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  padding: 0.625rem 1.25rem;
  background: rgba(57,198,176,0.1);
  border: 1px solid rgba(57,198,176,0.3);
  border-radius: 100px;
  color: var(--teal);
  animation: nodeIn 0.4s ease backwards;
}
@keyframes nodeIn {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}
.constellation__svg { width: 100%; height: auto; opacity: 0.5; }
.constellation__star { animation: starFloat 6s ease-in-out infinite; }
.cs-1 { animation-delay: 0s; }
.cs-2 { animation-delay: 1s; }
.cs-3 { animation-delay: 2s; }
.cs-4 { animation-delay: 3s; }
.cs-5 { animation-delay: 1.5s; }
.cs-6 { animation-delay: 2.5s; }
.cs-7 { animation-delay: 3.5s; }
@keyframes starFloat {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(-6px); opacity: 1; }
}

/* ============================================
   Compare Mode
   ============================================ */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}
.compare-option {
  padding: 2rem;
  border: 1px solid rgba(32,41,54,0.1);
  border-radius: var(--radius-lg);
  background: white;
  position: relative;
}
.compare-option--recommended {
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(57,198,176,0.1);
}
.compare-badge {
  position: absolute;
  top: -0.75rem;
  left: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  background: var(--teal);
  color: var(--navy);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
}
.compare-option h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  opacity: 0.6;
  margin-bottom: 0.25rem;
}
.compare-option__label {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 1.5rem;
}
.compare-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.compare-bar span {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  width: 70px;
  flex-shrink: 0;
  opacity: 0.6;
}
.bar {
  flex: 1;
  height: 6px;
  background: rgba(32,41,54,0.08);
  border-radius: 3px;
  overflow: hidden;
}
.bar__fill {
  height: 100%;
  background: var(--graphite);
  border-radius: 3px;
  transition: width 1s ease;
}
.bar__fill--teal { background: var(--teal); }
.compare-tradeoff {
  font-size: 0.8125rem;
  margin-top: 1rem;
  opacity: 0.7;
}
.compare-cta { margin-top: 1rem; }

/* ============================================
   Personalization
   ============================================ */
.profile-viz {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.profile-viz__card {
  flex: 1;
  min-width: 280px;
  padding: 2rem;
  background: white;
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius-lg);
}
.profile-viz__card h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 1rem;
}
.profile-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.profile-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5rem 1rem;
  background: rgba(57,198,176,0.08);
  border: 1px solid rgba(57,198,176,0.2);
  border-radius: 4px;
  color: var(--graphite);
}
.profile-viz__arrow {
  font-size: 2rem;
  color: var(--teal);
}
.profile-viz__effect {
  flex: 1;
  min-width: 240px;
  font-size: 0.9375rem;
  opacity: 0.8;
  line-height: 1.7;
}

/* ============================================
   Transparency
   ============================================ */
.transparency-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.transparency-item {
  padding: 2rem;
  background: white;
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius);
  transition: var(--transition);
}
.transparency-item:hover { border-color: var(--teal); }
.transparency-item h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.transparency-item p {
  font-size: 0.9375rem;
  line-height: 1.7;
  opacity: 0.85;
}

/* ============================================
   Use Cases
   ============================================ */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}
.use-case {
  padding: 2rem;
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius);
  background: white;
  transition: var(--transition);
  cursor: default;
}
.use-case:hover,
.use-case:focus {
  border-color: var(--teal);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10,18,32,0.06);
  outline: none;
}
.use-case h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.use-case p { font-size: 0.875rem; opacity: 0.75; line-height: 1.6; }

/* ============================================
   Case Study
   ============================================ */
.case-study__query {
  font-family: var(--font-mono);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--porcelain);
  margin: 1.5rem 0;
  max-width: 700px;
  line-height: 1.5;
}
.tag-row--light .tag { background: rgba(168,216,232,0.1); color: var(--sky); }
.case-study__results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 2.5rem 0;
}
.case-result {
  padding: 1.75rem;
  background: rgba(244,245,240,0.05);
  border: 1px solid rgba(168,216,232,0.1);
  border-radius: var(--radius);
}
.case-result--top { border-color: var(--teal); border-width: 2px; }
.case-result--wild { border-color: var(--coral); border-style: dashed; }
.case-result__badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  color: var(--coral);
  display: block;
  margin-bottom: 0.75rem;
}
.case-result--top .case-result__badge { color: var(--teal); }
.case-result h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--porcelain);
  margin-bottom: 0.5rem;
}
.case-result p { font-size: 0.875rem; opacity: 0.75; line-height: 1.6; }

/* ============================================
   Journal
   ============================================ */
.journal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.journal-card {
  padding: 2rem;
  background: white;
  border: 1px solid rgba(32,41,54,0.08);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.journal-card:hover { border-color: var(--teal); transform: translateY(-2px); }
.journal-card--featured { grid-row: span 2; }
.journal-card--offset { margin-top: 3rem; }
.journal-card__meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--teal);
  display: block;
  margin-bottom: 1rem;
}
.journal-card h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 600;
  color: var(--navy);
  line-height: 1.3;
}
.journal-card__visual {
  margin-top: 2rem;
  height: 180px;
  background: linear-gradient(135deg, rgba(57,198,176,0.15), rgba(168,216,232,0.2));
  border-radius: var(--radius);
}
.journal-card__visual--sm { height: 100px; }

/* ============================================
   The Pier
   ============================================ */
.pier-viz {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--navy);
  border-radius: var(--radius-lg);
}
.pier-viz__svg { width: 100%; height: auto; }
.pier-label {
  fill: rgba(244,245,240,0.6);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
}
.pier-label--find { fill: var(--teal); font-weight: 500; }
.pier-plank { animation: pierExtend 2s ease forwards; transform-origin: left; }
@keyframes pierExtend {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
.pier-traveler { animation: pierWalk 6s ease-in-out infinite; }
@keyframes pierWalk {
  0% { cx: 60; }
  25% { cx: 220; }
  50% { cx: 380; }
  75% { cx: 540; }
  90% { cx: 700; }
  100% { cx: 820; }
}
.find-glow { animation: findPulse 2s ease infinite; }
@keyframes findPulse {
  0%, 100% { r: 20; opacity: 0.6; }
  50% { r: 28; opacity: 0.3; }
}

/* ============================================
   Intent Animation
   ============================================ */
.intent-animation { padding: 4rem 0; }
.intent-animation__inner { text-align: center; }
.intent-word {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--teal);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Final CTA
   ============================================ */
.final-cta {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.final-cta__bg { position: absolute; inset: 0; }
.discovery-point {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--teal);
  animation: pointFloat 8s ease-in-out infinite;
}
.dp-1 { top: 20%; left: 15%; animation-delay: 0s; }
.dp-2 { top: 60%; left: 80%; animation-delay: 2s; background: var(--sky); }
.dp-3 { top: 30%; left: 60%; animation-delay: 4s; }
.dp-4 { top: 70%; left: 30%; animation-delay: 1s; background: var(--coral); }
.dp-5 { top: 45%; left: 90%; animation-delay: 3s; }
@keyframes pointFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.3; }
  50% { transform: translate(10px, -15px); opacity: 1; }
}
.final-cta__content { position: relative; z-index: 1; text-align: center; }
.final-cta__headline {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--porcelain);
  margin-bottom: 1.5rem;
}
.final-cta__headline span { display: block; }
.final-cta__sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  opacity: 0.7;
  margin-bottom: 2.5rem;
}
.final-cta__search {
  display: flex;
  max-width: 560px;
  margin: 0 auto;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(168,216,232,0.15);
}
.final-cta__search input {
  flex: 1;
  padding: 1.25rem 1.5rem;
  background: rgba(244,245,240,0.06);
  border: none;
  color: var(--porcelain);
  font-size: 1rem;
  outline: none;
}
.final-cta__search input::placeholder { color: rgba(244,245,240,0.35); }
.final-cta__search .btn { border-radius: 0; }

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--navy);
  color: rgba(244,245,240,0.7);
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(168,216,232,0.08);
}
.footer__inner { display: flex; flex-direction: column; gap: 3rem; }
.footer__brand { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer__tagline {
  font-size: 0.875rem;
  opacity: 0.6;
  margin-left: 2.25rem;
}
.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--porcelain);
  margin-bottom: 1rem;
}
.footer__col a {
  font-size: 0.875rem;
  display: block;
  padding: 0.3rem 0;
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--teal); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(168,216,232,0.08);
  font-size: 0.8125rem;
}
.footer__tech {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  color: var(--sky);
  opacity: 0.5;
}

/* ============================================
   Sticky Mobile Search
   ============================================ */
.sticky-search {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  padding: 0.75rem 1rem;
  background: rgba(10,18,32,0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(168,216,232,0.1);
  z-index: 900;
  transform: translateY(100%);
  transition: transform var(--transition);
}
.sticky-search.visible { transform: translateY(0); }

/* ============================================
   Scroll Reveal
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps__line { display: none; }
  .compare-grid,
  .case-study__results { grid-template-columns: 1fr; }
  .transparency-panel { grid-template-columns: 1fr; }
  .explanation-panel__grid { grid-template-columns: 1fr; }
  .use-case-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
  .rec-engine__viz { flex-direction: column; }
  .rec-engine__arrow { transform: rotate(90deg); }
}

@media (max-width: 768px) {
  .nav__links,
  .nav__status,
  .nav__sign-in { display: none; }
  .nav__search-toggle,
  .nav__menu-toggle { display: flex; }
  .nav__actions .btn--sm { display: none; }

  .hero__headline { font-size: clamp(2.25rem, 10vw, 3.5rem); }
  .search-box { flex-direction: column; }
  .search-box__submit { width: 100%; }

  .comparison { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .mode-tabs { grid-template-columns: repeat(2, 1fr); }
  .mode-tab { font-size: 1.25rem; padding: 1rem; }
  .journal-grid { grid-template-columns: 1fr; }
  .journal-card--featured { grid-row: auto; }
  .journal-card--offset { margin-top: 0; }
  .use-case-grid { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
  .final-cta__search { flex-direction: column; }
  .final-cta__search .btn { width: 100%; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }

  .sticky-search { display: block; }
  .finding-map__viz { padding: 1rem; overflow-x: auto; }
  .finding-map__svg { min-width: 600px; }
}

@media (max-width: 480px) {
  .rec-cards { grid-template-columns: 1fr; }
  .mode-tabs { grid-template-columns: 1fr 1fr; }
  .profile-viz { flex-direction: column; }
  .profile-viz__arrow { transform: rotate(90deg); }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .fm-path { stroke-dashoffset: 0; }
  .pier-plank { transform: scaleX(1); }
}