:root {
  --accent: #E88CA5;
  --accent-dark: #D16C8C;
  --ink: #1d1d1f;
  --ink-soft: #6e6e73;
  --hairline: #d2d2d7;
  --panel: #f5f5f7;
  --white: #ffffff;
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

.card, .model-card, .choose-card, .faq-item, section[id] {
  scroll-margin-top: 90px;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--white);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,0.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--hairline);
}
header.site .bar {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header.site .brand {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}
header.site .brand .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
nav.primary { display: flex; gap: 26px; }
nav.primary .nav-item {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: -14px;
}
nav.primary .nav-item > a {
  display: inline-block;
  font-size: 14px;
  color: var(--ink-soft);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
nav.primary .nav-item > a:hover, nav.primary .nav-item > a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 230px;
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
  z-index: 50;
}
.nav-dropdown.align-right { left: auto; right: 0; }
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
}
.nav-dropdown a:hover {
  background: var(--panel);
  color: var(--accent-dark);
}
@media (max-width: 900px) {
  .nav-dropdown { display: none; }
}

/* Mobile nav toggle */
.nav-toggle-btn {
  display: none;
  background: transparent;
  border: none;
  padding: 0;
}
@media (max-width: 768px) {
  .bar { flex-wrap: wrap; }
  .nav-toggle-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    margin-left: auto;
    cursor: pointer;
  }
  .nav-toggle-btn:hover { background: var(--panel); }
  .nav-toggle-btn span {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  nav.primary {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
  }
  nav.primary .nav-item {
    width: 100%;
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: 1px solid var(--hairline);
  }
  nav.primary .nav-item:last-child { border-bottom: none; }
  nav.primary .nav-item > a {
    display: block;
    padding: 14px 2px;
  }
  .nav-icons {
    display: none;
    width: 100%;
    margin: 0;
    padding: 16px 0 0;
    border-left: none;
    border-top: 1px solid var(--hairline);
    justify-content: flex-end;
  }
  header.site.nav-open nav.primary,
  header.site.nav-open .nav-icons {
    display: flex;
  }
  header.site.nav-open .nav-toggle-btn span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  header.site.nav-open .nav-toggle-btn span:nth-child(2) { opacity: 0; }
  header.site.nav-open .nav-toggle-btn span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* Nav icons: search, language, account */
.nav-icons {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 22px;
  padding-left: 22px;
  border-left: 1px solid var(--hairline);
}
.nav-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--ink-soft);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-icon-btn:hover, .nav-icon-btn.active {
  background: var(--panel);
  color: var(--accent-dark);
}
.nav-icon-btn svg { width: 19px; height: 19px; }
.nav-icon-wrap { position: relative; display: flex; }

.nav-tooltip {
  position: absolute;
  top: calc(100% + 12px);
  right: -6px;
  background: var(--ink);
  color: #ffffff;
  font-size: 12.5px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 60;
}
.nav-tooltip::after {
  content: '';
  position: absolute;
  bottom: 100%;
  right: 16px;
  border: 5px solid transparent;
  border-bottom-color: var(--ink);
}
.nav-tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-search-bar {
  position: absolute;
  top: calc(100% + 12px);
  right: -6px;
  width: 320px;
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  box-shadow: 0 18px 40px rgba(0,0,0,0.16);
  padding: 12px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 65;
}
.nav-search-bar.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-search-bar input {
  display: block;
  width: 100%;
  margin: 0;
  font-size: 14.5px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--hairline);
  background: var(--panel);
  font-family: inherit;
  box-sizing: border-box;
}
.nav-search-bar input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}
.nav-search-empty {
  display: none;
  margin: 10px 0 2px;
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.nav-search-empty.visible { display: block; }
@media (max-width: 900px) {
  .nav-icons { margin-left: 12px; padding-left: 12px; }
  .nav-search-bar { right: 0; width: 280px; }
}

/* Hero */
.hero {
  text-align: center;
  padding: 84px 24px 56px;
}
.hero p.sub {
  font-size: 20px;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto 8px;
  line-height: 1.5;
}
.hero .accent { color: var(--accent-dark); }

.hero.hero-gradient {
  position: relative;
  padding: 120px 24px 88px;
  background: linear-gradient(165deg, #ffffff 0%, #FDE2E4 50%, #FAD2E1 100%);
  border-bottom: 1px solid var(--hairline);
}
.hero.hero-gradient h1 {
  font-size: 58px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.hero:not(.hero-gradient) h1 {
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.hero.hero-pattern {
  position: relative;
  background:
    radial-gradient(circle, rgba(209,108,140,0.16) 1px, transparent 1.6px) 0 0 / 26px 26px,
    linear-gradient(165deg, #ffffff 0%, #FDE2E4 55%, #FAD2E1 100%);
  border-bottom: 1px solid var(--hairline);
}

section { padding: 80px 0; }
section.tight { padding: 40px 0; }
section.panel-bg { background: var(--panel); }

h2.section-title {
  font-size: 37px;
  font-weight: 700;
  letter-spacing: -0.015em;
  text-align: center;
  margin: 0 0 12px;
}
p.section-sub {
  text-align: center;
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.55;
}

/* Explainer strip */
.explainer-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 0 0 8px;
}
.explainer-card {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 24px;
}
.explainer-card .label {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.icon-tile {
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 10px;
  background: rgba(232,140,165,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-tile svg { width: 18px; height: 18px; }
.explainer-card p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0;
}

/* Product grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
@media (max-width: 768px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.product-image {
  width: 100%;
  height: 170px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, #f5f5f7, #eceef0);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-image .illustration-note {
  position: absolute;
  bottom: 6px;
  left: 8px;
  right: 8px;
  font-size: 10px;
  color: var(--ink-soft);
  background: rgba(255,255,255,0.85);
  border-radius: 6px;
  padding: 2px 6px;
  text-align: center;
}

.maker-logo {
  height: 22px;
  width: auto;
  vertical-align: middle;
  margin-right: 6px;
}

.why-box {
  background: rgba(232,140,165,0.06);
  border: 1px solid rgba(232,140,165,0.25);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
  margin-top: 14px;
}
.why-box .why-label {
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
  margin-bottom: 6px;
  display: block;
}

/* Trust bar */
.trust-bar {
  padding: 44px 0;
  background: var(--panel);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.trust-bar-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
}
.trust-label {
  font-size: 12.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}
.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: opacity 0.2s ease, filter 0.2s ease;
}
.trust-item:hover {
  filter: grayscale(0%);
  opacity: 1;
}
.trust-item img {
  height: 26px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
}
.trust-item span {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
}

/* Carousel */
.carousel-section {
  padding: 48px 0 56px;
}
.carousel-heading {
  margin-bottom: 22px;
}
.carousel-viewport {
  position: relative;
}
.carousel-track-wrap {
  overflow: hidden;
  width: 100%;
  mask-image: linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
}
.carousel-track {
  display: flex;
  gap: 20px;
  width: max-content;
  padding: 4px 0;
  will-change: transform;
  animation: carousel-scroll 34s linear infinite;
}
.carousel-track-wrap:hover .carousel-track,
.carousel-track.is-paused {
  animation-play-state: paused;
}
@keyframes carousel-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-1920px); }
}
@media (prefers-reduced-motion: reduce) {
  .carousel-track { animation: none; }
  .carousel-track-wrap { overflow-x: auto; }
}
.carousel-card {
  flex: 0 0 300px;
  height: 400px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 26px 24px 24px;
  background: #f5f5f7;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.carousel-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.1);
}
.carousel-card-text { position: relative; z-index: 1; }
.carousel-card-category {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}
.carousel-card-text h4 {
  margin: 6px 0 8px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.carousel-card-text p {
  margin: 0;
  max-width: 88%;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.45;
}
.carousel-card-icon {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 6px;
}
.carousel-card-icon img {
  width: 100%;
  max-width: 224px;
  height: 168px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}
.carousel-card-plus {
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.carousel-card-plus svg { width: 16px; height: 16px; }
.carousel-card:hover .carousel-card-plus {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
}
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--hairline);
  background: rgba(255,255,255,0.95);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink);
}
.carousel-arrow svg { width: 20px; height: 20px; }
.carousel-arrow:hover { background: var(--white); box-shadow: 0 6px 20px rgba(0,0,0,0.18); }
.carousel-arrow.left { left: -4px; }
.carousel-arrow.right { right: -4px; }
@media (max-width: 900px) {
  .carousel-arrow { display: none; }
}

/* FAQ */
.faq-item {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 4px 20px;
  margin-bottom: 14px;
}
.faq-item summary {
  font-weight: 600;
  font-size: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  float: right;
  font-weight: 400;
  color: var(--ink-soft);
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.65;
  padding-bottom: 18px;
  margin: 0;
}

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
  background: rgba(232,140,165,0.1);
  padding: 4px 10px;
  border-radius: 20px;
  width: fit-content;
}

.card h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card .blurb {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0;
}

.stat-list { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }

.stat .stat-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.stat .stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stat .stat-value {
  font-size: 18px;
  font-weight: 700;
}
.stat .stat-explain {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.45;
  margin: 3px 0 0;
}

hr.divider { border: none; border-top: 1px solid var(--hairline); margin: 4px 0; }

.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--white) !important;
  font-size: 14px;
  font-weight: 600;
  padding: 11px 20px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-align: center;
}
.btn:hover { background: #333; }
.btn.accent { background: var(--accent); }
.btn.accent:hover { background: var(--accent-dark); }
.btn.ghost { background: transparent; color: var(--ink) !important; border: 1px solid var(--hairline); }
.btn.small { padding: 8px 16px; font-size: 13px; }
.btn.full { width: 100%; }

/* Model advisor */
.model-card {
  border: 1.5px solid rgba(212,83,126,0.55);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 22px;
  box-shadow: 0 0 8px rgba(212,83,126,0.4), 0 0 16px rgba(212,83,126,0.2);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.model-card:hover {
  border-color: rgba(212,83,126,0.75);
  box-shadow: 0 0 12px rgba(212,83,126,0.55), 0 0 26px rgba(212,83,126,0.32);
}
.model-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.model-head h3 { margin: 0 0 4px; font-size: 26px; }
.model-meta { font-size: 13px; color: var(--ink-soft); }
.license-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(232,140,165,0.1);
  padding: 3px 10px;
  border-radius: 20px;
}

.math-box {
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
}
.math-box .formula {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 10px 14px;
  display: inline-block;
  margin: 6px 0;
}

.build-box {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.build-box .build-title { font-weight: 700; font-size: 15px; margin-bottom: 10px; }
.build-line {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--hairline);
}
.build-line:last-of-type { border-bottom: none; }
.build-totals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px,1fr));
  gap: 12px;
  margin-top: 14px;
}
.total-pill {
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.total-pill .t-label { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); font-weight: 600; }
.total-pill .t-value { font-size: 19px; font-weight: 700; margin-top: 2px; }
.total-pill .t-explain { font-size: 12px; color: var(--ink-soft); margin-top: 4px; line-height: 1.4; }

/* choose page */
.choose-stack { display: flex; flex-direction: column; }
.choose-card-full {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
}
.choose-card-full .kicker { font-size: 13px; font-weight: 700; color: var(--accent-dark); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.choose-card-full h3 { margin: 0 0 20px; font-size: 26px; }
.choose-card-full .need { color: var(--ink-soft); font-size: 15px; margin-bottom: 20px; line-height: 1.5; max-width: 680px; }

.choose-picker {
  max-width: 820px;
  margin: 0 auto;
}
.choose-picker[hidden] { display: none; }
.choose-picker-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 768px) {
  .choose-picker-grid { grid-template-columns: 1fr; }
}
.choose-option-card {
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.2s ease;
}
.choose-option-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  border-color: #76b900;
}
.choose-option-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border-radius: 50%;
  background: rgba(118,185,0,0.12);
}
.choose-option-icon svg { width: 36px; height: 36px; }
.choose-option-card h3 { margin: 0 0 10px; font-size: 22px; }
.choose-option-card p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; }

/* Quiz — intentionally green (NVIDIA's own brand color), scoped to this
   picker/quiz UI only; the rest of the site (incl. the revealed result
   panels below) stays on the site's pink accent by design. */
.choose-quiz {
  max-width: 640px;
  margin: 0 auto;
}
.choose-quiz[hidden] { display: none; }
.quiz-profile-label {
  font-size: 13px;
  font-weight: 600;
  color: #5c9100;
  margin: 0 0 18px;
}
.quiz-progress { margin-bottom: 28px; }
.quiz-progress-track {
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: var(--panel);
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: #76b900;
  border-radius: 4px;
  width: 33.33%;
  transition: width 0.35s ease;
}
.quiz-progress-label {
  margin-top: 10px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.quiz-question[hidden] { display: none; }
.quiz-question {
  animation: quizFadeIn 0.35s ease both;
}
@keyframes quizFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.quiz-question h3 {
  font-size: 24px;
  margin: 0 0 22px;
}
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
}
.quiz-option:hover {
  border-color: #76b900;
  background: rgba(118,185,0,0.06);
  transform: translateX(4px);
}
.quiz-option-title { display: block; font-weight: 700; font-size: 15.5px; }
.quiz-option-desc { display: block; margin-top: 3px; font-size: 12.5px; font-weight: 400; color: var(--ink-soft); }

/* Loading */
.choose-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 70px 0;
  text-align: center;
}
.choose-loading[hidden] { display: none; }
.choose-loading p {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-soft);
}
.choose-spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--panel);
  border-top-color: #76b900;
  animation: chooseSpin 0.8s linear infinite;
}
@keyframes chooseSpin {
  to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
  .choose-spinner { animation-duration: 1.6s; }
  .quiz-question { animation: none; }
}

.choose-back-btn { margin-bottom: 28px; }
.choose-card-full[data-panel] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.choose-card-full[data-panel].reveal {
  opacity: 1;
  transform: translateY(0);
}

.model-pick { margin-bottom: 4px; }
.model-pick-top { display: flex; align-items: center; gap: 10px; }
.model-pick-name { font-size: 19px; font-weight: 700; letter-spacing: -0.01em; }
.model-pick-maker { font-size: 12.5px; color: var(--ink-soft); margin-top: 3px; }
.note-box {
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.55;
  margin-top: 16px;
}

/* clusters */
.cluster-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin: 40px 0; }
@media (max-width: 768px) { .cluster-compare, .explainer-strip { grid-template-columns: 1fr; } }
.compare-col {
  border-radius: var(--radius);
  padding: 26px;
}
.compare-col.good, .compare-col.bad { background: #ffffff; border: 1px solid var(--hairline); }
.compare-photo {
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  display: block;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}
.compare-col h4 { margin-top: 0; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.compare-col ul { padding-left: 20px; margin: 10px 0 0; font-size: 14px; line-height: 1.7; color: var(--ink); }

/* Clusters page: split hero + definition box + dramatic heading */
.hero.hero-split {
  background: var(--white);
  text-align: left;
  padding: 100px 24px 76px;
}
.hero-split-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: 56px;
}
.hero-split-text h1 {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 20px;
  text-align: left;
  color: var(--ink);
}
.hero-split-text h1 .accent { color: var(--accent-dark); }
.hero-split-text p.sub {
  text-align: left;
  margin: 0;
  max-width: 460px;
  font-size: 19px;
}
.hero-split-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-split-visual::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(232,140,165,0.28) 0%, rgba(232,140,165,0) 72%);
  z-index: 0;
}
.hero-split-visual img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 340px;
  border-radius: 26px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.18), 0 8px 22px rgba(0,0,0,0.08);
  display: block;
}
.hero-split-visual svg {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  display: block;
}
.hero-split-visual-product::before {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(232,140,165,0.22) 0%, rgba(232,140,165,0) 70%);
}
.hero-split-visual-product img {
  max-width: 460px;
  border-radius: 0;
  box-shadow: none;
  filter: drop-shadow(0 22px 30px rgba(0,0,0,0.14));
}
@media (max-width: 860px) {
  .hero-split-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-split-text { text-align: center; }
  .hero-split-text h1, .hero-split-text p.sub { text-align: center; margin-left: auto; margin-right: auto; }
  .hero-split-visual { margin-top: 32px; }
}
@media (max-width: 768px) {
  .hero.hero-gradient { padding: 64px 20px 48px; }
  .hero.hero-gradient h1 { font-size: 36px; }
  .hero-split-text h1 { font-size: 34px; }
  .hero:not(.hero-gradient) h1 { font-size: 32px; }
  .hero p.sub { font-size: 16px; }
}

.definition-box {
  background: var(--panel);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius);
  padding: 36px 40px;
  max-width: 820px;
  margin: 0 auto;
}
.definition-box .label { font-size: 16px; margin-bottom: 14px; }
.definition-box p { font-size: 17px; line-height: 1.65; margin: 0; }

.dramatic-title {
  font-size: 46px !important;
  font-weight: 800 !important;
  letter-spacing: -0.02em !important;
}
.dramatic-title .accent { color: var(--accent-dark); }
@media (max-width: 768px) {
  .dramatic-title { font-size: 32px !important; }
}

/* forms */
form.quote-form { display: flex; flex-direction: column; gap: 16px; max-width: 520px; margin: 0 auto; }
form.quote-form label { font-size: 13px; font-weight: 600; color: var(--ink-soft); display: block; margin-bottom: 6px; }
form.quote-form input, form.quote-form select, form.quote-form textarea {
  width: 100%;
  font-size: 15px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  font-family: inherit;
  background: var(--white);
}
form.quote-form input:focus, form.quote-form select:focus { outline: 2px solid var(--accent); border-color: transparent; }
.error-box { background: #fbeeee; border: 1px solid #f3cccc; color: #a12a2a; padding: 12px 16px; border-radius: 10px; font-size: 14px; }
.build-summary-box {
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.6;
}

/* confirmation */
.confirm-box { text-align: center; padding: 60px 24px; max-width: 560px; margin: 0 auto; }
.confirm-number {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--accent-dark);
  background: rgba(232,140,165,0.08);
  border-radius: var(--radius);
  padding: 20px 30px;
  margin: 22px 0;
  display: inline-block;
}

/* requests table */
table.requests-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.requests-table th, table.requests-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--hairline); }
table.requests-table th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); font-weight: 600; }
table.requests-table tr:last-child td { border-bottom: none; }

.compare-table-wrap {
  overflow-x: auto;
  margin: 0 0 40px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}
table.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.compare-table th, table.compare-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--hairline); }
table.compare-table th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-weight: 600;
  background: var(--panel);
}
table.compare-table th.good-header { background: #FDF2F4; color: #1e3a5f; }
table.compare-table th.bad-header { background: #F3F4F6; color: #6B7280; }
table.compare-table tr:last-child td { border-bottom: none; }
table.compare-table td.good-cell { color: #1e3a5f; font-weight: 600; }
table.compare-table td.bad-cell { color: #6B7280; font-weight: 600; background: #F3F4F6; }

.cluster-diagram {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: var(--max);
  margin: 36px auto;
}
.cluster-diagram-panel {
  width: 100%;
  padding: 24px;
  border-radius: var(--radius);
}
.cluster-diagram-panel.panel-good, .cluster-diagram-panel.panel-bad {
  background: #ffffff;
  border: 1px solid var(--hairline);
}
.cluster-diagram-panel svg { width: 100%; height: auto; display: block; }

footer.site {
  border-top: 1px solid var(--hairline);
  margin-top: 40px;
  color: var(--ink-soft);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 56px 0 40px;
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-brand .brand-mini {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 10px;
}
.footer-brand .brand-mini .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.footer-brand p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.55;
  max-width: 260px;
  margin: 0;
}
.footer-col h5 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin: 0 0 14px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 13.5px;
  color: var(--ink-soft);
}
.footer-col a:hover { color: var(--accent-dark); }
.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding: 22px 0;
  text-align: center;
}
.footer-tagline {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.005em;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(0,0,0,0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, background 0.2s ease;
  z-index: 60;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { background: #333; }
.back-to-top svg { width: 20px; height: 20px; }

/* Pulsing brand dot */
@keyframes brand-dot-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}
header.site .brand .dot {
  animation: brand-dot-pulse 2.4s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) {
  header.site .brand .dot { animation: none; }
}

.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 22px; }
.section-actions { display: flex; justify-content: center; margin-top: 26px; }