@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --background: oklch(0.985 0.006 236);
  --background-soft: oklch(0.972 0.014 232);
  --foreground: oklch(0.27 0.03 247);
  --foreground-soft: oklch(0.47 0.03 238);
  --line: oklch(0.89 0.02 236);
  --card: oklch(0.998 0.003 240 / 0.94);
  --card-strong: oklch(0.982 0.01 236);
  --primary: oklch(0.42 0.15 252);
  --primary-ink: oklch(0.985 0.01 240);
  --secondary: oklch(0.68 0.12 214);
  --accent: oklch(0.74 0.12 177);
  --signal: oklch(0.69 0.11 70);
  --shadow-soft: 0 24px 60px oklch(0.32 0.08 247 / 0.08);
  --shadow-hover: 0 28px 80px oklch(0.32 0.08 247 / 0.12);
  --radius: 1.35rem;
  --container: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(circle at top left, oklch(0.88 0.06 252 / 0.22), transparent 28%),
    radial-gradient(circle at 92% 4%, oklch(0.9 0.07 190 / 0.22), transparent 22%),
    linear-gradient(180deg, var(--background) 0%, var(--background-soft) 100%);
  color: var(--foreground);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, transparent 0, transparent calc(100% - 1px), oklch(0.88 0.015 236 / 0.45) calc(100% - 1px));
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.28), transparent 88%);
  opacity: 0.14;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

.site-shell {
  min-height: 100vh;
  position: relative;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid color-mix(in oklab, var(--line) 78%, transparent);
  background: color-mix(in oklab, var(--background) 84%, white 16%);
  backdrop-filter: blur(16px);
}

.topbar-inner {
  min-height: 4.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.brand img {
  height: 2.65rem;
  width: auto;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
}

.brand-copy strong {
  font-size: 1rem;
  letter-spacing: -0.03em;
}

.brand-copy span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--foreground-soft);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.topnav a {
  text-decoration: none;
  padding: 0.62rem 0.92rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--foreground-soft);
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  background: color-mix(in oklab, var(--primary) 10%, white);
  color: var(--foreground);
  outline: none;
  transform: translateY(-1px);
}

.topnav a.current {
  background: var(--foreground);
  color: var(--primary-ink);
}

.hero {
  position: relative;
  padding: clamp(4rem, 9vw, 7rem) 0 3rem;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 1rem auto auto 0;
  width: min(42vw, 34rem);
  height: min(42vw, 34rem);
  border-radius: 50%;
  background: radial-gradient(circle, oklch(0.78 0.1 250 / 0.16), transparent 68%);
  filter: blur(10px);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.85fr);
  gap: 2.6rem;
  align-items: end;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}

.eyebrow::before {
  content: "";
  width: 2.75rem;
  height: 1px;
  background: currentColor;
}

.hero-copy h1,
.section-head h2,
.card-title,
.detail-title,
.tool-card h3,
.related-card h3,
.navigator h2 {
  font-family: "Manrope", sans-serif;
  font-weight: 800;
}

.hero-copy h1 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(2.8rem, 6vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.hero-copy p {
  margin: 1.5rem 0 0;
  max-width: 48rem;
  color: var(--foreground-soft);
  font-size: clamp(1.06rem, 1.7vw, 1.18rem);
  line-height: 1.92;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 1.6rem;
  border: 1px solid color-mix(in oklab, var(--line) 92%, white);
  border-radius: var(--radius);
  background:
    linear-gradient(155deg, color-mix(in oklab, var(--primary) 7%, white), color-mix(in oklab, var(--accent) 5%, white)),
    var(--card);
  box-shadow: var(--shadow-soft);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto -10% -35% auto;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in oklab, var(--accent) 40%, transparent), transparent 70%);
}

.panel-label {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}

.panel-copy {
  position: relative;
  z-index: 1;
  margin: 0.95rem 0 0;
  color: var(--foreground-soft);
  line-height: 1.9;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.metric {
  padding: 1rem 1.05rem;
  border-radius: 1rem;
  border: 1px solid color-mix(in oklab, var(--line) 85%, white);
  background: color-mix(in oklab, white 72%, var(--background));
}

.metric strong {
  display: block;
  font-size: 1.25rem;
  letter-spacing: -0.04em;
}

.metric span {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--foreground-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.signal-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.45rem;
}

.signal-chip,
.theme-chip,
.meta-chip,
.tool-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.signal-chip,
.tool-chip {
  border: 1px solid color-mix(in oklab, var(--line) 88%, white);
  background: color-mix(in oklab, white 82%, var(--background));
  color: var(--foreground-soft);
}

.page {
  padding: 2.4rem 0 5.5rem;
}

.intro-band {
  margin-bottom: 2.3rem;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 24rem);
  gap: 2rem;
  align-items: start;
}

.hub-layout {
  display: grid;
  grid-template-columns: minmax(16rem, 17.5rem) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.navigator,
.detail-sidebar,
.tool-card,
.qa-card,
.article-card,
.related-card,
.pager a {
  border: 1px solid color-mix(in oklab, var(--line) 90%, white);
  border-radius: var(--radius);
  background: linear-gradient(180deg, color-mix(in oklab, white 92%, var(--background)) 0%, color-mix(in oklab, white 72%, var(--background)) 100%);
  box-shadow: var(--shadow-soft);
}

.navigator,
.detail-sidebar {
  position: sticky;
  top: 6.2rem;
  padding: 1.5rem;
}

.navigator h2,
.detail-sidebar h2,
.section-head h2 {
  margin: 0;
  font-size: clamp(1.85rem, 3vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.navigator p,
.section-head p,
.tool-card p,
.deck,
.answer-copy p,
.sidebar-copy,
.related-card p,
.pager strong,
.breadcrumbs,
.note-list li {
  color: var(--foreground-soft);
  line-height: 1.9;
}

.navigator p,
.section-head p,
.sidebar-copy {
  margin: 1rem 0 0;
}

.tool-stack,
.nav-list,
.detail-list,
.related-grid,
.tool-grid,
.pager {
  display: grid;
  gap: 1rem;
}

.tool-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 2rem 0 0;
}

.tool-card {
  padding: 1.35rem;
}

.tool-card h3 {
  margin: 0.55rem 0 0;
  font-size: 1.4rem;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.tool-card p {
  margin: 0.85rem 0 0;
}

.nav-list {
  margin-top: 1.35rem;
  max-height: min(60vh, 34rem);
  overflow: auto;
  padding-right: 0.2rem;
}

.detail-list {
  max-height: min(52vh, 30rem);
  overflow: auto;
  padding-right: 0.2rem;
}

.nav-item {
  display: grid;
  gap: 0.6rem;
  padding: 1.1rem 1.1rem;
  border-radius: 1.05rem;
  text-decoration: none;
  background: color-mix(in oklab, white 70%, var(--background));
  border: 1px solid transparent;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.nav-item:hover,
.nav-item:focus-visible,
.nav-item.current,
.detail-link:hover,
.detail-link:focus-visible,
.detail-link.current {
  transform: translateY(-1px);
  border-color: color-mix(in oklab, var(--secondary) 45%, white);
  box-shadow: 0 18px 36px oklch(0.36 0.08 247 / 0.08);
  outline: none;
}

.nav-meta,
.card-meta,
.detail-meta,
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.q-pill,
.meta-chip,
.theme-chip {
  min-height: 2rem;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.q-pill,
.meta-chip {
  background: color-mix(in oklab, var(--primary) 12%, white);
  color: var(--primary);
}

.theme-chip {
  background: color-mix(in oklab, var(--accent) 18%, white);
  color: color-mix(in oklab, var(--accent) 68%, black 32%);
}

.nav-title,
.detail-link strong {
  font-size: 1rem;
  line-height: 1.45;
}

.hub-main {
  display: grid;
  gap: 1.85rem;
}

.section-head {
  display: grid;
  gap: 1rem;
}

.intro-band .section-head {
  max-width: 42rem;
}

.intro-visual {
  display: grid;
  gap: 1rem;
}

.photo-card,
.compat-card,
.visual-side,
.sidebar-visual {
  border: 1px solid color-mix(in oklab, var(--line) 90%, white);
  border-radius: var(--radius);
  background: linear-gradient(180deg, color-mix(in oklab, white 92%, var(--background)) 0%, color-mix(in oklab, white 72%, var(--background)) 100%);
  box-shadow: var(--shadow-soft);
}

.photo-card {
  position: relative;
  overflow: hidden;
  min-height: 16rem;
  margin: 0;
}

.photo-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-caption {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: 1rem 1.1rem;
  background: linear-gradient(180deg, transparent, oklch(0.2 0.03 247 / 0.82));
  color: oklch(0.98 0.01 240);
  font-size: 0.95rem;
  line-height: 1.55;
}

.compat-card,
.sidebar-visual {
  padding: 1rem 1.1rem 1.15rem;
}

.cassette-strip {
  display: flex;
  align-items: end;
  gap: 0.45rem;
  margin-top: 0.9rem;
}

.cassette-strip.compact {
  margin-top: 0.8rem;
}

.cassette {
  position: relative;
  flex: 1;
  min-width: 1.9rem;
  height: 5.3rem;
  border-radius: 0.55rem 0.55rem 0.35rem 0.35rem;
  border: 1px solid oklch(0.25 0.02 250 / 0.16);
  box-shadow: inset 0 -10px 18px oklch(0.2 0.02 247 / 0.14);
}

.cassette::before {
  content: "";
  position: absolute;
  inset: 0.3rem auto auto 50%;
  width: 0.6rem;
  height: 0.14rem;
  transform: translateX(-50%);
  border-radius: 999px;
  background: oklch(0.97 0.01 240 / 0.55);
}

.cassette-label {
  position: absolute;
  inset: auto 0 0.45rem 0;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: oklch(0.97 0.01 240);
}

.cassette-10 { background: linear-gradient(180deg, #22282d, #14181c); }
.cassette-8 { background: linear-gradient(180deg, #355b93, #284978); }
.cassette-7 { background: linear-gradient(180deg, #1b5678, #133f59); }
.cassette-6 { background: linear-gradient(180deg, #13887d, #0d655d); }
.cassette-5 { background: linear-gradient(180deg, #358647, #266335); }
.cassette-4 { background: linear-gradient(180deg, #768b22, #5b6b19); }
.cassette-3 { background: linear-gradient(180deg, #e47126, #bb5115); }
.cassette-2 { background: linear-gradient(180deg, #c84d43, #9f3931); }
.cassette-1 { background: linear-gradient(180deg, #7b5f95, #614877); }

.section-head h2 {
  max-width: 22ch;
  font-size: clamp(2rem, 3.3vw, 3rem);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.35rem;
}

.qa-card {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 1.15rem;
  padding: 1.65rem;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.qa-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, color-mix(in oklab, var(--primary) 7%, transparent), transparent 48%);
  opacity: 0.8;
  pointer-events: none;
}

.qa-card:hover,
.qa-card:focus-visible,
.related-card:hover,
.related-card:focus-visible,
.pager a:hover,
.pager a:focus-visible {
  transform: translateY(-3px);
  border-color: color-mix(in oklab, var(--secondary) 40%, white);
  box-shadow: var(--shadow-hover);
  outline: none;
}

.qa-card.featured {
  grid-column: span 2;
  min-height: 0;
  grid-template-columns: 1fr;
  align-items: start;
}

.card-copy,
.card-side {
  position: relative;
  z-index: 1;
}

.card-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.55;
  letter-spacing: -0.05em;
  font-weight: 800;
}

.qa-card:not(.featured) .card-title {
  font-size: 1.05rem;
}

.deck {
  margin: 0;
  max-width: 44rem;
  font-size: 1.05rem;
}

.card-side {
  padding: 1.15rem 1.2rem;
  border-radius: 1.1rem;
  background: color-mix(in oklab, white 72%, var(--background));
  border: 1px solid color-mix(in oklab, var(--line) 90%, white);
  max-width: 34rem;
}

.card-side p {
  margin: 0.8rem 0 0;
  color: var(--foreground-soft);
  line-height: 1.9;
}

.visual-note {
  margin: 0.75rem 0 0;
  color: var(--foreground-soft);
  line-height: 1.8;
}

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--primary);
}

.detail-hero .hero-copy h1 {
  max-width: none;
  font-size: clamp(2.25rem, 4.2vw, 3.7rem);
  line-height: 1.08;
}

.detail-hero .hero-grid {
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.7fr);
  gap: 2.2rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 20rem);
  gap: 1.8rem;
  align-items: start;
}

.article-card {
  padding: 1.75rem;
}

.breadcrumbs {
  margin-bottom: 1.2rem;
  font-size: 0.92rem;
}

.breadcrumbs a {
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
}

.article-header {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid color-mix(in oklab, var(--line) 90%, white);
}

.detail-title {
  margin: 0.95rem 0 0;
  font-size: clamp(1.85rem, 3vw, 2.7rem);
  line-height: 1.12;
  letter-spacing: -0.05em;
}

.lead {
  margin: 1.1rem 0 0;
  color: var(--foreground-soft);
  font-size: 1.08rem;
  line-height: 1.95;
}

.answer-shell {
  margin-top: 1.7rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1.35rem;
}

.answer-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: color-mix(in oklab, var(--primary) 12%, white);
  color: var(--primary);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.answer-copy {
  position: relative;
  display: grid;
  gap: 1.25rem;
  padding-left: 1.35rem;
}

.answer-copy::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, color-mix(in oklab, var(--primary) 50%, white), color-mix(in oklab, var(--accent) 45%, white));
}

.answer-copy p {
  margin: 0;
  font-size: 1.06rem;
}

.detail-sidebar {
  display: grid;
  gap: 1.2rem;
}

.sidebar-block {
  display: grid;
  gap: 0.95rem;
}

.sidebar-title {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: -0.04em;
}

.sidebar-copy {
  margin: 0;
}

.detail-list {
  gap: 0.7rem;
}

.detail-link {
  display: grid;
  gap: 0.5rem;
  padding: 1rem 1rem;
  border-radius: 1rem;
  text-decoration: none;
  background: color-mix(in oklab, white 72%, var(--background));
  border: 1px solid transparent;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.related-section {
  margin-top: 2.25rem;
}

.related-heading {
  margin: 0 0 1.15rem;
  font-size: clamp(1.65rem, 2.6vw, 2.2rem);
  letter-spacing: -0.05em;
}

.related-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-card {
  display: grid;
  gap: 0.9rem;
  padding: 1.2rem;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.pager {
  margin-top: 1.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pager a,
.pager div {
  min-height: 100%;
}

.pager a {
  display: grid;
  gap: 0.45rem;
  padding: 1.15rem 1.2rem;
  text-decoration: none;
}

.pager span {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
}

.note-list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.55rem;
}

.footer {
  border-top: 1px solid color-mix(in oklab, var(--line) 90%, white);
  padding: 1.5rem 0 2.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--foreground-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
}

.footer-links a {
  text-decoration: none;
}

@media (max-width: 1140px) {
  .intro-band,
  .hub-layout,
  .article-layout,
  .tool-grid,
  .related-grid,
  .hero-grid,
  .detail-hero .hero-grid {
    grid-template-columns: 1fr;
  }

  .navigator,
  .detail-sidebar {
    position: static;
  }

  .qa-card.featured {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar-inner {
    padding: 0.95rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .card-grid,
  .metrics,
  .related-grid,
  .pager {
    grid-template-columns: 1fr;
  }

  .qa-card.featured {
    grid-column: auto;
  }

  .answer-shell {
    grid-template-columns: 1fr;
  }

  .answer-copy {
    padding-left: 0;
  }

  .answer-copy::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .qa-card,
  .nav-item,
  .detail-link,
  .related-card,
  .pager a,
  .topnav a {
    transition: none;
  }
}