:root {
  --bg: oklch(0.98 0.008 98);
  --surface: rgba(255, 252, 247, 0.88);
  --surface-strong: rgba(255, 255, 253, 0.96);
  --surface-cool: rgba(243, 246, 251, 0.9);
  --ink: oklch(0.2 0.028 255);
  --muted: oklch(0.5 0.025 255);
  --accent: oklch(0.61 0.16 50);
  --accent-soft: oklch(0.9 0.03 88);
  --accent-deep: oklch(0.36 0.09 254);
  --line: rgba(24, 36, 56, 0.1);
  --line-strong: rgba(24, 36, 56, 0.18);
  --shadow: 0 20px 60px rgba(28, 36, 52, 0.07);
  --max-copy: 62ch;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(216, 137, 73, 0.11), transparent 22%),
    radial-gradient(circle at 100% 10%, rgba(124, 144, 184, 0.12), transparent 20%),
    linear-gradient(180deg, #fcfaf5 0%, #f4f1eb 100%);
  font-family: "IBM Plex Sans", sans-serif;
  font-kerning: normal;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.58), transparent 24rem),
    radial-gradient(circle at 16% 4%, rgba(255, 255, 255, 0.6), transparent 18%);
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 4.5rem;
}

.page-shell-detail {
  width: min(1080px, calc(100% - 2rem));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.2rem;
  padding: 0.95rem 1.15rem;
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 20px;
  background: rgba(255, 252, 247, 0.82);
  box-shadow: 0 10px 24px rgba(24, 36, 56, 0.05);
  backdrop-filter: blur(10px);
}

.brandmark,
.topbar a {
  color: var(--ink);
  text-decoration: none;
}

.brandmark {
  font-family: "Sora", "IBM Plex Sans", sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: color-mix(in srgb, var(--ink) 92%, black 8%);
}

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

.topbar-links a {
  color: color-mix(in srgb, var(--ink) 70%, white 30%);
  font-size: 0.98rem;
  font-weight: 500;
}

.topbar-links a:hover,
.support-link:hover,
.support-link:focus-visible {
  color: var(--ink);
}

.hero,
.section {
  position: relative;
  z-index: 1;
  margin-bottom: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero {
  overflow: hidden;
  padding: clamp(1.35rem, 3vw, 2.4rem);
  background:
    linear-gradient(135deg, rgba(255, 253, 248, 0.96), rgba(250, 247, 241, 0.9)),
    var(--surface);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
}

.hero::before {
  inset: 1.35rem 1.35rem auto auto;
  width: 240px;
  height: 120px;
  border-top: 1px solid rgba(118, 137, 173, 0.18);
  border-right: 1px solid rgba(118, 137, 173, 0.18);
  border-radius: 0 22px 0 0;
  opacity: 0.8;
}

.hero::after {
  inset: auto -6% -18% auto;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(142, 159, 194, 0.15), transparent 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(360px, 0.86fr);
  gap: clamp(0.9rem, 1.2vw, 1.3rem);
  align-items: start;
}

.hero-copyblock {
  max-width: 43rem;
  display: grid;
  gap: 1rem;
}

.eyebrow,
.section-kicker,
.panel-label {
  margin: 0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent);
}

h1,
h2,
h3,
summary {
  font-family: "Sora", "IBM Plex Sans", sans-serif;
  font-weight: 700;
  letter-spacing: -0.05em;
}

h1 {
  max-width: 10.8ch;
  margin: 0;
  font-size: clamp(2.85rem, 5.45vw, 4.95rem);
  line-height: 0.94;
  text-wrap: balance;
}

.headline-break {
  display: block;
}

.hero-copy,
.section-intro p,
.panel-text,
.release-note p,
.scenario-card p,
.support-card p,
.faq-list p,
#result-summary,
table,
label span,
select,
button {
  font-size: 1rem;
  line-height: 1.7;
}

h2 {
  line-height: 1.02;
}

h3,
summary {
  letter-spacing: -0.03em;
}

.hero-copy {
  max-width: 57ch;
  margin: 0;
  color: var(--muted);
  text-wrap: pretty;
}

.hero-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.hero-mini-card {
  padding: 1rem 1.05rem;
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 20px;
  background: rgba(249, 250, 252, 0.78);
}

.hero-mini-card p:last-child {
  margin: 0.15rem 0 0;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.hero-keywords span {
  padding: 0.36rem 0.68rem;
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 999px;
  background: rgba(245, 247, 250, 0.78);
  color: var(--accent-deep);
  font-size: 0.88rem;
}

.hero-rail {
  display: grid;
  gap: 0.9rem;
  padding: 0.9rem 0 0;
}

.hero-note,
.hero-spectrum,
.result-footnote {
  padding: 1.15rem 1.15rem;
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(252, 253, 255, 0.96), rgba(244, 246, 250, 0.9));
}

.rail-quote {
  margin: 0;
  color: var(--ink);
  font-size: 1.03rem;
  line-height: 1.72;
}

.spectrum-row {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 0.8rem;
  padding: 0.88rem 0;
  border-top: 1px solid rgba(24, 36, 56, 0.08);
}

.spectrum-row:first-of-type {
  border-top: 0;
  padding-top: 0.15rem;
}

.spectrum-row strong {
  font-size: 1.1rem;
  color: var(--accent-deep);
}

.spectrum-row span {
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.9rem 1.25rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(16, 26, 42, 0.12);
}

.button-primary {
  background: linear-gradient(135deg, rgba(23, 37, 61, 0.98), rgba(34, 55, 86, 0.98));
  color: #fffaf2;
}

.button-secondary {
  color: var(--ink);
  background: rgba(245, 247, 250, 0.84);
}

.button-full {
  width: 100%;
  cursor: pointer;
}

.hero-panels,
.release-grid,
.use-case-grid,
.support-grid,
.picker-layout,
.model-glance {
  display: grid;
  gap: 1rem;
}

.trend-card,
.release-note,
.scenario-card,
.support-card,
.glance-item,
.picker-form,
.result-card {
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 22px;
  background: var(--surface-strong);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.62);
}

.trend-card,
.release-note,
.scenario-card,
.support-card,
.glance-item,
.result-card {
  padding: 1.3rem;
}

.support-link {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.support-link:hover,
.support-link:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px rgba(17, 25, 42, 0.08);
  border-color: rgba(17, 25, 42, 0.18);
}

.section {
  padding: clamp(1.55rem, 2.6vw, 2.5rem);
}

.section:nth-of-type(even) {
  background:
    linear-gradient(180deg, rgba(250, 252, 255, 0.96), rgba(246, 247, 249, 0.9)),
    var(--surface);
}

.detail-page {
  display: grid;
  gap: 1.5rem;
}

.detail-hero {
  padding-top: clamp(2rem, 4vw, 3.2rem);
}

.detail-lead {
  max-width: var(--max-copy);
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.section-intro {
  max-width: var(--max-copy);
  margin-bottom: 1.4rem;
}

.section-intro h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 0.96;
  text-wrap: balance;
}

.section-intro p {
  margin: 0;
  color: var(--muted);
}

.release-grid,
.use-case-grid,
.support-grid,
.model-glance {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.support-grid-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.release-grid-signal {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.release-note-lead {
  background:
    linear-gradient(180deg, rgba(255, 251, 244, 0.98), rgba(248, 243, 234, 0.92));
}

.release-note h3,
.scenario-card h3,
.support-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.45rem;
}

.model-glance {
  margin-bottom: 1rem;
}

.glance-item {
  padding: 1rem 1.05rem;
  background: rgba(248, 250, 253, 0.82);
}

.glance-label {
  margin: 0 0 0.35rem;
  color: var(--accent-deep);
  font-weight: 700;
}

.glance-item p:last-child {
  margin: 0;
  color: var(--muted);
}

.article-layout {
  display: grid;
  gap: 1.2rem;
}

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

.article-stack {
  display: grid;
  gap: 1rem;
}

.detail-block {
  padding-top: 1rem;
  border-top: 1px solid rgba(17, 25, 42, 0.1);
}

.detail-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.detail-block h3 {
  margin: 0 0 0.45rem;
  font-size: 1.45rem;
}

.detail-block p {
  max-width: var(--max-copy);
  margin: 0;
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(249, 251, 254, 0.78);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: transparent;
}

th,
td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.91rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.picker-layout {
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
  gap: 1.2rem;
}

.picker-form {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  background: linear-gradient(180deg, rgba(254, 254, 254, 0.98), rgba(245, 247, 251, 0.95));
}

label {
  display: grid;
  gap: 0.45rem;
}

select {
  appearance: none;
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid rgba(17, 25, 42, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-family: "IBM Plex Sans", sans-serif;
}

select:focus-visible,
.button:focus-visible,
.topbar a:focus-visible,
.brandmark:focus-visible,
summary:focus-visible {
  outline: 2px solid rgba(183, 93, 39, 0.7);
  outline-offset: 3px;
}

.result-stack {
  display: grid;
  gap: 1rem;
}

.result-card h3 {
  margin: 0;
  font-size: 2.4rem;
}

#result-summary {
  color: var(--muted);
}

.result-points {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--ink);
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

details {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(24, 36, 56, 0.08);
  border-radius: 20px;
  background: rgba(250, 252, 255, 0.86);
}

summary {
  cursor: pointer;
  font-size: 1.08rem;
  font-weight: 600;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

details p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

#result-card[data-model="e2b"] {
  background: linear-gradient(180deg, rgba(252, 253, 255, 0.98), rgba(239, 244, 250, 0.94));
}

#result-card[data-model="e4b"] {
  background: linear-gradient(180deg, rgba(255, 253, 249, 0.98), rgba(245, 240, 231, 0.94));
}

#result-card[data-model="g26b"] {
  background: linear-gradient(180deg, rgba(248, 251, 252, 0.98), rgba(234, 239, 243, 0.94));
}

#result-card[data-model="g31b"] {
  background: linear-gradient(180deg, rgba(244, 245, 249, 0.98), rgba(232, 233, 240, 0.94));
}

@media (max-width: 900px) {
  .hero-grid,
  .release-grid,
  .use-case-grid,
  .support-grid,
  .support-grid-three,
  .support-grid-four,
  .picker-layout,
  .model-glance,
  .release-grid-signal,
  .article-two-up {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.2rem;
  }

  h1 {
    max-width: 100%;
  }

  .hero-mini-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero,
  .section {
    animation: rise 520ms ease both;
  }

  .section:nth-of-type(2) {
    animation-delay: 80ms;
  }

  .section:nth-of-type(3) {
    animation-delay: 140ms;
  }

  .section:nth-of-type(4) {
    animation-delay: 200ms;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}