:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --surface-ink: #0f1720;
  --surface-soft: #f1f5fd;
  --text: #102033;
  --text-muted: #64748b;
  --line: #e2e8f0;
  --line-strong: rgba(16, 32, 51, 0.1);
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.09);
  --success: #059669;
  --warning: #b45309;
  --danger: #b91c1c;
  --shadow-lg: 0 18px 36px rgba(15, 23, 42, 0.07);
  --shadow-md: 0 10px 24px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.04);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --content-max: 1440px;
  --panel-gap: 26px;
  --section-space: clamp(48px, 6vw, 72px);
  --section-padding: clamp(24px, 4vw, 36px);
  --grid-step: 24px;
  --transition: 220ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.06), transparent 28%),
    radial-gradient(circle at top right, rgba(5, 150, 105, 0.04), transparent 20%),
    var(--bg);
  color: var(--text);
  font-family: "Noto Sans SC", "Plus Jakarta Sans", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.12)),
    linear-gradient(90deg, rgba(16, 32, 51, 0.016) 1px, transparent 1px),
    linear-gradient(rgba(16, 32, 51, 0.016) 1px, transparent 1px);
  background-size: auto, 160px 160px, 160px 160px;
  pointer-events: none;
}

.page-glow,
.grid-noise,
.scroll-progress {
  pointer-events: none;
  position: fixed;
}

.page-glow {
  width: 28rem;
  height: 28rem;
  filter: blur(88px);
  opacity: 0.24;
  border-radius: 999px;
}

.page-glow-a {
  top: -8rem;
  left: -7rem;
  background: rgba(37, 99, 235, 0.12);
}

.page-glow-b {
  right: -10rem;
  top: 20rem;
  background: rgba(5, 150, 105, 0.08);
}

.grid-noise {
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.06)),
    radial-gradient(rgba(16, 32, 51, 0.02) 1px, transparent 1px);
  background-size: auto, 18px 18px;
  opacity: 0.24;
}

.scroll-progress {
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 40;
  background: rgba(16, 32, 51, 0.06);
}

.scroll-progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #1f8f84);
}

.hero,
.experience-shell {
  width: min(calc(100% - 40px), var(--content-max));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.hero {
  padding: clamp(40px, 6vw, 72px) 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
  gap: 24px;
  align-items: stretch;
}

.hero-copy,
.hero-board,
.panel,
.nav-frame {
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  background: var(--surface);
}

.hero-copy {
  border-radius: var(--radius-xl);
  padding: clamp(24px, 4vw, 48px);
  min-height: 460px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-strong);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

.hero h1,
.panel h2 {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Noto Sans SC", sans-serif;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.hero h1 {
  max-width: 13ch;
  font-size: clamp(2.8rem, 4.7vw, 4.9rem);
  line-height: 1.02;
  text-wrap: balance;
}

.hero-summary,
.panel-head p {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.9vw, 1.16rem);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
  cursor: pointer;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--surface-ink);
  color: #fff;
  border-color: transparent;
}

.button-secondary {
  color: var(--text);
  background: #fff;
}

.button:focus-visible,
.nav-link:focus-visible {
  outline: 3px solid rgba(29, 78, 216, 0.22);
  outline-offset: 3px;
}

.hero-board {
  border-radius: var(--radius-xl);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-board-top {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, #22c55e, #15803d);
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.12);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.hero-metrics-compact .metric-card {
  min-height: 112px;
}

.metric-card,
.problem-card,
.scope-card,
.module-card,
.grade-card,
.tag-panel,
.output-card,
.compare-card,
.handoff-card,
.acceptance-card,
.rating-quote,
.closing-statement {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.metric-card {
  padding: 18px;
  display: grid;
  gap: 8px;
  background: #f8fafc;
}

.metric-card strong {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.metric-card span,
.hero-note p,
.hero-note strong {
  color: var(--text-muted);
}

.hero-note {
  margin-top: auto;
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 32, 51, 0.94), rgba(16, 32, 51, 0.88));
}

.hero-note p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.66);
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

.hero-note strong {
  color: #fff;
  font-size: 1.05rem;
}

.experience-shell {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 48px;
}

.section-nav {
  position: sticky;
  top: 24px;
  align-self: start;
}

.nav-frame {
  border-radius: var(--radius-lg);
  padding: 16px;
}

.nav-title {
  margin: 4px 0 12px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.nav-link {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-muted);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--surface-ink);
  background: rgba(16, 32, 51, 0.06);
  transform: translateX(2px);
}

.content-stack {
  display: grid;
  gap: var(--section-space);
}

.experience-shell-wide {
  grid-template-columns: 290px minmax(0, 1fr);
}

.panel {
  border-radius: var(--radius-xl);
  padding: var(--section-padding);
}

.panel-head {
  margin-bottom: 24px;
}

.panel-head h2 {
  font-size: clamp(2rem, 3.6vw, 3.3rem);
}

.flow-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.flow-step {
  padding: 16px;
  border-radius: var(--radius-md);
  background: #f8fafc;
  border: 1px solid var(--line);
  min-height: 170px;
}

.flow-step span,
.problem-index,
.module-count,
.compare-card header span,
.acceptance-card strong {
  display: inline-flex;
  width: fit-content;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--accent-strong);
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
}

.flow-step strong,
.problem-card h3,
.scope-card h3,
.module-copy h3,
.grade-card h3,
.tag-panel h3,
.compare-card h3,
.handoff-card h3 {
  display: block;
  margin-top: 14px;
  font-size: 1.08rem;
}

.flow-step p,
.problem-card p,
.scope-card li,
.module-copy p,
.grade-card p,
.tag-panel,
.compare-card dd,
.compare-card p,
.handoff-card p,
.acceptance-card p,
.output-row span,
.closing-statement p {
  color: var(--text-muted);
}

.problem-grid,
.scope-grid,
.grade-grid,
.tag-panels,
.compare-grid,
.handoff-grid,
.acceptance-grid {
  display: grid;
  gap: 14px;
}

.problem-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.problem-card,
.scope-card,
.acceptance-card {
  padding: 18px;
}

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

.scope-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.scope-card-primary {
  background: linear-gradient(180deg, rgba(16, 32, 51, 0.98), rgba(16, 32, 51, 0.9));
}

.scope-card-primary h3,
.scope-card-primary li {
  color: #fff;
}

.scope-card-primary li {
  opacity: 0.88;
}

.module-timeline {
  display: grid;
  gap: 12px;
}

.module-card {
  padding: 18px;
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  align-items: center;
}

.module-count {
  width: 68px;
  height: 68px;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.module-card-highlight {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(241, 245, 253, 1));
  border-color: rgba(37, 99, 235, 0.16);
}

.micro-bars {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.micro-bars span {
  display: block;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(29, 78, 216, 0.6), rgba(15, 118, 110, 0.55));
}

.panel-emphasis {
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at left center, rgba(5, 150, 105, 0.1), transparent 30%),
    linear-gradient(180deg, #0f1720, #121f31);
  color: #fff;
}

.panel-head-invert p,
.panel-head-invert .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

.rating-layout {
  display: grid;
  gap: 16px;
}

.rating-quote {
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

.rating-quote p,
.output-title {
  margin: 0 0 10px;
  color: rgba(255, 255, 255, 0.7);
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

.rating-quote strong,
.output-row strong,
.closing-statement strong {
  font-size: 1.08rem;
  line-height: 1.5;
}

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

.grade-card,
.tag-panel,
.output-card {
  padding: 18px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.grade-card span {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.06em;
}

.grade-card h3,
.grade-card p,
.tag-panel h3,
.tag-panel span,
.output-row span,
.output-row strong {
  color: #fff;
}

.tag-panels {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud span {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.92rem;
}

.tag-cloud-risk span {
  background: rgba(185, 28, 28, 0.14);
}

.output-card {
  display: grid;
  gap: 10px;
}

.output-row {
  display: grid;
  gap: 6px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.output-row:first-of-type {
  border-top: 0;
}

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

.compare-card {
  padding: 18px;
}

.compare-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.compare-type {
  margin: 14px 0;
  font-weight: 600;
  color: var(--surface-ink);
}

.compare-card dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.compare-card dt {
  margin-bottom: 4px;
  font-weight: 700;
}

.compare-card-focus {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 1));
  border-color: rgba(37, 99, 235, 0.16);
}

.handoff-grid {
  grid-template-columns: 1.15fr 1fr;
}

.handoff-card {
  padding: 18px;
}

.handoff-flow {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.handoff-flow span {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(16, 32, 51, 0.04);
}

.handoff-flow i {
  width: 1px;
  height: 18px;
  display: block;
  margin: 0 auto;
  background: rgba(16, 32, 51, 0.12);
}

.field-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.field-list span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--surface-ink);
}

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

.statement-block {
  display: grid;
  gap: 12px;
}

.statement-block p {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f8fafc;
  color: var(--surface-ink);
  font-weight: 500;
}

.data-table {
  display: grid;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.data-table-dark {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
}

.data-table-spaced {
  margin-top: 18px;
}

.data-row {
  display: grid;
  grid-template-columns: minmax(160px, 0.8fr) minmax(0, 1.8fr);
}

.data-row-3 {
  grid-template-columns: minmax(160px, 0.8fr) minmax(0, 1.8fr) minmax(180px, 0.9fr);
}

.data-row-4 {
  grid-template-columns: minmax(160px, 0.8fr) minmax(90px, 0.45fr) minmax(0, 1.4fr) minmax(0, 1.1fr);
}

.data-row-5 {
  grid-template-columns:
    minmax(110px, 0.55fr)
    minmax(140px, 0.75fr)
    minmax(0, 1.35fr)
    minmax(0, 1.2fr)
    minmax(0, 1.15fr);
}

.data-row span {
  padding: 16px 18px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
}

.data-row span + span {
  border-left: 1px solid var(--line);
}

.data-row.data-head span {
  border-top: 0;
  background: #f8fafc;
  color: var(--surface-ink);
  font-weight: 700;
}

.data-table-dark .data-row span {
  border-top-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.82);
}

.data-table-dark .data-row span + span {
  border-left-color: rgba(255, 255, 255, 0.1);
}

.data-table-dark .data-row.data-head span {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.subsection-block {
  display: grid;
  gap: 14px;
}

.subsection-block + .subsection-block {
  margin-top: 10px;
}

.subsection-block h3 {
  margin: 0;
  font-size: 1.18rem;
  color: #fff;
}

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

.case-preview {
  margin-bottom: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-md);
}

.case-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.output-card-light {
  background: #fff;
  border-color: var(--line);
}

.output-card-light .output-title {
  color: var(--text-muted);
}

.output-card-light .output-row {
  border-top-color: var(--line);
}

.output-card-light .output-row span {
  color: var(--text-muted);
}

.output-card-light .output-row strong {
  color: var(--surface-ink);
}

.closing-statement {
  margin-top: 18px;
  padding: 22px;
  background: linear-gradient(135deg, rgba(16, 32, 51, 0.96), rgba(29, 78, 216, 0.9));
}

.closing-statement p,
.closing-statement strong {
  color: #fff;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 560ms ease, transform 560ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1180px) {
  .hero {
    grid-template-columns: 1fr;
  }

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

  .section-nav {
    position: static;
  }

  .nav-frame {
    display: flex;
    gap: 10px;
    overflow-x: auto;
  }

  .nav-title {
    display: none;
  }

  .nav-link {
    white-space: nowrap;
  }

  .flow-strip,
  .problem-grid,
  .grade-grid,
  .compare-grid,
  .acceptance-grid,
  .grade-grid-wide {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .data-row,
  .data-row-3,
  .data-row-4,
  .data-row-5 {
    grid-template-columns: 1fr;
  }

  .data-row span + span {
    border-left: 0;
  }
}

@media (max-width: 860px) {
  .hero,
  .experience-shell {
    width: min(calc(100% - 24px), var(--content-max));
  }

  .hero-copy {
    min-height: auto;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.4rem, 8.6vw, 4.2rem);
  }

  .hero-metrics,
  .scope-grid,
  .tag-panels,
  .handoff-grid {
    grid-template-columns: 1fr;
  }

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

  .module-count {
    width: fit-content;
    height: auto;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .flow-strip,
  .problem-grid,
  .grade-grid,
  .compare-grid,
  .acceptance-grid,
  .grade-grid-wide {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}