:root {
  --paper: #f6f7f3;
  --paper-deep: #e8ede7;
  --surface: #fffefb;
  --surface-raised: rgba(255, 254, 251, 0.86);
  --surface-2: #f0f4ee;
  --ink: #20241f;
  --ink-soft: #4d544c;
  --muted: #747b71;
  --line: rgba(32, 36, 31, 0.14);
  --line-strong: rgba(32, 36, 31, 0.28);
  --state: #2f766f;
  --state-soft: #e2efec;
  --action: #9b6429;
  --action-soft: #f1dfc9;
  --eval: #365f8d;
  --eval-soft: #e3ebf4;
  --risk: #9b4e43;
  --risk-soft: #f2dfda;
  --shadow: 0 18px 42px rgba(39, 34, 27, 0.08);
  --shadow-soft: 0 10px 26px rgba(39, 34, 27, 0.06);
  --focus: rgba(47, 118, 111, 0.34);
  --font-body: "Sora", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "Geist Mono", "SFMono-Regular", Menlo, monospace;
  --sidebar-w: 188px;
  --content-max: 1120px;
  --desktop-gutter: 2.6rem;
}

*,
*::before,
*::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.8rem;
}

body {
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(32, 29, 25, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(32, 29, 25, 0.03) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button,
input { font: inherit; }

main,
section,
article,
div,
figure,
header,
nav,
p,
h1,
h2,
h3,
span,
strong,
dd,
dt,
a,
button {
  min-width: 0;
}

p,
h1,
h2,
h3,
dd,
span,
a,
button {
  overflow-wrap: break-word;
}

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-160%);
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
  transition: transform 140ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

code {
  display: inline-block;
  max-width: 100%;
  padding: 0.12em 0.38em;
  border: 1px solid rgba(32, 29, 25, 0.08);
  border-radius: 4px;
  background: rgba(32, 29, 25, 0.05);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.88em;
  line-height: 1.35;
  white-space: normal;
  overflow-wrap: anywhere;
}

::selection { background: rgba(47, 118, 111, 0.18); }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-thumb {
  background: rgba(32, 29, 25, 0.22);
  border-radius: 999px;
}

.sidebar {
  display: none;
}

.mobile-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  gap: 0.7rem;
  padding: 0.78rem 1.15rem 0.72rem;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 247, 243, 0.92);
  backdrop-filter: blur(12px);
}

.mobile-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.mobile-section-nav {
  display: flex;
  gap: 0.42rem;
  overflow-x: auto;
  padding-bottom: 0.1rem;
  scrollbar-width: none;
}

.mobile-section-nav::-webkit-scrollbar { display: none; }

.mobile-section-nav a {
  flex: 0 0 auto;
  padding: 0.48rem 0.78rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 254, 251, 0.58);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.2;
}

.mobile-brand,
.sidebar-name,
.sidebar-link,
.btn,
.eyebrow,
.tag,
.meta-label,
.figure-kicker,
.report-kicker,
.paper-lane,
.paper-year,
.text-link,
.text-button {
  font-family: var(--font-mono);
}

.mobile-brand {
  font-size: 0.82rem;
  font-weight: 600;
}

.content-main {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: 2.25rem 1.15rem 5rem;
}

@media (min-width: 1060px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 2.2rem;
    width: var(--sidebar-w);
    min-height: 100vh;
    padding: 2.25rem 1.25rem;
    border-right: 1px solid var(--line);
    background: rgba(246, 247, 243, 0.9);
    backdrop-filter: blur(12px);
  }

  .mobile-header { display: none; }

  .content-main {
    width: min(var(--content-max), calc(100% - var(--sidebar-w) - var(--desktop-gutter) - var(--desktop-gutter)));
    margin-left: calc(var(--sidebar-w) + max(var(--desktop-gutter), calc((100vw - var(--sidebar-w) - var(--content-max)) / 2)));
    margin-right: auto;
    padding: 3.2rem 0 6rem;
  }

  .hero-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.8rem;
  }
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.sidebar-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 7px;
  background: var(--ink);
  color: #fffdf8;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.sidebar-name {
  font-size: 0.84rem;
  font-weight: 600;
}

.sidebar-links {
  display: grid;
  gap: 0.12rem;
}

.sidebar-link {
  padding: 0.62rem 0.7rem;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
  transition: color 140ms, background 140ms;
}

.sidebar-link:hover {
  color: var(--ink);
  background: rgba(32, 29, 25, 0.05);
}

.sidebar-link.active {
  color: var(--ink);
  background: rgba(47, 118, 111, 0.1);
}

.sidebar-utility {
  display: flex;
  gap: 0.5rem;
  margin-top: auto;
}

.sidebar-utility a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.8rem;
  min-height: 2rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  transition: background 140ms, border-color 140ms, color 140ms;
}

.sidebar-utility a:hover {
  border-color: var(--line-strong);
  background: rgba(32, 29, 25, 0.04);
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.55rem;
  padding: 0.68rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 140ms, border-color 140ms, color 140ms;
}

.btn-dark {
  background: var(--ink);
  border-color: var(--ink);
  color: #fffdf8;
}

.btn-dark:hover {
  background: #383028;
  border-color: #383028;
}

.btn-outline {
  background: rgba(251, 250, 246, 0.5);
  border-color: var(--line);
  color: var(--ink);
}

.btn-outline:hover {
  border-color: var(--line-strong);
  background: rgba(251, 250, 246, 0.86);
}

.btn-sm {
  min-height: auto;
  padding: 0.45rem 0.9rem;
  font-size: 0.74rem;
}

.btn-icon {
  gap: 0.55rem;
}

.btn-icon svg {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.55rem;
  align-items: center;
  max-width: var(--content-max);
  margin: 0 auto;
  min-height: 36rem;
  padding: 2.2rem 0 2.9rem;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: var(--content-max);
  min-height: auto;
  padding: 0;
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin-bottom: 1.35rem;
}

.hero-copy > .eyebrow,
.hero-copy > h1,
.hero-copy > .paper-authors,
.hero-copy > .paper-subtitle,
.hero-copy > .paper-actions {
  width: 100%;
  max-width: var(--content-max);
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.7rem;
  padding: 0.24rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 250, 246, 0.55);
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.2;
}

.eyebrow {
  margin-bottom: 0.75rem;
  color: var(--state);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(32px, 5.2vw, 62px);
  line-height: 1.05;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(22px, 2.55vw, 34px);
  line-height: 1.22;
}

h3 {
  font-size: 1rem;
  line-height: 1.35;
}

.paper-subtitle {
  max-width: 47rem;
  margin: 1rem auto 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.8;
}

.paper-authors {
  display: grid;
  gap: 0.32rem;
  max-width: 58rem;
  margin: 1rem auto 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.55;
}

.paper-authors p:first-child {
  color: var(--ink);
  font-weight: 500;
}

.paper-authors p:nth-child(2) {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.paper-authors p:last-child {
  color: rgba(116, 123, 113, 0.64);
  font-size: 0.76rem;
  line-height: 1.4;
}

.paper-authors sup {
  font-size: 0.68em;
  line-height: 0;
  vertical-align: super;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 1.6rem;
}

.thesis-board {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: left;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 254, 251, 0.94), rgba(240, 244, 238, 0.72));
  box-shadow: var(--shadow-soft);
}

.board-header {
  display: grid;
  gap: 0.25rem;
  padding: 0.35rem 0.35rem 0.9rem;
  border-bottom: 1px solid var(--line);
}

.board-header span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.board-header strong {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 600;
}

.coupling-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.4rem;
  padding: 0.85rem 0.35rem 0.2rem;
}

.coupling-rail span {
  position: relative;
  min-height: 2.35rem;
  padding: 0.46rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 254, 251, 0.7);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-transform: uppercase;
}

.coupling-rail span:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -0.42rem;
  z-index: 1;
  width: 0.42rem;
  height: 1px;
  background: var(--line-strong);
}

.formula-ladder {
  display: grid;
  gap: 0.65rem;
  padding-top: 0.9rem;
}

.formula-row {
  display: grid;
  grid-template-columns: 3.8rem minmax(0, 1fr);
  gap: 0.35rem 0.65rem;
  align-items: center;
  padding: 0.78rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.66);
}

.formula-row p {
  grid-column: 2;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.55;
}

.formula-name {
  grid-row: span 2;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
}

.formula-row code {
  width: fit-content;
  color: var(--ink);
  font-size: 0.9rem;
}

.active-row {
  border-color: rgba(47, 118, 111, 0.36);
  background: linear-gradient(180deg, var(--state-soft), rgba(255, 253, 248, 0.78));
}

.active-row .formula-name { color: var(--state); }

.paper-section {
  padding: 3.2rem 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 5rem;
}

.paper-section:last-child { border-bottom: none; }

.section-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 0.7fr) minmax(0, 1.3fr);
  gap: 1.2rem;
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: 1.25rem;
}

.section-note {
  max-width: 46rem;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.75;
}

.paper-section > .section-heading {
  max-width: 760px;
  margin: 0 auto 1.35rem;
  text-align: center;
}

.paper-section > .section-heading .section-note {
  margin-left: auto;
  margin-right: auto;
}

.section-stack {
  max-width: var(--content-max);
  margin: 0 auto;
}

.section-figure {
  margin-top: 1rem;
  max-width: 920px;
}

.overview-figure {
  margin-top: 1.2rem;
}

.definition-figure {
  margin-bottom: 1.4rem;
}

.argument-stack {
  display: grid;
  gap: 0.72rem;
}

.argument-card,
.paradigm-card,
.data-row,
.eval-card,
.report-card,
.explorer-panel,
.paper-card,
.challenge-grid article,
.empty-state {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.78);
}

.argument-card {
  position: relative;
  padding: 1.05rem 1.1rem 1.05rem 4rem;
}

.argument-card::before {
  content: "";
  position: absolute;
  left: 2rem;
  top: 3.15rem;
  bottom: -0.9rem;
  width: 1px;
  background: var(--line);
}

.argument-card:last-child::before { display: none; }

.argument-card.emphasis {
  border-color: rgba(47, 118, 111, 0.34);
  background: linear-gradient(180deg, var(--state-soft), rgba(251, 250, 246, 0.86));
}

.argument-index {
  position: absolute;
  left: 1rem;
  top: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--state);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
}

.argument-card p,
.paradigm-card p,
.data-row p,
.eval-card p,
.challenge-grid p,
.report-body p:not(.report-kicker),
.paper-title {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.62;
}

.storyline {
  position: relative;
  display: grid;
  gap: 1.25rem;
}

.storyline::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 1px;
  background: linear-gradient(180deg, var(--state), var(--action), var(--eval));
}

.story-step {
  position: relative;
  display: grid;
  grid-template-areas: "copy figure";
  grid-template-columns: minmax(17rem, 0.46fr) minmax(0, 1fr);
  gap: 1.15rem;
  padding: 1.05rem 1.05rem 1.05rem 3.1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.74), rgba(247, 243, 234, 0.58)),
    rgba(251, 250, 246, 0.74);
}

.story-step-hero {
  grid-template-columns: minmax(17rem, 0.4fr) minmax(0, 1.08fr);
}

.story-step-reverse {
  grid-template-areas: "figure copy";
  grid-template-columns: minmax(0, 0.96fr) minmax(18rem, 0.48fr);
}

.story-step-definition {
  grid-template-columns: minmax(18rem, 0.52fr) minmax(0, 0.92fr);
}

.story-step-textonly {
  grid-template-areas: "copy";
  grid-template-columns: minmax(0, 1fr);
}

.story-step-stack {
  grid-template-areas:
    "copy"
    "figure";
  grid-template-columns: minmax(0, 1fr);
}

.story-number {
  position: absolute;
  left: -0.05rem;
  top: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.story-copy {
  grid-area: copy;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-width: 0;
}

.figure-kicker {
  margin-bottom: 0.42rem;
  color: var(--state);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.story-copy p {
  margin-top: 0.55rem;
  color: var(--ink-soft);
  font-size: 0.87rem;
  line-height: 1.68;
}

.figure-logic {
  display: grid;
  gap: 0.48rem;
  width: 100%;
  margin: 0.8rem 0 0.65rem;
}

.figure-logic div {
  display: grid;
  grid-template-columns: 4.8rem 1fr;
  gap: 0.6rem;
  padding-top: 0.48rem;
  border-top: 1px solid var(--line);
}

.figure-logic dt {
  color: var(--action);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
}

.figure-logic dd {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.story-figure {
  grid-area: figure;
  position: relative;
  display: grid;
  min-height: 18rem;
  overflow: hidden;
  border: 1px solid rgba(32, 29, 25, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(32, 29, 25, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(32, 29, 25, 0.03) 1px, transparent 1px),
    #fffdf8;
  background-size: 20px 20px;
}

.story-figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.story-figure-pdf {
  min-height: auto;
  padding: 0;
  background: transparent;
}

.story-figure-pdf img,
.story-figure-pdf object {
  width: 100%;
  height: auto;
  border: 0;
  display: block;
}

.architecture-figures {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

.architecture-figure {
  display: block;
  width: 100%;
  padding: 0.7rem;
  min-height: auto;
  overflow: visible;
  border: 1px solid rgba(32, 29, 25, 0.12);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.78);
}

.architecture-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.architecture-figure figcaption {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
  text-align: center;
}

.story-taxonomy {
  grid-template-rows: minmax(23rem, 1fr) auto;
  background: #fffdf8;
}

.story-taxonomy img {
  min-height: 23rem;
  padding: 0.75rem;
  background: #fff;
}

.story-taxonomy figcaption {
  padding: 0.6rem 0.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.45;
}

.story-roadmap {
  display: grid;
  grid-area: figure;
  grid-template-columns: 7rem 1fr;
  gap: 0.7rem;
  min-height: 20.5rem;
  padding: 0.85rem;
  background: linear-gradient(180deg, #fffdf8, rgba(227, 235, 244, 0.42));
}

.definition-panel {
  min-height: 20rem;
  padding: 1rem;
  background: linear-gradient(180deg, #fffdf8, rgba(226, 239, 236, 0.52));
}

.definition-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  align-content: center;
  min-height: 100%;
}

.concept-card {
  display: grid;
  gap: 0.45rem;
  align-content: start;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.78);
}

.concept-card span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.concept-card p {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.concept-card code {
  width: max-content;
  font-size: 0.84rem;
}

.concept-vla {
  border-color: rgba(54, 95, 141, 0.26);
  background: rgba(227, 235, 244, 0.66);
}

.concept-wm {
  border-color: rgba(155, 100, 41, 0.28);
  background: rgba(241, 223, 201, 0.56);
}

.concept-wam {
  grid-column: 1 / -1;
  border-color: rgba(47, 118, 111, 0.36);
  background: linear-gradient(135deg, var(--state-soft), rgba(255, 253, 248, 0.82));
}

.concept-wam span {
  color: var(--state);
}

.definition-flow {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.definition-flow span {
  display: inline-flex;
  align-items: center;
  min-height: 2.4rem;
  padding: 0.5rem 0.7rem;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.35;
}

.roadmap-axis {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(32, 29, 25, 0.05);
}

.roadmap-axis span {
  writing-mode: vertical-rl;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.roadmap-stage {
  display: grid;
  gap: 0.2rem;
  align-content: center;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.8);
}

.main-stage {
  border-color: rgba(54, 95, 141, 0.3);
  background: var(--eval-soft);
}

.roadmap-stage strong {
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.3;
}

.roadmap-stage span {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.text-link,
.text-button {
  color: var(--action);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

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

.paradigm-card {
  padding: 1.1rem;
}

.cascaded-card {
  background: linear-gradient(180deg, var(--action-soft), rgba(251, 250, 246, 0.88));
}

.joint-card {
  background: linear-gradient(180deg, var(--eval-soft), rgba(251, 250, 246, 0.88));
}

.paradigm-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.paradigm-topline h3 {
  flex: 1 1 12rem;
}

.paradigm-topline code {
  flex: 0 1 auto;
}

.stage-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.stage-list div {
  display: grid;
  gap: 0.15rem;
  padding-top: 0.55rem;
  border-top: 1px solid rgba(32, 29, 25, 0.13);
}

.stage-list strong {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
}

.stage-list span {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.training-data-layout {
  display: grid;
  grid-template-columns: minmax(22rem, 0.9fr) minmax(31rem, 1.20fr);
  gap: 1.0rem;
  align-items: center;
}

.data-figure {
  display: grid;
  align-items: center;
  width: min(100%, 920px);
  margin: 0 auto;
  min-height: 100%;
  padding: 0.7rem;
  border: 1px solid rgba(32, 29, 25, 0.12);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.78);
}

.data-figure img {
  width: 100%;
  height: auto;
}

.data-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.data-row {
  display: grid;
  align-content: start;
  gap: 0.32rem;
  align-items: start;
  padding: 0.95rem;
}

.eval-card span,
.challenge-grid span {
  color: var(--state);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-row span {
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.35;
}

.data-row h3 {
  color: var(--state);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.45;
  text-transform: uppercase;
}

.data-row h3,
.data-row p { margin-top: 0; }

.eval-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.eval-sections {
  display: grid;
  gap: 0.9rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.eval-section-card {
  display: grid;
  gap: 0.95rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.78);
}

.eval-section-head p:not(.eyebrow) {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.68;
}

.eval-subgrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

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

.eval-card {
  min-height: 13rem;
  padding: 1rem;
}

.eval-card.emphasis {
  border-color: rgba(155, 78, 67, 0.32);
  background: linear-gradient(180deg, var(--risk-soft), rgba(251, 250, 246, 0.9));
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.report-card {
  overflow: hidden;
  transition: box-shadow 150ms ease, transform 150ms ease;
}

.report-card:hover,
.paper-card:hover {
  box-shadow: var(--shadow);
}

.report-media {
  display: block;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--line);
  background: rgba(32, 29, 25, 0.05);
}

.report-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.report-body {
  padding: 1rem;
}

.report-kicker,
.paper-lane,
.paper-year {
  color: var(--muted);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.report-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.9rem;
}

.explorer-panel {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.library-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 15rem);
  gap: 0.7rem;
  align-items: end;
}

.search-box {
  display: grid;
  gap: 0.38rem;
}

.search-box span,
.sort-box span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.search-box input {
  width: 100%;
  min-height: 2.85rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(32, 29, 25, 0.04);
  color: var(--ink);
}

.search-box input:focus {
  border-color: var(--line-strong);
  background: rgba(251, 250, 246, 0.8);
}

.search-box input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.sort-box {
  display: grid;
  gap: 0.38rem;
}

.sort-box select {
  width: 100%;
  min-height: 2.85rem;
  padding: 0.7rem 2.4rem 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(32, 29, 25, 0.04);
  color: var(--ink);
}

.sort-box select:focus {
  border-color: var(--line-strong);
  background: rgba(251, 250, 246, 0.8);
}

.sort-box select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.46rem;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.44rem;
  min-height: 2.2rem;
  padding: 0.42rem 0.86rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: transparent;
  color: var(--ink);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 140ms, border-color 140ms, color 140ms;
}

.filter-tab:hover {
  border-color: var(--line-strong);
  background: rgba(32, 29, 25, 0.04);
}

.filter-tab.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fffdf8;
}

.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.45rem;
  min-height: 1.15rem;
  padding: 0 0.28rem;
  border-radius: 5px;
  background: rgba(32, 29, 25, 0.07);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1;
}

.filter-tab.active .filter-count {
  background: rgba(255, 253, 248, 0.18);
  color: #fffdf8;
}

.explorer-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.paper-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
}

.paper-card {
  display: grid;
  gap: 0.55rem;
  padding: 1rem;
  transition: box-shadow 150ms ease;
}

.paper-card.is-report {
  border-color: rgba(155, 100, 41, 0.34);
  background: linear-gradient(180deg, var(--action-soft), rgba(251, 250, 246, 0.9));
}

.paper-card-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem 1rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.38rem;
  margin-top: 0.15rem;
}

.chip,
.paper-link {
  display: inline-flex;
  align-items: center;
  min-height: 1.65rem;
  padding: 0.22rem 0.52rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1.25;
}

.chip {
  background: rgba(32, 29, 25, 0.04);
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
  margin-top: 0.15rem;
  justify-content: flex-start;
}

.paper-link:hover {
  border-color: var(--line-strong);
  background: rgba(32, 29, 25, 0.04);
}

.empty-state {
  padding: 1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 1.2rem;
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.72rem;
}

.challenge-grid article {
  min-height: 10.5rem;
  padding: 1rem;
}

.challenge-grid span {
  color: var(--risk);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.6rem 1.15rem;
  background: rgba(235, 228, 216, 0.55);
}

.footer-inner {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.82rem;
}

@media (min-width: 1060px) {
  .site-footer {
    padding-left: 0;
    padding-right: 0;
  }

  .footer-inner {
    width: min(var(--content-max), calc(100% - var(--sidebar-w) - var(--desktop-gutter) - var(--desktop-gutter)));
    margin-left: calc(var(--sidebar-w) + max(var(--desktop-gutter), calc((100vw - var(--sidebar-w) - var(--content-max)) / 2)));
    margin-right: auto;
  }
}

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

.footer-links a {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  transition: color 140ms;
}

.footer-links a:hover { color: var(--ink); }

.noscript-banner {
  position: fixed;
  inset: auto 1rem 1rem;
  max-width: 26rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.875rem;
  box-shadow: var(--shadow);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms ease, transform 500ms ease;
  transition-delay: var(--delay, 0ms);
}

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

@media (max-width: 980px) {
  .hero-section,
  .section-grid,
  .training-data-layout,
  .story-step,
  .architecture-grid,
  .architecture-figures,
  .eval-grid,
  .eval-subgrid,
  .eval-subgrid-policy,
  .report-grid {
    grid-template-columns: 1fr;
  }

  .story-step,
  .story-step-reverse,
  .story-step-definition {
    grid-template-areas:
      "copy"
      "figure";
  }

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

  .thesis-board {
    width: 100%;
  }

  .sticky-heading {
    position: static;
  }

  .data-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .library-tools {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .content-main {
    padding: 1.75rem 1rem 4rem;
  }

  h1 {
    font-size: clamp(32px, 14vw, 48px);
  }

  .paper-actions {
    flex-direction: column;
    align-items: center;
  }

  .coupling-rail {
    grid-template-columns: 1fr;
  }

  .coupling-rail span:not(:last-child)::after {
    display: none;
  }

  .formula-row {
    grid-template-columns: 1fr;
  }

  .formula-name {
    grid-row: auto;
  }

  .formula-row p {
    grid-column: auto;
  }

  .storyline::before {
    left: 1.05rem;
  }

  .story-step {
    padding: 1rem 1rem 1rem 2.8rem;
  }

  .story-number {
    width: 2.25rem;
    height: 2.25rem;
  }

  .story-roadmap {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .roadmap-axis {
    min-height: 2.6rem;
  }

  .roadmap-axis span {
    writing-mode: horizontal-tb;
  }

  .story-taxonomy {
    grid-template-rows: minmax(17rem, 1fr) auto;
  }

  .story-taxonomy img {
    min-height: 17rem;
    padding: 0.5rem;
  }

  .definition-map,
  .definition-flow {
    grid-template-columns: 1fr;
  }

  .data-matrix {
    grid-template-columns: 1fr;
  }

  .challenge-grid {
    grid-template-columns: 1fr;
  }

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

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

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