:root {
  --bg: #f4efe6;
  --bg-soft: #ede5d8;
  --card: rgba(255, 252, 247, 0.88);
  --card-strong: #fffaf2;
  --text: #14251f;
  --muted: #54635d;
  --accent: #a05538;
  --accent-strong: #8b452a;
  --accent-soft: rgba(160, 85, 56, 0.12);
  --line: rgba(20, 37, 31, 0.12);
  --sidebar: #16352e;
  --sidebar-text: #f7f1e7;
  --shadow: 0 24px 60px rgba(15, 31, 26, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Helvetica Neue", Helvetica, Arial, "Nimbus Sans L", "Liberation Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(160, 85, 56, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(22, 53, 46, 0.15), transparent 26%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 48%, #f1eadf 100%);
}

a {
  color: inherit;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(220px, 250px) minmax(0, 1fr);
  gap: 0;
  min-height: 100vh;
}

.sidebar {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 24%),
    linear-gradient(180deg, #16352e 0%, #122c27 100%);
  color: var(--sidebar-text);
}

.sidebar::after {
  content: "";
  position: absolute;
  inset: 24px 18px 24px auto;
  width: 1px;
  background: rgba(247, 241, 231, 0.18);
}

.sidebar-inner {
  position: sticky;
  top: 0;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  gap: 24px;
  padding: 40px 28px;
}

.eyebrow,
.paper-type,
.portrait-label {
  margin: 0;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 700;
}

.eyebrow {
  color: rgba(247, 241, 231, 0.72);
}

.sidebar-role {
  margin: 0;
  font-size: 2rem;
  line-height: 1.05;
  font-weight: 700;
}

.sidebar-affiliation {
  margin: -8px 0 0;
  color: rgba(247, 241, 231, 0.78);
  font-size: 1rem;
}

.section-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.section-nav a {
  width: fit-content;
  text-decoration: none;
  color: rgba(247, 241, 231, 0.78);
  font-size: 1.05rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.section-nav a:hover,
.section-nav a:focus-visible {
  color: var(--sidebar-text);
  transform: translateX(4px);
}

.sidebar-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin-top: auto;
}

.sidebar-links .icon-link {
  width: 2.2rem;
  height: 2.2rem;
  min-width: 2.2rem;
  min-height: 2.2rem;
}

.sidebar-links .icon-link svg {
  width: 0.95rem;
  height: 0.95rem;
}

.icon-link,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.62rem 1rem;
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.icon-link:hover,
.icon-link:focus-visible,
.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(15, 31, 26, 0.12);
}

.icon-link {
  width: 2.85rem;
  height: 2.85rem;
  min-width: 2.85rem;
  min-height: 2.85rem;
  padding: 0;
  border-radius: 50%;
  background: rgba(255, 250, 242, 0.9);
  color: var(--text);
  border-color: rgba(20, 37, 31, 0.12);
}

.icon-link svg {
  display: block;
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

.icon-link path {
  fill: currentColor;
}

.icon-link-light {
  background: rgba(247, 241, 231, 0.14);
  color: var(--sidebar-text);
  border-color: rgba(247, 241, 231, 0.22);
}

.content {
  width: min(1120px, calc(100vw - 286px));
  padding: 48px clamp(24px, 4vw, 56px) 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  margin-bottom: 72px;
}

.hero h1,
.section-heading h2,
.paper-card h3 {
  margin: 0;
}

.hero h1 {
  font-size: clamp(1.9rem, 3.8vw, 2.65rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.hero-subtitle,
.hero-summary {
  max-width: 44rem;
  font-size: 1.2rem;
  line-height: 1.62;
  color: var(--muted);
}

.hero-subtitle {
  margin: 22px 0 16px;
}

.hero-subtitle-line {
  display: block;
}

.hero-summary {
  margin: 0;
}

.hero-subtitle a,
.paper-card a:not(.button) {
  color: var(--accent-strong);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

.hero-tags span {
  border-radius: 999px;
  background: var(--accent-soft);
  padding: 0.55rem 0.9rem;
  color: var(--accent-strong);
  font-size: 0.95rem;
  font-weight: 700;
}

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

.hero-actions .icon-link {
  background: var(--accent);
  color: #fff8f1;
  border-color: var(--accent);
}

.hero-actions .icon-link:hover,
.hero-actions .icon-link:focus-visible {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.button {
  cursor: pointer;
  background: transparent;
  color: var(--text);
  border-color: rgba(20, 37, 31, 0.16);
  font-family: inherit;
}

.button-toggle[aria-expanded="true"] {
  background: var(--text);
  color: #fff8f1;
  border-color: var(--text);
}

.hero-portrait {
  position: relative;
}

.portrait-frame {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(20, 37, 31, 0.06), rgba(20, 37, 31, 0.02));
  padding: 18px;
  box-shadow: var(--shadow);
}

.portrait-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(160, 85, 56, 0.14), transparent 48%);
  pointer-events: none;
}

.portrait-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
}

.portrait-note {
  margin-top: 18px;
  border: 1px solid rgba(20, 37, 31, 0.1);
  border-radius: 22px;
  background: rgba(255, 250, 242, 0.8);
  padding: 18px 20px;
  box-shadow: 0 16px 34px rgba(15, 31, 26, 0.06);
}

.portrait-label {
  color: var(--accent);
}

.portrait-note p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.content-section {
  margin-top: 54px;
  scroll-margin-top: 28px;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  letter-spacing: -0.03em;
}

.section-heading p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.paper-grid {
  display: grid;
  gap: 22px;
}

.paper-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), var(--card));
  padding: 28px;
  box-shadow: 0 22px 48px rgba(15, 31, 26, 0.08);
}

.paper-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(160, 85, 56, 0.16), transparent 70%);
  pointer-events: none;
}

.paper-type {
  color: var(--accent);
}

.paper-card h3 {
  margin-top: 10px;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  line-height: 1.3;
  letter-spacing: -0.03em;
  text-wrap: pretty;
}

.paper-authors {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.paper-panel {
  margin-top: 18px;
  border: 1px solid rgba(20, 37, 31, 0.08);
  border-radius: 22px;
  background: var(--card-strong);
  padding: 18px 20px;
}

.paper-panel p,
.paper-panel pre {
  margin: 0;
  line-height: 1.7;
  color: var(--muted);
}

.paper-panel-code {
  overflow-x: auto;
}

.paper-panel code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92rem;
  color: #21362f;
}

@media (max-width: 1040px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar::after {
    display: none;
  }

  .sidebar-inner {
    position: relative;
    min-height: auto;
    padding: 28px 22px;
  }

  .section-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .content {
    width: min(100%, 960px);
    padding: 28px 22px 56px;
  }

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

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.95rem;
  }

  .sidebar-inner {
    gap: 18px;
    padding: 22px 18px;
  }

  .sidebar-role {
    font-size: 1.5rem;
  }

  .sidebar-affiliation,
  .section-nav a,
  .hero-subtitle,
  .hero-summary,
  .paper-authors {
    font-size: 0.98rem;
  }

  .sidebar-links {
    gap: 6px;
  }

  .paper-card,
  .portrait-note {
    padding: 20px;
  }

  .paper-card h3 {
    font-size: 1.15rem;
    line-height: 1.28;
  }

  .button,
  .icon-link {
    font-size: 0.92rem;
  }

  .paper-actions {
    gap: 10px;
  }
}