:root {
  --bg: #eef5fb;
  --ink: #14263a;
  --muted: #587086;
  --line: #d5e2ed;
  --panel: #ffffff;
  --accent: #1769aa;
  --accent-soft: #e9f4ff;
  --shadow: 0 18px 42px rgba(29, 78, 116, 0.09);
  --radius: 18px;
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.65;
  background:
    radial-gradient(circle at 8% 0%, rgba(38, 139, 210, 0.14), transparent 31%),
    radial-gradient(circle at 100% 24%, rgba(92, 180, 226, 0.11), transparent 28%),
    linear-gradient(180deg, #fafdff 0%, var(--bg) 48%, #eaf1f7 100%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1080px, calc(100% - 36px));
  margin: 0 auto;
}

.top {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 14px 0;
}

.actions {
  display: flex;
  gap: 4px;
  padding: 5px;
  border: 1px solid rgba(207, 224, 237, 0.94);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 10px 30px rgba(31, 86, 128, 0.08);
  backdrop-filter: blur(16px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: #fff;
  border-color: var(--line);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #1769aa, #2382c3);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #12588f, #1d74ae);
  border-color: #12588f;
  color: #fff;
}

.section-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-card,
.section-block {
  scroll-margin-top: 18px;
  margin-bottom: 22px;
  padding: 34px 36px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.paper-hero {
  position: relative;
  overflow: hidden;
  padding: 46px 56px 44px;
  background: linear-gradient(145deg, #ffffff 0%, #f7fbff 100%);
  text-align: center;
}

.paper-hero::before {
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, #1769aa, #37a4d9 58%, #8bd4ec);
  content: "";
}

.conference-label {
  display: inline-flex;
  margin: 0 0 20px;
  padding: 6px 12px;
  border: 1px solid #bfdbef;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.paper-title {
  max-width: 900px;
  margin: 0 auto 22px;
  font-family: var(--serif);
  font-size: clamp(1.85rem, 3.4vw, 2.7rem);
  font-weight: 650;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.authors {
  max-width: 900px;
  margin: 0 auto 10px;
  color: #294057;
  font-size: 1rem;
  line-height: 1.8;
}

.affiliations {
  max-width: 880px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.meta-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
  font-size: 0.88rem;
  font-weight: 600;
}

.meta-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid #c9dfef;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 5px 16px rgba(29, 91, 136, 0.055);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.meta-links a:hover {
  transform: translateY(-2px);
  border-color: #6eaed6;
  box-shadow: 0 8px 22px rgba(29, 91, 136, 0.12);
  text-decoration: none;
}

.abstract-block {
  padding-top: 42px;
}

.abstract-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.55fr);
  gap: clamp(32px, 6vw, 68px);
  align-items: start;
}

.abstract-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 650;
  line-height: 1.13;
  letter-spacing: -0.02em;
}

.overview-copy {
  max-width: 70ch;
}

.overview-copy p {
  margin: 0 0 14px;
  color: #294057;
}

.overview-copy p:first-child {
  font-size: 1.06rem;
  line-height: 1.7;
}

.paper-figure {
  margin: 28px 0 0;
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, var(--accent));
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(29, 91, 136, 0.07);
}

.paper-figure picture {
  display: block;
}

.paper-figure img {
  display: block;
  width: 100%;
  border-radius: 10px;
  background: #fff;
}

.paper-figure figcaption {
  margin: 11px 10px 2px;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
  font-style: italic;
}

.section-head {
  max-width: 68ch;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 650;
}

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

.failure-grid,
.pillar-grid,
.compare-grid {
  display: grid;
  gap: 14px;
}

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

.compare-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.failure-card,
.pillar-card,
.compare-card {
  display: grid;
  gap: 8px;
  padding: 22px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
  color: inherit;
  text-decoration: none;
  box-shadow: 0 10px 28px rgba(29, 91, 136, 0.055);
}

.failure-card {
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.failure-card:hover {
  transform: translateY(-2px);
  border-color: #b7c7d8;
  box-shadow: 0 16px 34px rgba(21, 32, 43, 0.08);
  text-decoration: none;
}

.failure-index,
.pillar-index {
  font-family: var(--serif);
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 700;
}

.failure-card h3,
.pillar-card h3,
.compare-card h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.22rem;
  font-weight: 650;
}

.failure-card p,
.pillar-card p,
.compare-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.failure-link {
  margin-top: 4px;
  color: var(--accent);
  font-weight: 650;
  font-size: 0.9rem;
}

.case-cta {
  margin-top: 18px;
}

.compare-accent {
  background: var(--accent-soft);
  border-color: #b8d7ec;
}

.ref-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f4f8fb;
  overflow: auto;
}

.bibtex {
  margin: 0;
  padding: 18px 20px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.55;
  color: #294057;
}

.demo-block {
  padding-bottom: 18px;
}

.demo-frame-wrap {
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: #f3f8fc;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.demo-frame {
  display: block;
  width: 100%;
  height: min(78vh, 820px);
  border: 0;
  background: #f3f8fc;
}

.site-footer {
  padding: 8px 0 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
  max-width: 75ch;
}

@media (max-width: 860px) {
  .top {
    justify-content: center;
  }

  .actions {
    max-width: 100%;
  }

  .btn {
    flex: 0 0 auto;
  }

  .paper-card,
  .section-block {
    padding: 24px 20px;
  }

  .paper-hero {
    padding: 42px 30px 38px;
  }

  .abstract-layout {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .abstract-heading {
    max-width: 560px;
  }

  .failure-grid,
  .pillar-grid,
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 22px, 1080px);
  }

  .paper-card,
  .section-block {
    padding: 22px 16px;
    border-radius: 20px;
  }

  .top {
    width: 100%;
    padding: 9px 11px 12px;
  }

  .actions {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }

  .actions::-webkit-scrollbar {
    display: none;
  }

  .btn {
    padding: 8px 13px;
    font-size: 0.84rem;
  }

  .paper-hero {
    padding: 34px 18px 28px;
  }

  .conference-label {
    margin-bottom: 16px;
    font-size: 0.68rem;
  }

  .paper-title {
    margin-bottom: 18px;
    font-size: clamp(1.65rem, 7.5vw, 2.05rem);
    line-height: 1.14;
  }

  .authors {
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .affiliations {
    font-size: 0.8rem;
  }

  .meta-links {
    gap: 7px;
    margin-top: 22px;
  }

  .meta-links a {
    flex: 1 1 calc(50% - 7px);
    justify-content: center;
    min-width: 138px;
    padding: 9px 10px;
  }

  .abstract-block {
    padding-top: 28px;
  }

  .abstract-heading h2 {
    font-size: 1.8rem;
  }

  .paper-figure {
    margin-top: 22px;
    padding: 6px;
    border-radius: 14px;
  }

  .paper-figure img {
    border-radius: 9px;
  }

  .paper-figure figcaption {
    margin: 9px 7px 3px;
    font-size: 0.84rem;
    line-height: 1.45;
  }
}