:root {
  --bg: #04101c;
  --bg-alt: #081a2b;
  --panel: rgba(9, 25, 43, 0.82);
  --panel-strong: rgba(14, 35, 58, 0.94);
  --line: rgba(255, 255, 255, 0.11);
  --text: #f6f1e8;
  --muted: #acc0d8;
  --soft: #d9e7f3;
  --accent: #ffb266;
  --accent-soft: rgba(255, 178, 102, 0.15);
  --accent-cool: #8ed6ff;
  --accent-green: #bbf08f;
  --shadow: 0 24px 70px rgba(1, 7, 14, 0.42);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1200px;
  --body-font: "Aptos", "Segoe UI", "Apple SD Gothic Neo", sans-serif;
  --display-font: "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body-font);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(96, 156, 255, 0.16), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(255, 178, 102, 0.16), transparent 24%),
    radial-gradient(circle at 20% 80%, rgba(142, 214, 255, 0.14), transparent 26%),
    linear-gradient(180deg, #020812 0%, #061322 42%, #020812 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 24%, rgba(255, 255, 255, 0.8) 0 1px, transparent 1.8px),
    radial-gradient(circle at 72% 18%, rgba(255, 255, 255, 0.7) 0 1px, transparent 2px),
    radial-gradient(circle at 62% 72%, rgba(255, 255, 255, 0.6) 0 1px, transparent 2px),
    radial-gradient(circle at 36% 56%, rgba(255, 255, 255, 0.55) 0 1px, transparent 2px);
  opacity: 0.45;
  pointer-events: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
a {
  color: inherit;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero,
.card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 1.5rem;
  padding: 2rem;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(140deg, rgba(16, 36, 59, 0.95), rgba(5, 18, 31, 0.88)),
    radial-gradient(circle at top right, rgba(255, 178, 102, 0.16), transparent 30%);
}

.hero::after,
.card::after {
  content: "";
  position: absolute;
  inset: auto -80px -120px auto;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(142, 214, 255, 0.2), transparent 70%);
  pointer-events: none;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-cool);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--display-font);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  line-height: 0.95;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.05;
}

h3 {
  font-size: 1.2rem;
}

.hero-subtitle,
.authors,
.concept-description,
.abstract-text,
.idea-text {
  color: var(--muted);
  line-height: 1.7;
}

.hero-subtitle {
  max-width: 62ch;
  margin: 0;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.9rem 1.2rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, rgba(255, 178, 102, 0.95), rgba(255, 149, 76, 0.92));
  color: #1d140a;
  border-color: rgba(255, 200, 152, 0.3);
  font-weight: 700;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.04);
}

.hero-panel {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-panel-head,
.section-head,
.section-head-compact {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.hero-panel-head {
  align-items: center;
  color: var(--soft);
  margin-bottom: 1rem;
}

.status-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-green), #82d6ff);
  box-shadow: 0 0 16px rgba(187, 240, 143, 0.9);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.stat-card {
  padding: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(5, 13, 24, 0.45);
}

.stat-label {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.stat-value {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.35;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(12, 27, 45, 0.94), rgba(6, 17, 30, 0.9)),
    radial-gradient(circle at top right, rgba(255, 178, 102, 0.12), transparent 35%);
}

.spotlight,
.ideas-card {
  grid-column: span 12;
}

.concept-card {
  grid-column: span 12;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--soft);
  font-size: 0.86rem;
}

.authors {
  margin: 1rem 0 0;
}

.summary-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.summary-block,
.idea-card {
  padding: 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.bullet-list {
  margin: 0.95rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.65rem;
  color: var(--soft);
  line-height: 1.65;
}

.abstract-panel {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(3, 10, 19, 0.56);
}

.abstract-panel.is-collapsed {
  display: none;
}

.abstract-text {
  margin: 0.95rem 0 0;
  white-space: pre-line;
}

.concept-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.15rem;
  margin-top: 1.1rem;
}

.concept-copy {
  display: grid;
  gap: 0.75rem;
  max-width: 78ch;
}

.concept-description {
  margin: 0;
  color: var(--soft);
  font-size: 1.02rem;
}

.ideas-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.1rem;
}

.idea-kicker {
  display: inline-flex;
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #ffd7ab;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.idea-text {
  margin: 0.85rem 0 0;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 550ms ease, transform 550ms ease;
}

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

@media (max-width: 980px) {
  .hero,
  .summary-layout,
  .ideas-grid {
    grid-template-columns: 1fr;
  }

  .concept-card {
    grid-column: span 12;
  }

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

@media (max-width: 720px) {
  .site-shell {
    width: min(calc(100% - 1rem), var(--max-width));
    padding: 1rem 0 3rem;
  }

  .hero,
  .card {
    padding: 1.2rem;
  }

  .hero-panel-head,
  .section-head,
  .section-head-compact {
    flex-direction: column;
  }

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