:root {
  color-scheme: light;
  --site-bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #172033;
  --muted: #607086;
  --accent: #3157a4;
  --accent-hover: #24437f;
  --accent-contrast: #ffffff;
  --border: #dfe6ef;
  --nav-bg: rgba(255, 255, 255, 0.86);
  --media-bg: #f3f6fa;
  --hero-glow: rgba(49, 87, 164, 0.15);
  --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 22px 60px rgba(15, 23, 42, 0.11);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --site-bg: #0b111b;
    --surface: #111a27;
    --surface-soft: #162131;
    --text: #e8eef8;
    --muted: #a6b3c7;
    --accent: #8ab4ff;
    --accent-hover: #b7ceff;
    --accent-contrast: #07111f;
    --border: #26364b;
    --nav-bg: rgba(11, 17, 27, 0.88);
    --media-bg: #f3f6fa;
    --hero-glow: rgba(91, 137, 230, 0.24);
    --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.24);
    --shadow-lg: 0 26px 70px rgba(0, 0, 0, 0.38);
  }
}

html {
  scroll-behavior: smooth;
  background: var(--site-bg);
}

body {
  background: var(--site-bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  transition: background-color 180ms ease, color 180ms ease;
}

body,
.masthead,
.greedy-nav,
.greedy-nav .hidden-links,
.page__content,
details,
.paper-box {
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

a,
a:visited {
  color: var(--accent);
}

a:hover,
a:focus-visible {
  color: var(--accent-hover);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline: 3px solid color-mix(in srgb, var(--accent) 40%, transparent);
  outline-offset: 3px;
}

.masthead {
  background: var(--nav-bg);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.greedy-nav {
  background: transparent;
}

.greedy-nav a {
  color: var(--text);
}

.greedy-nav a:hover {
  color: var(--accent);
}

.greedy-nav button {
  background: var(--accent);
  color: var(--accent-contrast);
}

.greedy-nav .hidden-links {
  background: var(--surface);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.greedy-nav .hidden-links::before {
  border-color: var(--border) transparent;
}

.greedy-nav .hidden-links::after {
  border-color: var(--surface) transparent;
}

.greedy-nav .hidden-links a:hover {
  background: var(--surface-soft);
}

#main {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.5rem);
}

.page,
.page__inner-wrap,
.page__content {
  width: 100% !important;
  max-width: none !important;
}

.page {
  float: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.page__content {
  color: var(--text);
}

.page__content p,
.page__content li,
.page__content dl {
  font-size: 1rem;
}

.page__content > h1 {
  margin-top: clamp(3.5rem, 8vw, 5.5rem);
  padding-bottom: 0.65rem;
  color: var(--text);
  font-size: clamp(1.9rem, 4vw, 2.45rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  border-bottom: 1px solid var(--border);
}

.page__content h2,
.page__content h3,
.page__content h4 {
  color: var(--text);
}

.page__content .anchor,
.page__content h1,
.page__content h2 {
  scroll-margin-top: 5.5rem;
}

.page__content h1::before,
.page__content .anchor::before {
  height: 4.5rem;
  margin-top: -4.5rem;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  overflow: hidden;
  margin: 0 0 clamp(3rem, 7vw, 5rem);
  padding: clamp(1.5rem, 5vw, 4rem);
  background:
    radial-gradient(circle at 88% 12%, var(--hero-glow), transparent 34%),
    linear-gradient(145deg, var(--surface), var(--surface-soft));
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.hero::after {
  position: absolute;
  right: -5rem;
  bottom: -7rem;
  z-index: -1;
  width: 18rem;
  height: 18rem;
  content: "";
  background: radial-gradient(circle, var(--hero-glow), transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}

.hero__content {
  min-width: 0;
}

.hero__eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero__title {
  max-width: 760px;
  margin: 0;
  padding: 0;
  color: var(--text);
  font-size: clamp(2.7rem, 7vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
  border: 0;
}

.hero__lead {
  max-width: 720px;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.hero__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.58rem 1rem;
  color: var(--text) !important;
  font-weight: 700;
  line-height: 1;
  text-decoration: none !important;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 11px;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.hero__button:hover {
  color: var(--accent) !important;
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.hero__button--primary {
  color: var(--accent-contrast) !important;
  background: var(--accent);
  border-color: var(--accent);
}

.hero__button--primary:hover {
  color: var(--accent-contrast) !important;
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.hero__tags span {
  padding: 0.34rem 0.72rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  background: color-mix(in srgb, var(--surface-soft) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.hero__highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.hero__highlights li {
  min-width: 0;
  margin: 0;
  padding: 0.8rem;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.hero__highlights strong,
.hero__highlights span {
  display: block;
}

.hero__highlights strong {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.2;
}

.hero__highlights span {
  margin-top: 0.24rem;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
  text-overflow: ellipsis;
}

.hero__portrait-frame {
  position: relative;
  width: 100%;
  max-width: 300px;
  margin-left: auto;
  padding: 0.55rem;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
  border-radius: 26px;
  box-shadow: var(--shadow-sm);
}

.hero__portrait {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  border-radius: 20px;
}

details {
  margin: 1.25rem 0;
  overflow: hidden;
  overflow: clip;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

summary {
  padding: 0.95rem 1.15rem;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

summary::marker {
  color: var(--accent);
}

summary h2 {
  display: inline;
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  letter-spacing: -0.015em;
}

details[open] summary {
  border-bottom: 1px solid var(--border);
}

.paper-box {
  display: grid !important;
  grid-template-columns: minmax(190px, 32%) minmax(0, 1fr);
  gap: clamp(1.1rem, 3vw, 1.8rem);
  align-items: start !important;
  margin: 0 !important;
  padding: clamp(1rem, 3vw, 1.4rem) !important;
  background: var(--surface);
  border: 0 !important;
  border-bottom: 1px solid var(--border) !important;
}

.paper-box:last-child {
  border-bottom: 0 !important;
}

.paper-box-image {
  display: block !important;
  width: auto !important;
  min-width: 0 !important;
  max-width: none !important;
  order: initial !important;
}

.paper-box-image > div {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--media-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.paper-box-image img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none !important;
  object-fit: contain !important;
  background: var(--media-bg);
  box-shadow: none !important;
}

.paper-box-text {
  min-width: 0;
  max-width: none !important;
  padding-left: 0 !important;
  order: initial !important;
}

.paper-box-text > p:first-child,
.paper-box-text > p:first-of-type {
  margin-top: 0;
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.45;
}

.badge {
  position: absolute !important;
  top: 0.65rem;
  left: 0.65rem;
  z-index: 1;
  margin: 0 !important;
  padding: 0.28rem 0.62rem !important;
  color: var(--accent-contrast) !important;
  font-size: 0.7rem !important;
  font-weight: 750;
  line-height: 1.35;
  background: var(--accent) !important;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.16);
}

.page-updated {
  margin-top: 4rem !important;
  padding-top: 1rem;
  color: var(--muted);
  font-size: 0.82rem !important;
  text-align: right;
  border-top: 1px solid var(--border);
}

@media (prefers-reduced-motion: no-preference) {
  .hero__content {
    animation: hero-content-enter 600ms cubic-bezier(0.2, 0.75, 0.25, 1) both;
  }

  .hero__portrait-frame {
    animation: hero-portrait-enter 700ms 80ms cubic-bezier(0.2, 0.75, 0.25, 1) both;
  }

  .paper-box {
    transition: background-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
  }

  .paper-box:hover {
    z-index: 1;
    background: var(--surface-soft);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
  }
}

@keyframes hero-content-enter {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-portrait-enter {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 767px) {
  #main {
    padding: 0.85rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1.35rem;
    border-radius: 18px;
  }

  .hero__portrait-frame {
    width: 146px;
    margin: 0 auto;
    order: -1;
    padding: 0.35rem;
    border-radius: 50%;
  }

  .hero__portrait {
    aspect-ratio: 1;
    border-radius: 50%;
  }

  .hero__title {
    font-size: clamp(2.45rem, 13vw, 3.6rem);
  }

  .hero__actions {
    gap: 0.55rem;
  }

  .hero__button {
    flex: 1 1 auto;
    min-width: 46%;
  }

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

  .hero__highlights li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.75rem;
    align-items: center;
  }

  .hero__highlights span {
    margin-top: 0;
  }

  .paper-box {
    grid-template-columns: 1fr;
  }

  .paper-box-image > div {
    aspect-ratio: 16 / 9;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  :root {
    color-scheme: light;
    --site-bg: #ffffff;
    --surface: #ffffff;
    --surface-soft: #ffffff;
    --text: #000000;
    --muted: #333333;
    --border: #cccccc;
  }

  .masthead,
  .hero__actions {
    display: none !important;
  }

  .hero,
  details,
  .paper-box {
    box-shadow: none !important;
  }
}