@charset "UTF-8";
/* 1B: concise overview, full technique once in the numbered reading section. */
.detail-top .detail-intro {
  max-width: 44rem;
  color: #b5b2ad;
  font-size: 1.05rem;
}
.site-footer nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
}
:root {
  --bg: #101012;
  --surface: #19191c;
  --surface2: #202023;
  --text: #f2eee7;
  --muted: #b5b2ad;
  --line: #38383d;
  --red: #d83e42;
  --red-dark: #8d2029;
  --max: 1240px;
  color-scheme: dark;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 1rem;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}
button,
input,
select,
summary {
  font: inherit;
}
a,
button,
summary {
  -webkit-tap-highlight-color: transparent;
}
button,
summary {
  cursor: pointer;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #f9c27a;
  outline-offset: 5px;
}
button,
input,
select {
  min-height: 48px;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
p,
h1,
h2,
h3 {
  overflow-wrap: anywhere;
}
h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.04em;
}
h1 {
  font-size: clamp(2.5rem, 6.5vw, 5.8rem);
  margin: 0.25em 0 0.45em;
  font-weight: 850;
}
h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.8rem);
  margin: 0 0 0.6em;
}
p {
  margin: 0 0 1.3em;
}
small,
.fine {
  font-size: 0.82rem;
  color: var(--muted);
}
.skip {
  position: absolute;
  left: 16px;
  top: 10px;
  background: var(--text);
  color: var(--bg);
  padding: 12px;
  transform: translateY(-160%);
  z-index: 10;
}
.skip:focus {
  transform: none;
}
.site-header {
  max-width: var(--max);
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
  border-bottom: 1px solid var(--line);
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  line-height: 1.1;
}
.brand-sub {
  display: block;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.65rem;
  letter-spacing: 0.23em;
  margin-top: 5px;
}
.desktop-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}
.desktop-nav a {
  font-size: 0.9rem;
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.desktop-nav a:hover {
  color: #fff;
}
.language {
  border-left: 1px solid var(--line);
  padding-left: 24px;
}
.mobile-nav {
  display: none;
}
.shell {
  max-width: var(--max);
  margin: auto;
  padding: 70px 32px;
}
.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  font-weight: 750;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 14px;
}
.eyebrow.red {
  color: #fa8588;
}
.hero {
  max-width: var(--max);
  margin: auto;
  padding: 74px 32px 0;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: center;
}
.hero h1 {
  font-family: Impact, "Arial Narrow", sans-serif;
  font-weight: 900;
  font-size: clamp(4rem, 8vw, 7.5rem);
  letter-spacing: -0.035em;
  line-height: 0.94;
}
.hero-copy > p {
  font-size: 1.08rem;
  max-width: 36rem;
  color: var(--muted);
  margin-top: 28px;
}
.hero-art {
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: radial-gradient(ellipse at 52% 52%, #53202b6b 0, transparent 66%);
  min-width: 0;
}
.hero-art img {
  width: min(100%, 440px);
  position: relative;
  filter: drop-shadow(0 22px 32px #0007);
}
.hero-art:before {
  content: "";
  position: absolute;
  width: 90%;
  aspect-ratio: 1;
  border: 1px solid #71303b66;
  border-radius: 50%;
  max-width: 410px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 28px 0;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 50px;
  padding: 12px 22px;
  border: 1px solid var(--red);
  border-radius: 3px;
  background: var(--red-dark);
  color: #fff;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.9rem;
}
.button:hover {
  background: #ab2a34;
}
.button.secondary {
  background: transparent;
  border-color: #55545a;
}
.button.secondary:hover {
  background: var(--surface);
}
.button.small {
  min-height: 44px;
  padding: 8px 16px;
}
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: 44px;
  padding: 22px 0;
}
.stats-bar strong {
  font-size: 1.65rem;
  line-height: 1.2;
  display: block;
}
.stats-bar span {
  color: var(--muted);
  font-size: 0.82rem;
}
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 32px;
}
.section-head p {
  max-width: 38rem;
  color: var(--muted);
  margin-bottom: 0;
}
.section-head .text-link {
  white-space: nowrap;
}
.text-link {
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 650;
}
.group-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}
.group-tile {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 12px;
  text-decoration: none;
  transition: border-color 0.15s;
}
.group-tile img {
  width: 100%;
  max-width: 150px;
  margin: auto;
}
.group-tile strong {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  margin-top: 10px;
}
.group-tile:hover {
  border-color: #b95660;
}
.search-bar {
  display: flex;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 12px;
  max-width: 610px;
  margin-top: 26px;
}
.search-bar input {
  min-width: 0;
  flex: 1;
  background: transparent;
  color: var(--text);
  border: 0;
  padding: 4px 8px;
}
.search-bar label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.feature-band {
  background: #171719;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.feature-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
}
.feature-list {
  display: grid;
  gap: 0;
}
.feature-list div {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.feature-list h3 {
  font-size: 1.08rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.feature-list p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}
.catalog-head {
  max-width: 850px;
}
.catalog-head h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
}
.catalog-head p {
  color: var(--muted);
  font-size: 1.08rem;
}
.filters {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 16px;
  margin: 32px 0 22px;
  align-items: end;
  border-radius: 4px;
}
.field label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 650;
  margin-bottom: 7px;
}
.field input,
.field select {
  width: 100%;
  border: 1px solid #626167;
  border-radius: 3px;
  background: var(--bg);
  color: var(--text);
  padding: 10px 12px;
  min-width: 0;
}
.filter-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.filters .reset {
  background: transparent;
  color: var(--text);
  border: 0;
  cursor: pointer;
  text-decoration: underline;
  padding: 8px;
}
.result-line {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.exercise-card {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color 0.15s;
}
.exercise-card:hover {
  border-color: #925058;
}
.exercise-card > a {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
}
.card-art {
  width: 100%;
  height: 190px;
  object-fit: contain;
  background: #141416;
  object-position: center;
}
.card-rule {
  display: block;
  height: 5px;
  background: linear-gradient(90deg, var(--red-dark), transparent);
  margin: 24px 24px 0;
}
.card-copy {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
  align-items: start;
}
.card-copy .eyebrow {
  font-size: 0.65rem;
  margin: 0 0 12px;
}
.card-copy h2 {
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin: 0 0 12px;
}
.card-copy p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 24px;
}
.card-copy .text-link {
  margin-top: auto;
  font-size: 0.8rem;
}
.notice {
  border-left: 3px solid #ae535b;
  background: var(--surface);
  padding: 18px 22px;
  font-size: 0.9rem;
  color: #d1cdc7;
  margin: 24px 0;
}
.empty {
  border: 1px solid var(--line);
  padding: 40px;
  text-align: center;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  font-size: 0.8rem;
  color: var(--muted);
}
.breadcrumb li + li:before {
  content: "/";
  margin-right: 9px;
  color: #777;
}
.detail-top {
  max-width: 950px;
}
.detail-top h1 {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
}
.detail-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.pill {
  border: 1px solid var(--line);
  padding: 5px 12px;
  font-size: 0.8rem;
  color: var(--muted);
  border-radius: 2px;
}
.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 64px;
  margin-top: 36px;
}
.prose {
  max-width: 780px;
}
.prose section {
  margin-bottom: 45px;
  scroll-margin-top: 24px;
}
.prose h2 {
  font-size: 1.7rem;
  margin-bottom: 20px;
}
.prose p,
.prose li {
  color: #d4d0ca;
  line-height: 1.85;
  font-size: 1.03rem;
}
.prose ol {
  padding-left: 26px;
}
.prose li {
  padding: 0 0 16px 8px;
}
.prose dt {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 16px;
}
.prose dd {
  margin: 4px 0 0;
}
.tech-art {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0;
}
.tech-art figure {
  margin: 0;
  min-width: 0;
}
.tech-art img {
  width: 100%;
  height: auto;
  background: #151517;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.tech-art figcaption {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 10px 0;
}
.image-note {
  font-size: 0.85rem;
  color: var(--muted);
}
.toc {
  border-top: 2px solid var(--red-dark);
  padding-top: 20px;
  align-self: start;
}
.toc h2 {
  font-size: 1rem;
  letter-spacing: 0;
}
.toc a {
  display: block;
  padding: 10px 0;
  color: var(--muted);
  font-size: 0.85rem;
}
.app-card {
  margin: 70px 0 10px;
  padding: 30px;
  border: 1px solid #75404a;
  background: linear-gradient(130deg, #331a20, #19191c 65%);
  display: flex;
  gap: 32px;
  align-items: center;
  justify-content: space-between;
}
.app-card h2 {
  font-size: 1.7rem;
}
.app-card p {
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 750px;
  margin: 0;
}
.app-card .button {
  flex-shrink: 0;
}
.support-box {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--surface);
  margin: 32px 0;
  max-width: 780px;
}
.support-box a {
  overflow-wrap: anywhere;
}
.site-footer {
  max-width: var(--max);
  margin: auto;
  padding: 48px 32px 22px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  color: var(--muted);
  font-size: 0.85rem;
}
.wordmark {
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.06em;
}
.wordmark span {
  font-weight: 400;
}
.site-footer nav {
  display: flex;
  gap: 12px;
  flex-direction: column;
  align-items: start;
}
.site-footer .fine {
  grid-column: 1/-1;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin: 0;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
[hidden] {
  display: none !important;
}
.hero h1 {
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.04;
}
@media (max-width: 1000px) {
  .filters {
    grid-template-columns: 2fr 1fr 1fr;
  }
  .filter-actions {
    grid-column: 1/-1;
  }
  .group-grid {
    grid-template-columns: repeat(5, 1fr);
  }
  .hero h1 {
    font-size: clamp(3.8rem, 8.5vw, 6rem);
  }
  .detail-grid {
    grid-template-columns: minmax(0, 1fr) 210px;
    gap: 35px;
  }
  .desktop-nav {
    gap: 20px;
  }
}
@media (max-width: 767px) {
  .site-header {
    padding: 16px 20px;
    flex-wrap: wrap;
    position: relative;
  }
  .desktop-nav {
    display: none;
  }
  .mobile-nav {
    display: block;
  }
  .mobile-nav summary {
    padding: 10px 14px;
    border: 1px solid var(--line);
    min-height: 44px;
    border-radius: 3px;
    font-size: 0.85rem;
  }
  .mobile-nav nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 18px 22px;
    background: #19191c;
    border: 1px solid var(--line);
    z-index: 3;
    display: grid;
    gap: 6px;
  }
  .mobile-nav nav a {
    padding: 10px 0;
    min-height: 44px;
    text-decoration: none;
  }
  .mobile-nav .language {
    border-left: 0;
    padding-left: 0;
  }
  .hero {
    padding: 38px 20px 0;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .hero h1 {
    font-size: clamp(3.3rem, 12.7vw, 5.8rem);
  }
  .hero-copy > p {
    font-size: 1rem;
    margin-top: 22px;
  }
  .hero-art {
    min-height: 240px;
    order: 1;
  }
  .hero-art img {
    width: 280px;
    max-width: 84vw;
  }
  .hero-art:before {
    width: 260px;
  }
  .hero-actions {
    margin-bottom: 12px;
  }
  .stats-bar {
    margin-top: 24px;
    gap: 12px;
    padding: 18px 0;
  }
  .stats-bar strong {
    font-size: 1.4rem;
  }
  .stats-bar span {
    font-size: 0.7rem;
  }
  .shell {
    padding: 48px 20px;
  }
  .section-head {
    display: block;
    margin-bottom: 24px;
  }
  .section-head .text-link {
    display: inline-block;
    margin-top: 14px;
  }
  .group-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
  .group-tile img {
    max-width: 130px;
  }
  .feature-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
  .card-copy {
    padding: 18px;
  }
  .card-copy h2 {
    font-size: 1.15rem;
  }
  .card-art {
    height: 165px;
  }
  .filters {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 14px;
  }
  .field:first-child {
    grid-column: 1/-1;
  }
  .filters .field {
    min-width: 0;
  }
  .field select {
    font-size: 0.85rem;
    padding: 10px 8px;
  }
  .filter-actions {
    flex-wrap: wrap;
  }
  .catalog-head h1 {
    font-size: 2.65rem;
  }
  .result-line {
    display: block;
  }
  .detail-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .toc {
    order: -1;
  }
  .toc nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
  }
  .toc a {
    padding: 8px 0;
  }
  .tech-art {
    gap: 10px;
  }
  .detail-top h1 {
    font-size: 2.5rem;
  }
  .app-card {
    padding: 24px;
    display: block;
    margin-top: 45px;
  }
  .app-card .button {
    margin-top: 22px;
  }
  .site-footer {
    grid-template-columns: 1fr;
    padding: 36px 20px 20px;
    gap: 24px;
  }
  .search-bar {
    padding: 8px;
    gap: 6px;
  }
  .search-bar .button {
    padding: 10px 14px;
    gap: 0;
  }
  .breadcrumb {
    font-size: 0.75rem;
  }
  .prose h2 {
    font-size: 1.5rem;
  }
  .prose p,
  .prose li {
    font-size: 1rem;
  }
}
@media (max-width: 430px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
  .card-art {
    height: 210px;
  }
  .hero-actions .button {
    padding: 11px 16px;
    gap: 12px;
  }
  .brand {
    font-size: 1rem;
  }
  .brand img {
    width: 38px;
    height: 38px;
  }
  .brand-sub {
    font-size: 0.58rem;
  }
  .hero .eyebrow {
    font-size: 0.62rem;
  }
  .support-box {
    padding: 20px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    transition: none !important;
    animation: none !important;
  }
}