:root {
  --color-bg: #fafaf8;
  --color-panel: #ffffff;
  --color-panel-alt: #f1f1ee;
  --color-border: #e4e4e0;
  --color-accent: #c2255c;
  --color-accent-dark: #9a1b49;
  --color-accent-soft: rgba(194, 37, 92, 0.1);
  --color-text: #151515;
  --color-muted: #6a6a68;
  --color-band: #111111;
  --color-on-accent: #ffffff;
  --color-on-band: #fafaf8;
  --color-success: #2e7d4f;
  --color-warning: #b7791f;
  --color-error: #d0342c;
  --color-shadow-soft: rgba(21, 21, 21, 0.04);
  --color-shadow-card: rgba(21, 21, 21, 0.1);
  --color-shadow-raised: rgba(21, 21, 21, 0.14);
  --color-shadow-device-in: rgba(21, 21, 21, 0.16);
  --color-shadow-device-out: rgba(21, 21, 21, 0.1);
  --color-shadow-accent: rgba(194, 37, 92, 0.28);
  --color-shadow-accent-hover: rgba(194, 37, 92, 0.34);
  --color-focus: rgba(194, 37, 92, 0.26);
  --color-overlay: rgba(17, 17, 17, 0.48);

  --font-display: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Hiragino Sans', 'Apple SD Gothic Neo', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Hiragino Sans', 'Apple SD Gothic Neo', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --radius-xs: 8px;
  --radius-mark: 10px;
  --radius-control: 14px;
  --radius-card: 24px;
  --radius-screen: 24px;
  --radius-device: 36px;
  --radius-pill: 999px;

  --shadow-card: 0 18px 44px var(--color-shadow-card), 0 2px 6px var(--color-shadow-soft);
  --shadow-card-raised: 0 28px 64px var(--color-shadow-raised), 0 2px 6px var(--color-shadow-soft);
  --shadow-device: 0 24px 60px var(--color-shadow-device-in), 0 60px 120px var(--color-shadow-device-out);
  --shadow-button: 0 10px 24px var(--color-shadow-accent);
  --shadow-button-hover: 0 14px 30px var(--color-shadow-accent-hover);

  --content-width: 1200px;
  --reading-width: 780px;
  --header-width: 1280px;
  --header-height: 68px;
  --gutter: clamp(16px, 4vw, 32px);
  --section-space: clamp(72px, 10vw, 128px);
  --section-space-small: clamp(48px, 7vw, 88px);
  --control-height: 48px;
  --transition-fast: 150ms ease;
  --transition-reveal: 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  padding: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
aside,
nav,
header,
footer,
div {
  min-width: 0;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

ul,
ol {
  margin-top: 0;
}

ul[role='list'],
ol[role='list'],
.site-nav-list,
.footer-links,
.mobile-nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

p {
  margin-top: 0;
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
}

:not(pre) > code {
  overflow-wrap: anywhere;
  padding: 0.12em 0.34em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-alt);
  color: var(--color-text);
  font-size: 0.9em;
}

pre {
  display: block;
  max-width: 100%;
  margin: 1.5rem 0;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-band);
  color: var(--color-on-band);
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}

pre code {
  color: inherit;
  white-space: pre;
  overflow-wrap: normal;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-panel);
  color: var(--color-text);
}

th,
td {
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-panel-alt);
  color: var(--color-text);
  font-weight: 750;
}

hr {
  margin: var(--section-space-small) 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

::selection {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.wrap,
.reading-wrap,
.header-shell,
.footer-shell {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap {
  max-width: calc(var(--content-width) + var(--gutter) * 2);
}

.reading-wrap {
  max-width: calc(var(--reading-width) + var(--gutter) * 2);
}

.header-shell {
  max-width: min(100%, calc(var(--header-width) + var(--gutter) * 2));
}

.footer-shell {
  max-width: calc(var(--header-width) + var(--gutter) * 2);
}

.section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  overflow-x: clip;
}

.section-compact {
  padding-top: var(--section-space-small);
  padding-bottom: var(--section-space-small);
  overflow-x: clip;
}

.section-panel {
  background: var(--color-panel);
  color: var(--color-text);
}

.section-muted {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.section-band {
  padding-top: clamp(88px, 10vw, 120px);
  padding-bottom: clamp(92px, 11vw, 128px);
  background: var(--color-band);
  color: var(--color-on-band);
}

.section-band a {
  color: var(--color-on-band);
}

.section-band .muted {
  color: var(--color-on-band);
  opacity: 0.72;
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  line-height: 1.15;
  text-wrap: balance;
}

h1,
.display-title {
  margin-bottom: 22px;
  font-size: clamp(34px, 3.4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(21px, 2vw, 28px);
  font-weight: 750;
  letter-spacing: -0.015em;
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 750;
}

.section-band h1,
.section-band h2,
.section-band h3,
.section-band h4 {
  color: var(--color-on-band);
}

.no-break,
.title-phrase {
  white-space: nowrap;
}

.lead {
  max-width: 850px;
  color: var(--color-muted);
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.75;
}

.muted {
  color: var(--color-muted);
}

.mono {
  font-family: var(--font-mono);
}

.text-center {
  text-align: center;
}

.centered-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.keyword-mark {
  display: inline-block;
  margin-inline: 0.02em;
  padding-inline: 0.3em;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-on-accent);
  line-height: 1.16;
  vertical-align: -0.04em;
  white-space: nowrap;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: 100%;
  margin: 0;
  padding: 5px 14px 5px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.eyebrow-dot {
  position: relative;
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-accent);
}

.eyebrow-dot::after {
  position: absolute;
  inset: -4px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  content: '';
  opacity: 0;
  animation: status-breathe 2.4s ease-out infinite;
}

@keyframes status-breathe {
  0% {
    transform: scale(0.55);
    opacity: 0.7;
  }

  70%,
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button-row-center {
  justify-content: center;
}

.btn {
  display: inline-flex;
  min-height: var(--control-height);
  align-items: center;
  justify-content: center;
  gap: 9px;
  max-width: 100%;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  text-align: center;
  text-decoration: none;
  font-size: 15px;
  font-weight: 750;
  line-height: 1.2;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
}

.btn-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-on-accent);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  color: var(--color-on-accent);
  box-shadow: var(--shadow-button-hover);
  transform: translateY(-1px);
}

.btn-secondary,
.btn-ghost {
  border-color: var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
}

.btn-secondary:hover,
.btn-ghost:hover {
  border-color: var(--color-muted);
  background: var(--color-panel);
  color: var(--color-text);
  transform: translateY(-1px);
}

.btn[aria-disabled='true'],
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}

.card,
.panel {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  color: var(--color-text);
}

.card {
  padding: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow-card);
}

.card-flat {
  box-shadow: none;
}

.card-raised {
  box-shadow: var(--shadow-card-raised);
}

.card > :last-child,
.panel > :last-child {
  margin-bottom: 0;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 24px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.prose > * {
  max-width: 100%;
}

.prose h2 {
  margin-top: 2.8em;
}

.prose h3 {
  margin-top: 2em;
}

.prose p,
.prose li {
  overflow-wrap: break-word;
}

.prose a {
  font-weight: 650;
}

.prose blockquote {
  margin-inline: 0;
}

.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--transition-reveal),
    transform var(--transition-reveal);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

.tilt-soft {
  transform: rotate(-0.45deg);
}

.site-header {
  position: relative;
  z-index: 50;
  height: var(--header-height);
  background: var(--color-bg);
  color: var(--color-text);
}

.site-header-row {
  display: flex;
  height: var(--header-height);
  align-items: center;
  gap: 28px;
}

.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.site-brand:hover {
  color: var(--color-text);
}

.site-brand img,
.preview-brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: var(--radius-mark);
}

.preview-brand-mark {
  position: relative;
  overflow: hidden;
  background: var(--color-text);
}

.preview-brand-mark::after {
  position: absolute;
  inset: 11px;
  border-radius: 50%;
  background: var(--color-accent);
  content: '';
}

.desktop-nav {
  display: flex;
  min-width: 0;
  align-items: center;
  margin-left: auto;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 7px;
  padding: 8px 11px;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  text-decoration: none;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 650;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.site-nav-link svg {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.site-nav-link:hover {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.site-nav-link[aria-current='page'] {
  color: var(--color-text);
}

.header-tools {
  position: relative;
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
}

.language-button,
.menu-toggle {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text);
}

.language-button {
  gap: 7px;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 650;
  white-space: nowrap;
}

.language-button-caret {
  color: var(--color-muted);
  font-size: 10px;
}

.language-short {
  display: none;
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 63;
  width: 180px;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-panel);
  color: var(--color-text);
  box-shadow: var(--shadow-card);
}

.language-menu[hidden] {
  display: none;
}

.language-menu a {
  display: flex;
  min-height: 42px;
  align-items: center;
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  color: var(--color-text);
  text-decoration: none;
  font-size: 14px;
}

.language-menu a:hover,
.language-menu a[aria-current='true'] {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.menu-toggle {
  display: none;
  min-width: 44px;
  padding: 0;
}

.menu-toggle-lines,
.menu-toggle-lines::before,
.menu-toggle-lines::after {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
}

.menu-toggle-lines {
  position: relative;
}

.menu-toggle-lines::before,
.menu-toggle-lines::after {
  position: absolute;
  left: 0;
  content: '';
}

.menu-toggle-lines::before {
  top: -6px;
}

.menu-toggle-lines::after {
  top: 6px;
}

.menu-toggle[aria-expanded='true'] .menu-toggle-lines {
  background: transparent;
}

.menu-toggle[aria-expanded='true'] .menu-toggle-lines::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded='true'] .menu-toggle-lines::after {
  top: 0;
  transform: rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  left: 0;
  z-index: 61;
  max-height: calc(100dvh - var(--header-height));
  padding: 10px var(--gutter) 24px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
  box-shadow: var(--shadow-card);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-list a,
.mobile-language-list a {
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 12px;
  border-radius: var(--radius-control);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
}

.mobile-nav-list a:hover,
.mobile-nav-list a[aria-current='page'],
.mobile-language-list a:hover,
.mobile-language-list a[aria-current='true'] {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.mobile-nav-list svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mobile-language-label {
  margin: 16px 12px 5px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.mobile-language-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-veil {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 40;
  border: 0;
  background: var(--color-overlay);
}

.nav-veil[hidden] {
  display: none;
}

.site-footer {
  padding-top: 72px;
  padding-bottom: 28px;
  overflow-x: clip;
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr) minmax(0, 1.15fr) minmax(0, 0.8fr);
  gap: 48px;
}

.footer-brand-copy {
  max-width: 340px;
  margin-top: 18px;
  color: var(--color-muted);
}

.footer-heading {
  margin-bottom: 14px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 800;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  color: var(--color-muted);
  text-decoration: none;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--color-accent-dark);
}

.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 13px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal a {
  color: var(--color-muted);
  text-decoration: none;
}

@media (max-width: 1080px) {
  .desktop-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

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

@media (max-width: 768px) {
  h1,
  .display-title {
    font-size: clamp(24px, 7vw, 30px);
    line-height: 1.15;
  }

  h2 {
    font-size: clamp(24px, 6.4vw, 32px);
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .section-compact {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 20px;
  }

  .tilt-soft,
  [class*='tilt'] {
    transform: none;
  }

  .site-brand {
    gap: 9px;
    font-size: 15px;
  }

  .site-brand img,
  .preview-brand-mark {
    width: 32px;
    height: 32px;
  }

  .language-full {
    display: none;
  }

  .language-short {
    display: inline;
  }

  .language-button {
    min-width: 44px;
    padding-inline: 11px;
  }

  .button-row {
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .site-brand-text {
    max-width: 156px;
    white-space: normal;
    line-height: 1.2;
  }

  .btn {
    width: 100%;
  }
}

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

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}