:root {
  color-scheme: light dark;
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-primary: #9100ab;
  --color-primary-dark: #11007e;
  --color-text: #111827;
  --color-muted: #4b5563;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-strong: rgba(15, 23, 42, 0.18);
  --color-primary-ghost: rgba(145, 0, 171, 0.12);
  --color-primary-glow: rgba(145, 0, 171, 0.04);
  --color-focus: rgba(17, 0, 126, 0.4);
  --color-nav-default-bg: rgba(145, 0, 171, 0.06);
  --color-nav-default-border: rgba(15, 23, 42, 0.08);
  --color-select-icon: rgba(17, 0, 126, 0.7);
  --nav-control-width: clamp(90px, 14vw, 130px);
  --nav-controls-gap: 16px;
  --radius-base: 12px;
  --shadow-soft: 0 4px 24px rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] {
  --color-bg: #0b1120;
  --color-surface: #131a2b;
  --color-primary: #9100ab;
  --color-primary-dark: #caa9ff;
  --color-text: #f4f4ff;
  --color-muted: #c3c8dd;
  --color-border: rgba(148, 163, 184, 0.24);
  --color-border-strong: rgba(148, 163, 184, 0.36);
  --color-primary-ghost: rgba(145, 0, 171, 0.28);
  --color-primary-glow: rgba(17, 0, 126, 0.2);
  --color-focus: rgba(145, 0, 171, 0.55);
  --color-nav-default-bg: rgba(148, 163, 184, 0.12);
  --color-nav-default-border: rgba(148, 163, 184, 0.18);
  --color-select-icon: rgba(244, 244, 255, 0.8);
  --shadow-soft: 0 16px 40px rgba(2, 6, 23, 0.6);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-system);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 24px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "brand nav nav-controls";
  align-items: center;
  column-gap: 24px;
  row-gap: 12px;
}

.brand {
  grid-area: brand;
  font-weight: 600;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
}
.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.brand span {
  display: inline-block;
  font-weight: inherit;
}
.nav-links {
  display: flex;
  gap: 16px;
  flex-wrap: nowrap;
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: flex-start;
}

.nav-links a {
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 500;
  color: var(--color-muted);
  background-color: var(--color-nav-default-bg);
  border: 1px solid var(--color-nav-default-border);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus {
  background-color: var(--color-primary-ghost);
  color: var(--color-primary-dark);
  border-color: transparent;
}



.nav-actions {
  display: contents;
}

.nav-actions nav {
  grid-area: nav;
}

.nav-controls {
  grid-area: nav-controls;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--nav-controls-gap);
  min-width: calc(var(--nav-control-width) * 2 + var(--nav-controls-gap));
  flex-wrap: wrap;
}

.language-switcher,
.theme-switcher {
  display: grid;
  grid-template-columns: max-content auto;
  align-items: center;
  column-gap: 8px;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.language-switcher span,
.theme-switcher span {
  white-space: nowrap;
}

.language-switcher select,
.theme-switcher select {
  -webkit-appearance: none;
  appearance: none;
  border: 1px solid var(--color-nav-default-border);
  background-color: var(--color-nav-default-bg);
  color: var(--color-text);
  padding: 6px 40px 6px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  width: var(--nav-control-width);
  min-width: var(--nav-control-width);
  max-width: var(--nav-control-width);
  justify-self: end;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-select-icon) 50%), linear-gradient(-45deg, transparent 50%, var(--color-select-icon) 50%);
  background-position: right 18px center, right 12px center;
  background-size: 7px 7px, 7px 7px;
  background-repeat: no-repeat;
}
.language-switcher select option,
.theme-switcher select option {
  font-family: var(--font-system);
  font-size: 0.95rem;
}


.language-switcher select:hover,
.theme-switcher select:hover {
  background-color: var(--color-primary-ghost);
  border-color: transparent;
  color: var(--color-primary-dark);
}

.language-switcher select:focus,
.theme-switcher select:focus {
  background-color: var(--color-primary-ghost);
  border-color: transparent;
  color: var(--color-primary-dark);
  outline: 2px solid var(--color-focus);
  outline-offset: 1px;
}

.language-switcher select:disabled,
.theme-switcher select:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.nav-links a[aria-current="page"] {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: transparent;
}

main {
  padding: 48px 24px 72px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
}

.hero {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
  margin-bottom: 64px;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3rem);
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero p {
  margin: 0 0 24px;
  color: var(--color-muted);
  font-size: 1.1rem;
}

.hero-visual {
  background: linear-gradient(135deg, var(--color-primary-ghost), var(--color-primary-glow));
  border-radius: var(--radius-base);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual img {
  max-width: 100%;
  height: auto;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
  border: none;
  cursor: not-allowed;
  opacity: 0.7;
}

.features {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 64px;
}

.feature-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-base);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
}

section + section {
  margin-top: 48px;
}

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 24px;
}

footer .footer-content {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--color-muted);
}

@media (max-width: 900px) {
  .navbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand brand"
      "nav nav-controls";
    align-items: center;
    row-gap: 16px;
  }
  .brand {
    justify-self: flex-start;
  }
  .nav-actions nav {
    width: min(100%, 520px);
  }
  .nav-controls {
    min-width: 0;
    justify-content: flex-end;
  }
}

@media (max-width: 600px) {
  .navbar {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "brand"
      "nav"
      "nav-controls";
  }
  .nav-controls {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    min-width: 0;
    gap: 12px;
    justify-content: flex-start;
  }
  .language-switcher,
  .theme-switcher {
    width: 100%;
    grid-template-columns: minmax(88px, 32%) 1fr;
    row-gap: 6px;
    align-items: center;
  }
  .language-switcher span,
  .theme-switcher span {
    white-space: normal;
  }
  .language-switcher select,
  .theme-switcher select {
    width: 100%;
    min-width: 0;
    max-width: none;
    justify-self: stretch;
  }

  main {
    padding-top: 32px;
  }
}


dl {
  margin: 0;
}

dl dt {
  font-weight: 600;
  margin-top: 24px;
}

dl dt:first-of-type {
  margin-top: 0;
}

dl dd {
  margin: 8px 0 0;
  color: var(--color-muted);
}