:root {
  --page-bg: #f3efe4;
  --panel-bg: #fbf8f1;
  --line: #d9cfbc;
  --text: #2d231b;
  --muted: #7c6b59;
  --accent: #a1472d;
  --accent-dark: #73301f;
  --shadow: 0 18px 48px rgba(60, 39, 18, 0.08);
  --font-heading: 'Nunito Sans', Helvetica, Arial, sans-serif;
  --font-body: 'DM Sans', Helvetica, Arial, sans-serif;
  --font-ui: 'Nunito Sans', Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(161, 71, 45, 0.12), transparent 28%),
    linear-gradient(180deg, #f8f4eb 0%, var(--page-bg) 100%);
}

a {
  color: inherit;
}

h1 a,
h2 a,
h3 a,
h4 a,
h5 a,
h6 a {
  text-decoration: none;
}

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

.site-shell {
  width: min(1280px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.site-header {
  position: relative;
  padding: 1rem 0 2rem;
}

.site-header h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.site-header a {
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.language-nav {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0;
  position: absolute;
  top: 0;
  right: 0;
}

.language-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
  color: var(--muted);
  font: 600 0.72rem/1.2 var(--font-ui);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.language-nav__link:hover,
.language-nav__link.is-active {
  color: var(--accent-dark);
  background: #fffdf8;
  border-color: #c9b89f;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  color: var(--muted);
  font: 600 0.78rem/1.2 var(--font-ui);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--accent-dark);
  background: #fffdf8;
  border-color: #c9b89f;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font: 600 0.72rem/1.2 var(--font-ui);
}

.prototype-grid {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 1.5rem;
}

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

.prototype-sidebar,
.prototype-main {
  background: rgba(251, 248, 241, 0.88);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.prototype-sidebar {
  position: sticky;
  top: 1rem;
  align-self: start;
  padding: 1.25rem;
}

.prototype-sidebar h2 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.sidebar-count {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.car-grid-panel {
  margin: 0;
}

.car-grid-panel__summary {
  display: none;
}

.car-grid-panel__summary::-webkit-details-marker {
  display: none;
}

.car-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 3px;
  max-height: 65vh;
  overflow-y: auto;
}

.car-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  font: 600 0.6rem/1 var(--font-ui);
  border-radius: 5px;
  text-decoration: none;
  cursor: default;
}

.car-cell--unknown {
  color: var(--line);
  background: transparent;
}

.car-cell--known {
  color: var(--accent-dark);
  background: rgba(161, 71, 45, 0.1);
  border: 1px solid rgba(161, 71, 45, 0.25);
  cursor: pointer;
}

.car-cell--known:hover {
  background: rgba(161, 71, 45, 0.2);
  border-color: var(--accent);
  color: var(--accent-dark);
}

.car-cell--known.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-dark);
}

.prototype-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  max-height: 72vh;
  overflow: auto;
}

.prototype-nav a {
  display: grid;
  gap: 0.1rem;
  padding: 0.7rem 0.8rem;
  border-radius: 14px;
  text-decoration: none;
  border: 1px solid transparent;
}

.prototype-nav a:hover,
.prototype-nav a.is-active {
  border-color: var(--line);
  background: #fffdf8;
}

.prototype-number {
  font: 600 0.78rem/1.2 var(--font-ui);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prototype-title {
  color: var(--muted);
  font-size: 0.92rem;
}

.prototype-main {
  padding: 1.5rem;
}

.section-intro h2,
.article-page h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 2.8vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-intro p,
.empty-state {
  max-width: 70ch;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.75;
}

.article-page__intro,
.article-page__text {
  max-width: 70ch;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: clamp(1.2rem, 1.2vw + 0.9rem, 1.45rem);
  line-height: 1.85;
}

.article-feed {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.article-card {
  display: grid;
  grid-template-columns: minmax(180px, 280px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 1rem;
  border-radius: 20px;
  background: #fffdf8;
  border: 1px solid var(--line);
}

.article-card__media {
  aspect-ratio: 4 / 3;
  align-self: start;
  background: #e8dcc6;
  border-radius: 14px;
  overflow: hidden;
}

.article-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card__placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 180px;
  color: var(--muted);
  font: 600 0.85rem/1.2 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.article-card__meta,
.article-page__date {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  color: var(--muted);
  font: 600 0.8rem/1.2 var(--font-ui);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-card h2 {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.article-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.article-card__link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
}

.article-page__cover {
  margin: 1.25rem 0;
  min-height: 240px;
  aspect-ratio: 16 / 9;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.article-page__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.prototype-grid--single .article-page__cover {
  min-height: 320px;
  aspect-ratio: 3 / 2;
}

.article-page__text p:first-child {
  margin-top: 0;
}

@media (max-width: 960px) {
  .prototype-grid {
    grid-template-columns: 1fr;
  }

  .prototype-sidebar {
    position: static;
  }

  .prototype-nav {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    max-height: none;
  }

  .prototype-sidebar h2 {
    margin-bottom: 0.7rem;
  }

  .car-grid-panel {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fffdf8;
  }

  .car-grid-panel__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.8rem 0.95rem;
    cursor: pointer;
    list-style: none;
  }

  .car-grid-panel__summary::after {
    content: '+';
    flex-shrink: 0;
    color: var(--accent-dark);
    font: 700 1rem/1 var(--font-ui);
  }

  .car-grid-panel[open] .car-grid-panel__summary::after {
    content: '-';
  }

  .car-grid-panel__title {
    color: var(--text);
    font: 700 0.82rem/1.2 var(--font-ui);
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .car-grid-panel__hint {
    color: var(--muted);
    font: 600 0.72rem/1.2 var(--font-ui);
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .car-grid-panel .car-grid {
    padding: 0 0.95rem 0.95rem;
  }
}

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

  .car-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .language-nav {
    position: static;
    margin-top: 0.75rem;
  }

  .prototype-main,
  .prototype-sidebar {
    border-radius: 18px;
  }

  .article-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .car-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 400px) {
  .car-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .car-cell {
    font-size: 0.55rem;
  }
}