:root {
  --bg-deep: #090e1a;
  --bg-cosmos: #101b34;
  --text-main: #f3f6ff;
  --text-soft: #b9c3e4;
  --accent-science: #52d6ff;
  --accent-ocean: #1f4e8c;
  --accent-solidarity: #f4c56a;

  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;

  --border-soft: 1px solid rgba(243, 246, 255, 0.16);
  --shadow-soft: 0 10px 34px rgba(2, 8, 20, 0.35);
  --grad-hero: linear-gradient(140deg, rgba(31, 78, 140, 0.45) 0%, rgba(82, 214, 255, 0.18) 100%);
  --grad-solidarity: linear-gradient(135deg, #f4c56a 0%, #e7a95a 100%);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  background:
    radial-gradient(1100px 560px at 8% -10%, rgba(82, 214, 255, 0.12), transparent 65%),
    radial-gradient(900px 500px at 95% 0%, rgba(31, 78, 140, 0.25), transparent 70%),
    var(--bg-deep);
  color: var(--text-main);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(9, 14, 26, 0.7);
  border-bottom: var(--border-soft);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
}

.logo {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.main-nav {
  display: flex;
  gap: 18px;
}

.main-nav a,
.site-footer a {
  color: var(--text-soft);
  text-decoration: none;
}

.main-nav a:hover,
.site-footer a:hover {
  color: var(--accent-science);
}

.section {
  padding: 88px 24px;
}

.section--soft {
  background: rgba(16, 27, 52, 0.35);
}

.hero {
  background: var(--grad-hero);
}

.hero-grid,
.impact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  color: var(--accent-science);
  font-weight: 600;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 14px;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3.3rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.lead {
  max-width: 60ch;
  color: var(--text-soft);
}

.section-heading {
  margin-bottom: 24px;
}

.split-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.card {
  background: rgba(16, 27, 52, 0.5);
  border: var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(6px);
  transition: transform 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.card-pad {
  padding: 20px;
}

.feature-card {
  padding: 22px;
}

.page-hero {
  padding-bottom: 72px;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(82, 214, 255, 0.45);
  box-shadow: 0 14px 36px rgba(10, 26, 52, 0.45);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.theme-card {
  color: inherit;
  text-decoration: none;
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
}

.steps li {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.steps a,
.card a {
  color: var(--accent-science);
  font-weight: 700;
  text-decoration: none;
}

.steps a:hover,
.card a:hover {
  text-decoration: underline;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
  color: var(--text-soft);
}

.animation-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.section--catalog {
  padding-top: 48px;
}

.catalog-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.catalog-content {
  min-width: 0;
}

.sticker-menu {
  position: sticky;
  top: 84px;
}

.facet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.facet-header h2,
.facet-block h3 {
  margin: 0;
}

.facet-block {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.facet-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.facet-button,
.column-switch button,
.text-button {
  border: 1px solid rgba(243, 246, 255, 0.2);
  background: rgba(243, 246, 255, 0.06);
  color: var(--text-main);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.facet-button,
.column-switch button {
  border-radius: 999px;
  padding: 8px 11px;
}

.text-button {
  border-radius: 8px;
  padding: 7px 10px;
}

.facet-button:hover,
.column-switch button:hover,
.text-button:hover,
.facet-button[aria-pressed="true"],
.column-switch button[aria-pressed="true"] {
  background: rgba(82, 214, 255, 0.18);
  border-color: rgba(82, 214, 255, 0.55);
  color: var(--accent-science);
}

.column-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.result-count {
  color: var(--text-soft);
  font-weight: 700;
  margin: 0;
}

.catalog-grid[data-columns="1"] {
  grid-template-columns: 1fr;
}

.catalog-grid[data-columns="2"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.catalog-grid[data-columns="3"] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.animation-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.animation-card p {
  margin: 0;
}

.animation-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
}

.animation-visual {
  position: relative;
  display: grid;
  min-height: 160px;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 26%, color-mix(in srgb, var(--visual-accent), #ffffff 18%) 0 8%, transparent 22%),
    linear-gradient(135deg, color-mix(in srgb, var(--visual-accent), #0b1324 42%), rgba(8, 14, 28, 0.96));
  isolation: isolate;
}

.animation-visual::before,
.animation-visual::after {
  position: absolute;
  content: "";
  border: 1px solid color-mix(in srgb, var(--visual-accent), #ffffff 30%);
  opacity: 0.65;
}

.animation-visual::before {
  width: 54%;
  aspect-ratio: 1;
  border-radius: 999px;
  transform: rotate(-18deg);
}

.animation-visual::after {
  inset: auto 12% 18% 20%;
  height: 34%;
  border-left: 0;
  border-right: 0;
  transform: skewY(-10deg);
}

.animation-visual span {
  position: relative;
  z-index: 1;
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: 800;
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.animation-visual--orbite::before {
  width: 68%;
  transform: rotate(-28deg) scaleY(0.48);
}

.animation-visual--reseau::before,
.animation-visual--graines::before {
  border-radius: 16px;
  transform: rotate(18deg);
}

.animation-visual--eclair::after,
.animation-visual--rayon::after {
  inset: 18% 46% 14% 46%;
  height: auto;
  background: color-mix(in srgb, var(--visual-accent), #ffffff 25%);
  border: 0;
  transform: skewX(-18deg);
}

.animation-id,
.status-note,
.animation-meta,
.animation-description {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(243, 246, 255, 0.16);
  border-radius: 999px;
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
  padding: 7px 10px;
}

.tag--rubrique {
  background: rgba(82, 214, 255, 0.14);
}

.tag--theme {
  background: rgba(244, 197, 106, 0.14);
}

.tag--niveau {
  background: rgba(243, 246, 255, 0.09);
}

.taxonomy-panel {
  max-width: 820px;
}

.empty-state {
  color: var(--text-soft);
}

code {
  color: var(--accent-solidarity);
}

.btn-primary,
.btn-donate,
.btn-secondary {
  display: inline-block;
  text-decoration: none;
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 600;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-ocean) 0%, var(--accent-science) 100%);
  color: #fff;
}

.btn-donate {
  background: var(--grad-solidarity);
  color: #1f1403;
  font-weight: 700;
}

.btn-secondary {
  color: var(--text-main);
  border: 1px solid rgba(243, 246, 255, 0.35);
}

.kpi {
  color: var(--accent-science);
  font-weight: 700;
  font-size: clamp(1.7rem, 2.8vw, 2.3rem);
  margin-right: 8px;
}

.impact-note {
  border-left: 3px solid var(--accent-solidarity);
  padding-left: 14px;
  color: var(--text-soft);
}

.faq-list {
  display: grid;
  gap: 12px;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

.site-footer {
  border-top: var(--border-soft);
  padding: 24px;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .main-nav {
    display: none;
  }

  .hero-grid,
  .impact-grid,
  .card-grid,
  .content-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .catalog-layout {
    grid-template-columns: 1fr;
  }

  .sticker-menu {
    position: static;
  }

  .catalog-grid[data-columns="3"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-heading {
    align-items: start;
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 18px;
  }

  .animation-list,
  .catalog-grid[data-columns="2"],
  .catalog-grid[data-columns="3"] {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}