/*
 * Studje80 — feuille de style commune.
 * Direction visuelle « rétro-arcade néon » tirée du logo : nuit étoilée, néons cyan / violet /
 * orange, grille en perspective. Le texte courant reste en police système, sur fond sombre et
 * très contrasté, pour la lisibilité des pages de confidentialité.
 */

/* ---------- Police de titre (Orbitron, SIL Open Font License 1.1, voir fonts/OFL-Orbitron.txt) ---------- */

@font-face {
  font-family: 'Orbitron';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/assets/fonts/orbitron-latin-500-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Orbitron';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/assets/fonts/orbitron-latin-700-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Orbitron';
  font-style: normal;
  font-weight: 900;
  font-display: swap;
  src: url('/assets/fonts/orbitron-latin-900-normal.woff2') format('woff2');
}

/* ---------- Jetons de conception ---------- */

:root {
  --color-bg: #060818;
  --color-bg-deep: #03040d;
  --color-surface: rgba(18, 22, 52, 0.78);
  --color-surface-solid: #12163a;
  --color-border: #2b3378;
  --color-text: #eceeff;
  --color-text-muted: #aeb4dc;
  --color-heading: #ffffff;

  --neon-cyan: #3fe0ff;
  --neon-violet: #9b5cff;
  --neon-magenta: #e04dff;
  --neon-orange: #ffa630;

  --color-link: #7fe9ff;
  --color-link-hover: #ffffff;
  --color-focus: #ffa630;

  --glow-cyan: 0 0 6px rgba(63, 224, 255, 0.55), 0 0 18px rgba(63, 224, 255, 0.25);
  --glow-violet: 0 0 8px rgba(155, 92, 255, 0.55), 0 0 24px rgba(224, 77, 255, 0.25);
  --glow-orange: 0 0 8px rgba(255, 166, 48, 0.55), 0 0 20px rgba(255, 166, 48, 0.25);

  --font-display: 'Orbitron', 'Segoe UI', system-ui, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 1.0625rem;
  --line-height: 1.7;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;

  --radius: 0.9rem;
  --content-width: 46rem;
  --wide-width: 72rem;

  color-scheme: dark;
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--color-bg-deep);
}

body {
  position: relative;
  margin: 0;
  min-height: 100vh;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  background:
    radial-gradient(60rem 30rem at 15% -10%, rgba(155, 92, 255, 0.28), transparent 70%),
    radial-gradient(50rem 28rem at 95% 0%, rgba(63, 224, 255, 0.18), transparent 70%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-deep) 100%);
  background-attachment: fixed;
}

/* Ciel étoilé discret, purement décoratif */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255, 255, 255, 0.7), transparent 60%),
    radial-gradient(1px 1px at 28% 72%, rgba(255, 255, 255, 0.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 47% 35%, rgba(127, 233, 255, 0.8), transparent 60%),
    radial-gradient(1px 1px at 63% 12%, rgba(255, 255, 255, 0.6), transparent 60%),
    radial-gradient(1.5px 1.5px at 78% 58%, rgba(224, 77, 255, 0.7), transparent 60%),
    radial-gradient(1px 1px at 90% 28%, rgba(255, 255, 255, 0.5), transparent 60%),
    radial-gradient(1px 1px at 8% 88%, rgba(255, 255, 255, 0.4), transparent 60%),
    radial-gradient(1px 1px at 55% 92%, rgba(255, 255, 255, 0.4), transparent 60%);
  background-size: 640px 640px;
}

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

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -4rem;
  z-index: 10;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-solid);
  color: var(--color-link);
  border: 1px solid var(--neon-cyan);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: var(--space-3);
}

a {
  color: var(--color-link);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color 0.15s ease, text-shadow 0.15s ease;
}

a:hover {
  color: var(--color-link-hover);
  text-shadow: var(--glow-cyan);
}

a:focus-visible,
.button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

code {
  font-size: 0.9em;
  padding: 0.05em 0.35em;
  border-radius: 0.3em;
  background: rgba(63, 224, 255, 0.1);
  color: #c9f6ff;
}

/* ---------- En-tête et pied de page ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(6, 8, 24, 0.82);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), var(--neon-orange), transparent) 1;
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
}

.brand {
  display: inline-flex;
  line-height: 0;
}

.brand img {
  display: block;
  width: auto;
  height: 2.4rem;
  /* Le fond nuit du logo se fond dans l'en-tête sombre */
  mix-blend-mode: screen;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}

.site-footer {
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  background: rgba(3, 4, 13, 0.6);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3);
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li,
.site-nav li + li {
  margin-top: 0;
}

.site-footer p {
  margin: 0;
}

/* ---------- Contenu ---------- */

main {
  display: block;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-3) 0;
}

main.wide {
  max-width: var(--wide-width);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  color: var(--color-heading);
  line-height: 1.25;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 var(--space-3);
  font-size: clamp(1.55rem, 1.1rem + 2.2vw, 2.4rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-violet) 55%, var(--neon-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 10px rgba(155, 92, 255, 0.45));
}

h2 {
  margin: var(--space-5) 0 var(--space-2);
  font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.25rem);
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}

h3 {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
  font-weight: 700;
}

p,
ul,
ol,
dl {
  margin: 0 0 var(--space-3);
}

ul,
ol {
  padding-left: 1.25em;
}

li + li {
  margin-top: var(--space-1);
}

li::marker {
  color: var(--neon-magenta);
}

strong {
  color: var(--color-heading);
}

.meta {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon-orange);
  text-shadow: var(--glow-orange);
}

/* Encadré « En résumé » : bordure néon dégradée */
.summary {
  position: relative;
  margin: var(--space-4) 0;
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: 0 0 0 1px rgba(63, 224, 255, 0.35), 0 0 24px rgba(155, 92, 255, 0.18);
}

.summary::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  border-radius: var(--radius) 0 0 var(--radius);
  background: linear-gradient(180deg, var(--neon-cyan), var(--neon-magenta));
  box-shadow: var(--glow-violet);
}

.summary h2 {
  margin-top: 0;
}

.summary p:last-child {
  margin-bottom: 0;
}

.lang-switch {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
}

.lang-switch li + li {
  margin-top: 0;
}

.lang-switch a {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  text-decoration: none;
}

.lang-switch a:hover {
  border-color: var(--neon-cyan);
}

/* Cartes */
.card-list {
  display: grid;
  gap: var(--space-3);
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
}

.card-list li + li {
  margin-top: 0;
}

.card,
.card-list li {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover,
.card-list li:hover {
  border-color: rgba(63, 224, 255, 0.7);
  box-shadow: 0 0 22px rgba(63, 224, 255, 0.15);
}

.card-list a {
  font-weight: 600;
}

/* Boutons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.button--primary {
  color: #050716;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-violet));
  box-shadow: var(--glow-violet);
}

.button--primary:hover {
  color: #050716;
  text-shadow: none;
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(63, 224, 255, 0.7), 0 0 30px rgba(155, 92, 255, 0.45);
}

.button--text {
  text-transform: none;
  letter-spacing: 0.02em;
  font-family: var(--font-body);
  font-size: 1rem;
}

.button--ghost {
  color: var(--neon-cyan);
  border: 1px solid var(--neon-cyan);
  background: rgba(63, 224, 255, 0.06);
}

.button--ghost:hover {
  color: #ffffff;
  background: rgba(63, 224, 255, 0.16);
  box-shadow: var(--glow-cyan);
}

.badge {
  display: inline-block;
  padding: 0.1rem 0.65rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neon-orange);
  border: 1px solid rgba(255, 166, 48, 0.7);
  background: rgba(255, 166, 48, 0.08);
}

/* ---------- Accueil ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-4) var(--space-3) var(--space-6);
  text-align: center;
  isolation: isolate;
}

/* Sol en grille rétro, en perspective */
.hero::after {
  content: '';
  position: absolute;
  left: -50%;
  right: -50%;
  bottom: 0;
  z-index: -1;
  height: 22rem;
  background-image:
    linear-gradient(rgba(224, 77, 255, 0.7) 2px, transparent 2px),
    linear-gradient(90deg, rgba(63, 224, 255, 0.6) 2px, transparent 2px);
  background-size: 56px 56px;
  transform: perspective(260px) rotateX(58deg);
  transform-origin: center bottom;
  -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.6) 35%, transparent 80%);
  mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.6) 35%, transparent 80%);
  animation: grid-scroll 6s linear infinite;
}

@keyframes grid-scroll {
  from {
    background-position: 0 0, 0 0;
  }
  to {
    background-position: 0 56px, 0 0;
  }
}

.hero__logo {
  display: block;
  width: min(100%, 52rem);
  margin: 0 auto var(--space-3);
  /* Le fond nuit du logo se fond dans la page : fusion « écran » + fondu des bords */
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(ellipse 62% 64% at 50% 50%, #000 45%, transparent 78%);
  mask-image: radial-gradient(ellipse 62% 64% at 50% 50%, #000 45%, transparent 78%);
}

.hero h1 {
  max-width: 40rem;
  margin-inline: auto;
}

.hero__lead {
  max-width: 38rem;
  margin: 0 auto var(--space-4);
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.section {
  margin-top: var(--space-6);
}

.section > h2:first-child,
.eyebrow + h2,
.feature h2 {
  margin-top: 0;
}

.feature {
  display: grid;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: calc(var(--radius) * 1.4);
  box-shadow: 0 0 0 1px rgba(155, 92, 255, 0.45), 0 0 40px rgba(155, 92, 255, 0.18);
}

.feature__icon {
  width: 7rem;
  height: 7rem;
  border-radius: 1.6rem;
  box-shadow: 0 0 0 1px rgba(63, 224, 255, 0.5), var(--glow-cyan);
}

.feature h3 {
  font-size: 1.5rem;
}

.feature__tagline {
  font-weight: 600;
  color: var(--color-heading);
}

.feature__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

@media (min-width: 40rem) {
  .feature {
    grid-template-columns: auto 1fr;
    padding: var(--space-5);
  }
}

.tiles {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.tiles li + li {
  margin-top: 0;
}

.tile {
  position: relative;
  height: 100%;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.tile::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.tile--cyan::before {
  background: var(--neon-cyan);
  box-shadow: var(--glow-cyan);
}

.tile--violet::before {
  background: var(--neon-magenta);
  box-shadow: var(--glow-violet);
}

.tile--orange::before {
  background: var(--neon-orange);
  box-shadow: var(--glow-orange);
}

.tile p {
  margin: 0;
  color: var(--color-text-muted);
}

.contact-band {
  margin-top: var(--space-6);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  border-radius: calc(var(--radius) * 1.4);
  background:
    linear-gradient(135deg, rgba(63, 224, 255, 0.12), rgba(224, 77, 255, 0.12)),
    var(--color-surface);
  box-shadow: 0 0 0 1px rgba(63, 224, 255, 0.35);
}

.contact-band h2 {
  margin-top: 0;
}

/* ---------- Page 404 ---------- */

.game-over {
  padding-top: var(--space-6);
  text-align: center;
}

.game-over h1 {
  font-size: clamp(2.2rem, 1.4rem + 4vw, 4rem);
  background: linear-gradient(90deg, var(--neon-orange), var(--neon-magenta));
  -webkit-background-clip: text;
  background-clip: text;
}

.game-over__en {
  margin-top: var(--space-5);
}

.blink {
  animation: blink 1.2s steps(2, start) infinite;
}

@keyframes blink {
  to {
    visibility: hidden;
  }
}

/* ---------- Accessibilité : animations réduites ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ---------- Impression : version sobre et lisible ---------- */

@media print {
  body,
  html {
    background: #fff !important;
    color: #000;
  }

  body::before,
  .skip-link,
  .site-nav,
  .site-footer {
    display: none;
  }

  .site-header {
    position: static;
    background: none;
    border: 0;
  }

  .brand img {
    mix-blend-mode: normal;
  }

  h1,
  h2 {
    color: #000;
    background: none;
    filter: none;
    text-shadow: none;
    -webkit-text-fill-color: #000;
  }

  .summary,
  .card,
  .card-list li {
    background: none;
    box-shadow: none;
    border: 1px solid #999;
  }

  a {
    color: #000;
  }
}