/* ── YUGNAT999 — shared styles ─────────────────────────────────────────── */

/* ── Language visibility ──────────────────────────────────────────────── */
html[data-lang="fr"] [data-en]{display:none !important;}
html[data-lang="en"] [data-fr]{display:none !important;}

/* ── Design tokens ────────────────────────────────────────────────────── */
:root{
  --bg:#f6f6f6;
  --paper:#ffffff;
  --ink:#0b0b0b;
  --ink2:rgba(0,0,0,0.62);
  --ink3:rgba(0,0,0,0.38);
  --border:rgba(0,0,0,0.18);
  --border2:rgba(0,0,0,0.32);
  --shadow:rgba(0,0,0,0.10);
  --spring:cubic-bezier(0.16,1,0.3,1);
}
html[data-theme="dark"]{
  --bg:#0b0b0b;
  --paper:#111111;
  --ink:#f6f6f6;
  --ink2:rgba(255,255,255,0.72);
  --ink3:rgba(255,255,255,0.42);
  --border:rgba(255,255,255,0.18);
  --border2:rgba(255,255,255,0.32);
  --shadow:rgba(0,0,0,0.42);
}

/* ── Base reset ───────────────────────────────────────────────────────── */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'DM Mono', monospace;
  overflow:hidden;
  transition: background 0.25s var(--spring), color 0.25s var(--spring);
}

/* ── Grain overlay ────────────────────────────────────────────────────── */
body::after{
  content:'';
  position:fixed; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='340' height='340'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='340' height='340' filter='url(%23g)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events:none; z-index:9998;
  mix-blend-mode:multiply;
  opacity:0.55;
}
html[data-theme="dark"] body::after{ mix-blend-mode:screen; opacity:0.30; }

/* ── Decorative frame ─────────────────────────────────────────────────── */
.frame{
  position:fixed; inset:20px;
  border:1px solid var(--border);
  background:linear-gradient(180deg, rgba(255,255,255,0.72), rgba(255,255,255,0.45));
  pointer-events:none;
  z-index:1;
}
html[data-theme="dark"] .frame{
  background:linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.18));
}

/* ── Top bar (sub-pages) ──────────────────────────────────────────────── */
.topbar{
  position:fixed; top:18px; left:18px; right:18px;
  z-index:50;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 12px;
  background:rgba(255,255,255,0.60);
  border:1px solid var(--border);
  backdrop-filter:blur(6px);
}
html[data-theme="dark"] .topbar{ background:rgba(0,0,0,0.34); }

/* ── Brand ────────────────────────────────────────────────────────────── */
.brand{
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
  white-space:nowrap;
  font-size:0.9rem;
}

/* ── Navigation ───────────────────────────────────────────────────────── */
.nav{ display:flex; gap:14px; align-items:center; overflow:auto hidden; }
.nav a{
  text-decoration:none;
  color:var(--ink2);
  font-size:0.62rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  padding:6px 0;
  border-bottom:1px solid transparent;
  white-space:nowrap;
}
.nav a.active{ color:var(--ink); border-bottom-color:var(--ink); }
.nav a:hover{ color:var(--ink); }

/* ── Segment control ──────────────────────────────────────────────────── */
.switches{ display:flex; gap:10px; align-items:center; }
.seg{
  display:inline-flex;
  border:1px solid var(--border2);
  background:rgba(255,255,255,0.50);
  backdrop-filter:blur(6px);
}
html[data-theme="dark"] .seg{ background:rgba(0,0,0,0.32); }
.seg button{
  appearance:none; border:0; margin:0;
  background:transparent;
  color:var(--ink);
  padding:8px 10px;
  font:400 12px/1 'DM Mono', monospace;
  letter-spacing:0.18em;
  text-transform:uppercase;
  cursor:pointer;
  transition: background 0.18s var(--spring), color 0.18s var(--spring), transform 0.10s var(--spring);
}
.seg button + button{ border-left:1px solid var(--border2); }
.seg button[aria-pressed="true"]{ background:var(--ink); color:var(--paper); }
.seg button:active{ transform:scale(0.88); }

/* ── Mobile "← Home" link ─────────────────────────────────────────────── */
.mobile-home{
  display:none;
  text-decoration:none;
  color:var(--ink2);
  font-size:0.56rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  white-space:nowrap;
  opacity:0.9;
  border-bottom:1px solid transparent;
  transition: opacity 0.12s var(--spring);
}
.mobile-home:hover{ color:var(--ink); opacity:1; }
.mobile-home:active{ opacity:0.4; }
html[data-theme="dark"] .mobile-home{ color:var(--ink2); }
@media (max-width:980px){
  .mobile-home{ display:inline-flex; align-items:center; padding:6px 0; }
}

/* ── Skip navigation ──────────────────────────────────────────────────── */
.skip-nav{
  position:fixed;
  top:-100px;
  left:18px;
  z-index:9999;
  background:var(--ink);
  color:var(--paper);
  padding:10px 16px;
  font:400 12px/1 'DM Mono', monospace;
  letter-spacing:0.18em;
  text-transform:uppercase;
  text-decoration:none;
  border:1px solid var(--border2);
  transition:top 0.18s var(--spring);
}
.skip-nav:focus{ top:18px; outline:none; }

/* ── Main content area ────────────────────────────────────────────────── */
main{
  position:fixed;
  inset:0;
  padding:120px 18px 54px;
  z-index:10;
  overflow:auto;
  max-width:1200px;
  margin:0 auto;
}

/* ── Card ─────────────────────────────────────────────────────────────── */
.card{
  max-width:780px;
  margin:0 auto;
  background:rgba(255,255,255,0.55);
  border:1px solid var(--border);
  backdrop-filter:blur(6px);
  padding:18px 18px 16px;
}
html[data-theme="dark"] .card{ background:rgba(0,0,0,0.30); }

/* ── Panel ────────────────────────────────────────────────────────────── */
.panel{
  background:rgba(255,255,255,0.55);
  border:1px solid var(--border);
  backdrop-filter:blur(6px);
  overflow:hidden;
}
html[data-theme="dark"] .panel{ background:rgba(0,0,0,0.30); }
.panel-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  border-bottom:1px solid var(--border);
  font-size:0.62rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--ink3);
}
.panel-head a{ color:var(--ink); text-decoration:none; opacity:0.75; border-bottom:1px solid transparent; transition:opacity 0.12s var(--spring); }
.panel-head a:hover{ opacity:1; border-color:var(--border2); }
.panel-head a:active{ opacity:0.35; }

/* ── Grid ─────────────────────────────────────────────────────────────── */
.grid{
  display:grid;
  gap:16px;
  margin-top:16px;
  grid-template-columns:1fr;
}
@media (min-width:980px){
  .grid.two{ grid-template-columns:1.35fr 0.65fr; align-items:start; }
  .grid.split{ grid-template-columns:1.2fr 0.8fr; align-items:start; }
  .grid.three{ grid-template-columns:1fr 1fr 1fr; }
}

/* ── Typography helpers ───────────────────────────────────────────────── */
h1{
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  letter-spacing:0.06em;
  text-transform:uppercase;
  font-size:clamp(32px, 6vw, 56px);
  line-height:0.95;
  margin-bottom:12px;
}
.kicker{
  font-size:0.62rem;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--ink3);
  margin-top:4px;
}
.meta{
  font-size:0.62rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--ink3);
  margin-bottom:18px;
}
.meta-line{
  margin-top:10px;
  color:var(--ink3);
  font-size:0.62rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
}

/* ── Media helpers ────────────────────────────────────────────────────── */
.video{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  background:#000;
}
.video iframe{ position:absolute; inset:0; width:100%; height:100%; border:0; }
.imgwrap{
  position:relative;
  width:100%;
  aspect-ratio:4/5;
  background:#000;
}
.imgwrap img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; display:block; }

/* ── Button ───────────────────────────────────────────────────────────── */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--ink);
  color:var(--ink);
  text-decoration:none;
  padding:12px 16px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  font-size:0.62rem;
  background:rgba(255,255,255,0.65);
  transition: background 0.18s var(--spring), color 0.18s var(--spring), transform 0.12s var(--spring);
}
.btn:hover{ background:var(--ink); color:var(--paper); transform:translateY(-1px); }
.btn:active{ transform:scale(0.95); background:var(--ink); color:var(--paper); }
html[data-theme="dark"] .btn{ background:rgba(0,0,0,0.34); border-color:var(--paper); color:var(--paper); }
html[data-theme="dark"] .btn:hover{ background:var(--paper); color:var(--ink); }
html[data-theme="dark"] .btn:active{ background:var(--paper); color:var(--ink); }

/* ── Flip cards (Mirrors) ─────────────────────────────────────────────── */
.flip-card{
  border:1px solid var(--border);
  background:rgba(255,255,255,0.55);
  backdrop-filter:blur(6px);
  overflow:hidden;
  box-shadow:0 18px 48px var(--shadow);
  min-height:520px;
  position:relative;
  cursor:pointer;
  user-select:none;
  transition: transform 0.12s var(--spring), box-shadow 0.12s var(--spring);
}
.flip-card:active{ transform:scale(0.975); box-shadow:0 6px 18px var(--shadow); }
html[data-theme="dark"] .flip-card{ background:rgba(0,0,0,0.30); }
@media (max-width:520px){ .flip-card{ min-height:460px; } }
.flip-front, .flip-back{
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  transition:opacity 220ms var(--spring);
}
.flip-front{ opacity:1; }
.flip-front img{ width:100%; height:100%; object-fit:cover; display:block; }
.flip-back{
  opacity:0; pointer-events:none;
  background:#000; color:#fff;
  padding:22px 18px; text-align:left;
}
.flip-back, .flip-back *{ color:#fff !important; -webkit-text-fill-color:#fff !important; }
.caption{
  max-width:28ch;
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  font-size:clamp(1.05rem, 1.55vw, 1.35rem);
  line-height:1.04;
  letter-spacing:0.04em;
  text-transform:uppercase;
}
.flip-card.is-flipped .flip-front{ opacity:0; pointer-events:none; }
.flip-card.is-flipped .flip-back{ opacity:1; pointer-events:auto; }
@media (hover:hover) and (pointer:fine){
  .flip-card:hover .flip-front{ opacity:0; pointer-events:none; }
  .flip-card:hover .flip-back{ opacity:1; pointer-events:auto; }
}
.flip-card:focus-visible{ outline:2px solid var(--border2); outline-offset:4px; }

/* ── Sound toggle — improved visibility ───────────────────────────────── */
#ambientHum{ display:none; }
#soundToggle{
  position:fixed;
  right:14px;
  bottom:14px;
  z-index:9999;
  background:rgba(255,255,255,0.88);
  color:var(--ink);
  border:1px solid var(--border2);
  padding:6px 10px;
  font:400 10px/1 'DM Mono', monospace;
  letter-spacing:0.12em;
  text-transform:uppercase;
  cursor:pointer;
  opacity:0.85;
  backdrop-filter:blur(6px);
  transition: opacity 0.18s, background 0.18s var(--spring), color 0.18s var(--spring), transform 0.10s var(--spring);
  -webkit-appearance:none;
  appearance:none;
}
#soundToggle:hover,
#soundToggle:focus{
  opacity:1;
  background:var(--ink);
  color:var(--paper);
  outline:none;
}
#soundToggle:active{ transform:scale(0.86); opacity:1; }
html[data-theme="dark"] #soundToggle{
  background:rgba(0,0,0,0.72);
  color:var(--ink);
  border-color:var(--border2);
}

/* ── Touch UX ─────────────────────────────────────────────────────────── */
html{ scroll-behavior:smooth; }
a, button, [role="button"]{ -webkit-tap-highlight-color:transparent; }
a, button{ touch-action:manipulation; }

/* Minimum touch targets (WCAG 2.5.5 — 44×44px) */
.seg button{ min-height:44px; }
.btn{ min-height:44px; }
#soundToggle{ min-height:44px; min-width:44px; }
.mobile-home{ min-height:44px; display:inline-flex; align-items:center; }
.panel-head a{ min-height:44px; display:inline-flex; align-items:center; }
.flip-card{ touch-action:manipulation; }

/* ── Tablet (761–979px): nav visible → hide redundant back-link ───────── */
@media (min-width:761px) and (max-width:979px){
  .mobile-home{ display:none; }
  .nav{ gap:10px; }
  .nav a{ font-size:0.56rem; letter-spacing:0.14em; }
}

/* ── Mobile overrides (standard sub-pages, ≤760px) ───────────────────── */
@media (max-width:760px){
  body{ overflow:auto; }
  .nav{ display:none; }
  .topbar{ top:0; left:0; right:0; border:none; border-bottom:1px solid var(--border); padding:8px 12px; }
  .frame{ display:none; }
  main{ position:relative; inset:auto; padding:82px 12px 34px; }
  /* Move sound toggle to left so it doesn't overlap scrollbar */
  #soundToggle{ right:auto; left:14px; bottom:14px; }
  /* Tighter card/panel padding */
  .card{ padding:14px 12px; }
  .panel-head{ padding:10px 12px; }
  h1{ font-size:clamp(28px, 8vw, 48px); }
}

/* ── Very small screens (≤480px) ─────────────────────────────────────── */
@media (max-width:480px){
  .topbar{ gap:8px; }
  .brand{ font-size:0.78rem; letter-spacing:0.05em; }
  .mobile-home{ font-size:0.50rem; }
  .seg button{ padding:8px 8px; font-size:11px; letter-spacing:0.12em; }
  .switches{ gap:6px; }
  main{ padding:74px 10px 28px; }
  .caption{ font-size:1rem; }
  .flip-card{ min-height:380px; }
}

/* ── View Transitions API ─────────────────────────────────────────────── */
@view-transition { navigation: auto; }

@keyframes vt-fade-in  { from { opacity:0; translate:0 6px; } to { opacity:1; translate:none; } }
@keyframes vt-fade-out { from { opacity:1; translate:none; } to { opacity:0; translate:0 -6px; } }

::view-transition-old(root){
  animation: 180ms var(--spring) both vt-fade-out;
}
::view-transition-new(root){
  animation: 220ms var(--spring) 80ms both vt-fade-in;
}

@media (prefers-reduced-motion: reduce){
  ::view-transition-old(root),
  ::view-transition-new(root){ animation: none; }
}