:root{
    --edu-bg: #f6f4ee;
    --edu-blue: #1f3a5f;
    --edu-blue-dark: #142842;
    --edu-accent: #7c9c7a;
    --edu-ink: #24272b;
    --edu-line: #d8d3c6;

    --void: #05070a;
    --void-2: #0a0e14;
    --void-header: rgba(5,7,10,0.85);
    --phosphor: #b8f4e0;
    --phosphor-dim: #4a9c85;
    --ember: #ff5c38;
    --line-dim: #1c2530;

    --arc-fg-bright: #ffffff;
    --arc-fg: #f0f0f0;
    --arc-fg-mid: #9a9a9a;
    --arc-fg-dim: #7a7a7a;
    --arc-ink: #111111;
    --arc-accent: #b8f4e0;
    --arc-accent-strong: #ff5c38;
    --arc-accent-soft: #4a9c85;
    --arc-surface: #ffffff;
    --arc-surface-hover: #e8f7f1;
    --arc-ring: rgba(184,244,224,0.16);
    --arc-glow-ring: rgba(184,244,224,0.10);
  }

  html[data-theme="mono"]{
    --void:#0e0e0e; --void-2:#181818; --void-header:rgba(14,14,14,0.88); --line-dim:#2e2e2e;
    --phosphor:#f5f5f5; --phosphor-dim:#b0b0b0; --ember:#ffffff;
    --arc-fg-bright:#ffffff; --arc-fg:#f2f2f2; --arc-fg-mid:#c7c7c7; --arc-fg-dim:#8a8a8a; --arc-ink:#111111;
    --arc-accent:#ffffff; --arc-accent-strong:#ffffff; --arc-accent-soft:#b0b0b0;
    --arc-surface:#ffffff; --arc-surface-hover:#ececec;
    --arc-ring:rgba(255,255,255,0.14); --arc-glow-ring:rgba(255,255,255,0.08);
  }
  html[data-theme="blue"]{
    --void:#020b1c; --void-2:#041226; --void-header:rgba(2,11,28,0.88); --line-dim:#0d2040;
    --phosphor:#8fb4ff; --phosphor-dim:#3d7bff; --ember:#3d7bff;
    --arc-fg-bright:#ffffff; --arc-fg:#cddfff; --arc-fg-mid:#8fb4ff; --arc-fg-dim:#6d84a8; --arc-ink:#051022;
    --arc-accent:#3d7bff; --arc-accent-strong:#2b5cd6; --arc-accent-soft:#3d7bff;
    --arc-surface:#ffffff; --arc-surface-hover:#e6efff;
    --arc-ring:rgba(61,123,255,0.22); --arc-glow-ring:rgba(61,123,255,0.14);
  }
  html[data-theme="teal"]{
    --void:#021510; --void-2:#031f17; --void-header:rgba(2,21,16,0.88); --line-dim:#083d28;
    --phosphor:#8ff0d4; --phosphor-dim:#2fcf9e; --ember:#2fcf9e;
    --arc-fg-bright:#ffffff; --arc-fg:#d4f7ec; --arc-fg-mid:#8ff0d4; --arc-fg-dim:#5f9c8a; --arc-ink:#02221a;
    --arc-accent:#2fcf9e; --arc-accent-strong:#23b08a; --arc-accent-soft:#2fcf9e;
    --arc-surface:#ffffff; --arc-surface-hover:#e2faf1;
    --arc-ring:rgba(47,207,158,0.22); --arc-glow-ring:rgba(47,207,158,0.14);
  }
  html[data-theme="red"]{
    --void:#160101; --void-2:#200202; --void-header:rgba(22,1,1,0.88); --line-dim:#3d0909;
    --phosphor:#ff9a9a; --phosphor-dim:#ef4444; --ember:#ef4444;
    --arc-fg-bright:#ffffff; --arc-fg:#ffdada; --arc-fg-mid:#ff9a9a; --arc-fg-dim:#b06b6b; --arc-ink:#200303;
    --arc-accent:#ef4444; --arc-accent-strong:#dc2626; --arc-accent-soft:#ef4444;
    --arc-surface:#ffffff; --arc-surface-hover:#ffecec;
    --arc-ring:rgba(239,68,68,0.22); --arc-glow-ring:rgba(239,68,68,0.14);
  }
  html[data-theme="amber"]{
    --void:#140c01; --void-2:#1e1202; --void-header:rgba(20,12,1,0.88); --line-dim:#3a2508;
    --phosphor:#ffcf8a; --phosphor-dim:#f5a623; --ember:#f5a623;
    --arc-fg-bright:#ffffff; --arc-fg:#ffe7c4; --arc-fg-mid:#ffcf8a; --arc-fg-dim:#b08c55; --arc-ink:#221404;
    --arc-accent:#f5a623; --arc-accent-strong:#d98f12; --arc-accent-soft:#f5a623;
    --arc-surface:#ffffff; --arc-surface-hover:#fff3e0;
    --arc-ring:rgba(245,166,35,0.22); --arc-glow-ring:rgba(245,166,35,0.14);
  }
  html[data-theme="purple"]{
    --void:#060416; --void-2:#0c0820; --void-header:rgba(6,4,22,0.88); --line-dim:#1c1340;
    --phosphor:#b3a8ff; --phosphor-dim:#6a5cff; --ember:#6a5cff;
    --arc-fg-bright:#ffffff; --arc-fg:#e0dcff; --arc-fg-mid:#b3a8ff; --arc-fg-dim:#6f6a9e; --arc-ink:#0b0822;
    --arc-accent:#6a5cff; --arc-accent-strong:#4d3fd6; --arc-accent-soft:#6a5cff;
    --arc-surface:#ffffff; --arc-surface-hover:#ece9ff;
    --arc-ring:rgba(106,92,255,0.22); --arc-glow-ring:rgba(106,92,255,0.14);
  }
  html[data-theme="magenta"]{
    --void:#160216; --void-2:#200320; --void-header:rgba(22,2,22,0.88); --line-dim:#3d0a3d;
    --phosphor:#f0a8f0; --phosphor-dim:#d94fd9; --ember:#d94fd9;
    --arc-fg-bright:#ffffff; --arc-fg:#f7d9f7; --arc-fg-mid:#f0a8f0; --arc-fg-dim:#a06ba0; --arc-ink:#220422;
    --arc-accent:#d94fd9; --arc-accent-strong:#b93ab9; --arc-accent-soft:#d94fd9;
    --arc-surface:#ffffff; --arc-surface-hover:#fbe8fb;
    --arc-ring:rgba(217,79,217,0.22); --arc-glow-ring:rgba(217,79,217,0.14);
  }

  *{ box-sizing: border-box; }
  html,body{ margin:0; padding:0; height:100%; -webkit-tap-highlight-color: transparent; overscroll-behavior:none; }
  body{
    font-family: 'Georgia', 'Iowan Old Style', serif;
    background: var(--edu-bg);
    color: var(--edu-ink);
    overflow-x:hidden;
    transition: background 0.4s ease;
  }

  ::selection{ background: var(--edu-accent); color: #fff; }

  #edu-site{
    position:relative;
    min-height:100vh;
    display:flex;
    flex-direction:column;
  }

  .edu-topbar{
    background: var(--edu-blue-dark);
    color: #eef1e8;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    letter-spacing: 0.03em;
    padding: 6px 24px;
    display:flex;
    justify-content: space-between;
  }

  .edu-header{
    background: var(--edu-blue);
    color:#fff;
    padding: 22px 40px;
    display:flex;
    align-items:center;
    gap:18px;
    border-bottom: 4px solid var(--edu-accent);
  }
  .edu-crest{
    width:46px; height:46px;
    border-radius:50%;
    background: radial-gradient(circle at 35% 30%, #cfe0c9, var(--edu-accent) 70%);
    border: 2px solid #eef1e8;
    flex-shrink:0;
  }
  .edu-header h1{
    font-size: 22px;
    margin:0;
    font-weight: 600;
    letter-spacing: 0.01em;
  }
  .edu-header p{
    margin: 2px 0 0;
    font-size: 12.5px;
    font-family: Arial, Helvetica, sans-serif;
    opacity:0.85;
  }

  .edu-nav{
    background: #eceadf;
    border-bottom: 1px solid var(--edu-line);
    font-family: Arial, Helvetica, sans-serif;
    display:flex;
    gap: 0;
    padding: 0 40px;
    font-size: 13.5px;
  }
  .edu-nav a{
    color: var(--edu-blue-dark);
    text-decoration:none;
    padding: 13px 16px;
    display:inline-block;
    border-bottom: 3px solid transparent;
  }
  .edu-nav a:hover{ border-bottom-color: var(--edu-accent); background:#e2e0d3; }

  .edu-main{
    flex:1;
    display:grid;
    grid-template-columns: 1fr 300px;
    gap: 36px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px;
    width:100%;
  }

  .edu-hero{
    background:#fff;
    border:1px solid var(--edu-line);
    border-radius:3px;
    padding: 30px 34px;
    margin-bottom: 24px;
  }
  .edu-hero h2{
    margin-top:0;
    font-size: 24px;
    color: var(--edu-blue-dark);
  }
  .edu-hero p{ line-height:1.65; color:#3c3f34; font-size:15px; }

  .edu-cards{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .edu-card{
    background:#fff;
    border:1px solid var(--edu-line);
    border-radius:3px;
    padding: 18px;
  }
  .edu-card h3{
    margin:0 0 6px;
    font-size:15px;
    color: var(--edu-blue);
  }
  .edu-card p{
    font-size:12.5px;
    font-family: Arial, Helvetica, sans-serif;
    color:#5a5d52;
    line-height:1.5;
    margin:0;
  }

  .edu-sidebar{
    font-family: Arial, Helvetica, sans-serif;
  }
  .edu-box{
    background:#fff;
    border:1px solid var(--edu-line);
    border-radius:3px;
    padding:16px 18px;
    margin-bottom:16px;
  }
  .edu-box h4{
    margin:0 0 10px;
    font-size:12px;
    text-transform:uppercase;
    letter-spacing:0.06em;
    color: var(--edu-blue-dark);
    border-bottom:1px solid var(--edu-line);
    padding-bottom:8px;
  }
  .edu-box ul{ margin:0; padding-left:18px; font-size:12.5px; color:#4a4d42; line-height:1.9;}
  .edu-box a { color: var(--edu-blue); }

  .edu-footer{
    background: var(--edu-blue-dark);
    color:#c9cfc3;
    font-family: Arial, Helvetica, sans-serif;
    font-size:11.5px;
    text-align:center;
    padding: 18px;
  }

  .edu-hint{
    position:fixed;
    bottom:10px;
    right:14px;
    font-family: monospace;
    font-size:10px;
    color: rgba(31,58,95,0.18);
    letter-spacing:0.05em;
    pointer-events:none;
    user-select:none;
  }

  #flash{
    position:fixed; inset:0;
    background:#eef4f0;
    opacity:0;
    pointer-events:none;
    z-index:9998;
  }

  #archive-root{
    position:fixed;
    inset:0;
    background: var(--void);
    z-index: 9999;
    display:none;
    overflow:hidden;
  }
  #archive-root.active{ display:block; }

  .loader-wrap{
    position:absolute; inset:0;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap: 26px;
  }

  .loader-noise{
    position:absolute; inset:0;
    background: var(--void);
    pointer-events:none;
  }

  .loader-text{
    font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    font-size: clamp(38px, 8vw, 80px);
    font-weight: 800;
    letter-spacing: -0.01em;
    position:relative;
    opacity: 0;
    background: linear-gradient(120deg, #ffffff 0%, #9a9a9a 50%, #333333 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation:
      text-arrive 2.6s cubic-bezier(.2,.7,.3,1) forwards,
      text-bloom 2.6s cubic-bezier(.2,.7,.3,1) forwards;
  }

  @keyframes text-arrive{
    0%{ opacity:0; transform: scale(1.03); }
    8%{ opacity:1; }
    100%{ opacity:1; transform: scale(1); }
  }
  @keyframes text-bloom{
    0%{ filter: blur(4px) drop-shadow(0 0 0 rgba(255,255,255,0)); }
    15%{ filter: blur(1px) drop-shadow(0 0 12px rgba(255,255,255,0.8)) drop-shadow(0 0 30px rgba(255,255,255,0.4)); }
    45%{ filter: blur(0) drop-shadow(0 0 20px rgba(255,255,255,0.7)) drop-shadow(0 0 50px rgba(255,255,255,0.35)); }
    70%{ filter: blur(0) drop-shadow(0 0 34px rgba(255,255,255,0.55)) drop-shadow(0 0 72px rgba(255,255,255,0.3)); }
    100%{ filter: blur(0) drop-shadow(0 0 26px rgba(255,255,255,0.5)) drop-shadow(0 0 56px rgba(255,255,255,0.25)); }
  }

  .loader-sub{
    font-family: monospace;
    font-size: 11px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--phosphor-dim);
    opacity:0;
    animation: sub-in 0.5s ease forwards;
    animation-delay: 1.4s;
  }
  @keyframes sub-in{
    from{ opacity:0; transform: translateY(4px); }
    to{ opacity:1; transform: translateY(0); }
  }

  /* ===================== SETTINGS VIEW (embedded, inside #archive-site) ===================== */
  #browse-view{ display:block; }
  #settings-view{
    display:none;
    padding: 50px 40px 80px;
    max-width: 1100px;
    margin: 0 auto;
  }
  #archive-site.settings-open #browse-view{ display:none; }
  #archive-site.settings-open #settings-view{ display:block; }

  .settings-page-inner{
    display:flex;
    flex-direction:column;
    align-items:center;
    gap: 22px;
  }

  .settings-back-btn{
    align-self:flex-start;
    background: transparent;
    font-family: 'Courier New', monospace;
    font-size:12px; letter-spacing:0.06em; text-transform:uppercase;
    color: var(--arc-fg-mid);
    border:1px solid var(--line-dim);
    padding:8px 14px;
    cursor:pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
    animation: rise-in 0.4s ease backwards;
  }
  .settings-back-btn:hover{ border-color: var(--phosphor-dim); color:#fff; }

  .settings-panel{
    background: var(--void-2);
    border: 1px solid var(--line-dim);
    width: min(460px, 100%);
    font-family: 'Courier New', monospace;
    color: var(--phosphor);
    box-shadow: 0 30px 80px -20px rgba(0,0,0,0.8), 0 0 0 1px var(--arc-ring);
    animation: rise-in 0.4s ease 0.05s backwards;
  }
  .settings-header{
    display:flex; justify-content:space-between; align-items:center;
    padding: 18px 22px;
    border-bottom: 1px solid var(--line-dim);
    font-size:14px; letter-spacing:0.08em; text-transform:uppercase;
  }
  .settings-body{ padding: 20px 22px; }
  .settings-group{ margin-bottom: 24px; }
  .settings-group:last-child{ margin-bottom:0; }
  .settings-group h4{
    font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
    color: var(--phosphor-dim); margin:0 0 10px;
  }
  .theme-row{ display:flex; gap:10px; flex-wrap:wrap; }
  .theme-swatch{
    width:44px; height:44px; border-radius:10px; cursor:pointer;
    border: 2px solid transparent;
    transition: transform 0.12s ease, border-color 0.12s ease;
  }
  .theme-swatch:hover{ transform: scale(1.08); }
  .theme-swatch.selected{ border-color: #fff; }
  .settings-row{
    display:flex; align-items:center; justify-content:space-between; gap:14px;
    font-size:12.5px; padding: 10px 0; border-bottom: 1px solid var(--line-dim);
  }
  .settings-row:last-child{ border-bottom:none; }
  .settings-row .label{ text-align:left; }
  .settings-row .label small{ display:block; color: var(--phosphor-dim); font-size:10.5px; margin-top:2px; }
  .toggle{
    width:38px; height:20px; background: var(--line-dim); border-radius:10px;
    position:relative; cursor:pointer; flex-shrink:0;
    transition: background 0.15s ease;
  }
  .toggle.on{ background: var(--phosphor-dim); }
  .toggle::after{
    content:''; position:absolute; top:2px; left:2px;
    width:16px; height:16px; border-radius:50%; background:#fff;
    transition: left 0.15s ease;
  }
  .toggle.on::after{ left:20px; }
  select.settings-select{
    background: var(--void); border:1px solid var(--line-dim); color:var(--phosphor);
    font-family:inherit; font-size:12px; padding:6px 8px; flex-shrink:0;
  }
  input.settings-input{
    background: var(--void); border:1px solid var(--line-dim); color:var(--phosphor);
    font-family:inherit; font-size:12px; padding:6px 8px; flex-shrink:0;
    width: 100%;
    max-width: 280px;
    outline: none;
    transition: border-color 0.15s ease;
  }
  input.settings-input:focus{
    border-color: var(--phosphor-dim);
  }
  input.settings-input::placeholder{
    color: var(--phosphor-dim);
    opacity: 0.5;
  }

  #archive-site{
    display:none;
    min-height:100vh;
    background-color: var(--void);
    background-image:
      radial-gradient(circle at 15% 20%, var(--arc-glow-ring), transparent 45%),
      radial-gradient(circle at 85% 15%, var(--arc-glow-ring), transparent 40%);
    color: var(--phosphor);
    font-family: 'Courier New', monospace;
  }
  #archive-site.active{ display:block; }

  #fx{
    position:fixed; inset:0;
    z-index:1;
    pointer-events:none;
    opacity:0;
    transition: opacity 0.3s ease;
  }
  /* only show the fx canvas once the archive site is actually active,
     so it can't flash/linger over the educational disguise on load or reload */
  #archive-site.active ~ #fx{
    opacity:1;
  }
  .arc-header,
  .arc-hero,
  .arc-grid,
  .arc-footer,
  #browse-view,
  #settings-view{
    position:relative;
    z-index:2;
  }

  .arc-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding: 22px 40px;
    border-bottom: 1px solid var(--line-dim);
    position:sticky; top:0;
    background: var(--void-header);
    backdrop-filter: blur(6px);
    z-index:10;
    animation: slide-down 0.5s ease backwards;
  }
  @keyframes slide-down{
    from{ opacity:0; transform: translateY(-14px); }
    to{ opacity:1; transform: translateY(0); }
  }
  .arc-logo{
    font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.01em;
    background: linear-gradient(120deg, var(--arc-fg-bright) 0%, var(--arc-fg-mid) 55%, var(--arc-fg-dim) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 0 18px var(--arc-glow-ring));
  }
  .arc-logo span{
    background: linear-gradient(120deg, var(--arc-fg-bright) 0%, var(--arc-fg-mid) 55%, var(--arc-fg-dim) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .arc-nav{ display:flex; gap:28px; font-size:13px; font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif; }
  .arc-nav a{
    color: var(--arc-fg-mid);
    text-decoration:none;
    transition:color 0.2s;
    position:relative;
    padding: 2px 0;
  }
  .arc-nav a::after{
    content:''; position:absolute; left:0; bottom:-4px;
    width:100%; height:1px;
    background: var(--arc-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.22s ease;
  }
  .arc-nav a:hover::after,
  .arc-nav a.active::after{ transform: scaleX(1); }
  .arc-nav a:hover, .arc-nav a.active{ color: var(--arc-fg-bright); }

  .arc-hero{
    padding: 70px 40px 40px;
    max-width: 1100px;
    margin:0 auto;
    text-align:center;
    position:relative;
  }
  .arc-hero::before{
    content:'';
    position:absolute; left:50%; top:-15%;
    width: 72vw; height: 72vw;
    transform: translateX(-50%);
    background: radial-gradient(closest-side, var(--arc-glow-ring), transparent 70%);
    pointer-events:none;
    z-index:-1;
    animation: hero-breathe 7s ease-in-out infinite;
  }
  @keyframes hero-breathe{
    0%,100%{ opacity:0.45; transform: translateX(-50%) scale(1); }
    50%{ opacity:1; transform: translateX(-50%) scale(1.08); }
  }
  .arc-hero h1{
    font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    font-size: clamp(32px, 6vw, 52px);
    font-weight: 800;
    letter-spacing:-0.01em;
    margin:0 0 24px;
    color: var(--arc-fg-bright);
    text-shadow: 0 0 40px var(--arc-glow-ring);
    animation: rise-in 0.6s ease backwards;
  }
  @keyframes rise-in{
    from{ opacity:0; transform: translateY(18px); }
    to{ opacity:1; transform: translateY(0); }
  }
  @keyframes fade-in{ from{ opacity:0; } to{ opacity:1; } }

  .arc-search{
    margin: 0 auto;
    max-width: 480px;
    display:flex;
    border-radius: 6px;
    background: var(--arc-surface);
    overflow:hidden;
    box-shadow: 0 20px 50px -20px rgba(0,0,0,0.6);
    animation: rise-in 0.6s ease 0.1s backwards;
  }
  .arc-search input{
    flex:1;
    background:transparent;
    border:none;
    outline:none;
    color: var(--arc-ink);
    font-family: -apple-system, Arial, sans-serif;
    padding: 13px 16px;
    font-size:13px;
  }
  .arc-search input::placeholder{ color: var(--arc-fg-dim); }
  .arc-search button{
    background: var(--arc-accent);
    color: var(--arc-ink);
    border:none;
    padding: 0 20px;
    font-family: inherit;
    letter-spacing:0.04em;
    font-size:12px;
    cursor:pointer;
    transition: background 0.15s ease, filter 0.15s ease;
  }
  .arc-search button:hover{ filter: brightness(0.92); }

  .arc-grid{
    max-width: 1100px;
    margin: 40px auto 80px;
    padding: 0 40px;
    display:grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px 20px;
  }
  .arc-tile{
    background: transparent;
    border:none;
    cursor:pointer;
    transition: transform 0.2s ease;
    position:relative;
    padding:0;
    animation: rise-in 0.5s ease backwards;
  }
  .arc-tile:hover{ transform: translateY(-4px); }
  .arc-tile .tile-thumb{
    position:relative;
    border-radius: 6px;
    overflow:hidden;
    transition: box-shadow 0.2s ease;
  }
  .arc-tile:hover .tile-thumb{
    box-shadow: 0 0 0 1px var(--arc-ring), 0 20px 44px -18px var(--arc-ring);
  }
  .arc-tile .tile-icon{
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 6px;
    display:block;
    image-rendering: pixelated;
    transition: transform 0.3s ease;
  }
  .arc-tile:hover .tile-icon{ transform: scale(1.06); }
  .tile-play-overlay{
    position:absolute; inset:0;
    background: rgba(0,0,0,0.55);
    display:flex;
    align-items:center;
    justify-content:center;
    opacity:0;
    transition: opacity 0.15s ease;
  }
  .arc-tile:hover .tile-play-overlay,
  .arc-tile:focus .tile-play-overlay{
    opacity:1;
  }
  .tile-play-btn{
    width:48px; height:48px;
    border-radius:50%;
    background: var(--arc-surface);
    color: var(--arc-ink);
    border:none;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    transform: scale(0.85);
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  }
  .arc-tile:hover .tile-play-btn{ transform: scale(1); }
  .tile-play-btn:hover{
    background: var(--arc-accent);
    box-shadow: 0 0 24px -4px var(--arc-accent);
  }
  .tile-play-btn svg{ width:18px; height:18px; margin-left:2px; }
  .tile-caption{ padding-top: 8px; }
  .tile-caption .tile-name{
    display:block;
    font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: var(--arc-fg);
    letter-spacing: 0;
  }

  .arc-footer{
    text-align:center;
    padding: 30px;
    font-size:10.5px;
    color: var(--arc-fg-dim);
    letter-spacing:0.08em;
    border-top:1px solid var(--line-dim);
    animation: fade-in 0.8s ease 0.3s backwards;
  }

  .game-scrim{
    position:fixed; inset:0; z-index:9997;
    background: rgba(0,0,0,0.72);
    backdrop-filter: blur(3px);
    display:flex;
    align-items:center;
    justify-content:center;
    padding: 24px;
    opacity:0;
    transition: opacity 0.18s ease;
  }
  .game-scrim.open{ opacity:1; }
  .game-modal{
    width: min(880px, 94vw);
    max-height: 92vh;
    background: var(--void-2);
    border: 1px solid var(--line-dim);
    border-radius: 10px;
    overflow:hidden;
    display:flex;
    flex-direction:column;
    box-shadow:
      0 30px 80px -20px rgba(0,0,0,0.85),
      0 0 0 1px var(--arc-ring),
      0 0 50px -12px var(--arc-glow-ring);
    transform: translateY(14px) scale(0.96);
    opacity:0;
    transition: transform 0.22s cubic-bezier(.2,.85,.3,1.1), opacity 0.2s ease;
  }
  .game-scrim.open .game-modal{ transform:none; opacity:1; }
  .game-modal-bar{
    display:flex; align-items:center; justify-content:space-between; gap:12px;
    padding: 12px 14px;
    background: var(--void);
    border-bottom: 1px solid var(--line-dim);
    font-family:'Courier New', monospace;
    color: var(--phosphor);
    font-size:12.5px;
    letter-spacing:0.06em;
    text-transform:uppercase;
  }
  .game-modal-title{ overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
  .game-modal-actions{ display:flex; gap:8px; flex-shrink:0; }
  .game-btn{
    background: transparent;
    border: 1px solid var(--line-dim);
    color: var(--phosphor);
    font-family: inherit;
    font-size: 11px;
    padding: 6px 12px;
    cursor: pointer;
    letter-spacing: 0.06em;
    transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
  }
  .game-btn:hover{
    border-color: var(--phosphor-dim);
    color:#fff;
    background: rgba(255,255,255,0.04);
  }
  .game-modal-frame{
    position:relative;
    width:100%;
    aspect-ratio: 16 / 9;
    max-height: calc(92vh - 46px);
    background:#000;
  }
  .game-modal-frame iframe{
    position:absolute; inset:0;
    width:100%; height:100%;
    border:none;
  }

  /* ===================== REQUEST A GAME CTA + MODAL ===================== */
  .arc-request-cta{
    max-width: 1100px;
    margin: 0 auto 80px;
    padding: 0 40px;
  }
  .arc-request-cta-inner{
    position:relative;
    text-align:center;
    padding: 44px 32px;
    border: 1px solid var(--line-dim);
    border-radius: 12px;
    background:
      radial-gradient(circle at 50% 0%, var(--arc-glow-ring), transparent 70%),
      var(--void-2);
    box-shadow: 0 0 0 1px var(--arc-ring), 0 30px 70px -30px rgba(0,0,0,0.8);
    animation: rise-in 0.5s ease 0.2s backwards;
  }
  .arc-request-cta-inner h2{
    margin:0 0 8px;
    font-family: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    font-size: 22px;
    letter-spacing:-0.01em;
    color: var(--arc-fg-bright);
  }
  .arc-request-cta-inner p{
    margin:0 0 22px;
    font-family: 'Courier New', monospace;
    font-size:12.5px;
    color: var(--arc-fg-mid);
  }
  .arc-request-btn{
    background: transparent;
    border: 1px solid var(--phosphor-dim);
    color: var(--phosphor);
    font-family: 'Courier New', monospace;
    font-size:12px;
    letter-spacing:0.06em;
    text-transform:uppercase;
    padding: 12px 28px;
    cursor:pointer;
    transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
  }
  .arc-request-btn:hover{
    background: var(--phosphor-dim);
    color: var(--void);
    box-shadow: 0 0 24px -6px var(--phosphor-dim);
  }

  .request-scrim{
    position:fixed; inset:0;
    z-index:9998;
    background: rgba(0,0,0,0.74);
    backdrop-filter: blur(3px);
    display:flex;
    align-items:center;
    justify-content:center;
    padding: 24px;
    opacity:0;
    visibility:hidden;
    transition: opacity 0.18s ease, visibility 0s linear 0.19s;
  }
  .request-scrim.open{
    opacity:1;
    visibility:visible;
    transition: opacity 0.18s ease;
  }
  .request-modal{
    width: min(460px, 94vw);
    background: var(--void-2);
    border: 1px solid var(--line-dim);
    border-radius: 10px;
    overflow:hidden;
    display:flex;
    flex-direction:column;
    box-shadow:
      0 30px 80px -20px rgba(0,0,0,0.85),
      0 0 0 1px var(--arc-ring),
      0 0 50px -12px var(--arc-glow-ring);
    transform: translateY(14px) scale(0.96);
    opacity:0;
    transition: transform 0.22s cubic-bezier(.2,.85,.3,1.1), opacity 0.2s ease;
  }
  .request-scrim.open .request-modal{ transform:none; opacity:1; }
  .request-modal-bar{
    display:flex; align-items:center; justify-content:space-between;
    padding: 14px 18px;
    background: var(--void);
    border-bottom: 1px solid var(--line-dim);
    font-family:'Courier New', monospace;
    font-size:13px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color: var(--phosphor);
  }
  .request-close{
    background:transparent;
    border:none;
    color: var(--phosphor-dim);
    font-size:20px;
    line-height:1;
    cursor:pointer;
    padding:0 4px;
    transition: color 0.15s ease;
  }
  .request-close:hover{ color: #fff; }
  .request-form{ padding: 20px 18px; display:flex; flex-direction:column; gap:16px; }
  .request-field{ display:flex; flex-direction:column; gap:7px; }
  .request-label{
    font-family:'Courier New', monospace;
    font-size:11px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color: var(--phosphor-dim);
  }
  .request-label em{ font-style:normal; opacity:0.6; }
  .request-input,
  .request-textarea{
    background: var(--void);
    border: 1px solid var(--line-dim);
    color: var(--phosphor);
    font-family:'Courier New', monospace;
    font-size:13px;
    padding: 10px 12px;
    outline:none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
  }
  .request-input:focus,
  .request-textarea:focus{
    border-color: var(--phosphor-dim);
    box-shadow: 0 0 0 1px var(--arc-ring);
  }
  .request-input::placeholder,
  .request-textarea::placeholder{ color: var(--phosphor-dim); opacity:0.5; }
  .request-textarea{ resize:vertical; min-height:72px; }
  .request-actions{
    display:flex; align-items:center; justify-content:space-between; gap:12px;
  }
  .request-hint{
    font-family:'Courier New', monospace;
    font-size:11px;
    color: var(--phosphor-dim);
  }
  .request-submit{
    background: var(--phosphor-dim);
    color: var(--void);
    border:none;
    font-family:'Courier New', monospace;
    font-size:11.5px;
    letter-spacing:0.06em;
    text-transform:uppercase;
    padding: 11px 18px;
    cursor:pointer;
    flex-shrink:0;
    transition: filter 0.15s ease, box-shadow 0.15s ease;
  }
  .request-submit:hover{
    filter: brightness(0.9);
    box-shadow: 0 0 20px -4px var(--phosphor-dim);
  }
  .request-submit:disabled{ opacity:0.5; cursor:default; }

  @media (max-width: 720px){
    .edu-main{ grid-template-columns: 1fr; padding: 24px 18px; }
    .edu-cards{ grid-template-columns: 1fr 1fr; }
    .edu-header{ padding: 16px 18px; }
    .edu-header h1{ font-size:18px; }
    .edu-header p{ font-size:11px; }
    .edu-nav{ padding: 0 18px; overflow-x:auto; white-space:nowrap; -webkit-overflow-scrolling:touch; }
    .edu-nav a{ padding: 12px 12px; font-size:12.5px; }
    .edu-topbar{ padding:6px 18px; font-size:10.5px; flex-direction:column; gap:2px; text-align:center; }

    .arc-header{ padding: 16px 18px; flex-wrap: wrap; gap:10px; }
    .arc-nav{ gap:16px; overflow-x:auto; width:100%; -webkit-overflow-scrolling:touch; }
    .arc-hero{ padding: 40px 18px 24px; }
    .arc-search{ margin-top:22px; }
    .arc-grid{ padding: 0 18px; margin: 28px auto 50px; gap:14px; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); }
    .arc-request-cta{ padding: 0 18px; margin-bottom: 50px; }
    .arc-request-cta-inner{ padding: 32px 20px; }
    .request-scrim{ padding: 14px; }

    .loader-text{ font-size: clamp(30px, 11vw, 60px); letter-spacing: 0.03em; padding: 0 16px; text-align:center; }
    .loader-wrap{ padding: 0 16px; }

    .game-scrim{ padding: 10px; }
    .game-modal{ width: 100%; }
    .game-modal-bar{ font-size:11.5px; }
    .game-btn{ padding: 6px 9px; }

    #settings-view{ padding: 30px 18px 60px; }
    .settings-row{ flex-wrap:wrap; }
  }

  @media (max-width: 420px){
    .edu-cards{ grid-template-columns: 1fr; }
    .edu-crest{ width:36px; height:36px; }
  }

  @media (hover: none){
    .arc-tile:hover{ transform:none; }
    .edu-nav a:hover{ background:transparent; border-bottom-color:transparent; }
  }

  body.reduce-motion *{
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  }