/* Tetragram site styles: "candy arcade at night". Fonts self-hosted (SIL OFL 1.1, see fonts/OFL-*.txt). */
@font-face { font-family:"Baloo 2"; font-weight:600 800; font-display:swap; src:url(fonts/baloo2-latin-ext.woff2) format("woff2");
  unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family:"Baloo 2"; font-weight:600 800; font-display:swap; src:url(fonts/baloo2-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family:"Nunito"; font-weight:500 800; font-display:swap; src:url(fonts/nunito-latin-ext.woff2) format("woff2");
  unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family:"Nunito"; font-weight:500 800; font-display:swap; src:url(fonts/nunito-latin.woff2) format("woff2");
  unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  --night-0:#07031a; --night-1:#140a3a; --night-2:#24105c;
  --glass:rgba(255,255,255,.06); --glass-hi:rgba(255,255,255,.12); --edge:rgba(255,255,255,.14);
  --ink:#f4f0ff; --dim:#a99bd6; --gold:#ffd166;
  --I:#22d3ee; --O:#fcd34d; --T:#c084fc; --S:#4ade80; --Z:#fb7185; --J:#60a5fa; --L:#fb923c; --hit:#5cff9d;
  --cta:linear-gradient(100deg,#ff4fd8 0%,#9b5cff 50%,#22d3ee 100%);
  --display:"Baloo 2", system-ui, sans-serif; --body:"Nunito", system-ui, sans-serif;
  --nav-h:66px;
}
* { box-sizing:border-box; }
/* manipulation = scroll and pinch still work, double-tap zoom does not (phones). */
html { scroll-behavior:smooth; touch-action:manipulation; -webkit-text-size-adjust:100%; }
body { margin:0; color:var(--ink); font:16px/1.55 var(--body); min-height:100vh; overflow-x:hidden;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(255,79,216,.22), transparent 60%),
    radial-gradient(800px 600px at 95% 10%, rgba(34,211,238,.18), transparent 60%),
    radial-gradient(1000px 700px at 50% 120%, rgba(155,92,255,.30), transparent 60%),
    linear-gradient(180deg, var(--night-0), var(--night-1) 45%, var(--night-2));
  background-attachment:fixed; }
body::before { content:""; position:fixed; inset:0; pointer-events:none; opacity:.55; z-index:-1;
  background-image: radial-gradient(1.5px 1.5px at 20% 30%, #fff, transparent), radial-gradient(1px 1px at 70% 20%, #fff, transparent),
    radial-gradient(1px 1px at 40% 80%, #fff, transparent), radial-gradient(1.5px 1.5px at 85% 60%, #fff, transparent),
    radial-gradient(1px 1px at 10% 70%, #fff, transparent), radial-gradient(1px 1px at 55% 45%, #fff, transparent);
  background-size:420px 420px; animation:twinkle 6s ease-in-out infinite alternate; }
@keyframes twinkle { to { opacity:.25; } }
.sr { position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; }
.anchor { scroll-margin-top:calc(var(--nav-h) + 12px); }

/* ---------- candy tile ---------- */
.tile { --c:var(--T); position:relative; width:var(--s,44px); height:var(--s,44px); border-radius:calc(var(--s,44px) * .22);
  display:grid; place-items:center; font:800 calc(var(--s,44px) * .55)/1 var(--display); color:#1b0b33; flex:none;
  background: radial-gradient(120% 90% at 30% 15%, rgba(255,255,255,.75) 0%, rgba(255,255,255,0) 42%),
              linear-gradient(165deg, color-mix(in oklab, var(--c) 70%, #fff) 0%, var(--c) 45%, color-mix(in oklab, var(--c) 72%, #000) 100%);
  box-shadow: inset 0 -4px 0 color-mix(in oklab, var(--c) 55%, #000), inset 0 2px 0 rgba(255,255,255,.6),
              0 6px 14px -4px color-mix(in oklab, var(--c) 70%, transparent), 0 0 22px -6px var(--c);
  text-shadow:0 1px 0 rgba(255,255,255,.45); user-select:none; }
.tile i { position:absolute; right:12%; bottom:6%; font:800 calc(var(--s,44px) * .22)/1 var(--body); font-style:normal; opacity:.7; }

/* ---------- nav (also the phone section links) ---------- */
.nav { position:sticky; top:0; z-index:20; display:flex; align-items:center; gap:18px; min-height:var(--nav-h); padding:12px clamp(16px,4vw,48px);
  background:rgba(7,3,26,.6); backdrop-filter:blur(14px) saturate(140%); border-bottom:1px solid var(--edge); }
.brand { display:flex; align-items:center; gap:10px; font:800 22px var(--display); text-decoration:none; color:var(--ink); white-space:nowrap; }
.brand .tile { --s:34px; transform:rotate(-8deg); }
.links { display:flex; align-items:center; gap:4px; margin-left:auto; }
.links a:not(.btn) { color:var(--dim); text-decoration:none; font-weight:800; padding:8px 14px; border-radius:999px; white-space:nowrap; }
.links a:not(.btn):hover, .links a:not(.btn):focus-visible { color:var(--ink); background:var(--glass); }

.btn { border:0; cursor:pointer; font:800 17px var(--display); color:#fff; padding:12px 24px; border-radius:999px; background:var(--cta);
  background-size:200% 100%; box-shadow:0 10px 30px -8px rgba(255,79,216,.7), inset 0 0 0 1px rgba(255,255,255,.18);
  transition:transform .15s cubic-bezier(.3,1.6,.5,1), background-position .6s; text-decoration:none; display:inline-flex; align-items:center; gap:8px; white-space:nowrap; }
.btn:hover { transform:translateY(-2px) scale(1.03); background-position:100% 0; }
.btn:active { transform:translateY(1px) scale(.98); }
.btn:focus-visible { outline:2px solid #fff; outline-offset:3px; }
.btn.sm { font-size:15px; padding:9px 18px; }

/* ---------- layout ---------- */
.wrap { max-width:1180px; margin:0 auto; padding:0 clamp(16px,4vw,48px); }
.glass { background:linear-gradient(180deg, var(--glass-hi), var(--glass)); border:1px solid var(--edge); border-radius:24px;
  backdrop-filter:blur(16px); box-shadow:0 30px 60px -30px rgba(0,0,0,.7); }
h1, h2, h3 { font-family:var(--display); line-height:1.05; margin:0; letter-spacing:-.015em; }
.eyebrow { display:inline-block; font:800 13px var(--body); letter-spacing:.14em; text-transform:uppercase; color:var(--gold);
  background:rgba(255,209,102,.1); border:1px solid rgba(255,209,102,.3); padding:4px 12px; border-radius:999px; }
.grad { background:var(--cta); -webkit-background-clip:text; background-clip:text; color:transparent; }
em { font-style:normal; }

.hero { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(0,1fr); gap:40px; padding:56px 0 40px; align-items:start; }
.hero h1 { font-size:clamp(44px,6vw,78px); margin:16px 0 12px; font-weight:800; }
.lead { font-size:19px; color:var(--dim); max-width:36ch; margin:0 0 8px; }
.lead b { color:var(--ink); }
.lead em { display:block; font-size:15px; margin-top:6px; opacity:.8; }

/* demo board (src/demo.ts) */
.demo { --s:50px; width:calc(var(--s) * 6 + 20px); margin-top:26px; padding:10px; border-radius:20px;
  background:linear-gradient(180deg, rgba(7,3,26,.85), rgba(20,10,58,.85));
  box-shadow:inset 0 0 0 1px var(--edge), inset 0 0 40px rgba(155,92,255,.25), 0 24px 60px -30px rgba(155,92,255,.6); }
.well { position:relative; height:calc(var(--s) * 3); overflow:hidden; border-radius:10px;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:var(--s) var(--s); }
.well .piece { position:absolute; inset:0; }
.well .tile { --s:48px; position:absolute; margin:1px; }
.well .spark { position:absolute; width:8px; height:8px; margin:-4px; border-radius:50%; background:#ffe066; box-shadow:0 0 10px #ffd166; pointer-events:none; }
.cap { margin-top:10px; text-align:center; font:800 20px var(--display); color:var(--dim); min-height:1.3em; letter-spacing:.02em; transition:color .2s; }
.cap.on { color:var(--hit); text-shadow:0 0 18px rgba(92,255,157,.7); }
.cap.puf { color:#ff8be6; text-shadow:0 0 18px rgba(255,79,216,.8); }

.steps { list-style:none; padding:0; margin:28px 0 0; display:grid; gap:14px; }
.steps li { display:grid; grid-template-columns:44px 1fr; gap:14px; align-items:start; padding:16px 18px; }
.steps .tile { --s:40px; }
.steps h3 { font-size:20px; margin-bottom:2px; }
.steps p { margin:0; color:var(--dim); }
.steps p em { color:var(--ink); font-weight:800; }
.steps p.en { font-size:14px; opacity:.75; margin-top:2px; }
.keys { margin-top:8px !important; font-size:13px; }
kbd { background:rgba(0,0,0,.35); border:1px solid var(--edge); border-bottom-width:2px; border-radius:6px; padding:0 6px; font:700 12px var(--body); color:var(--ink); margin-right:2px; }

/* ---------- right column ---------- */
.side { display:grid; gap:18px; position:sticky; top:calc(var(--nav-h) + 20px); }
.card { padding:22px; }
.card h2 { font-size:26px; }
.card h2 .sub { color:var(--dim); font-size:17px; font-weight:600; }
.field { display:flex; gap:10px; margin:14px 0 4px; }
.field input { flex:1; min-width:0; font:700 18px var(--body); color:var(--ink); background:rgba(0,0,0,.35); border:1px solid var(--edge); border-radius:14px; padding:12px 16px; }
.field input::placeholder { color:var(--dim); opacity:.7; }
.field input:focus { outline:2px solid #9b5cff; outline-offset:2px; }
.err { color:#ff8a9a; font-size:13px; min-height:1.2em; margin-bottom:8px; }
.opts, .fgrid { display:grid; gap:10px; }
.opt { display:flex; justify-content:space-between; align-items:center; gap:12px; font-weight:700; color:var(--dim); }
.seg { display:flex; flex-wrap:wrap; justify-content:flex-end; padding:3px; background:rgba(0,0,0,.35); border:1px solid var(--edge); border-radius:999px; }
.seg button { border:0; background:transparent; color:var(--dim); font:800 14px var(--body); padding:6px 14px; border-radius:999px; cursor:pointer; transition:color .2s, background .2s, box-shadow .2s; }
.seg button:hover { color:var(--ink); }
.seg button:focus-visible { outline:2px solid #9b5cff; outline-offset:1px; }
.seg button.on { color:#1b0b33; background:linear-gradient(165deg,#fff,#d9cbff); box-shadow:0 4px 12px -4px rgba(155,92,255,.9); }

.filters { margin:12px 0 4px; border:1px solid var(--edge); border-radius:16px; background:rgba(0,0,0,.2); }
.filters summary { display:flex; justify-content:space-between; gap:10px; padding:10px 14px; cursor:pointer; font-weight:800; list-style:none; }
.filters summary::-webkit-details-marker { display:none; }
.filters summary::after { content:"▾"; color:var(--dim); transition:transform .2s; }
.filters[open] summary::after { transform:rotate(180deg); }
.filters .sum { margin-left:auto; color:var(--dim); font-weight:700; font-size:13px; }
.filters .fgrid { padding:4px 14px 14px; }
.filters .seg button { padding:5px 11px; font-size:13px; }

.podium { display:grid; grid-template-columns:1fr 1.15fr 1fr; gap:10px; align-items:end; margin:16px 0 12px; }
.podium .empty { grid-column:1/-1; text-align:center; color:var(--dim); padding:18px 0; }
.pod { text-align:center; padding:12px 6px 10px; border-radius:16px; background:rgba(0,0,0,.25); border:1px solid var(--edge); min-width:0; }
.pod.slot-1 { order:2; padding-top:20px; border-color:rgba(255,209,102,.5); box-shadow:0 0 30px -10px rgba(255,209,102,.6); }
.pod.slot-2 { order:1; } .pod.slot-3 { order:3; }
.pod .medal { font:800 22px var(--display); width:40px; height:40px; margin:0 auto 6px; border-radius:50%; display:grid; place-items:center; color:#2a1400; }
.slot-1 .medal { background:radial-gradient(circle at 35% 30%,#fff6c9,#ffc93c 55%,#c98a00); }
.slot-2 .medal { background:radial-gradient(circle at 35% 30%,#fff,#cfd6e6 55%,#8b93a7); }
.slot-3 .medal { background:radial-gradient(circle at 35% 30%,#ffe2c7,#f39a54 55%,#a3531b); }
.pod .who { font-weight:800; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; padding:0 4px; }
.pod .pts { font:800 20px var(--display); color:var(--gold); }
.pod .tags { font-size:11px; color:var(--dim); }
.pod.mine { border-color:rgba(255,79,216,.6); }

.lbbox { overflow-y:auto; overscroll-behavior:contain; border-top:1px solid var(--edge); scrollbar-color:rgba(255,255,255,.25) transparent; }
.lb { margin:0; padding:0; list-style:none; position:relative; }
.lb li { display:grid; grid-template-columns:36px 1fr auto auto; gap:10px; align-items:center; padding:9px 4px; border-bottom:1px solid rgba(255,255,255,.06); }
.lb .r { color:var(--dim); font-weight:800; text-align:right; } .lb .n { font-weight:700; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.lb .t { color:var(--dim); font-size:12px; white-space:nowrap; } .lb .p { color:var(--gold); font-weight:800; font-variant-numeric:tabular-nums; }
.lb li.mine .n { color:#ff8be6; }
.me { display:grid; grid-template-columns:auto 1fr auto auto; gap:10px; align-items:center; margin-top:10px; padding:10px 12px; border-radius:14px;
  background:linear-gradient(90deg, rgba(255,79,216,.18), rgba(34,211,238,.12)); border:1px solid rgba(255,79,216,.45); }
.me[hidden] { display:none; }
.me .rank { font:800 18px var(--display); color:#ff8be6; } .me .nick { font-weight:700; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.me .tags { color:var(--dim); font-size:12px; } .me .pts { font:800 18px var(--display); }
.legend { color:var(--dim); font-size:12px; margin:12px 0 0; opacity:.8; }

.foot { max-width:1180px; margin:20px auto 0; padding:26px 18px 40px; text-align:center; color:var(--dim); font-size:14px; border-top:1px solid var(--edge); }
.foot p { margin:4px 0; }
.foot a { color:var(--gold); text-decoration:none; } .foot a:hover { text-decoration:underline; }
.foot .credits { font-size:12px; opacity:.8; }

/* ---------- phone ---------- */
@media (max-width: 960px) {
  :root { --nav-h:104px; }
  .nav { flex-wrap:wrap; gap:8px 12px; padding:10px 14px; }
  .links { margin-left:0; width:100%; justify-content:space-between; }
  .links a:not(.btn) { padding:6px 10px; font-size:14px; background:var(--glass); border:1px solid var(--edge); }
  .hero { grid-template-columns:1fr; padding-top:28px; gap:28px; }
  .side { position:static; }
  .demo { --s:44px; } .well .tile { --s:42px; }
}
@media (max-width: 420px) { .demo { --s:40px; } .well .tile { --s:38px; } .hero h1 { font-size:40px; } .field { flex-direction:column; } }
@media (prefers-reduced-motion: reduce) { *, *::before { animation:none !important; transition:none !important; } }

/* ---------- feedback dialog (shared) ---------- */
dialog.fb { width:min(460px, calc(100vw - 28px)); padding:22px; color:var(--ink); background:linear-gradient(180deg, #2a1660, #170b3f); }
dialog.fb::backdrop { background:rgba(7,3,26,.7); backdrop-filter:blur(6px); }
.fb-form { display:grid; gap:12px; }
.fb-head { display:flex; align-items:center; justify-content:space-between; gap:12px; }
.fb-head h2 { font-size:24px; } .fb-head .sub { color:var(--dim); font-size:16px; font-weight:600; }
.fb-x { border:0; background:var(--glass); color:var(--dim); width:34px; height:34px; border-radius:50%; cursor:pointer; font-size:15px; }
.fb-x:hover { color:var(--ink); background:var(--glass-hi); }
.fb-kind { justify-content:flex-start; justify-self:start; }
.fb textarea, .fb input { width:100%; font:700 16px var(--body); color:var(--ink); background:rgba(0,0,0,.35); border:1px solid var(--edge); border-radius:14px; padding:12px 14px; resize:vertical; }
.fb textarea::placeholder, .fb input::placeholder { color:var(--dim); opacity:.7; }
.fb textarea:focus, .fb input:focus { outline:2px solid #9b5cff; outline-offset:2px; }
.fb-count { justify-self:end; margin-top:-8px; font-size:12px; color:var(--dim); }
.fb-hp { position:absolute !important; left:-9999px; width:1px !important; height:1px; opacity:0; }
.fb-note { margin:0; font-size:13px; color:var(--dim); } .fb-note span { display:block; opacity:.75; }
.fb-cf { min-height:65px; font-size:13px; color:#ff8a9a; }
.fb .err { margin:0; }
.fb #fbSend { justify-self:end; } .fb #fbSend:disabled { opacity:.6; cursor:wait; }
.fb-form.sent > :not(.fb-head) { display:none; }
.fb-form.sent .fb-head h2 { color:var(--hit); }
@media (max-width: 420px) { .links .fb-link { display:none; } }