:root{color-scheme:dark;--bg:#07060a;--ink:#efe7da;--muted:#b7aaaf;--line:#44333c;--accent:#e8344a;--pink:#ff98a6;--display:'Cormorant Garamond',Georgia,serif;--body:'Karla',system-ui,sans-serif}
*{box-sizing:border-box} [hidden]{display:none!important} ::selection{background:#a9273b;color:#fff} html{scrollbar-color:#72505e var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 var(--body);-webkit-font-smoothing:antialiased} main{width:min(100%,460px);margin:auto;padding:32px max(20px,env(safe-area-inset-left)) 32px;min-width:0}
h1,h2,p,figure{margin:0} h1{font:500 clamp(38px,9vw,46px)/1.04 var(--display);letter-spacing:-.02em;text-wrap:balance} h1 em{color:var(--pink)} h2{font:italic 500 30px/1.15 var(--display)} .lede{color:var(--muted);margin-top:14px;max-width:38ch}
.preview{margin:24px 0;background:#000;border:1px solid var(--line);border-radius:16px;overflow:hidden;position:relative} canvas{display:block;width:100%;aspect-ratio:1.15} figcaption{position:absolute;bottom:16px;left:16px;right:16px;text-align:center;color:var(--muted);font-size:14px;overflow-wrap:anywhere}
form,.field,.result{display:flex;flex-direction:column} form{gap:16px}.field{gap:7px} label{font-size:14px;font-weight:700} label span{font-weight:400;color:var(--muted)} input,textarea,button,.button{font:inherit;color:var(--ink);border:1px solid var(--line);border-radius:12px;background:#171116}
input,textarea{width:100%;padding:12px 14px;font-size:17px;caret-color:var(--pink)} textarea{resize:vertical;min-height:86px} input::placeholder,textarea::placeholder{color:#ad99a3} input:focus,textarea:focus{border-color:var(--pink);outline:1px solid var(--pink)} .count{align-self:flex-end;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
button,.button{min-height:48px;padding:13px 15px;display:inline-flex;align-items:center;justify-content:center;text-align:center;font-weight:700;text-decoration:none;cursor:pointer;transition:background .18s} button:hover,.button:hover{background:#30212a} .primary{background:var(--accent);border-color:var(--accent);color:#fff} .primary:hover{background:#ca253d} :focus-visible{outline:2px solid var(--pink);outline-offset:4px} a{color:var(--muted);text-underline-offset:4px} a:hover{color:var(--ink)}
.error{color:var(--pink);font-size:14px}.result{margin-top:28px;border-top:1px solid var(--line);padding-top:24px;gap:14px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.actions>*{min-width:0}.result #link{font-size:13px} #qrbox{text-align:center} #qr{background:#fff;border-radius:12px;margin:0 auto 12px;max-width:340px;aspect-ratio:1}
footer{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 20px;text-align:center;margin-top:32px;color:var(--muted);font-size:13px} footer p{flex-basis:100%}.fine{color:var(--muted);font-size:13px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);border-radius:12px;padding:12px 18px;max-width:calc(100% - 32px);opacity:0;pointer-events:none}.toast.on{opacity:1}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.gift-page{background:#000}.gift{min-height:100svh;display:flex;flex-direction:column;align-items:center;text-align:center;padding-top:max(48px,env(safe-area-inset-top));padding-bottom:max(28px,env(safe-area-inset-bottom));width:min(100%,660px)}.gift header{max-width:100%}.gift h1{font-size:clamp(38px,9vw,62px);color:var(--pink);overflow-wrap:anywhere;margin-top:10px}.sender{color:var(--muted);font-size:14px}.gift-art{width:100%;position:relative;margin:18px 0 0}.gift-art canvas{aspect-ratio:1.15}.message{width:100%;max-width:440px;margin:8px 0 22px;overflow-wrap:anywhere}.message #note{font:italic 500 clamp(24px,6vw,32px)/1.25 var(--display);white-space:pre-wrap}.message .sender{margin-top:14px}.gift-actions{margin-top:auto;display:flex;flex-direction:column;align-items:center;gap:12px;padding-top:18px;font-size:14px}.text-button{border:0;background:none;color:var(--muted);font-size:14px;font-weight:400;text-decoration:underline;text-underline-offset:4px;min-height:44px;padding:6px 14px}
@media(min-width:700px){.creator{padding-top:46px}.gift-art{max-width:510px}.gift{padding-top:54px}} @media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.entry-gate{position:fixed;inset:0;z-index:2;width:100%;height:100%;display:grid;place-content:center;justify-items:center;gap:14px;padding:0 max(16px,env(safe-area-inset-right,0px)) 0 max(16px,env(safe-area-inset-left,0px));border:0;border-radius:0;background:transparent;color:#e9e2d4;cursor:pointer;transition:opacity .7s ease;-webkit-tap-highlight-color:transparent}
.entry-gate:hover{background:transparent}.entry-gate.leaving{opacity:0;pointer-events:none}.entry-gate:focus-visible{outline:none}.entry-gate:focus-visible .g2{outline:1px solid rgba(255,255,255,.18);outline-offset:6px}
.entry-gate .g1{font:italic 500 clamp(34px,9vw,52px)/1 var(--display);letter-spacing:.01em;max-width:100%;overflow-wrap:anywhere}.entry-gate .g2{font:500 11px/1 ui-monospace,Menlo,Consolas,monospace;letter-spacing:.32em;text-transform:uppercase;opacity:.6;animation:breathe 2.4s ease-in-out infinite}@keyframes breathe{50%{opacity:.25}}@media(prefers-reduced-motion:reduce){.entry-gate .g2{animation:none}}
/* ---- Send an Equation ---- */
.preview canvas,.gift-art canvas{aspect-ratio:600/640}
.preview .cap{position:absolute;top:14px;left:12px;right:12px;bottom:auto;text-align:center;font:italic 500 20px/1.2 var(--display);color:var(--ink);min-height:1.2em;transition:opacity .35s}
.preview .tag{position:absolute;right:12px;bottom:10px;font:500 10px/1 ui-monospace,Menlo,Consolas,monospace;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);opacity:.7}
.step{border:1px solid var(--line);border-radius:16px;padding:16px 16px 18px;margin:0;display:flex;flex-direction:column;gap:14px;min-width:0}
.step legend{padding:0 8px;margin-left:-8px;font:italic 500 24px/1.1 var(--display)}
.step legend b{color:var(--pink);font-weight:500;margin-right:6px}
.hint{color:var(--muted);font-size:14px;margin-top:-6px}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.pair .field{min-width:0}
input[type=date]{color-scheme:dark;min-height:50px;-webkit-appearance:none;appearance:none}
input[type=date]::-webkit-date-and-time-value{text-align:left}
#pad{width:100%;aspect-ratio:1;border-radius:12px;border:1px solid var(--line);touch-action:none;cursor:crosshair;background:#000;-webkit-user-select:none;user-select:none}
.padbar{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.padbar button{min-height:40px;padding:8px 16px}
.padstatus{font-size:14px;color:var(--ink);min-height:1.5em;flex:1 1 60%}
.padstatus.warn{color:var(--pink)}
.eq{font:12px/1.5 ui-monospace,Menlo,Consolas,monospace;color:var(--muted);overflow-wrap:anywhere;margin-top:-4px}
.linkish{background:none;border:0;min-height:40px;padding:4px 0;color:var(--muted);font-weight:400;font-size:14px;text-decoration:underline;text-underline-offset:4px;align-self:flex-start}
.linkish:hover{background:none;color:var(--ink)}
.gift .caption{font:italic 500 clamp(24px,6.4vw,32px)/1.2 var(--display);min-height:2.5em;max-width:440px;margin:4px auto 0;transition:opacity .35s;overflow-wrap:anywhere}
.caption.out,.cap.out{opacity:0}
.gift .sender{margin-top:6px}
.gift .eq{text-align:center;margin:16px auto 0;max-width:420px;opacity:.8}
@media (max-width:380px){.pair{grid-template-columns:1fr}}
.step legend span{font:400 14px/1 var(--body);color:var(--muted);margin-left:4px}