/* Base styles carried over from the original "Mission: The Impossible Choice" demo (same variables, sizing, buttons, cards, layers). */
@font-face{font-family:Cairo;font-weight:400;font-style:normal;font-display:swap;src:url(cairo-400.woff) format("woff")}
@font-face{font-family:Cairo;font-weight:700;font-style:normal;font-display:swap;src:url(cairo-700.woff) format("woff")}
@font-face{font-family:Cairo;font-weight:800;font-style:normal;font-display:swap;src:url(cairo-800.woff) format("woff")}
:root{
 --ink:#050d26;--navy:#071536;--navy2:#0c2257;--royal:#1b46b0;--royal2:#2a63e0;
 --crimson:#c4202d;--crim2:#8d121c;--gold:#e5b348;--gold2:#b98a1f;--ivory:#f7f2e6;
 --mist:#b8c4e6;--ok:#2fb577;--bad:#ef6a5b;
 --glass:rgba(255,255,255,.07);--line:rgba(255,255,255,.16);
 --font:Cairo,"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{font-size:clamp(15px,min(1.2vw,2.2vh),30px)}
html,body{margin:0;height:100%;background:var(--navy);color:var(--ivory);font-family:var(--font);overflow:hidden}
body{background:
 radial-gradient(1200px 700px at 85% -10%,rgba(42,99,224,.38),transparent 60%),
 radial-gradient(900px 650px at -5% 110%,rgba(196,32,45,.30),transparent 60%),
 linear-gradient(180deg,#081840,#050d26)}
button{font-family:inherit;color:inherit;touch-action:manipulation;-webkit-user-select:none;user-select:none}
:focus-visible{outline:.22rem solid var(--gold);outline-offset:.2rem;border-radius:.6rem}
h1,h2,h3,p{margin:0}
#app{height:100dvh;display:flex;flex-direction:column}

/* ---------- header ---------- */
.top{display:flex;align-items:center;gap:1rem;padding:.7rem 1.6rem;border-bottom:1px solid var(--line);background:rgba(5,13,38,.62);backdrop-filter:blur(10px);flex:none}
.brand{display:flex;align-items:center;gap:.7rem;min-width:0}
.brand img{height:2.7rem;width:auto;display:block}
.brand b{font-size:.78rem;letter-spacing:.09em;line-height:1.2;font-weight:800;color:var(--mist);text-transform:uppercase}
.brand b em{display:block;font-style:normal;color:var(--gold)}
.hstage{flex:1;display:flex;flex-direction:column;align-items:center;gap:.25rem;min-width:0}
.hstage .lab{font-weight:800;letter-spacing:.14em;font-size:.82rem;color:var(--gold);text-transform:uppercase;text-align:center}
.dots{display:flex;gap:.45rem}
.dots i{width:.72rem;height:.72rem;border-radius:50%;background:rgba(255,255,255,.2);border:2px solid rgba(255,255,255,.3)}
.dots i.done{background:var(--gold);border-color:var(--gold)}
.dots i.now{background:#fff;border-color:#fff;box-shadow:0 0 0 .22rem rgba(229,179,72,.45)}
.tools{display:flex;gap:.5rem;flex:none}
.tool{min-width:2.9rem;height:2.9rem;padding:0 .8rem;border-radius:.8rem;border:1px solid var(--line);background:var(--glass);font-weight:800;font-size:.9rem;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:.4rem}
.tool:hover{background:rgba(255,255,255,.14)}
.tool.off{opacity:.55}

/* ---------- stage ---------- */
.stage{flex:1;display:flex;flex-direction:column;padding:1.2rem 2.4rem 1.1rem;overflow:auto;min-height:0}
.stage.anim>*{animation:rise .5s cubic-bezier(.2,.8,.3,1) both}
.stage.anim>*:nth-child(2){animation-delay:.06s}.stage.anim>*:nth-child(3){animation-delay:.12s}.stage.anim>*:nth-child(4){animation-delay:.18s}
@keyframes rise{from{opacity:0;transform:translateY(1.2rem)}to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(.88);opacity:0}70%{transform:scale(1.04)}100%{transform:scale(1);opacity:1}}
.col{display:flex;flex-direction:column}
.center{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:1.1rem;margin:auto 0;width:100%}
.grow{flex:1}
.eyebrow{font-weight:800;letter-spacing:.2em;font-size:.95rem;color:var(--gold);text-transform:uppercase}
.h1{font-size:3.1rem;font-weight:800;line-height:1.12;letter-spacing:-.01em}
.h2{font-size:2.3rem;font-weight:800;line-height:1.18}
.lead{font-size:1.45rem;line-height:1.5;color:#dfe6fa;max-width:46rem}
.gold{color:var(--gold)}
.card{background:var(--glass);border:1px solid var(--line);border-radius:1.4rem;padding:1.4rem 1.8rem;backdrop-filter:blur(6px)}
.pill{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .95rem;border-radius:2rem;background:rgba(229,179,72,.14);border:1px solid rgba(229,179,72,.45);color:var(--gold);font-weight:800;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.7rem;min-height:3.5rem;padding:.75rem 1.9rem;border-radius:1rem;border:1px solid var(--line);background:var(--glass);font-weight:800;font-size:1.15rem;letter-spacing:.03em;cursor:pointer;transition:transform .15s,background .2s,box-shadow .2s}
.btn:hover:not(:disabled){background:rgba(255,255,255,.15);transform:translateY(-2px)}
.btn:active:not(:disabled){transform:scale(.97)}
.btn:disabled{opacity:.38;cursor:not-allowed}
.btn.primary{background:linear-gradient(180deg,#f2c65d,#d29a2a);color:#1b1304;border-color:#f6d57f;box-shadow:0 .5rem 1.6rem rgba(229,179,72,.32)}
.btn.primary:hover:not(:disabled){background:linear-gradient(180deg,#ffd672,#dca431)}
.btn.red{background:linear-gradient(180deg,#d92d3b,#9c1522);border-color:#ec6a74}
.btn.xl{font-size:1.7rem;min-height:4.8rem;padding:1rem 3rem;border-radius:1.3rem}
.btn.sm{min-height:2.9rem;padding:.5rem 1.1rem;font-size:.95rem;border-radius:.8rem}
.btn.ghost{background:transparent}
.nav{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding-top:1.1rem;margin-top:auto;flex-wrap:wrap}
.nav .sp{flex:1}
.spk{width:3.1rem;height:3.1rem;flex:none;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.09);font-size:1.3rem;cursor:pointer;display:inline-grid;place-items:center}
.spk:hover{background:rgba(229,179,72,.25)}

/* ---------- welcome ---------- */
.s-welcome{padding:0;position:relative;overflow:hidden}
.w-bg{position:absolute;inset:0;background-size:cover;background-position:center 30%;opacity:.5;filter:saturate(.9)}
.w-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,13,38,.97) 0%,rgba(7,21,54,.88) 42%,rgba(7,21,54,.55) 100%)}
.w-in{position:relative;flex:1;display:grid;grid-template-columns:1.25fr .8fr;gap:3rem;align-items:center;padding:1.4rem 4.2rem}
.w-copy{display:flex;flex-direction:column;gap:1.1rem;align-items:flex-start}
.w-logo{height:7.5rem;filter:drop-shadow(0 .5rem 1.2rem rgba(0,0,0,.5))}
.w-title{font-size:4.6rem;font-weight:800;line-height:1;letter-spacing:-.02em}
.w-title span{display:block;font-size:1.6rem;letter-spacing:.34em;color:var(--gold);margin-bottom:.7rem}
.w-title em{font-style:normal;background:linear-gradient(180deg,#fff 30%,#f0c867);-webkit-background-clip:text;background-clip:text;color:transparent}
.w-flow{display:flex;flex-wrap:wrap;gap:.45rem;align-items:center;font-weight:800;font-size:.82rem;letter-spacing:.1em;color:var(--mist)}
.w-flow i{font-style:normal;color:var(--gold)}
.w-side{display:flex;flex-direction:column;align-items:center;gap:1.1rem}
.portrait{position:relative;width:min(21rem,30vh + 8rem);aspect-ratio:1;border-radius:50%;padding:.5rem;background:conic-gradient(from 210deg,var(--gold),#fff6d6,var(--gold2),var(--gold));box-shadow:0 1.6rem 4rem rgba(0,0,0,.55),0 0 0 .6rem rgba(255,255,255,.06)}
.portrait img{width:100%;height:100%;border-radius:50%;object-fit:cover;display:block;border:.4rem solid var(--navy)}
.tname{text-align:center}
.tname small{display:block;letter-spacing:.24em;font-weight:800;color:var(--gold);font-size:.8rem;text-transform:uppercase}
.tname strong{font-size:2rem;font-weight:800}
.tname span{display:block;color:var(--mist);font-size:1rem}

/* ---------- setup ---------- */
.stepper{display:flex;align-items:center;gap:1.4rem}
.stepper button{width:4.6rem;height:4.6rem;font-size:2.4rem;font-weight:800;border-radius:1.2rem;border:1px solid var(--line);background:var(--glass);cursor:pointer}
.stepper input{width:11rem;height:6.4rem;font:800 4.4rem var(--font);text-align:center;border-radius:1.4rem;border:2px solid var(--gold);background:rgba(0,0,0,.28);color:#fff;-moz-appearance:textfield}
.stepper input::-webkit-outer-spin-button,.stepper input::-webkit-inner-spin-button{-webkit-appearance:none}
.err{color:#ffb4ab;font-weight:800;min-height:1.6rem;font-size:1.1rem}
.chips{display:flex;flex-wrap:wrap;gap:.45rem;justify-content:center;max-width:56rem}
.chips i{font-style:normal;min-width:2.5rem;padding:.25rem .55rem;border-radius:.6rem;background:rgba(255,255,255,.09);border:1px solid var(--line);font-weight:800;font-size:.9rem;text-align:center}

/* ---------- roulette ---------- */
.rl-card{position:relative;padding:1.2rem 3.6rem;border-radius:2rem;background:radial-gradient(circle at 50% 0%,rgba(42,99,224,.45),rgba(5,13,38,.8));border:2px solid var(--gold);box-shadow:0 0 0 .5rem rgba(229,179,72,.14),0 2rem 5rem rgba(0,0,0,.5)}
.rl-card .hash{position:absolute;top:1rem;left:1.4rem;font-size:1.4rem;font-weight:800;color:var(--gold);letter-spacing:.2em}
.rl{font-size:11rem;font-weight:800;line-height:1.05;background:linear-gradient(180deg,#fff 30%,#f0c867);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums;min-width:2.4ch;text-align:center}
.rl.spin{animation:flick .12s infinite}
@keyframes flick{50%{opacity:.7;transform:scale(.97)}}
.rl-card.done{animation:pop .5s both;border-color:#fff;box-shadow:0 0 0 .6rem rgba(229,179,72,.4),0 2rem 5rem rgba(0,0,0,.5),0 0 5rem rgba(229,179,72,.35)}
.say-line{font-size:1.9rem;font-weight:700}
.say-line b{color:var(--gold)}

/* ---------- choices ---------- */
.badge-s{display:inline-flex;align-items:center;gap:.6rem;padding:.35rem 1rem;border-radius:2rem;background:rgba(255,255,255,.1);font-weight:800;font-size:1rem;letter-spacing:.08em}
.badge-s b{color:var(--gold)}
.scene{display:flex;align-items:center;gap:1.2rem;max-width:62rem}
.scene p{font-size:1.65rem;line-height:1.45;font-weight:600}
.qline{font-size:2.5rem;font-weight:800;line-height:1.15}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem;width:100%;max-width:70rem}
.opt{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;min-height:15rem;padding:1.4rem;border-radius:1.8rem;border:3px solid rgba(255,255,255,.2);cursor:pointer;text-align:center;font-weight:800;transition:transform .2s,box-shadow .2s,opacity .25s,border-color .2s}
.opt .ic{font-size:5.4rem;line-height:1}
.opt .lb{font-size:2.1rem;letter-spacing:.04em}
.opt .ab{position:absolute;top:.9rem;left:1.1rem;width:2.5rem;height:2.5rem;border-radius:.7rem;background:rgba(0,0,0,.3);display:grid;place-items:center;font-size:1.2rem}
.opt.a,.opt.blue{background:linear-gradient(160deg,#2a63e0,#102b72)}
.opt.b,.opt.red{background:linear-gradient(160deg,#d92d3b,#6f0e17)}
.opt:hover{transform:translateY(-.35rem) scale(1.015)}
.opt.sel{border-color:#fff;box-shadow:0 0 0 .5rem rgba(229,179,72,.7),0 1.4rem 3.2rem rgba(0,0,0,.5);transform:scale(1.03)}
.opt.sel::after{content:"✓ SELECTED";position:absolute;bottom:.8rem;font-size:.9rem;letter-spacing:.14em;background:var(--gold);color:#1b1304;padding:.2rem .8rem;border-radius:2rem}
.opt.dim{opacity:.4;transform:scale(.97)}
.reasons{display:flex;flex-direction:column;gap:1rem;width:100%;max-width:62rem}
.rsn{display:flex;align-items:center;gap:1.2rem;padding:1.15rem 1.6rem;min-height:5rem;border-radius:1.3rem;border:2px solid var(--line);background:var(--glass);cursor:pointer;text-align:left;font-size:1.5rem;font-weight:700;line-height:1.3;transition:all .2s}
.rsn:hover{background:rgba(255,255,255,.14);transform:translateX(.25rem)}
.rsn .ab{flex:none;width:2.9rem;height:2.9rem;border-radius:.8rem;background:rgba(229,179,72,.2);color:var(--gold);display:grid;place-items:center;font-weight:800}
.rsn.sel{border-color:var(--gold);background:rgba(229,179,72,.18);box-shadow:0 0 0 .3rem rgba(229,179,72,.35)}
.rsn.sel .ab{background:var(--gold);color:#1b1304}
.picked{display:inline-flex;align-items:center;gap:.8rem;padding:.5rem 1.3rem;border-radius:1rem;background:rgba(255,255,255,.1);font-weight:800;font-size:1.3rem}
.namebox input{font:800 2.2rem var(--font);width:min(30rem,86vw);text-align:center;padding:.9rem 1.2rem;border-radius:1.1rem;border:2px solid var(--gold);background:rgba(0,0,0,.3);color:#fff}
.namebox input::placeholder{color:rgba(255,255,255,.4);font-weight:400}
.lock{font-size:4rem;animation:pop .6s both}
.lockmsg{max-width:52rem;font-size:1.7rem;line-height:1.45;padding:1.2rem 1.8rem;border-radius:1.3rem;background:var(--glass);border:1px solid var(--line)}
.lockmsg b{color:var(--gold)}

/* ---------- generation ---------- */
.gen{position:relative}
.gen .beat{animation:pop .7s both}
.gen .sparkle{font-size:5rem;animation:spin 3s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.gen .bar{width:min(32rem,70vw);height:.5rem;border-radius:1rem;background:rgba(255,255,255,.15);overflow:hidden}
.gen .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold),#fff);animation:fill 5.2s linear forwards}
@keyframes fill{to{width:100%}}

/* ---------- story ---------- */
.book{position:relative;width:100%;max-width:70rem;padding:2.2rem 3rem;border-radius:1.8rem;background:linear-gradient(180deg,rgba(247,242,230,.97),rgba(238,229,208,.97));color:#1d1a12;box-shadow:0 2rem 5rem rgba(0,0,0,.5);border-left:.7rem solid var(--crimson)}
.book .ptitle{font-weight:800;letter-spacing:.18em;font-size:.95rem;color:var(--crim2);text-transform:uppercase;margin-bottom:.8rem;display:flex;align-items:center;gap:.7rem}
.book p.txt{font-size:1.85rem;line-height:1.62;font-weight:600}
.book mark{background:linear-gradient(180deg,transparent 58%,rgba(229,179,72,.7) 58%);color:inherit;padding:0 .1em;border-radius:.15em}
.book .spk{position:absolute;top:1.2rem;right:1.4rem;background:rgba(7,21,54,.08);border-color:rgba(7,21,54,.2);color:#071536}
.readers{display:flex;gap:.8rem;align-items:center;flex-wrap:wrap}
.title-card h1{font-size:4.2rem}
.credits{color:var(--mist);font-size:1.25rem;max-width:52rem;line-height:1.6}
.credits b{color:var(--gold)}

/* ---------- quiz ---------- */
.qbig{font-size:2.6rem;font-weight:800;line-height:1.2;max-width:62rem;text-align:center}
.qopts{display:flex;flex-direction:column;gap:.7rem;width:100%;max-width:60rem}
.qo{position:relative;display:flex;align-items:center;gap:1.3rem;min-height:4.4rem;padding:.65rem 1.4rem;border-radius:1.3rem;border:2px solid var(--line);background:var(--glass);font-size:1.65rem;font-weight:700;text-align:left}
.qo .ab{flex:none;width:3.2rem;height:3.2rem;border-radius:.9rem;background:rgba(229,179,72,.2);color:var(--gold);display:grid;place-items:center;font-weight:800;font-size:1.4rem}
.qo .tag{margin-left:auto;font-size:.9rem;letter-spacing:.12em;font-weight:800;padding:.25rem .8rem;border-radius:2rem;white-space:nowrap}
.qo.ok{border-color:var(--ok);background:rgba(47,181,119,.2);box-shadow:0 0 0 .35rem rgba(47,181,119,.3);animation:pop .5s both}
.qo.ok .ab{background:var(--ok);color:#04251a}
.qo.ok .tag{background:var(--ok);color:#04251a}
.qo.no{opacity:.4}
.explain{max-width:58rem;font-size:1.4rem;line-height:1.45;padding:.7rem 1.4rem;border-radius:1.2rem;background:rgba(47,181,119,.14);border:1px solid rgba(47,181,119,.5);animation:rise .5s both}
.explain b{color:#7de3b0}
.cd{position:fixed;inset:0;z-index:700;display:grid;place-items:center;background:rgba(5,13,38,.78);font-size:14rem;font-weight:800;color:var(--gold)}
.cd span{animation:pop .5s both}

/* ---------- grammar ---------- */
.ex{display:flex;flex-direction:column;gap:1rem;width:100%;max-width:64rem}
.ex p{font-size:1.9rem;line-height:1.45;font-weight:700;padding:1rem 1.6rem;border-radius:1.2rem;background:var(--glass);border:1px solid var(--line)}
.ex mark.wr{background:linear-gradient(180deg,var(--gold),#cf9a27);color:#1b1304;padding:.05em .35em;border-radius:.35em}
.ex mark.vb{background:rgba(42,99,224,.75);color:#fff;padding:.05em .35em;border-radius:.35em}
.formula{display:flex;align-items:center;gap:.8rem;flex-wrap:wrap;justify-content:center;font-size:2.4rem;font-weight:800;animation:pop .6s both}
.formula span{padding:.5rem 1.2rem;border-radius:1rem}
.formula .f1{background:linear-gradient(180deg,var(--gold),#cf9a27);color:#1b1304}
.formula .f2{background:rgba(42,99,224,.85)}
.formula i{font-style:normal;color:var(--gold)}
.rw{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;width:100%;max-width:56rem}
.rw div{padding:1rem 1.4rem;border-radius:1.2rem;font-size:1.65rem;font-weight:800;text-align:left}
.rw .bad{background:rgba(239,106,91,.15);border:2px solid var(--bad)}
.rw .good{background:rgba(47,181,119,.15);border:2px solid var(--ok)}
.rw .bad s{text-decoration-thickness:.15rem;opacity:.85}

/* ---------- speaking ---------- */
.sq{font-size:3.1rem;font-weight:800;line-height:1.2;max-width:62rem;text-align:center}
.sq small{display:block;font-size:1.1rem;letter-spacing:.2em;color:var(--gold);margin-bottom:.6rem}
.turn{font-size:2.2rem;font-weight:800}
.role{font-weight:800;letter-spacing:.24em;color:var(--gold);font-size:1.1rem;text-transform:uppercase}
.support{width:100%;max-width:60rem;padding:1rem 1.5rem;border-radius:1.2rem;background:rgba(255,255,255,.06);border:1px dashed rgba(229,179,72,.6);text-align:left}
.support h4{margin:0 0 .4rem;font-size:.85rem;letter-spacing:.2em;color:var(--gold)}
.support p{font-size:1.4rem;line-height:1.55;font-weight:700}
.support p.more{font-size:1.2rem;color:#dbe3fb;font-weight:600}
.support u{text-decoration:none;border-bottom:.15rem solid var(--gold);padding:0 .6em}
.link{background:none;border:0;color:var(--gold);font-weight:800;font-size:1rem;cursor:pointer;text-decoration:underline;padding:.4rem 0}
.part{display:flex;align-items:center;gap:1rem;padding:.7rem 1rem;border-radius:1rem;background:rgba(0,0,0,.22);margin-top:.8rem;width:100%}
.part-t{font-weight:800;letter-spacing:.18em;font-size:.72rem;color:var(--mist);flex:none}
.part-g{display:flex;flex-wrap:wrap;gap:.3rem}
.part-g i{font-style:normal;position:relative;min-width:1.9rem;padding:.12rem .35rem;border-radius:.45rem;font-size:.78rem;font-weight:700;text-align:center;background:rgba(255,255,255,.06);color:rgba(255,255,255,.55)}
.part-g i.on{background:rgba(47,181,119,.28);color:#fff;border:1px solid rgba(47,181,119,.7)}
.part-g i b{margin-left:.15rem;color:#7de3b0}
.part-g i.lead{background:var(--gold);color:#1b1304;border-color:var(--gold)}
.part-g i.lead b{color:#1b1304}
.opinion{display:inline-block;padding:.3rem 1rem;border-radius:2rem;background:var(--crimson);font-weight:800;letter-spacing:.14em;font-size:.95rem}

/* ---------- closing ---------- */
.learn{display:flex;flex-direction:column;gap:1rem;width:100%;max-width:50rem}
.learn div{display:flex;align-items:center;gap:1.1rem;padding:1.15rem 1.6rem;border-radius:1.3rem;background:var(--glass);border:1px solid var(--line);font-size:1.9rem;font-weight:800;animation:rise .6s both}
.learn div:nth-child(2){animation-delay:.5s}.learn div:nth-child(3){animation-delay:1s}
.learn i{font-style:normal;width:3rem;height:3rem;border-radius:50%;background:var(--ok);color:#04251a;display:grid;place-items:center;flex:none}
.choice2{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem;width:100%;max-width:56rem}
.use{font-size:7.4rem;font-weight:800;line-height:1;background:linear-gradient(180deg,#fff 20%,#f0c867);-webkit-background-clip:text;background-clip:text;color:transparent;animation:pop .8s both;letter-spacing:-.01em}
.quote{font-size:1.6rem;font-style:italic;max-width:46rem;color:var(--mist);line-height:1.5}
.final{font-weight:800;letter-spacing:.18em;font-size:1.25rem;color:var(--gold)}

/* ---------- teacher button, layers ---------- */
.tbtn{color:var(--gold)}
.gram .h1{font-size:2.5rem}.gram .ex{max-width:78rem;gap:.55rem}.gram .ex p{font-size:1.5rem;padding:.55rem 1.2rem;line-height:1.4}.gram .formula{font-size:2rem}.gram .formula span{padding:.3rem 1rem}.gram .rw div{font-size:1.35rem;padding:.6rem 1.2rem}.gram{gap:.8rem}
.layer{position:fixed;inset:0;z-index:800;display:none;place-items:center;background:rgba(3,8,24,.72);backdrop-filter:blur(6px)}
.layer.on{display:grid}
.layer.l2{z-index:900}
.layer.l3{z-index:1000}
.sheet{width:min(34rem,94vw);max-height:92dvh;overflow:auto;padding:1.5rem;border-radius:1.6rem;background:linear-gradient(180deg,#0f2a66,#081840);border:1px solid var(--line);box-shadow:0 2rem 6rem rgba(0,0,0,.6);animation:pop .3s both}
.sheet h3{font-size:1.5rem;font-weight:800;margin-bottom:.2rem}
.sheet .sub{color:var(--mist);font-size:.95rem;margin-bottom:1rem}
.sheet .btn{width:100%;justify-content:flex-start;margin-bottom:.55rem}
.sheet .row{display:flex;flex-wrap:wrap;gap:.45rem;margin:.2rem 0 .9rem}
.sheet .row .btn{width:auto;margin:0}
.sheet.wide{width:min(54rem,94vw)}
.numgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(4.2rem,1fr));gap:.6rem;margin:1rem 0}
.numgrid i{font-style:normal;position:relative;display:grid;place-items:center;height:3.8rem;border-radius:.9rem;background:rgba(255,255,255,.08);border:1px solid var(--line);font-size:1.5rem;font-weight:800}
.numgrid i.c{background:rgba(229,179,72,.22);border-color:var(--gold)}
.numgrid i.p{background:rgba(47,181,119,.25);border-color:var(--ok)}
.numgrid i small{position:absolute;top:.1rem;right:.3rem;font-size:.8rem}
.cbox{text-align:center}
.cbox p{font-size:1.4rem;margin:.6rem 0 1.2rem;line-height:1.4}
.cbox .row{justify-content:center}
.util{text-align:center;width:min(40rem,94vw)}
.util .rl{font-size:9rem}
.compact .rl{font-size:7rem}.compact .rl-card{padding:.7rem 2.8rem}.compact .rl-card .hash{font-size:1.1rem;top:.7rem}.compact .say-line{font-size:1.6rem}
.toast{position:fixed;left:50%;bottom:4.2rem;transform:translateX(-50%);z-index:950;padding:.7rem 1.5rem;border-radius:1rem;background:#fff;color:#071536;font-weight:800;box-shadow:0 1rem 3rem rgba(0,0,0,.5);animation:rise .3s both}

/* ---------- responsive ---------- */
@media (max-width:1000px){
 .stage{padding:1rem 1.2rem}
 .w-in{grid-template-columns:1fr;padding:1.4rem;gap:1.4rem;text-align:center}
 .w-copy{align-items:center}.w-title{font-size:3rem}.w-flow{justify-content:center}
 .portrait{width:12rem}
 .h1{font-size:2.4rem}.qline{font-size:1.9rem}.sq{font-size:2.2rem}
}
@media (max-width:760px){
 html{font-size:15px}
 .brand b{display:none}
 .top{padding:.5rem .8rem;gap:.5rem}
 .opts,.rw,.choice2{grid-template-columns:1fr}
 .opt{min-height:9rem}.opt .ic{font-size:3.4rem}.opt .lb{font-size:1.5rem}
 .rl{font-size:7rem}.rl-card{padding:1rem 2rem}
 .book{padding:1.3rem 1.4rem}.book p.txt{font-size:1.3rem}
 .qbig{font-size:1.7rem}.qo{font-size:1.2rem}.rsn{font-size:1.2rem}
 .formula{font-size:1.6rem}.use{font-size:3.6rem}.h2{font-size:1.7rem}.w-title{font-size:2.3rem}
 .stepper input{width:7rem;height:4.4rem;font-size:2.6rem}.stepper button{width:3.4rem;height:3.4rem}
 .learn div{font-size:1.2rem}
}
@media (max-width:560px){.hstage .lab{display:none}.tool{min-width:2.4rem;height:2.4rem;padding:0 .5rem;font-size:.75rem}}
@media (prefers-reduced-motion:reduce){
 *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}