/* ======== buying page: sliding toggles, rolling prices, credit calculator, secure strip, auth details ======== */
.buy{position:relative}
.buy-top{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:34px}
.seg{position:relative;display:inline-flex;padding:4px;background:var(--surface);border:1px solid var(--line-2);border-radius:999px;isolation:isolate}
.seg[hidden]{display:none}
.seg button{position:relative;z-index:2;padding:10px 22px;border:0;background:transparent;color:var(--dim);font-family:var(--f-display);font-weight:700;font-size:15px;letter-spacing:.12em;text-transform:uppercase;cursor:pointer;transition:color .3s;white-space:nowrap}
.seg button:hover{color:var(--fg)}
.seg button.on{color:#fff}
.seg i{position:absolute;z-index:1;top:4px;bottom:4px;left:4px;width:60px;border-radius:999px;background:linear-gradient(135deg,var(--red-hot),var(--red) 55%,var(--red-deep));box-shadow:0 8px 26px -8px var(--red-glow);transition:left .5s var(--ease),width .5s var(--ease)}
.buy-body.swap{animation:buySwap .55s var(--ease) both}
@keyframes buySwap{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.plan{overflow:hidden}
.plan .pn{transition:letter-spacing .4s var(--ease)}
.plan:hover .pn{letter-spacing:.14em}
.plan .pp .amt{font-variant-numeric:tabular-nums;display:inline-block;min-width:3ch}
.plan .pyr{font-size:12.5px;color:var(--faint);margin-top:-6px;font-family:var(--f-mono)}
.plan ul li{animation:liIn .55s var(--ease) both}
@keyframes liIn{from{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:none}}
.plan .bonus{display:flex;align-items:center;gap:8px}
.plan .bonus.none{min-height:1em}
.spark{width:9px;height:9px;background:var(--good);transform:rotate(45deg);animation:sparkle 1.8s ease-in-out infinite;box-shadow:0 0 12px var(--good)}
@keyframes sparkle{50%{transform:rotate(45deg) scale(.55);opacity:.6}}
.btn-shine{position:relative;overflow:hidden}
.btn-shine::after{content:'';position:absolute;top:0;left:-70%;width:45%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.3),transparent);transform:skewX(-20deg);transition:left .8s var(--ease)}
.btn-shine:hover::after{left:130%}

.calc{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);background:var(--surface);border:1px solid var(--line);border-radius:6px;overflow:hidden;position:relative;animation:cardIn .7s var(--ease) both}
.calc::after{content:'';position:absolute;inset:0;pointer-events:none;background:radial-gradient(600px 260px at 15% 0%,rgba(var(--red-rgb),.14),transparent 70%)}
.calc>div{position:relative;z-index:1;padding:clamp(24px,3.4vw,44px)}
.calc-r{background:linear-gradient(160deg,rgba(var(--red-rgb),.09),rgba(0,0,0,.25));border-left:1px solid var(--line)}
@media(max-width:860px){.calc{grid-template-columns:1fr}.calc-r{border-left:0;border-top:1px solid var(--line)}}
.calc-big{display:flex;align-items:baseline;gap:12px;margin:6px 0 22px;flex-wrap:wrap}
.calc-big span{font-family:var(--f-display);font-weight:900;font-size:clamp(64px,9vw,120px);line-height:.9;background:linear-gradient(180deg,#fff,#b8b8c2);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.calc-big small{font-family:var(--f-display);font-weight:700;font-size:20px;letter-spacing:.2em;text-transform:uppercase;color:var(--red-hot)}
.rng-big{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:8px;outline:none;cursor:pointer;background:linear-gradient(90deg,var(--red-hot) var(--p,10%),var(--surface-3) var(--p,10%))}
.rng-big::-webkit-slider-thumb{-webkit-appearance:none;width:30px;height:30px;border-radius:50%;background:#fff;border:6px solid var(--red);box-shadow:0 0 0 6px rgba(var(--red-rgb),.18),0 6px 22px var(--red-glow);transition:transform .2s var(--ease),box-shadow .3s}
.rng-big:hover::-webkit-slider-thumb{transform:scale(1.12);box-shadow:0 0 0 10px rgba(var(--red-rgb),.2),0 6px 26px var(--red-glow)}
.rng-big::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:6px solid var(--red);box-shadow:0 0 0 6px rgba(var(--red-rgb),.18)}
.calc-scale{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:11px;color:var(--faint);margin-top:8px}
.calc-chips{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0;align-items:center}
.calc-chips button{padding:9px 16px;background:var(--bg);border:1px solid var(--line-2);color:var(--fg);font-family:var(--f-display);font-weight:700;letter-spacing:.1em;font-size:15px;border-radius:999px;cursor:pointer;transition:all .25s var(--ease)}
.calc-chips button:hover{border-color:var(--red);background:var(--red-dim);transform:translateY(-2px)}
.cc-own{display:inline-flex;align-items:center;gap:8px;margin-left:auto;font-family:var(--f-display);font-weight:700;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.cc-own input{width:110px;background:var(--bg);border:1px solid var(--line-2);color:var(--fg);padding:9px 12px;border-radius:6px;outline:none;font-family:var(--f-mono);font-size:14px}
.cc-own input:focus{border-color:var(--red)}
.tiers{display:flex;gap:8px;flex-wrap:wrap}
.tier{display:flex;gap:8px;align-items:baseline;padding:8px 14px;border:1px dashed var(--line-2);border-radius:999px;opacity:.55;transition:all .4s var(--ease)}
.tier b{font-family:var(--f-display);font-weight:800;font-size:17px}
.tier span{font-size:12px;color:var(--dim)}
.tier.on{opacity:1;border-style:solid;border-color:var(--good);background:rgba(61,220,132,.09);color:var(--good);transform:translateY(-2px)}
.tier.on span{color:var(--good)}
.calc-price{margin:4px 0 20px}
.calc-price .amt{font-family:var(--f-display);font-weight:900;font-size:clamp(56px,7vw,92px);line-height:.95;color:#fff;font-variant-numeric:tabular-nums;text-shadow:0 0 50px var(--red-glow)}
.calc-meta{display:grid;grid-template-columns:1fr 1fr;gap:12px 22px;margin-bottom:22px}
.calc-meta div{display:flex;flex-direction:column;gap:2px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.calc-meta span{font-size:12px;color:var(--dim)}
.calc-meta b{font-family:var(--f-mono);font-weight:500;font-size:15px}
.calc-meta b.good{color:var(--good)}
.calc-note{font-size:12.5px;color:var(--faint);margin:14px 0 0;text-align:center}
.secure{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:26px;padding:18px 22px;border:1px solid var(--line);border-radius:6px;background:linear-gradient(90deg,rgba(61,220,132,.06),transparent 60%)}
.secure>svg{width:30px;height:30px;color:var(--good);flex:none}
.secure b{display:block;font-family:var(--f-display);font-weight:800;letter-spacing:.1em;text-transform:uppercase;font-size:16px}
.secure span{font-size:13.5px;color:var(--dim)}
.secure-badges{display:flex;gap:8px;flex-wrap:wrap;margin-left:auto}
.secure-badges em{font-style:normal;font-family:var(--f-mono);font-size:11px;padding:5px 10px;border:1px solid var(--line-2);border-radius:999px;color:var(--dim)}
.secure.mini{margin-top:14px;padding:12px 14px;gap:10px}
.secure.mini>svg{width:20px;height:20px}
.secure.mini span{font-size:12px}

/* auth form details */
.pw{position:relative}
.pw input{padding-right:46px!important}
.pw-eye{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:34px;height:34px;display:grid;place-items:center;background:transparent;border:0;color:var(--dim);cursor:pointer;border-radius:4px}
.pw-eye:hover{color:#fff;background:var(--surface-3)}
.pw-eye svg{width:18px;height:18px}
.pwm{height:5px;background:var(--surface-3);border-radius:4px;overflow:hidden;margin-top:-6px}
.pwm i{display:block;height:100%;width:0;transition:width .35s var(--ease),background .35s}
.pwt{display:block;font-size:12px;margin:6px 0 0}
.check{display:flex;gap:10px;align-items:flex-start;margin:6px 0 16px;font-size:13px;color:var(--dim);cursor:pointer}
.check input{margin-top:3px;accent-color:var(--red);width:16px;height:16px}
.check a{color:var(--red-hot);cursor:pointer;text-decoration:underline}
.auth-err{margin-bottom:14px;padding:11px 14px;background:rgba(var(--red-rgb),.12);border:1px solid var(--red-line);border-left:3px solid var(--red-hot);color:#ffc4c7;font-size:13.5px;border-radius:3px}
.auth-err.shake{animation:shake .45s}
@keyframes shake{20%,60%{transform:translateX(-7px)}40%,80%{transform:translateX(7px)}}
@media(prefers-reduced-motion:reduce){.spark,.plan ul li,.buy-body.swap,.calc{animation:none}}