:root{--ink:#adff2f;--muted:#8ee0ff;--paper:#000;--card:#050505;--line:#365e79;--green:#5f9ea0;--lime:#ecf600;--soft:#101a1d;--shadow:0 0 32px rgba(115,255,41,.12);--day:#5f9ea0;--fax-random:#f0e68c;--fax-random-alpha:rgba(240,230,140,.5)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}
button{color:inherit}
.site-header{height:82px;max-width:1440px;margin:auto;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none;font-weight:700;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:12px 0 12px 0;background:var(--day);color:#ffff00;border:3px solid var(--line);overflow:hidden}
svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.brand-mark img{width:100%;height:100%;object-fit:cover;object-position:center;filter:drop-shadow(0 1px 2px rgba(0,0,0,.45))}
.header-actions{display:flex;align-items:center;gap:12px}
.day-theme{padding:8px 12px;border:2px solid var(--day);color:var(--day);font-size:.68rem;font-weight:bold;letter-spacing:.08em}
.reset-button{display:flex;gap:8px;align-items:center;background:var(--day);border:3px solid var(--line);cursor:pointer;color:#ffff00;font-size:.85rem;font-weight:bold;padding:10px 14px;border-radius:12px 0 12px 0}
.reset-button svg{width:17px}
main{max-width:1440px;margin:auto;padding:0 5vw 80px}
.hero{padding:78px 0 64px}
.eyebrow,.panel-kicker{text-transform:uppercase;letter-spacing:.18em;font-weight:700;color:var(--muted);font-size:.72rem}
h1{font-size:clamp(3.3rem,7vw,6.5rem);line-height:.92;letter-spacing:-.045em;margin:14px 0 26px;max-width:980px;font-weight:900}
h1 em{font-family:Arial,Helvetica,sans-serif;font-style:normal;color:#ecf600;font-weight:900}
.intro{font-size:clamp(1rem,1.4vw,1.2rem);line-height:1.65;color:var(--muted);max-width:580px}
.workspace{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(580px,1.65fr);gap:clamp(20px,4vw,64px);background:var(--card);padding:clamp(24px,4vw,56px);border:3px solid var(--line);box-shadow:var(--shadow);border-radius:22px 0 22px 0}
.settings{border-right:1px solid var(--line);padding-right:clamp(20px,4vw,56px)}
.settings,.calculator{min-width:0}
.section-heading{display:flex;gap:15px;align-items:flex-start;margin-bottom:30px}
.section-heading .step{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:12px 0 12px 0;background:var(--day);border:2px solid var(--line);color:#ffff00;font-size:.7rem;font-weight:700}
h2{font-size:1.18rem;margin:3px 0 5px;letter-spacing:-.02em}
.section-heading p{margin:0;color:var(--muted);font-size:.83rem;line-height:1.5}
.field-grid{display:grid;gap:22px}
.field{display:grid;gap:8px;padding:9px;border:1px solid transparent;border-radius:10px;transition:border-color .2s,background-image .2s}
.field.is-valid{
  border-color:#0cbf59c9;
  background-image:
    repeating-linear-gradient(45deg,#0cbf59 0,#0cbf59 1px,transparent 4px,transparent 32px),
    repeating-linear-gradient(-45deg,#0cbf59 0,#0cbf59 1px,transparent 4px,transparent 32px)
}
.field.has-error{
  border-color:#cb1414c9;
  background-image:
    repeating-linear-gradient(45deg,#cb1414 0,#cb1414 1px,transparent 4px,transparent 32px),
    repeating-linear-gradient(-45deg,#cb1414 0,#cb1414 1px,transparent 4px,transparent 32px)
}
.field>span:first-child,.period-picker legend{font-size:.78rem;font-weight:700}
.field small{color:var(--muted);font-size:.7rem}
.field .field-error{display:none;color:#ff5c5c;font-size:.72rem;font-weight:bold}
.field.has-error .field-error{display:block}
.field.has-error .input-wrap{border-color:#ff3131;box-shadow:0 0 0 3px rgba(255,49,49,.18)}
.field.has-error .input-wrap input{color:#fff}
.field.is-valid .input-wrap{border-color:#0cbf59;box-shadow:0 0 0 2px rgba(12,191,89,.16)}
.field.is-disabled{opacity:.38;filter:grayscale(1);background-image:none;border-color:var(--line);pointer-events:none}
.field.is-disabled .input-wrap{box-shadow:none}
.input-wrap{display:flex;align-items:center;border:4px solid var(--line);background:var(--day);min-height:62px;padding:0 16px;transition:.2s;border-radius:12px 0 12px 0}
.input-wrap:focus-within{border-color:var(--ink);box-shadow:0 0 0 3px rgba(173,255,47,.18)}
.input-wrap input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#ffff00;font-weight:700;font-size:1.15rem;text-align:center}
.input-wrap b{font-size:.74rem;color:#ffff00;white-space:nowrap}
.tip{margin-top:32px;padding:18px;background:var(--soft);display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line)}
.tip svg{width:19px;flex:none;color:var(--green)}
.tip p{margin:0;font-size:.72rem;color:var(--muted);line-height:1.5}
.tip strong{display:block;color:var(--lime);margin-bottom:2px}
.tool-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-bottom:20px}
.tool-tabs button{min-width:0;border:3px solid var(--line);background:var(--day);color:#ffff00;padding:14px 10px;min-height:112px;cursor:pointer;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;text-align:left;transition:.2s;border-radius:14px 0 14px 0}
.tool-tabs button:hover{transform:translateY(-2px);border-color:#aeb8af}
.tool-tabs button[aria-selected=true]{background:#365e79;color:var(--ink);border-color:var(--ink);box-shadow:0 0 16px rgba(173,255,47,.18)}
.tool-tabs svg{width:21px}
.tool-tabs strong{display:block;font-size:.72rem;line-height:1.2}
.tool-tabs small{display:block;font-size:.58rem;margin-top:4px;opacity:.65}
.calculation-panel{background:#080d0f;padding:clamp(24px,4vw,42px);position:relative;overflow:hidden;border:2px solid var(--line);border-radius:18px 0 18px 0}
.calculation-panel:after{content:"";position:absolute;width:180px;height:180px;border:45px solid rgba(173,255,47,.035);border-radius:50%;right:-80px;top:-95px;pointer-events:none}
.panel-copy{max-width:580px}
.panel-kicker{margin:0 0 10px}
h3{font-size:clamp(1.45rem,2vw,2rem);letter-spacing:-.035em;margin:0 0 8px}
.panel-copy>p:last-child{font-size:.82rem;color:var(--muted);margin:0;line-height:1.5}
.primary-field{margin:28px 0 22px;max-width:430px}
.primary-field .input-wrap{min-height:72px;border-color:transparent}
.primary-field .input-wrap input{font-size:1.7rem}
.period-picker{border:0;padding:0;margin:0 0 22px}
.period-picker div{display:grid;grid-template-columns:repeat(5,minmax(70px,1fr));gap:2px;margin-top:9px;align-items:end;border-bottom:1px solid #7a8587}
.period-picker label{display:block;min-width:0}
.period-picker input{position:absolute;opacity:0}
.period-picker span{position:relative;display:grid;place-items:center;min-height:74px;padding:21px 4px 8px;background:var(--day);border:1px solid #111;border-bottom:0;border-radius:42px 42px 4px 4px;color:#adff2f;font-family:"Times New Roman",serif;font-size:clamp(.67rem,1.2vw,1rem);font-weight:bold;cursor:pointer;white-space:nowrap}
.period-picker span:before{content:"";position:absolute;top:4px;left:50%;width:12px;height:12px;transform:translateX(-50%);border-radius:50%;background:#fff;border:1px solid #777}
.period-picker input:checked+span{background:var(--day);border-color:#adff2f;color:#ecf600;box-shadow:inset 0 0 0 2px #adff2f,0 0 12px rgba(173,255,47,.25)}
.period-picker input:checked+span:before{background:#adff2f;border-color:#ecf600;box-shadow:0 0 8px rgba(173,255,47,.9)}
.result{background:#000;color:var(--ink);border:4px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:24px 26px;border-radius:16px 0 16px 0}
.result>div{display:grid;gap:3px;min-width:0;max-width:calc(100% - 58px)}
.result>div>span{font-size:.67rem;text-transform:uppercase;letter-spacing:.12em;opacity:.7}
.result strong{display:block;max-width:100%;font-size:clamp(2.1rem,4vw,3.6rem);line-height:1.05;letter-spacing:-.05em;color:var(--lime);overflow-wrap:anywhere;word-break:break-word}
.result strong.long-result{font-size:clamp(1.35rem,2.6vw,2.35rem);letter-spacing:-.035em}
.result strong.very-long-result{font-size:clamp(1.05rem,2vw,1.75rem);letter-spacing:-.02em}
.result strong small{font-size:.4em;font-weight:500;letter-spacing:0}
.result button{width:42px;height:42px;flex:0 0 42px;border:1px solid rgba(255,255,255,.25);background:transparent;color:white;display:grid;place-items:center;cursor:pointer}
.result button:hover{background:rgba(255,255,255,.1)}
.result button:disabled{opacity:.35;cursor:not-allowed}
.result-details{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));border:2px solid var(--line);border-top:0;background:#101516}
.detail{padding:16px 18px;border-right:1px solid var(--line)}
.detail:last-child{border:0}
.detail span{display:block;color:var(--muted);font-size:.62rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:5px}
.detail{min-width:0;overflow:hidden}
.detail strong{display:block;max-width:100%;font-size:.86rem;overflow-wrap:anywhere;word-break:break-word}
.disclaimer{margin:14px 0 0;color:var(--muted);font-size:.66rem}
.result-details.validation-message{display:block;padding:18px;color:#ff7373;font-weight:bold;font-size:.82rem;border-top:0}
footer{max-width:1440px;margin:auto;padding:28px 5vw;display:flex;justify-content:space-between;border-top:2px solid var(--line);font-size:.7rem;color:var(--muted)}
footer p{margin:0}
footer strong{color:var(--ink);margin-right:8px}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--day);border:2px solid var(--ink);color:#ffff00;padding:11px 18px;font-size:.75rem;opacity:0;pointer-events:none;transition:.25s}
.toast.show{opacity:1;transform:translate(-50%,0)}
.original-info{display:flex;justify-content:center;margin:56px auto 0;text-align:center}
.info-table{border-collapse:collapse;background:#cbffba;color:var(--day);font-family:"Times New Roman",serif;max-width:100%}
.info-table td{padding:0;text-align:center}
.history{padding:14px 20px!important}
.history p{margin:8px 0;font-weight:bold}
.qr-cell{background:var(--fax-random);padding:8px!important}
.qr-cell img{display:block;width:150px;height:150px;object-fit:contain}
.copy-row{background:#000}
.copy-row table{border-collapse:collapse;margin:auto}
.copy-row button{width:auto;min-width:150px;height:9.5vh;min-height:60px;background:var(--day);color:#365e79;border:5px solid #365e79;font-size:clamp(1rem,2.5vw,2rem);font-weight:bold;cursor:pointer}
.copy-row button:hover{color:#ffff00;border-color:var(--ink)}
.copy-decoration{width:60px;background:var(--fax-random-alpha)}
.coinIG{border-bottom-left-radius:50%}
.coinID{border-bottom-right-radius:50%}
button:focus-visible,input:focus-visible{outline:3px solid var(--lime);outline-offset:2px}
@media(max-width:900px){.workspace{grid-template-columns:1fr}.settings{border-right:0;border-bottom:1px solid var(--line);padding:0 0 32px}.field-grid{grid-template-columns:1fr 1fr}.tool-tabs{grid-template-columns:repeat(2,1fr)}.tool-tabs button:last-child{grid-column:1/-1}.tool-tabs button{min-height:90px}.hero{padding:55px 0 45px}}
@media(max-width:560px){.site-header{height:68px}.day-theme{font-size:0;width:16px;height:16px;border:0;border-radius:50%;padding:0;background:var(--day);box-shadow:0 0 10px var(--day)}.reset-button{font-size:0}.reset-button svg{width:20px}.hero{padding:45px 0 38px}h1{font-size:3.2rem}.workspace{margin:0 -5vw;padding:26px 5vw;border-left:0;border-right:0}.field-grid{grid-template-columns:1fr}.tool-tabs{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:5px}.tool-tabs button{min-width:155px;scroll-snap-align:start}.result-details{grid-template-columns:1fr}.detail{border-right:0;border-bottom:1px solid var(--line)}footer{display:grid;gap:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:560px){
  h1{font-size:clamp(2.35rem,11vw,2.8rem);overflow-wrap:anywhere}
  .workspace{overflow:hidden}
  .field,.input-wrap{min-width:0;max-width:100%}
  .period-picker div{display:flex;overflow-x:auto}
  .period-picker label{min-width:92px}
  .period-picker span{font-size:.72rem}
  .history{font-size:.7rem;padding:8px!important}
  .qr-cell{padding:4px!important}
  .qr-cell img{width:100px;height:100px}
  .copy-decoration{width:35px}
}