/* CalcWhen — design system
   Desk drawer: warm paper, deep indigo, one amber accent. Playful but
   classy — generous whitespace, crisp type, answers set big and sure.
   The only motion is the result gently rising when it updates. */
:root{
  --indigo:#312E81; --indigo-deep:#1E1B4B; --indigo-bright:#4338CA;
  --lav:#EFEDFB; --lav-soft:#F6F5FD;
  --ink:#232136; --ink-soft:#3B3852; --muted:#6B6884; --line:#E3E0F4;
  --bg:#FDFCF9; --card:#FFFFFF; --amber:#F59E0B; --amber-deep:#B45309;
  --radius:16px; --shadow:0 8px 28px rgba(30,27,75,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);font-size:17px;line-height:1.55}
a{color:var(--indigo-bright);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%}

/* ---------- header ---------- */
.site-header{background:rgba(253,252,249,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-in{max-width:1180px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;color:var(--indigo-deep);font-weight:800;font-size:1.3rem;letter-spacing:-.03em;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand img{width:42px;height:42px;display:block}
.main-nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
.main-nav a{color:var(--ink);padding:8px 12px;border-radius:999px;font-size:.98rem;font-weight:600}
.main-nav a:hover{background:var(--lav);text-decoration:none;color:var(--indigo)}

/* ---------- layout ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:0 18px 10px}
.ad-slot{display:flex;align-items:center;justify-content:center;background:#fff;border:1px dashed var(--line);
  border-radius:12px;color:var(--muted);font-size:.85rem;min-height:110px;margin:22px 0}

/* ---------- hero / home ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(125deg,var(--indigo-deep),var(--indigo) 52%,var(--indigo-bright) 88%);color:#fff;border-radius:0 0 26px 26px;margin:0 -18px;padding:46px 34px 40px}
.hero::after{content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;border-radius:50%;
  border:34px solid rgba(245,158,11,.28);pointer-events:none}
.hero h1{margin:0 0 10px;font-weight:800;font-size:2.3rem;line-height:1.14;letter-spacing:-.025em;max-width:640px;color:#fff}
.hero p{margin:0 0 22px;color:#D8D5F5;font-size:1.08rem;max-width:660px}
.search-row{display:flex;max-width:560px;background:#fff;border-radius:999px;padding:6px;box-shadow:var(--shadow);position:relative;z-index:1}
.search-row input{flex:1;border:0;outline:0;font-size:1.05rem;padding:10px 16px;color:var(--ink);min-width:0;width:100%;background:transparent}
.cat-block{padding:28px 0 4px}
.cat-block h2{font-size:1.45rem;margin:0 0 16px;color:var(--indigo-deep);letter-spacing:-.015em;font-weight:800}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px;display:block;color:var(--ink);box-shadow:0 2px 10px rgba(30,27,75,.05);transition:transform .12s ease,box-shadow .12s ease}
.tool-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--indigo-bright)}
.tool-card .icon{font-size:1.7rem;line-height:1;display:block;margin-bottom:10px}
.tool-card h3{margin:0 0 5px;font-size:1.08rem;color:var(--indigo-deep)}
.tool-card p{margin:0;color:var(--muted);font-size:.94rem}

/* ---------- tool pages ---------- */
.crumbs{font-size:.9rem;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted)}
main h1{font-weight:800;font-size:2rem;margin:10px 0 8px;color:var(--indigo-deep);letter-spacing:-.02em;line-height:1.2}
.answer-first{background:var(--lav);border:1px solid var(--line);border-left:4px solid var(--amber);
  border-radius:12px;padding:15px 19px;margin:0 0 20px;font-size:1.03rem;color:var(--ink-soft);max-width:860px}
.calc-card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:24px;max-width:860px}
.field{margin-bottom:15px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.97rem}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;font-size:1.06rem;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);outline:none;font-family:inherit}
.field textarea{line-height:1.5;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--indigo-bright);box-shadow:0 0 0 3px rgba(67,56,202,.16)}
.check-field label.check-label{display:flex;align-items:center;gap:10px;cursor:pointer;font-weight:600}
.check-field input[type=checkbox]{width:20px;height:20px;flex:0 0 auto;margin:0;accent-color:var(--indigo-bright)}
.with-unit{display:flex;gap:10px;align-items:stretch}
.with-unit input{flex:1;min-width:0}
.with-unit .suffix{display:flex;align-items:center;color:var(--muted);font-size:.95rem;white-space:nowrap}
.calc-btn{display:inline-block;background:var(--amber);color:#231a02;border:0;border-radius:12px;padding:14px 26px;
  font-size:1.08rem;font-weight:800;cursor:pointer;width:100%;margin-top:4px;box-shadow:0 3px 0 var(--amber-deep)}
.calc-btn:hover{filter:brightness(1.05)}
.calc-btn:active{transform:translateY(2px);box-shadow:0 1px 0 var(--amber-deep)}
.embed-note{color:var(--muted);font-size:.9rem;margin:14px 0 0}

/* result panel: deep indigo, amber rule, big confident figure */
.result{display:none;margin-top:20px;background:linear-gradient(150deg,#38339c,var(--indigo) 55%,var(--indigo-deep));
  border:1px solid var(--indigo-deep);border-top:3px solid var(--amber);border-radius:14px;padding:20px 22px;color:#DEDBFA}
.result.show{display:block;animation:rise .25s ease}
@keyframes rise{from{opacity:.35;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion: reduce){.result.show{animation:none}}
.result-big{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.result-value{font-size:2.4rem;font-weight:800;color:#fff;line-height:1.15;font-variant-numeric:tabular-nums;letter-spacing:-.02em;word-break:break-word}
.result-value.mono{font-family:ui-monospace,Consolas,Menlo,monospace;font-size:1.6rem;font-weight:700;letter-spacing:0}
.result-label{font-size:.9rem;letter-spacing:.06em;text-transform:uppercase;color:#BDB9F2;font-weight:700}
.result-rows{width:100%;border-collapse:collapse;margin-top:12px}
.result-rows th{text-align:left;font-weight:500;color:#CFCBF5;padding:6px 8px 6px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:.97rem}
.result-rows td{text-align:right;color:#fff;font-weight:600;padding:6px 0 6px 8px;border-bottom:1px solid rgba(255,255,255,.14);font-variant-numeric:tabular-nums;font-size:.97rem}
.result-rows tr:last-child th,.result-rows tr:last-child td{border-bottom:0}
.result-extra{margin-top:12px}
.result-extra:empty{display:none}
.result-extra svg{display:block;max-width:100%;height:auto;background:#fff;border-radius:8px}
.result-extra pre{white-space:pre-wrap;word-break:break-word;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:10px;padding:12px 14px;margin:0;color:#fff;font-family:ui-monospace,Consolas,Menlo,monospace;font-size:.92rem;line-height:1.5}
.result-extra ol,.result-extra ul{margin:6px 0;padding-left:22px;color:#fff}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:#fff;color:var(--indigo-deep);border-radius:999px;padding:6px 14px;font-weight:800;font-size:1.05rem;font-variant-numeric:tabular-nums}
.dice-row{display:flex;flex-wrap:wrap;gap:10px}
.die{width:52px;height:52px;background:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:1.7rem;font-weight:800;color:var(--indigo-deep);box-shadow:inset 0 0 0 2px var(--line)}
.result-note{margin:12px 0 0;color:#CFCBF5;font-size:.95rem}
.result-note:empty{display:none}

/* ---------- stage tools (countdown, typing test) ---------- */
.tool-stage{margin-top:4px}
.tool-stage:empty{display:none}
.countdown-clock{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.countdown-cell{background:linear-gradient(150deg,#38339c,var(--indigo) 55%,var(--indigo-deep));border-top:3px solid var(--amber);
  border-radius:14px;padding:16px 8px;text-align:center;color:#fff}
.countdown-cell .n{display:block;font-size:2rem;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.1}
.countdown-cell .u{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:#BDB9F2;font-weight:700}
.countdown-title{font-size:1.25rem;font-weight:800;color:var(--indigo-deep);text-align:center;margin-top:16px}
.countdown-when{text-align:center;color:var(--muted);margin-top:4px}
.type-sample{background:var(--lav-soft);border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  font-size:1.15rem;line-height:1.65;margin-bottom:12px;font-family:ui-monospace,Consolas,Menlo,monospace}
.type-sample .ok{color:#15803D}
.type-sample .bad{color:#DC2626;background:#FDE8E8;border-radius:3px}
.type-sample .todo{color:var(--ink-soft)}
.type-stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.type-stat{background:var(--lav);border:1px solid var(--line);border-radius:12px;padding:10px 16px;min-width:104px}
.type-stat .n{display:block;font-size:1.45rem;font-weight:800;color:var(--indigo-deep);font-variant-numeric:tabular-nums}
.type-stat .u{font-size:.76rem;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:700}

/* ---------- content ---------- */
.expl{max-width:860px;padding:6px 0 4px}
.expl h2{font-size:1.4rem;color:var(--indigo-deep);margin:24px 0 8px;letter-spacing:-.015em;font-weight:800}
.expl p{margin:0 0 12px}
.method{background:#fff;border:1px solid var(--line);border-left:4px solid var(--indigo-bright);border-radius:12px;padding:16px 20px;margin:20px 0 6px}
.method h3{font-size:1.12rem;color:var(--indigo-deep);margin:0 0 8px}
.method p{margin:0}
.disclaimer{border:1px solid #F3DFC0;background:#FDF6E9;border-radius:12px;padding:13px 18px;margin:18px 0 4px;font-size:.9rem;color:var(--ink-soft)}
.faq{max-width:860px}
.faq h2{font-size:1.3rem;color:var(--indigo-deep);margin:24px 0 12px;font-weight:800}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--indigo-deep)}
.faq details p{margin:8px 0 2px}
.related{padding:8px 0 30px}
.related h2{font-size:1.3rem;color:var(--indigo-deep);margin:18px 0 14px;font-weight:800}
article.page{max-width:820px;padding-bottom:16px}
article.page h1{margin-top:22px}
article.page h2{font-size:1.25rem;color:var(--indigo-deep);margin:22px 0 6px}
.embed-list li{margin-bottom:7px}

/* ---------- embed ---------- */
.embed-box{max-width:860px;margin:26px 0}
.embed-box h2{font-size:1.3rem;color:var(--indigo-deep);margin:0 0 8px;font-weight:800}
.embed-code{display:block;font-family:ui-monospace,Consolas,Menlo,monospace;font-size:.82rem;line-height:1.45;
  color:var(--ink-soft);background:var(--lav-soft);border:1px solid var(--line);border-radius:12px;padding:12px 14px;white-space:pre-wrap;word-break:break-all}
.embed-credit{color:var(--muted);font-size:.92rem}
body.embed-body{background:#fff}
.embed-wrap{max-width:700px;margin:0 auto;padding:16px 14px 10px}
.embed-h1{font-size:1.35rem;margin:2px 0 14px;color:var(--indigo-deep);font-weight:800}
.embed-wrap .calc-card{box-shadow:none}
.embed-wrap .embed-credit{text-align:center;margin:14px 0 6px}

/* ---------- footer ---------- */
.site-footer{background:var(--indigo-deep);color:#CFCBF5;margin-top:26px}
.footer-in{max-width:1180px;margin:0 auto;padding:30px 18px;display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:26px}
.site-footer a{color:#F4F3FF}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.1rem}
.footer-brand img{width:34px;height:34px}
.site-footer h4{color:#fff;margin:0 0 10px;font-size:1rem}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:7px;font-size:.95rem}
.footer-note{border-top:1px solid rgba(255,255,255,.14);padding:14px 18px;text-align:center;font-size:.87rem;color:#9D97D8;max-width:1180px;margin:0 auto}

/* ---------- mobile ---------- */
@media (max-width:720px){
  body{font-size:16px}
  .hero{padding:32px 20px 28px}
  .hero h1{font-size:1.7rem}
  main h1{font-size:1.55rem}
  .calc-card{padding:18px 16px}
  .result-value{font-size:1.85rem}
  .result-value.mono{font-size:1.25rem}
  .footer-in{grid-template-columns:1fr}
  .main-nav{margin-left:0}
  .header-in{gap:10px}
  .countdown-clock{grid-template-columns:repeat(2,1fr)}
}