:root{
  --bg:#f7f2e9;
  --paper:#fffdf8;
  --paper-2:#fff8ea;
  --text:#2b241c;
  --muted:#675b4e;
  --line:#d9cbb8;
  --accent:#95551f;
  --accent-dark:#65350e;
  --green:#2f6b3f;
  --red:#a13624;
  --focus:#1d5fa7;
  --shadow:0 10px 30px rgba(74,48,23,.10);
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;font-family:Arial,"Helvetica Neue",sans-serif;background:var(--bg);color:var(--text);line-height:1.62;font-size:18px}
button,input{font:inherit}
a{color:inherit;text-decoration:none}
button,a,input,summary{touch-action:manipulation}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.skip-link{position:fixed;left:12px;top:-100px;z-index:100;padding:12px 16px;background:#fff;color:#111;border:2px solid #111;border-radius:8px}
.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px clamp(16px,5vw,70px);background:rgba(255,253,248,.97);border-bottom:2px solid var(--line);box-shadow:0 4px 18px rgba(74,48,23,.08)}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px}
.logo-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:50%;background:var(--accent);color:#fff;font-size:28px;line-height:1}
.top-nav{display:flex;gap:8px;flex-wrap:wrap}.top-nav a{padding:10px 14px;border-radius:10px;color:var(--accent-dark);font-weight:700}.top-nav a:hover{background:var(--paper-2)}
main{padding:0 clamp(16px,5vw,70px)}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center;padding:54px 0 34px}
.eyebrow{display:inline-block;margin:0;color:var(--accent-dark);background:#eadbc8;border:1px solid var(--line);border-radius:999px;padding:7px 12px;font-weight:800;font-size:15px}
h1{font-size:clamp(36px,5vw,62px);line-height:1.05;margin:18px 0;letter-spacing:-.03em}
h2{line-height:1.15}.hero-lead,.section-head>p:last-child,.calc-info p,.calc-info li,.guide-grid p,.content-section p,.faq p,.method-body p{color:var(--muted)}
.hero-lead{font-size:22px;max-width:760px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.privacy-note{margin:18px 0 0;color:var(--muted);font-size:16px}
.btn{min-height:52px;display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border:2px solid transparent;border-radius:12px;font-weight:800;cursor:pointer}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-dark)}.btn.secondary{background:var(--paper);border-color:var(--line);color:var(--accent-dark)}
.hero-card,.calculator-shell,.guide-grid article,.method-section details,.content-section,.faq details{background:var(--paper);border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{padding:24px}.hero-card h2{margin-top:0}.hero-card ol{margin:0;padding-left:26px}.hero-card li{margin:7px 0}
.scenario-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:12px 0 46px}.scenario-strip a{display:flex;align-items:center;min-height:58px;padding:12px 16px;background:var(--paper);border:2px solid var(--line);border-radius:12px;color:var(--accent-dark);font-weight:800}.scenario-strip a:hover{border-color:var(--accent)}
.calculator-shell{padding:28px;margin-bottom:54px}.section-head{margin-bottom:22px}.section-head h2{font-size:clamp(30px,4vw,42px);margin:12px 0}.section-head.narrow{max-width:780px}
.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px 0}.tab{min-height:58px;padding:12px;border:2px solid var(--line);border-radius:12px;background:#fff;color:var(--accent-dark);font-weight:800;font-size:17px;cursor:pointer}.tab:hover{border-color:var(--accent)}.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
.workspace{display:grid;grid-template-columns:.9fr 1.05fr .9fr;gap:18px;align-items:start}.calc-info,.calc-card,.result-card{padding:24px;border:2px solid var(--line);border-radius:var(--radius);background:#fff}.info-badge{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:#eadbc8;color:var(--accent-dark);font-weight:900}.calc-info h3,.calc-card h3{font-size:25px;line-height:1.2;margin:14px 0}.calc-info ul{padding-left:22px}.warning{margin-top:20px;padding:15px;border-left:5px solid var(--accent);background:var(--paper-2);border-radius:10px;color:#503b29;font-size:16px}
.calc-form{display:grid;gap:18px}.field label{display:flex;justify-content:space-between;gap:12px;margin-bottom:7px;font-size:18px;font-weight:800}.field label small{color:var(--muted);font-size:15px;font-weight:700}.field input{width:100%;min-height:56px;padding:14px 16px;border:2px solid #b9a994;border-radius:12px;background:#fff;color:var(--text);font-size:22px;font-weight:700}.field input:focus{border-color:var(--focus);box-shadow:0 0 0 4px rgba(29,95,167,.14);outline:none}.field-help{display:block;margin-top:6px;color:var(--muted);font-size:14px}.field-error{display:block;min-height:1.4em;margin-top:5px;color:var(--red);font-size:15px;font-weight:700}.field.has-error input{border-color:var(--red);background:#fff8f6}.form-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:2px}.calculate-button{flex:1 1 220px}.reset-button{flex:0 1 auto}
.result-card{position:sticky;top:94px;background:#fffdf7;border-color:#c9aa83}.result-label{display:inline-block;color:#fff;background:var(--green);border-radius:999px;padding:7px 12px;font-size:16px;font-weight:900}.result-main{display:block;margin:20px 0 12px;color:var(--green);font-size:clamp(34px,4vw,52px);line-height:1.05;font-weight:900;letter-spacing:-.03em;overflow-wrap:anywhere}.result-details{font-size:18px}.formula{margin-top:18px;padding:14px;border-radius:12px;border:1px dashed #bca98e;background:#fff8eb;color:#55483b;font-size:16px;overflow-wrap:anywhere}.result-note{margin-top:12px;color:var(--muted);font-size:14px}.copy-button{margin-top:16px;min-height:46px;padding:10px 14px;border:2px solid var(--line);border-radius:10px;background:#fff;color:var(--accent-dark);font-weight:800;cursor:pointer}.copy-button[hidden]{display:none}.copy-status{display:block;min-height:1.4em;margin-top:6px;color:var(--green);font-size:14px}.noscript-warning{padding:14px;background:#fff4d6;border:2px solid #d6af4e;border-radius:10px}
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:54px 0;background:transparent;border:0;box-shadow:none}.guide-grid .section-head{grid-column:1/-1}.guide-grid article{padding:22px}.guide-grid h3{margin:0 0 8px;font-size:21px}
.method-section{margin:54px 0}.method-section details{margin-bottom:14px;padding:0}.method-section summary,.faq summary{cursor:pointer;padding:20px 22px;font-weight:900;font-size:20px;color:var(--accent-dark)}.method-body{padding:0 22px 20px}.method-body p{margin:8px 0}
.content-section{padding:28px;margin:54px 0}.content-wrap{max-width:950px}.content-section h2{font-size:clamp(30px,4vw,40px);margin:12px 0 18px}.note-box{margin-top:24px;padding:18px 20px;border-left:6px solid var(--accent);border-radius:12px;background:var(--paper-2);color:#443324}
.faq{margin-bottom:64px}.faq details{margin-bottom:14px}.faq details p{padding:0 22px 20px;margin:0}.footer{padding:26px clamp(16px,5vw,70px);border-top:2px solid var(--line);background:var(--paper);color:var(--muted)}
@media(max-width:1120px){.hero,.workspace{grid-template-columns:1fr}.tabs{grid-template-columns:repeat(2,1fr)}.scenario-strip,.guide-grid{grid-template-columns:repeat(2,1fr)}.result-card{position:static}}
@media(max-width:680px){html{scroll-padding-top:12px}body{font-size:17px}.site-header{position:static;align-items:flex-start;flex-direction:column}.top-nav{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.top-nav a{text-align:center;background:var(--paper-2);font-size:15px;padding:10px 5px}.hero{padding-top:30px}.hero-lead{font-size:19px}.tabs,.scenario-strip,.guide-grid{grid-template-columns:1fr}.calculator-shell{padding:16px}.calc-info,.calc-card,.result-card,.content-section{padding:18px}.tab{text-align:left}.form-actions{display:grid}.btn{width:100%}.field label{align-items:flex-start;flex-direction:column;gap:2px}.field input{font-size:20px}.result-main{font-size:36px}.method-section summary,.faq summary{font-size:18px;padding:18px}.method-body,.faq details p{padding-left:18px;padding-right:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}


.quick-values{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:-4px;padding:12px 0 2px;color:var(--muted);font-size:15px}
.quick-values span{font-weight:700}
.quick-values button{min-width:56px;min-height:42px;padding:7px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;color:var(--accent-dark);font-weight:900;cursor:pointer}
.quick-values button:hover{border-color:var(--accent);background:var(--paper-2)}
.result-actions{display:grid;gap:8px;margin-top:18px}
.result-actions:empty{display:none}
.result-actions button{min-height:48px;padding:10px 14px;border:2px solid var(--green);border-radius:10px;background:#f3fbf4;color:#245431;font-weight:900;cursor:pointer;text-align:left}
.result-actions button:hover{background:#e8f6eb}
.history-panel{display:grid;grid-template-columns:minmax(190px,.7fr) 1.6fr auto;gap:18px;align-items:start;margin-top:24px;padding-top:24px;border-top:2px solid var(--line)}
.history-panel h3{margin:0 0 5px;font-size:21px}.history-panel p{margin:0;color:var(--muted);font-size:15px}
.history-list{display:grid;gap:8px}.history-item{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;min-height:50px;padding:10px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;text-align:left;cursor:pointer}
.history-item:hover{border-color:var(--accent)}.history-item span{color:var(--muted);font-size:14px}.history-item strong{color:var(--green);font-size:16px}
.history-empty{padding:12px;border:1px dashed var(--line);border-radius:10px}
.history-clear{min-height:44px;padding:8px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;color:var(--accent-dark);font-weight:800;cursor:pointer}
.workflow-section{margin:54px 0}.workflow-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:22px 0 0;padding:0;counter-reset:workflow}
.workflow-list li{list-style:none;position:relative;padding:22px 22px 22px 72px;background:var(--paper);border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.workflow-list li::before{counter-increment:workflow;content:counter(workflow);position:absolute;left:20px;top:20px;width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:var(--accent);color:#fff;font-weight:900}
.source-line{padding:12px 14px;border-left:4px solid var(--green);background:#f3f8f3;border-radius:8px}
@media(max-width:900px){.history-panel{grid-template-columns:1fr}.history-item{grid-template-columns:1fr}.workflow-list{grid-template-columns:1fr}}
@media(max-width:680px){.quick-values{align-items:stretch}.quick-values span{width:100%}.quick-values button{flex:1}.history-panel{gap:12px}.history-clear{width:100%}}

/* HTML-first: статические карточки всех калькуляторов */
.static-calculators{margin:54px 0}
.static-calc{margin-bottom:14px;background:var(--paper);border:2px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.static-calc summary{cursor:pointer;padding:20px 22px;color:var(--accent-dark);font-size:20px;font-weight:900}
.static-calc-body{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(260px,.7fr);gap:20px;padding:0 22px 22px}
.static-form fieldset{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0 0 14px;padding:0;border:0}
.static-form legend{grid-column:1/-1;margin-bottom:4px;font-weight:900;font-size:18px}
.static-form label{display:grid;gap:6px;color:var(--text);font-weight:800}
.static-form input{width:100%;min-height:48px;padding:10px 12px;border:2px solid #b9a994;border-radius:10px;background:#fff;color:var(--text);font-size:18px;font-weight:700}
.static-form input:focus{border-color:var(--focus);box-shadow:0 0 0 4px rgba(29,95,167,.14);outline:none}
.static-form .btn{width:auto}
.static-example{align-self:start;padding:16px;border-left:5px solid var(--green);border-radius:10px;background:#f3f8f3;color:#33493a;line-height:1.55}
.static-example span{color:var(--muted)}
@media(max-width:850px){.static-calc-body{grid-template-columns:1fr}.static-form fieldset{grid-template-columns:1fr}}
@media(max-width:680px){.static-calc summary{padding:18px;font-size:18px}.static-calc-body{padding:0 18px 18px}.static-form .btn{width:100%}}