*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f5f7fa;color:#172033}.wrap{width:min(1100px,calc(100% - 32px));margin:auto}.topbar{background:#fff;border-bottom:1px solid #e5e9ef;position:sticky;top:0;z-index:10}.head-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#172033;font-weight:800}.brand img{width:58px;height:auto}.back{color:#075cab;text-decoration:none;font-weight:700}.hero{padding:46px 0 28px}.eyebrow{font-size:.82rem;text-transform:uppercase;letter-spacing:.12em;color:#075cab;font-weight:800}.hero h1{font-size:clamp(2rem,5vw,3.2rem);margin:.35rem 0 .6rem}.hero p{max-width:760px;line-height:1.65;color:#566174;font-size:1.05rem}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;padding-bottom:28px}.card{background:#fff;border:1px solid #e3e8ef;border-radius:20px;padding:26px;box-shadow:0 12px 35px rgba(25,45,70,.07)}.icon{font-size:2rem}.card h2{margin:.45rem 0 .35rem;font-size:1.35rem}.desc{color:#5b6678;line-height:1.55;min-height:48px}form{display:grid;gap:14px;margin-top:20px}label{display:grid;gap:6px;font-weight:700;font-size:.94rem}input{width:100%;padding:13px 14px;border:1px solid #cfd7e2;border-radius:10px;font:inherit;background:#fff}input:focus{outline:3px solid rgba(7,92,171,.12);border-color:#075cab}button{border:0;border-radius:10px;background:#075cab;color:#fff;padding:13px 16px;font:inherit;font-weight:800;cursor:pointer}.result{display:none;margin-top:18px;padding:16px;border-radius:12px;background:#eef5fb;border:1px solid #d6e5f2}.result.show{display:block}.value{font-size:1.7rem;font-weight:900;margin-bottom:7px}.sub{color:#586476;line-height:1.45}.status{display:inline-block;padding:5px 10px;border-radius:999px;font-weight:800;margin-bottom:8px}.good{background:#dff6e8;color:#176b39}.worn{background:#fff1cc;color:#8a5c00}.bad{background:#fde1e1;color:#a32929}.note{font-size:.84rem;color:#6a7484;line-height:1.5;margin:16px 0 0}.warning{background:#fff8e7;border:1px solid #f0d999;border-radius:14px;padding:17px 18px;line-height:1.55;margin-bottom:44px}footer{border-top:1px solid #e0e5eb;background:#fff;color:#687384;padding:20px 0;font-size:.9rem}@media(max-width:760px){.grid{grid-template-columns:1fr}.head-inner{align-items:flex-start;padding:12px 0;flex-direction:column;gap:8px}.brand img{width:48px}.hero{padding-top:32px}.desc{min-height:0}}
select{width:100%;padding:13px 14px;border:1px solid #cfd7e2;border-radius:10px;font:inherit;background:#fff}select:focus{outline:3px solid rgba(7,92,171,.12);border-color:#075cab}.conditional{display:none}.conditional.show{display:grid}

[hidden]{display:none!important}

#glycolConcentrationLabel[hidden]{display:none!important}

.optional{font-weight:500;color:#7a8492;font-size:.8rem}.dew-scale{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.dew-scale span{font-size:.78rem;padding:4px 8px;border-radius:999px;background:#eef1f5;color:#687384}

/* Rychlá navigace */
.quick-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.quick-nav a{display:inline-flex;align-items:center;gap:7px;padding:10px 14px;border:1px solid #cbdcf2;border-radius:999px;background:#fff;color:#0759a6;text-decoration:none;font-weight:700;font-size:.92rem;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.quick-nav a:hover{background:#eef6ff;border-color:#8db9e8}
.card{scroll-margin-top:24px}
@media(max-width:640px){.quick-nav{display:grid;grid-template-columns:1fr 1fr;gap:8px}.quick-nav a{justify-content:center;text-align:center;padding:10px 8px;font-size:.84rem}}

.field-help{font-weight:500;color:#6a7484;font-size:.8rem;line-height:1.4;margin-top:2px}.result-block+.result-block{margin-top:16px;padding-top:16px;border-top:1px solid #d6e5f2}.result-title{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:#687384;font-weight:800;margin-bottom:4px}

/* Chladivový okruh – testovací chráněná část */
.lock-badge{font-size:.72rem;display:inline-block;vertical-align:middle;padding:4px 7px;border-radius:999px;background:#fff1cc;color:#8a5c00;margin-left:6px}
.password-gate{display:grid;gap:12px;margin-top:20px;padding:18px;border:1px dashed #b9c8d9;border-radius:14px;background:#f8fbff}
.gate-message{min-height:1.2em;font-size:.86rem;font-weight:700;color:#a32929}
.protected-ok{display:inline-block;margin-top:18px;padding:7px 11px;border-radius:999px;background:#dff6e8;color:#176b39;font-weight:800;font-size:.84rem}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.refrigerant-card{grid-column:1/-1}
.refrigerant-result{background:#f7f9fc}
.ref-summary{font-size:1.28rem;font-weight:900;margin:4px 0 8px}
.ref-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:14px 0}
.ref-metric{padding:11px;border-radius:10px;background:#fff;border:1px solid #e0e6ee;font-size:.78rem;color:#697485}
.ref-metric strong{display:block;color:#172033;font-size:1.1rem;margin-top:3px}
.ref-list{margin:.4rem 0 0;padding-left:20px;color:#4d596b;line-height:1.5}
.ref-list li+li{margin-top:7px}
.ref-safety{margin-top:14px;padding:12px 14px;border-radius:12px;background:#fff8e7;border:1px solid #f0d999;font-size:.85rem;line-height:1.5}
.quick-nav .locked-link{border-style:dashed}
@media(max-width:760px){.form-grid{grid-template-columns:1fr}.ref-metrics{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.ref-metrics{grid-template-columns:1fr}}

.ai-button{margin-top:10px;background:#172033}.ai-button:disabled{opacity:.65;cursor:wait}.ai-result{margin-top:14px}.ai-text{line-height:1.55;white-space:normal}.ai-result .result-title{font-weight:800;margin-bottom:10px}

textarea{width:100%;min-height:110px;resize:vertical;padding:13px 14px;border:1px solid #cfd7e2;border-radius:10px;font:inherit;background:#fff}textarea:focus{outline:3px solid rgba(7,92,171,.12);border-color:#075cab}.full-field{grid-column:1/-1}

/* v23 – přehledné diagnostické sekce */
.diag-section{margin:18px 0 0;padding:18px;border:1px solid #dfe6ee;border-radius:16px;background:#fbfcfe}
.diag-section h3{margin:0 0 14px;font-size:1.05rem}.diag-section h4{margin:18px 0 10px}
.diag-section-ref{border-left:4px solid #8ab7df}.diag-section-water{border-left:4px solid #9bc8c5}.diag-section-electric{border-left:4px solid #d8c47d}.diag-section-tech{border-left:4px solid #b9a7cc}
.important-field{background:#f5f9fd;padding:9px;border-radius:10px}.section-hint,.history-note{font-size:.84rem;line-height:1.45;color:#5e6a7b}.history-note{margin-top:12px;padding:11px 13px;background:#eef5fb;border-radius:10px}.split-block{margin-top:14px;padding-top:4px;border-top:1px dashed #ccd6e1}
.diag-completeness{padding:14px 16px;border-radius:14px;background:#f4f7fa;border:1px solid #dfe6ee}.diag-completeness>div:first-child{display:flex;justify-content:space-between;gap:12px}.diag-completeness small{display:block;margin-top:7px;color:#697485}.diag-progress{height:9px;background:#dde4ec;border-radius:99px;overflow:hidden;margin-top:9px}.diag-progress span{display:block;height:100%;width:0;background:currentColor;color:#2f7d50;border-radius:99px;transition:width .2s ease}


/* v24 – COP a p-h diagram */
.cop-highlight{border-color:#9fc7a9;background:#f1faf3}.cop-highlight strong{font-size:1.35rem}.cop-note{margin:12px 0;padding:11px 13px;border-radius:10px;background:#eef5fb;border:1px solid #d6e5f2;font-size:.84rem;line-height:1.45}.cop-warning{background:#fff8e7;border-color:#f0d999}.ph-panel{margin-top:18px;padding-top:16px;border-top:1px solid #d6e5f2}.ph-canvas{display:block;width:100%;height:360px;background:#fff;border:1px solid #dde4ec;border-radius:12px}.ph-legend{margin-top:8px;font-size:.82rem;color:#596679}.ph-legend strong{color:#075cab}@media(max-width:640px){.ph-canvas{height:300px}}

/* v26 – p-h diagram */
.ph-info-box{margin:14px 0 18px;padding:14px 16px;border:1px solid #cbd9e8;border-radius:12px;background:#f7fbff;display:flex;flex-direction:column;gap:5px}
.ph-info-box strong{font-size:1.02rem}.ph-info-box span{line-height:1.4}
.ph-requirements{font-size:.9rem;color:#6b7280}.ph-requirements.ready{color:#18794e;font-weight:600}
.ph-panel{margin-top:18px;padding:16px;border:1px solid #d9e2ec;border-radius:14px;background:#fff;box-shadow:0 5px 18px rgba(15,35,55,.06)}
.ph-panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:8px}
.ph-subtitle{font-size:.88rem;color:#6b7280;margin-top:2px}.ph-badge{font-size:.75rem;padding:4px 8px;border-radius:999px;background:#eef4fa;color:#42566c;white-space:nowrap}
.ph-canvas{display:block;width:100%;height:360px;border:1px solid #edf1f5;border-radius:10px;background:linear-gradient(180deg,#fbfdff,#fff)}
.ph-cycle-legend{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:7px;margin:12px 0 4px;font-size:.86rem}
.ph-cycle-legend span:not(.ph-arrow){padding:5px 8px;border-radius:8px;background:#f3f6f9}.ph-cycle-legend b{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#075cab;color:white;margin-right:4px}
.ph-arrow{color:#7b8794;font-weight:700}
@media(max-width:600px){.ph-canvas{height:310px}.ph-panel{padding:11px}.ph-badge{display:none}}

/* v27 – CoolProp status */
.ph-engine-state{font-size:.9rem;font-weight:600;color:#596779}
.ph-engine-state.ready{color:#18794e}
.ph-engine-state.fallback{color:#a15c00}