/* 지방 연소 심박수 계산기: home palette and a focused calculation workspace. */
.fh-page .icon-btn{background:transparent;border-color:var(--line);color:var(--ink);width:38px;height:38px}
.fh-intro{padding:16px 0 14px}
.breadcrumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.intro-grid{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;padding-top:10px}
.intro-grid h1{font-size:25px;letter-spacing:-.8px;line-height:1.3;margin:6px 0 0;word-break:keep-all}
.intro-grid h1 span{color:var(--green)}
.intro-description{font-size:13px;color:var(--muted);line-height:1.6;word-break:keep-all;margin-top:6px}
.formula-card{display:flex;align-items:center;gap:10px;padding:10px 14px;background:#edf3e8;border:1px solid #dce6d5;border-radius:10px;white-space:nowrap}
.fh-formula-chip{padding:4px 8px;border-radius:6px;background:#fff;border:1px solid #cfe0cc;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:12px;font-weight:700;color:#4a5c4d;font-style:normal}
.fh-formula-result{color:var(--green)}
.fh-formula-op{font-size:12px;font-weight:700;color:#8ba28c}
.page-links{display:flex;gap:26px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:10px 0;margin-bottom:14px;flex-wrap:wrap}
.page-links a{color:var(--muted);font-size:12px;text-decoration:none;font-weight:650}.page-links a:first-child{color:var(--green)}.page-links a:hover{text-decoration:underline;color:var(--green)}

.calculator-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:18px;align-items:stretch}
.input-panel,.result-box{border:1px solid var(--line);border-radius:14px;padding:18px 20px 20px;min-width:0}
.input-panel{background:white}.result-box{background:#eff4e9;display:flex;flex-direction:column;border-color:#d8e3cf}
.panel-heading{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.panel-heading h2{font-size:16px;letter-spacing:-.4px;margin:0}
.step-number{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:#edf3e8;color:var(--green);font-size:10px;font-weight:750;flex-shrink:0}
.result-box .step-number{background:#dfead7}
.required-label{font-size:10px;color:var(--muted);margin-left:auto;white-space:nowrap}
.field{min-width:0}.field label{display:block;font-size:13px;font-weight:700;margin:0 0 7px}
.input-with-unit{position:relative;display:flex;align-items:center;max-width:220px}
.fh-page input[type=number]{margin:0;border:1px solid #cedace;border-radius:9px;color:var(--ink);background:#fff;min-height:49px;font-size:20px;padding:11px 45px 11px 13px;width:100%;min-width:0}
.fh-page input::placeholder{font-size:16px;color:#89958b}
.fh-page input:focus{border-color:var(--green);box-shadow:0 0 0 3px #15776012;outline:2px solid transparent}
.fh-page input[aria-invalid="true"]{border-color:#c0392b}
.unit-badge{position:absolute;right:15px;font-size:12px;color:var(--muted);pointer-events:none}
.helper{font-size:11px;color:var(--muted);line-height:1.8;margin-top:7px;word-break:keep-all}
.helper a{color:var(--green)}
.hr-error{font-size:11px;color:#c0392b;min-height:18px;margin-top:6px}
.actions{display:flex;gap:9px;margin-top:22px}.actions button{padding:13px 17px;font-size:14px;min-height:48px;border-radius:9px}
.actions .secondary{width:auto;background:#fff;border:1px solid var(--line);color:var(--muted)}.actions .secondary:hover{background:#f3f6ef;color:var(--ink)}
.input-note{font-size:10px;color:var(--muted);margin-top:12px;text-align:center}

.result-empty{padding:5px 0 25px;text-align:center}.empty-symbol{display:block;color:#90a28b;font-size:43px;line-height:1.5;font-weight:400}.result-empty h3{font-size:16px;margin:7px 0}.result-empty p{font-size:12px;color:var(--muted);line-height:1.9}
.fh-result-body.hidden,.result-empty.hidden{display:none}
.fh-big{text-align:center;margin:2px 0 16px}.fh-big strong{display:block;font-size:43px;font-weight:800;letter-spacing:-1.5px;color:var(--ink);line-height:1.2}.fh-big span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.fh-max{display:flex;justify-content:space-between;gap:12px;border-top:1px solid #d2dfc9;padding-top:16px;margin-top:4px;font-size:13px;color:#4d6354}.fh-max strong{color:var(--ink)}
.note{font-size:11px;color:var(--muted);line-height:1.9}.note.hidden{display:none}
.result-disclaimer{padding-top:18px;margin-top:auto;font-size:10px}

.reference-heading{margin:46px 0 22px}.reference-heading .eyebrow{margin-bottom:6px}.reference-heading h2{font-size:25px;letter-spacing:-.8px;margin-bottom:6px}.reference-heading>p:last-child{font-size:13px;color:var(--muted)}
.reference-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:22px;align-items:start}
.info-section{border:1px solid var(--line);border-radius:13px;background:white;padding:25px;min-width:0}
.info-section h2{font-size:18px;letter-spacing:-.4px;margin-bottom:12px}.info-section p{font-size:12px;color:var(--muted);line-height:1.9;word-break:keep-all;margin-bottom:8px}
.info-section .helper{font-size:11px}
.info-list{margin:8px 0 12px;padding-left:19px;font-size:12px;color:var(--muted);line-height:1.9}
.info-list li{margin-bottom:6px;overflow-wrap:anywhere}
.fh-formula{padding:16px;background:#f3f6ef;border-radius:10px;color:var(--ink);font-weight:700;font-size:13px;line-height:1.9;margin-bottom:12px}
.table-wrap{margin:14px 0;overflow-x:auto}.bmi-table{width:100%;border-collapse:collapse;font-size:12px}
.bmi-table th,.bmi-table td{text-align:left;padding:12px 10px;border-bottom:1px solid #e5eae1;vertical-align:middle;line-height:1.6}.bmi-table th{background:#f1f5ec;font-size:11px;font-weight:700;color:#5b6d59}.bmi-table td{color:#4a5c4d}.bmi-table th:first-child,.bmi-table td:first-child{padding-left:13px}
.fh-zone-table td:last-child{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:700;color:var(--ink)}
.fh-zone-table small{font-weight:400;color:var(--green);font-size:10px}
.bmi-table tbody tr.highlight{background:#e6efdd;outline:2px solid #79a77d;outline-offset:-2px}.bmi-table tbody tr.highlight td{color:#2b553b;font-weight:750}

.faq-section{display:grid;grid-template-columns:1fr 1.8fr;gap:40px;border-top:1px solid var(--line);padding-top:34px;margin-top:42px}
.faq-heading h2{font-size:25px;letter-spacing:-.7px;margin-bottom:8px}.faq-heading p:last-child{font-size:12px;color:var(--muted)}
.faq-item{border-bottom:1px solid var(--line)}.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 0;font-size:14px;font-weight:650;cursor:pointer;list-style:none;word-break:keep-all}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:'＋';color:var(--green);flex-shrink:0;font-weight:400;font-size:18px}.faq-item[open] summary::after{content:'−'}
.faq-answer{padding:0 24px 18px 0;font-size:13px;line-height:1.9;color:var(--muted);word-break:keep-all}
.related-section{border-top:1px solid var(--line);margin-top:38px;padding-top:30px}.related-section h2{font-size:22px;letter-spacing:-.6px;margin-bottom:20px}.related-section .eyebrow{margin-bottom:6px}
.related-links{display:grid;grid-template-columns:1fr 1fr;gap:16px}.related-links>a{display:flex;align-items:center;gap:16px;padding:20px;text-decoration:none;border:1px solid var(--line);border-radius:11px;color:var(--ink);background:#f3f6ef}.related-links>a:hover{background:#eaf1e4;border-color:#a7c1a3}.related-links>a>span:first-child{font-size:27px;color:var(--green)}.related-links>a>span:last-child{margin-left:auto;color:var(--green)}.related-links h3{font-size:14px;margin-bottom:3px}.related-links p{font-size:11px;color:var(--muted)}
.fh-page .home-footer{margin-top:42px}

@media(min-width:800px){.fh-page .header-actions{flex-direction:row-reverse;gap:20px}}
@media(max-width:900px){.formula-card{display:none}.calculator-layout{gap:14px}.input-panel,.result-box{padding:16px 18px 18px}.reference-grid{gap:16px}.info-section{padding:20px}.bmi-table th,.bmi-table td{padding:10px 7px}.required-label{display:none}.faq-section{gap:25px}}
@media(max-width:700px){.intro-grid{grid-template-columns:1fr;gap:8px}.intro-grid h1{font-size:22px}.fh-intro{padding:14px 0 10px}.page-links{gap:0;justify-content:space-between;padding:10px 0}.page-links a{font-size:11px}.calculator-layout,.reference-grid{grid-template-columns:1fr}.input-with-unit{max-width:none}.result-box{min-height:250px}.result-empty{padding:0 0 22px}.reference-heading{margin-top:30px}.faq-section{grid-template-columns:1fr;gap:22px;margin-top:26px;padding-top:24px}.related-links{grid-template-columns:1fr;gap:10px}.related-links>a{padding:18px}.required-label{display:block}.info-section{padding:21px}.bmi-table{font-size:12px}.fh-page .home-footer{margin-top:30px}}
@media(max-width:380px){.fh-page .page-wrapper{padding-left:16px;padding-right:16px}.intro-grid h1{font-size:20px}.intro-description{font-size:12px}.input-panel,.result-box{padding:14px 14px 16px}.required-label{display:none}.info-section{padding:18px 13px}.bmi-table td,.bmi-table th{padding:10px 6px}.fh-big strong{font-size:36px}}
@media(prefers-reduced-motion:reduce){.fh-page *{scroll-behavior:auto!important;transition:none!important}}