:root{--bg:#030910;--panel:#07131e;--panel2:#0a1a28;--line:#183247;--blue:#0d6efd;--cyan:#25b9ff;--green:#71d000;--orange:#ffae00;--red:#ff3154;--text:#f4f8fc;--muted:#99aabc;--r:12px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 40% 0,#0a1c2b 0,transparent 35%),var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}.tool-shell{min-height:100vh;max-width:1500px;margin:auto;padding:18px}.tool-topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:rgba(3,9,16,.94);backdrop-filter:blur(14px)}.tool-brand{display:flex;align-items:center;gap:10px}.tool-brand img{width:54px;height:48px;object-fit:contain}.tool-brand strong,.tool-brand span{display:block}.tool-brand strong{font-size:25px}.tool-brand span{font-size:10px;color:var(--cyan);letter-spacing:1px}.tool-nav{display:flex;gap:8px;flex-wrap:wrap}.tool-btn,.secondary{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 13px;border:1px solid #225276;border-radius:7px;background:#081724;color:#fff;text-decoration:none;cursor:pointer}.tool-btn.primary,.secondary{background:linear-gradient(#0b4aaa,#062a68);border-color:#0e4fb5}.tool-hero{margin:12px 0;padding:28px;border:1px solid #1d4c6d;border-radius:var(--r);background:linear-gradient(135deg,rgba(13,110,253,.20),rgba(113,208,0,.08)),#06131f}.tool-hero h1{margin:0 0 8px;font-size:clamp(27px,5vw,46px)}.tool-hero p{max-width:900px;color:#c5d2de;line-height:1.55}.notice{border-left:4px solid var(--orange);padding:12px 14px;background:#241a05;border-radius:7px;line-height:1.5}.tool-section{margin-top:12px;border:1px solid var(--line);border-radius:var(--r);background:linear-gradient(145deg,rgba(7,21,33,.98),rgba(4,13,22,.98));overflow:hidden}.tool-section>header{padding:12px 15px;border-bottom:1px solid #15334a}.tool-section h2{margin:0;font-size:18px}.tool-content{padding:14px}.form-grid{display:grid;grid-template-columns:repeat(5,minmax(150px,1fr));gap:10px}.form-grid.compact{grid-template-columns:repeat(3,minmax(180px,1fr))}.form-grid label{display:flex;flex-direction:column;gap:6px;color:#c7d4df}.form-grid input,.form-grid select{width:100%;padding:10px;border:1px solid #27516b;border-radius:6px;background:#06111b;color:#fff}.results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-top:12px}.result-box{padding:14px;border:1px solid #1b3d55;border-radius:8px;background:#091927}.result-box small,.result-box strong{display:block}.result-box small{color:var(--muted)}.result-box strong{margin-top:6px;font-size:22px;color:var(--green)}.result-explanation{margin:12px 0 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dd{margin:0}.recommend-row{display:grid;grid-template-columns:1fr auto;gap:5px 10px;padding:10px;border-bottom:1px solid #173148}.recommend-row small{grid-column:1/-1;color:var(--muted)}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.guide-card{padding:15px;border:1px solid #1b3d55;border-radius:9px;background:#081724}.guide-card h3{margin-top:0;color:var(--cyan)}.guide-card p,.guide-card li{line-height:1.55;color:#c4d0dc}.swr-table{width:100%;border-collapse:collapse}.swr-table th,.swr-table td{border:1px solid #1b3d55;padding:9px;text-align:left}.swr-good{color:var(--green)}.swr-mid{color:var(--orange)}.swr-bad{color:var(--red)}.tool-hub{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.hub-card{padding:18px;border:1px solid #1b3d55;border-radius:9px;background:#081724;color:white;text-decoration:none}.hub-card span{font-size:35px}.hub-card h3{margin:8px 0}.hub-card p{color:var(--muted)}.hub-card.ready{border-color:#2d7a39}.hub-card.soon{opacity:.72}.tool-footer{position:relative;margin-top:14px;padding:18px;text-align:center;color:#8293a4}.watermark{position:fixed;right:18px;bottom:12px;z-index:50;pointer-events:none;opacity:.22;font-weight:800;letter-spacing:1px;text-align:right}.watermark small{display:block;font-weight:500}.source-note{font-size:12px;color:#8fa3b5;line-height:1.5}@media(max-width:1000px){.form-grid{grid-template-columns:repeat(2,1fr)}.cards-grid,.tool-hub{grid-template-columns:repeat(2,1fr)}.results-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.tool-shell{padding:8px}.tool-topbar{position:static;align-items:flex-start;flex-direction:column}.tool-nav{width:100%}.tool-btn{flex:1}.tool-hero{padding:18px}.form-grid,.form-grid.compact,.filter-bar,.cards-grid,.results-grid,.guide-grid,.tool-hub{grid-template-columns:1fr}.antenna-card dl div{grid-template-columns:1fr}.watermark{font-size:11px}.recommend-row{grid-template-columns:1fr}}

.calculate-main{margin-top:12px;min-width:220px}.antenna-card{position:relative;padding-bottom:34px}.card-signature{position:absolute;right:10px;bottom:8px;font-size:10px;font-weight:800;letter-spacing:.8px;color:#7f95a8;opacity:.65}.band-detail-card{position:relative;min-height:150px}.band-detail-card strong{color:var(--green)}.radio-modal-actions{margin:10px 0}.radio-tool-chip{text-decoration:none;color:#fff}.radio-tool-chip:hover{border-color:var(--cyan)}
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