*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#030916;--panel:#071325;--panel2:#0a1a31;--line:#20385d;--line2:#2b456d;--blue:#1688ff;--cyan:#46d9ff;--text:#f8fbff;--muted:#9facbf;--soft:#d9e9ff;--danger:#ff8d8d}html{scroll-behavior:smooth;background:var(--bg)}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:radial-gradient(circle at 50% -18%,#0a2c5c 0,#071323 34%,#030916 72%);color:var(--text);line-height:1.5;min-height:100vh}a{color:inherit;text-decoration:none}.wrap{width:min(1160px,calc(100% - 36px));margin:auto}.topbar{font-size:11px;letter-spacing:.13em;text-transform:uppercase;text-align:center;color:#b9d8ff;background:#020713;border-bottom:1px solid rgba(51,95,153,.35);padding:9px 16px;font-weight:850}.site-header{position:sticky;top:0;z-index:30;background:rgba(3,9,22,.94);backdrop-filter:blur(18px) saturate(150%);border-bottom:1px solid rgba(51,95,153,.34)}.mast{height:76px;display:grid;grid-template-columns:1fr 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/* Library-first hub and consolidated calculator workspace. */
.library-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:56px;align-items:center;padding-top:64px!important;padding-bottom:48px!important}.library-hero h1{max-width:650px}.library-cta{display:flex;align-items:center;justify-content:space-between;gap:24px;max-width:540px;margin-top:28px;padding:23px 26px;background:linear-gradient(115deg,#0863cb,#168cff);border:1px solid #51c6ff;box-shadow:0 10px 45px #0878e533,inset 0 1px #ffffff40;font-size:22px;font-weight:800;transition:background .2s,box-shadow .2s}.library-cta:hover{background:linear-gradient(115deg,#137de8,#259fff);box-shadow:0 10px 45px #0878e555}.library-cta small{display:block;font-size:12px;font-weight:500;margin-top:5px;color:#e3f4ff}.library-cta>span:last-child{font-size:32px}.evidence-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}.evidence-tags span{font-size:11px;color:#bcd4eb;border:1px solid #284663;padding:5px 9px}.library-preview{padding:32px;border:1px solid #294b70;border-top:2px solid #46d9ff;background:radial-gradient(ellipse at top right,#114b7055,transparent 70%),#081729}.library-preview h2{font-size:29px;line-height:1.2;letter-spacing:-.035em}.library-preview p{font-size:14px;line-height:1.7}.library-preview .preview-note{font-size:12px;color:#a8bbce;border-top:1px solid #27425c;padding-top:16px}.library-preview .text-link{display:inline-block;margin-top:22px;font-size:13px}.resource-heading{margin-bottom:20px}.resource-heading h2{font-size:25px;letter-spacing:-.03em}.resource-heading p{color:#aebccc;margin-top:6px;font-size:14px}.resource-secondary .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr));padding-bottom:0}.resource-secondary .tool-card{min-height:0;padding:23px}.resource-secondary .eyebrow{letter-spacing:.16em;font-size:10px}.resource-secondary .arrow{padding-top:18px;font-size:14px}.resource-scope{font-size:12px;color:#9eafc3;margin:22px 0 36px}.app-hero h1{margin-top:20px}.calculator-tabs{display:flex;gap:4px;background:#061328;border:1px solid #28466c;padding:5px}.calculator-tabs button{flex:1;min-width:0;padding:14px 10px;border:1px solid transparent;background:transparent;color:#bcd0e6;font-size:15px;font-weight:750;cursor:pointer;min-height:48px}.calculator-tabs button[aria-selected=true]{background:#0b4278;border-color:#309fe8;color:#fff}.tab-note{font-size:12px;color:#a8bdd4;padding:10px 0 20px}#calculator-panel{outline-offset:-2px}
@media(max-width:900px){.library-hero{gap:26px;grid-template-columns:1fr}.library-preview{padding:24px}.library-preview h2 br{display:none}}
@media(max-width:620px){.library-hero{padding-top:30px!important;padding-bottom:30px!important}.library-cta{padding:20px;font-size:20px;gap:12px}.library-cta small{font-size:11px}.resource-secondary .tool-grid{grid-template-columns:1fr}.calculator-tabs button{font-size:12px;padding:12px 4px}.library-preview h2{font-size:25px}}
/* Toolkit-only refinement: Atlas sharp edges, topo texture, readable guidance. */
[hidden] { display: none !important; }
body{background:linear-gradient(rgba(3,9,22,.89),rgba(3,9,22,.96)),url('/assets/brand/atlas-topographic-background.webp') center top/cover fixed}
button{font:inherit;color:inherit}button,a,input,select{touch-action:manipulation}
:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
.skip-link{position:fixed;top:8px;left:12px;z-index:100;background:#fff;color:#071325;padding:12px;transform:translateY(-160%)}.skip-link:focus{transform:none}
.hero{padding:44px 0 26px}.hero h1{font-size:clamp(36px,5.4vw,62px);line-height:1.04;letter-spacing:-.045em}.hero p{margin-top:16px;font-size:17px;max-width:820px}.notice{margin-top:18px;border-left:3px solid var(--cyan)}
.tool-card,.calculator,.result,.document-card,.guide-card,.notice,.tool-icon,.cart,.field input,.field select,.button,.doc-action,.status,.quick-links a,.search-input{border-radius:0}
.cart{width:54px;min-height:44px;font-size:13px;font-weight:750;cursor:pointer}
.how-to{margin-bottom:24px;border:1px solid #2b456d;background:rgba(10,27,49,.94);padding:20px 24px}.how-to h2{font-size:18px;letter-spacing:-.01em;margin-bottom:16px}.how-to ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;list-style:none;counter-reset:steps}.how-to li{counter-increment:steps;position:relative;padding-left:36px}.how-to li:before{content:counter(steps);position:absolute;left:0;top:0;width:25px;height:25px;display:grid;place-items:center;border:1px solid #326598;color:var(--cyan);font-size:12px;font-weight:850}.how-to strong{display:block;font-size:14px;margin-bottom:5px}.how-to li span{display:block;font-size:13px;color:#b9c9db;line-height:1.6}
.layout{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);align-items:start;padding-top:0;gap:24px}.calculator,.result{padding:26px}.calculator h2,.result h2{font-size:23px;letter-spacing:-.025em}.section-number{font-size:13px;letter-spacing:.06em;color:var(--cyan);vertical-align:middle;margin-right:10px}.result{border-top:3px solid var(--cyan);min-width:0}.result-value{font-size:clamp(28px,3.1vw,44px);line-height:1.14;overflow-wrap:anywhere;letter-spacing:-.025em}.result[data-state="empty"] .result-value{font-size:24px;color:#bfd0e3;font-weight:650}.result-secondary{font-size:18px;overflow-wrap:anywhere}.precision-note{font-size:12px;color:#a9bdd3;margin-top:16px;line-height:1.6}.result-copy{line-height:1.65}
.example{margin-top:20px;padding:16px;border:1px dashed #345b84;background:#071a30;display:flex;align-items:start;gap:16px}.example strong{font-size:13px;color:#d4eeff}.example p{font-size:14px;color:#c2d4e7;margin-top:6px}.example small{display:block;font-size:12px;color:#aabed4;margin-top:7px}.example-button,.reset-button{border:1px solid #355c88;background:#0b2039;padding:10px 14px;min-height:44px;font-size:13px;font-weight:750;cursor:pointer}.example-button{white-space:nowrap;color:var(--cyan)}.example-button:hover,.reset-button:hover{background:#123050;border-color:var(--cyan)}.reset-button{margin-top:10px;background:transparent;color:#c9daef}.calculator>.reset-button{width:100%}.field-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 16px}.field{align-content:start;min-width:0}.field label{font-size:14px;text-transform:none;letter-spacing:0;color:#e2edfa;font-weight:650}.field-hint{color:#aebfd3;font-size:12px;line-height:1.6}.field input,.field select,.search-input{min-height:48px;font-size:16px}.unit-input{position:relative}.unit-input input{padding-right:74px}.unit-input>span{position:absolute;right:13px;top:50%;transform:translateY(-50%);font-size:13px;color:#a8c9e8;pointer-events:none}.field [aria-invalid="true"]{border-color:var(--danger)}.button{background:#0864d7;margin-top:24px;min-height:48px}.error:empty{display:none}
.tool-grid{padding-top:0;gap:20px}.tool-card{min-height:248px;padding:24px;border-top:2px solid #286ca9}.tool-card h2{font-size:23px;line-height:1.15}.tool-card p{line-height:1.7}.tool-icon{margin-bottom:18px}.text-link{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}.how-to>.text-link{display:inline-block;margin-top:18px;font-size:13px}.search-label{display:block;font-weight:650;font-size:14px}.docs-toolbar{grid-template-columns:minmax(0,1fr) auto;gap:10px;margin-top:8px}.docs-toolbar .reset-button{margin:0}.docs-count{grid-column:1/-1}.empty{border:1px dashed #375a82;padding:24px;margin:20px 0}.empty h2{font-size:21px;color:#e3edfa;margin-bottom:8px}.document-card{min-width:0}.document-card h2{overflow-wrap:anywhere}.doc-action{display:inline-flex;align-items:center;min-height:44px;justify-content:center}.doc-action.disabled{opacity:1;color:#b5c4d7}.guide-grid{padding-bottom:40px}.guide-card h2{font-size:19px}#coa-guide{scroll-margin-top:150px}.footer-grid{flex-wrap:wrap}.footer-brand{letter-spacing:.08em}
@media(max-width:900px){.layout{grid-template-columns:1fr}.how-to ol{gap:16px}.nav{flex-wrap:wrap;overflow:visible;gap:10px 22px}.nav a{min-height:40px}.hero{padding-top:30px}}
@media(max-width:620px){.how-to{padding:18px}.how-to ol{grid-template-columns:1fr;gap:16px}.hero h1{font-size:36px}.hero p{font-size:16px}.hero{padding:28px 0 22px}.field-grid{grid-template-columns:1fr}.example{flex-direction:column;gap:12px}.example-button{width:100%}.calculator,.result{padding:20px}.tool-grid{gap:14px}.tool-card{min-height:220px}.nav{font-size:12px;gap:4px 17px}.mast{gap:8px}.result-value{font-size:32px}.footer-grid{gap:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}