:root{--ink:#0a1614;--deep:#071311;--panel:#0e211e;--line:rgba(178,255,219,.16);--mint:#35e7ad;--mint2:#b8ffdd;--amber:#ffbd43;--paper:#f2f5eb;--card:#ffffff;--soft:#dce7d6;--muted:#6e7c73;--danger:#ff705c;--shadow:0 28px 80px rgba(0,0,0,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.55}a{color:inherit}img{max-width:100%}.shell{width:min(1180px,calc(100% - 36px));margin:0 auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(7,19,17,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);color:#fff}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none}.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--mint),#1b8d72);display:grid;place-items:center;color:#071311;font-weight:950}.brand b{display:block;letter-spacing:-.02em}.brand span{display:block;color:#9eb8ae;font-size:12px;margin-top:-2px}.nav-links{display:flex;gap:22px;align-items:center;font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#c5d7d0}.nav-links a{text-decoration:none}.nav-cta{border:1px solid rgba(53,231,173,.5);border-radius:999px;padding:10px 16px;color:var(--mint2)!important;background:rgba(53,231,173,.08)}.hero{background:radial-gradient(circle at 20% 8%,rgba(53,231,173,.22),transparent 28%),radial-gradient(circle at 75% 20%,rgba(255,189,67,.16),transparent 25%),linear-gradient(180deg,#081614 0%,#07110f 100%);color:white;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr .86fr;gap:42px;padding:92px 0 66px;align-items:center}.pill{display:inline-flex;align-items:center;gap:8px;color:#10211d;background:var(--mint2);font-weight:950;font-size:12px;letter-spacing:.12em;text-transform:uppercase;border-radius:999px;padding:8px 12px}.hero h1{font-size:clamp(48px,7vw,94px);line-height:.9;letter-spacing:-.075em;margin:22px 0 20px}.lead{font-size:20px;color:#d9e9e2;max-width:690px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{border:0;border-radius:999px;padding:14px 19px;font-weight:950;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.btn-primary{background:var(--mint);color:#061411}.btn-dark{background:#0f211e;color:white;border:1px solid rgba(255,255,255,.12)}.btn-amber{background:var(--amber);color:#1f1603}.blueprint{background:linear-gradient(180deg,rgba(14,33,30,.92),rgba(8,18,16,.98));border:1px solid var(--line);border-radius:34px;padding:18px;box-shadow:var(--shadow);position:relative;min-height:520px}.blueprint:before{content:"";position:absolute;inset:0;border-radius:34px;background-image:linear-gradient(rgba(184,255,221,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(184,255,221,.06) 1px,transparent 1px);background-size:28px 28px;mask:linear-gradient(#000,transparent 86%)}.calc-preview{position:relative;z-index:1;background:rgba(8,18,16,.72);border:1px solid rgba(184,255,221,.18);border-radius:26px;padding:20px}.calc-preview h2{font-size:18px;margin:0 0 14px;color:#fff}.preview-fig{height:230px;border-radius:22px;border:1px solid rgba(184,255,221,.16);background:radial-gradient(circle at 55% 45%,rgba(53,231,173,.18),transparent 38%),#0a1815;position:relative;overflow:hidden}.trench-shape{position:absolute;left:11%;right:11%;top:37%;height:70px;border:2px solid var(--mint);transform:skewX(-20deg);box-shadow:0 0 24px rgba(53,231,173,.45),inset 0 0 30px rgba(53,231,173,.12)}.measure{position:absolute;color:#b8ffdd;font-size:12px;font-weight:900;background:rgba(0,0,0,.3);border:1px solid rgba(184,255,221,.22);border-radius:999px;padding:5px 9px}.m1{left:16%;top:24%}.m2{right:15%;top:50%}.m3{left:35%;bottom:24%}.preview-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);border-radius:18px;padding:13px}.stat b{font-size:25px;display:block;color:#fff}.stat span{font-size:11px;color:#91aaa1;text-transform:uppercase;font-weight:900;letter-spacing:.08em}.section{padding:72px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section h2{font-size:clamp(32px,4.4vw,58px);line-height:.95;letter-spacing:-.055em;margin:0}.section-head p{max-width:520px;color:#586a61;font-size:17px;margin:0}.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool-card{background:white;border:1px solid var(--soft);border-radius:26px;padding:22px;text-decoration:none;min-height:230px;position:relative;overflow:hidden;transition:.2s transform,.2s box-shadow}.tool-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(34,54,45,.12)}.tool-card:after{content:"";position:absolute;width:92px;height:92px;border-radius:50%;background:#dff7e9;right:-35px;top:-35px}.tool-card code{display:inline-flex;background:#0b1916;color:var(--mint);border-radius:999px;padding:6px 10px;font-weight:950;font-size:12px}.tool-card h3{margin:36px 0 8px;font-size:20px;line-height:1.08;letter-spacing:-.02em}.tool-card p{margin:0;color:#5d6c65;font-size:14px}.badge{display:inline-flex;margin-top:18px;border-radius:999px;background:#eff6ee;color:#20302a;font-size:12px;font-weight:900;padding:7px 10px}.badge.live{background:#d9fff0;color:#063428}.dark-section{background:#071311;color:white;padding:76px 0}.flow-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:18px}.flow-card,.seq{background:#0e211e;border:1px solid var(--line);border-radius:28px;padding:26px}.flow-card h2{font-size:48px;line-height:.95;letter-spacing:-.05em;margin:0 0 14px}.flow-card p,.seq span{color:#aac1b8}.sequence{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.seq i{width:34px;height:34px;display:grid;place-items:center;background:var(--mint);color:#061411;border-radius:50%;font-style:normal;font-weight:950}.seq b{display:block;margin:16px 0 6px;font-size:18px}.calc-page{background:var(--paper);min-height:100vh}.calc-hero{color:white;padding:70px 0 86px;background:radial-gradient(circle at 18% 10%,rgba(53,231,173,.16),transparent 30%),linear-gradient(180deg,#071311 0,#0d1f1c 100%)}.crumb{font-size:13px;color:#9ab2a8;text-decoration:none;font-weight:800}.calc-hero h1{font-size:clamp(40px,6vw,72px);line-height:.9;letter-spacing:-.06em;margin:18px 0}.calc-hero p{max-width:760px;color:#d2e6df;font-size:19px}.calc-layout{display:grid;grid-template-columns:1fr 360px;gap:20px;align-items:start;padding-bottom:70px}.calc-panel{background:#fff;border:1px solid var(--soft);border-radius:32px;padding:24px;box-shadow:0 20px 70px rgba(29,47,39,.14)}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.field label{display:block;font-weight:900;font-size:13px;margin-bottom:6px;color:#20332c}.field small{color:#77867f}.field input{width:100%;border:1px solid #d5dfd8;border-radius:16px;padding:13px 13px;font-size:16px;background:#fbfdf9}.result-box{margin-top:20px;background:#0b1916;color:white;border-radius:26px;padding:22px}.result-box h2{margin:0 0 8px;font-size:22px}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}.result-metric{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:14px}.result-metric b{display:block;font-size:25px;color:var(--mint2)}.result-metric span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#93aca2;font-weight:900}.notice{border-left:4px solid var(--amber);background:#fff6dd;color:#3f2d08;border-radius:16px;padding:14px 16px;margin-top:18px}.side-card{background:#fff;border:1px solid var(--soft);border-radius:30px;padding:22px;box-shadow:0 18px 54px rgba(29,47,39,.1);margin-bottom:16px}.side-card h3{margin:0 0 12px;font-size:21px;letter-spacing:-.025em}.bullets{padding-left:18px;margin:0}.bullets li{margin:9px 0}.related a{display:block;text-decoration:none;border:1px solid #d9e6df;border-radius:16px;padding:13px 14px;margin:10px 0;font-weight:900;background:#fbfdf9}.related a:hover{border-color:var(--mint);background:#edfff7}.footer{background:#071311;color:#9db6ad;padding:36px 0}.footer-grid{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer b{color:white}.warning{font-size:13px;color:#64756d}.tools-page .hero-grid{grid-template-columns:1fr}.small-hero{padding:70px 0 42px}.guide-page{padding-bottom:70px}.guide-body{background:white;border:1px solid var(--soft);border-radius:30px;padding:28px}.guide-body h2{font-size:30px;line-height:1;margin:0 0 10px}.guide-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}.guide-list div{border:1px solid #dce6df;border-radius:20px;padding:16px;background:#fbfdf9}@media(max-width:980px){.hero-grid,.calc-layout,.flow-grid{grid-template-columns:1fr}.tool-grid{grid-template-columns:repeat(2,1fr)}.nav-links{display:none}.blueprint{min-height:auto}.calc-layout{padding-bottom:42px}.calc-page{background:var(--paper)}}@media(max-width:620px){.shell{width:min(100% - 24px,1180px)}.hero-grid{padding:56px 0 40px}.hero h1,.calc-hero h1{font-size:48px}.lead,.calc-hero p{font-size:16px}.tool-grid,.sequence,.form-grid,.result-grid,.preview-stats,.guide-list{grid-template-columns:1fr}.section-head{display:block}.section{padding:46px 0}.flow-card h2{font-size:36px}.nav{height:64px}.brand span{display:none}.calc-panel,.side-card{border-radius:22px;padding:18px}.blueprint{border-radius:24px;padding:12px}.calc-preview{border-radius:20px}.hero-actions .btn{width:100%}}
.seq.light{background:#fff;color:#10211d;border-color:#dce6df}.seq.light span{color:#5d6c65}.guide-body p{color:#35463f;font-size:17px}.guide-body a{font-weight:900;color:#064c38}.guide-body h2+ul{margin-top:8px}.pill{color:#071311;background:#d9fff0}.crumb{display:inline-block;margin-bottom:10px}.calc-hero .pill{margin-top:16px!important}.footer .warning{color:#bfd2ca}.calc-hero p.pill{color:#071311!important;background:#d9fff0!important;font-size:12px!important;line-height:1.2;max-width:max-content}

/* UKDH brand/rankability upgrade 2026-05-08 */
.brand-logo{width:48px;height:48px;border-radius:14px;box-shadow:0 12px 34px rgba(0,0,0,.28);flex:0 0 auto}.brand-mark{display:none}.brand-copy b{font-size:17px;color:#fff}.brand-copy span{font-size:12px;color:#b8d5ca;letter-spacing:.02em}.nav-links{gap:16px}.nav-links a{white-space:nowrap}.btn-ghost{background:rgba(255,255,255,.08);color:#d9fff0;border:1px solid rgba(255,255,255,.16)}.hero-proof{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.hero-proof span{border:1px solid rgba(184,255,221,.22);background:rgba(184,255,221,.08);border-radius:999px;padding:8px 11px;color:#d9fff0;font-size:13px;font-weight:850}.site-visual{background:linear-gradient(180deg,rgba(14,33,30,.96),rgba(8,18,16,.98));border:1px solid var(--line);border-radius:34px;padding:16px;box-shadow:var(--shadow);position:relative}.site-visual img{display:block;width:100%;height:auto;border-radius:26px}.visual-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.visual-notes span{background:#10231f;border:1px solid rgba(184,255,221,.15);border-radius:16px;padding:12px;color:#bdd3ca;font-size:13px}.visual-notes b{display:block;color:#d9fff0;font-size:15px}.rank-trust-panel{background:#eef4ea;padding-top:58px}.trust-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:18px}.trust-cards article{background:#fff;border:1px solid var(--soft);border-radius:28px;padding:26px;box-shadow:0 18px 45px rgba(34,54,45,.08)}.trust-cards article span{display:inline-flex;background:#071311;color:var(--mint);border-radius:999px;padding:6px 10px;font-weight:950;font-size:12px}.trust-cards h2{font-size:25px;line-height:1.05;margin:18px 0 10px;letter-spacing:-.03em}.trust-cards p{margin:0;color:#53655c}.route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.route-grid a{background:#0d1f1c;color:#d9fff0;border:1px solid rgba(184,255,221,.16);border-radius:22px;padding:20px;text-decoration:none;min-height:138px;transition:.18s transform,.18s border-color}.route-grid a:hover{transform:translateY(-2px);border-color:rgba(53,231,173,.55)}.route-grid b{display:block;font-size:18px;line-height:1.08;margin-bottom:9px}.route-grid span{color:#a9c4b8;font-size:14px}.tool-category-strip{background:#eef4ea;padding-bottom:0}.tool-category-strip+.section{padding-top:40px}.footer .brand-mini{display:flex;align-items:center;gap:10px}
@media(max-width:1120px){.nav{height:auto;padding:12px 0;align-items:flex-start;flex-direction:column;gap:10px}.nav-links{display:flex;flex-wrap:wrap;gap:8px 10px;width:100%}.nav-links a{font-size:12px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);border-radius:999px;padding:8px 10px}.nav-links .nav-cta{padding:8px 12px;background:rgba(53,231,173,.12)}}
@media(max-width:980px){.nav-links{display:flex!important}.site-visual{max-width:720px}.trust-cards,.route-grid{grid-template-columns:1fr 1fr}.visual-notes{grid-template-columns:1fr}.tool-category-strip+.section{padding-top:30px}}
@media(max-width:620px){.brand .brand-copy,.brand .brand-copy span,.brand .brand-copy b{display:block!important}.brand-copy b{font-size:16px}.brand-copy span{font-size:11px}.brand-logo{width:42px;height:42px}.nav{height:auto!important}.nav-links{display:flex!important;overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px}.nav-links a{flex:0 0 auto}.hero h1,.calc-hero h1{font-size:43px!important;letter-spacing:-.055em}.hero-proof{gap:7px}.hero-proof span{font-size:12px}.trust-cards,.route-grid{grid-template-columns:1fr}.trust-cards article{padding:22px}.route-grid a{min-height:auto}.site-visual{border-radius:24px;padding:10px}.site-visual img{border-radius:18px}}


/* UKDH mobile polish 2026-05-08 */
@media(max-width:620px){.nav-links{flex-wrap:wrap!important;overflow-x:visible!important;padding-bottom:0!important;gap:7px!important}.nav-links a{font-size:11px!important;padding:7px 9px!important}.nav-links .nav-cta{order:-1;background:rgba(53,231,173,.18)!important}.calc-hero .shell{padding-top:32px!important;padding-bottom:28px!important}.calc-hero h1{margin-bottom:12px!important}.calc-hero p:not(.pill){font-size:15px!important}.calc-layout{margin-top:22px!important}.tool-card h3{margin-top:24px!important}}
@media(min-width:621px) and (max-width:1120px){.nav-links a{font-size:12px!important}}

/* UKDH specialist expansion 2026-05-08 */
.tool-card .tool-cluster{display:block;margin-top:10px;color:#6d7d75;font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.calc-hero .tool-count-pill{display:inline-flex;margin-left:8px}.calc-page .related a[href^="/tools/"]{background:#f3fbf7;color:#083d2d}.result-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}.tools-page .section-head p{max-width:760px}

/* UKDH ultra specialist + live API tools 2026-05-08 */
.api-actions{margin:18px 0 14px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}.api-actions .btn{cursor:pointer}.api-actions small{color:#63746c;font-weight:750}.api-panel{margin-top:14px;border:1px solid rgba(53,231,173,.24);background:linear-gradient(180deg,#f7fff9,#eef8f2);border-radius:22px;padding:18px;box-shadow:0 14px 34px rgba(18,48,37,.08)}.api-panel:empty{display:none}.api-panel h3{margin:0 0 8px;font-size:19px}.api-panel p{margin:0 0 12px;color:#405249}.api-panel .api-source{font-size:12px;color:#66776f;margin-top:10px}.field input[type="text"]{width:100%;border:1px solid var(--soft);background:#fff;border-radius:15px;padding:13px 14px;font:inherit;font-weight:850;color:#0a1614}.field input[type="text"]:focus{outline:3px solid rgba(53,231,173,.26);border-color:#35e7ad}.tool-card.api-card{border-color:rgba(53,231,173,.42);background:linear-gradient(180deg,#ffffff,#f2fff8)}.tool-card .api-dot{display:inline-flex;margin-top:8px;color:#071311;background:#d9fff0;border-radius:999px;padding:5px 8px;font-size:10px;font-weight:950;letter-spacing:.08em;text-transform:uppercase}
@media(max-width:620px){.api-actions{align-items:stretch}.api-actions .btn{width:100%;justify-content:center}.api-panel{padding:15px;border-radius:18px}}

/* UKDH BGS/API result contrast polish 2026-05-08 */
.api-panel .result-metric b{color:#071311!important;text-shadow:none!important}.api-panel .result-metric span{color:#405249!important}.api-panel .result-metric{background:#fff;border-color:#cfe7da}

/* UKDH live API CTA visibility polish 2026-05-08 */
.api-actions{margin:22px 0 18px;padding:16px;background:linear-gradient(135deg,#f7fff4 0%,#fff7dc 100%);border:1px solid #c7e2d4;border-radius:24px;box-shadow:0 16px 42px rgba(18,48,37,.11);display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.api-action-label{flex:1 0 100%;margin:0 0 2px;color:#0b1916;font-weight:950;font-size:15px;letter-spacing:-.01em}.api-action-label strong{display:inline-flex;align-items:center;justify-content:center;margin-right:8px;background:#0b1916;color:#ffcf4a;border-radius:999px;padding:4px 9px;font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.api-actions .btn,.api-actions .api-run-btn{background:linear-gradient(135deg,#ffcf4a 0%,#35e7ad 100%)!important;color:#061411!important;border:2px solid rgba(6,20,17,.88)!important;border-radius:999px;box-shadow:0 9px 0 rgba(6,20,17,.9),0 22px 34px rgba(18,48,37,.18);font-size:17px;line-height:1.1;min-height:58px;min-width:278px;padding:17px 25px;text-align:center;text-decoration:none;text-transform:none;white-space:normal}.api-actions .btn:hover,.api-actions .api-run-btn:hover{transform:translateY(-1px);box-shadow:0 10px 0 rgba(6,20,17,.9),0 26px 38px rgba(18,48,37,.2)}.api-actions .btn:active,.api-actions .api-run-btn:active{transform:translateY(5px);box-shadow:0 4px 0 rgba(6,20,17,.9),0 14px 20px rgba(18,48,37,.16)}.api-actions .btn:focus-visible,.api-actions .api-run-btn:focus-visible{outline:4px solid rgba(255,207,74,.65);outline-offset:4px}.api-actions small{display:block;max-width:560px;color:#31483f;font-size:14px;font-weight:800;line-height:1.45}.api-panel:not(:empty){scroll-margin-top:110px}
@media (max-width:720px){.api-actions{display:block;padding:15px;margin:20px 0}.api-action-label{font-size:14px;margin-bottom:11px}.api-action-label strong{margin-bottom:6px}.api-actions .btn,.api-actions .api-run-btn{width:100%;min-width:0;min-height:62px;font-size:16px;padding:17px 18px}.api-actions small{margin-top:12px}.api-panel:not(:empty){scroll-margin-top:82px}}


/* UKDH quick-flow reduction: hide optional assumptions behind smart defaults */
.quick-flow-note{grid-column:1/-1;margin:0 0 2px;padding:12px 14px;border:1px solid rgba(53,231,173,.30);background:linear-gradient(180deg,#f7fff9,#effaf4);border-radius:18px;color:#244138;font-weight:850;font-size:13px}.quick-flow-note b{color:#071311}.smart-assumptions{grid-column:1/-1;border:1px solid #d8e8df;background:#fbfefb;border-radius:18px;overflow:hidden;margin-top:2px}.smart-assumptions summary{list-style:none;cursor:pointer;display:flex;gap:12px;align-items:center;justify-content:space-between;padding:14px 16px;font-weight:950;color:#0b3328}.smart-assumptions summary::-webkit-details-marker{display:none}.smart-assumptions summary:after{content:'+';display:inline-grid;place-items:center;min-width:28px;height:28px;border-radius:999px;background:#d9fff0;border:1px solid rgba(53,231,173,.45);font-size:20px;line-height:1}.smart-assumptions[open] summary:after{content:'–'}.smart-assumptions summary small{display:block;margin-top:3px;color:#66776f;font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.06em}.smart-assumptions .assumption-hint{margin:0 16px 12px;color:#566b62;font-size:13px}.smart-assumptions .advanced-fields-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:0 16px 16px}.smart-assumptions .field{min-width:0}@media(max-width:620px){.quick-flow-note{font-size:12px}.smart-assumptions summary{align-items:flex-start}.smart-assumptions .advanced-fields-grid{grid-template-columns:1fr}}

.smart-assumptions:not([open]) .advanced-fields-grid,.smart-assumptions:not([open]) .assumption-hint{display:none!important}

.form-grid>.api-actions,.input-grid>.api-actions{grid-column:1/-1}
[data-calculator]{scroll-margin-top:92px}

/* UKDH breadcrumb/category pill separation 2026-05-09
   The category pill is a <p class="pill"> after the back/breadcrumb link. Global
   .pill made it inline-flex, so on desktop it sat on the same baseline as
   the breadcrumb and visually collided. Keep the breadcrumb on its own line. */
.calc-hero .crumb{display:inline-flex;align-items:center;margin-bottom:0;vertical-align:middle}
.calc-hero .crumb + .pill{display:flex;width:max-content;max-width:100%;margin-top:18px!important;margin-left:0!important;margin-bottom:0;white-space:normal;overflow-wrap:anywhere;vertical-align:top;color:#10211d;font-size:12px;line-height:1.1}
.calc-hero .pill{color:#10211d;font-size:12px;line-height:1.1}
@media(min-width:621px){.calc-hero .crumb + .pill{margin-top:18px!important}}
@media(max-width:620px){.calc-hero .crumb + .pill{margin-top:14px!important}}