:root{
  --content-width:1180px;--space:8px;--radius:12px;
  --bg:#fbf7f1;--surface:#fffdfa;--surface-muted:#f4eee6;--ink:#17233c;--muted:#647087;
  --border:#ddd6cc;--border-strong:#c9bfb2;--accent:#2563eb;--accent-hover:#1d4ed8;
  --copper:#b66a32;--copper-soft:#f6e7d8;--success:#15803d;--danger:#b91c1c;
  --mono:'JetBrains Mono','Geist Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:'Inter','Geist',ui-sans-serif,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --shadow:0 1px 2px rgba(23,35,60,.04),0 10px 30px -24px rgba(23,35,60,.34);
}
@media(prefers-color-scheme:dark){:root{--bg:#0d1422;--surface:#121d2f;--surface-muted:#18243a;--ink:#f4efe7;--muted:#aab3c2;--border:#2b3952;--border-strong:#40506c;--accent:#60a5fa;--accent-hover:#93c5fd;--copper:#e1a06f;--copper-soft:#3b291f;--success:#4ade80;--danger:#f87171;--shadow:0 1px 2px rgba(0,0,0,.24),0 16px 42px -28px rgba(0,0,0,.8)}}
:root[data-theme="light"]{color-scheme:light;--bg:#fbf7f1;--surface:#fffdfa;--surface-muted:#f4eee6;--ink:#17233c;--muted:#647087;--border:#ddd6cc;--border-strong:#c9bfb2;--accent:#2563eb;--accent-hover:#1d4ed8;--copper:#b66a32;--copper-soft:#f6e7d8;--success:#15803d;--danger:#b91c1c;--shadow:0 1px 2px rgba(23,35,60,.04),0 10px 30px -24px rgba(23,35,60,.34)}
:root[data-theme="dark"]{color-scheme:dark;--bg:#0d1422;--surface:#121d2f;--surface-muted:#18243a;--ink:#f4efe7;--muted:#aab3c2;--border:#2b3952;--border-strong:#40506c;--accent:#60a5fa;--accent-hover:#93c5fd;--copper:#e1a06f;--copper-soft:#3b291f;--success:#4ade80;--danger:#f87171;--shadow:0 1px 2px rgba(0,0,0,.24),0 16px 42px -28px rgba(0,0,0,.8)}
html{background:var(--bg);color:var(--ink);font-family:var(--sans);scroll-behavior:smooth}
body{background:var(--bg)!important;color:var(--ink)!important;font-family:var(--sans)!important}
.site-masthead{max-width:var(--content-width);margin:0 auto;padding:16px 108px 0 24px;display:flex;align-items:center;min-height:74px}
.site-brand{display:inline-flex;align-items:center;text-decoration:none;min-height:44px;border-radius:8px}.brand-logo{display:block;width:min(350px,100%);height:auto}.site-brand.compact .brand-logo{width:min(310px,100%)}
.wrap{max-width:var(--content-width)!important;padding-left:24px!important;padding-right:24px!important}
h1,h2,h3{color:var(--ink);text-wrap:balance}h1{letter-spacing:-.04em!important}p{color:inherit}
.card,.nav-card,.tool{background:var(--surface)!important;border-color:var(--border)!important;border-radius:var(--radius)!important;box-shadow:var(--shadow)!important}
.nav-card{min-height:132px;transition:transform 160ms ease,border-color 160ms ease,box-shadow 160ms ease!important}
.nav-card:hover{transform:translateY(-1px)!important;border-color:var(--border-strong)!important}
.nav-card.featured{background:linear-gradient(180deg,var(--surface),var(--copper-soft))!important;border-left:3px solid var(--copper)!important}
.nav-card.featured .name{color:var(--ink)!important}.nav-card.featured .arrow{color:var(--copper)!important}
input,select,textarea,button,a.primary{min-height:44px;border-radius:10px!important;font-family:var(--sans)!important}
input,select,textarea{background:var(--surface)!important;color:var(--ink)!important;border-color:var(--border)!important}
button,.primary{transition:background-color 160ms ease,border-color 160ms ease,transform 160ms ease,box-shadow 160ms ease!important}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent)!important;outline-offset:2px!important}
.primary,#calc-btn,#run-btn{background:var(--accent)!important;color:#fff!important;min-height:44px;padding:11px 18px!important}
.primary:hover,#calc-btn:hover,#run-btn:hover{background:var(--accent-hover)!important}
.result,.net,.row-line{font-variant-numeric:tabular-nums}.result{font-family:var(--mono)!important;background:linear-gradient(135deg,var(--surface-muted),var(--surface))!important;border:1px solid var(--border)!important;border-left:3px solid var(--accent)!important;padding:18px!important;line-height:1.75!important;box-shadow:inset 0 1px 0 color-mix(in srgb,var(--surface) 75%,transparent)}
.field label{letter-spacing:-.005em}.field input,.field select,.field textarea{transition:border-color 160ms ease,box-shadow 160ms ease,background-color 160ms ease}.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--border-strong)!important}
details{margin-top:16px;border:1px solid var(--border);border-radius:10px;background:var(--surface-muted);padding:12px 14px}summary{cursor:pointer;color:var(--ink);font-weight:700;min-height:28px}
.badge{border-radius:999px!important}.badge.featured,.new-badge{display:inline-flex;align-items:center;width:max-content;padding:3px 8px;border:1px solid;color:var(--copper)!important;background:var(--copper-soft)!important;border-color:color-mix(in srgb,var(--copper) 35%,var(--border))!important;border-radius:999px;font-size:.68rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.ad-slot{display:none!important}
.tool-icon svg,.ico svg{stroke-width:1.75!important}
.tool-icon{display:flex;flex:0 0 auto;color:var(--accent);padding-top:1px}.tool-icon svg{width:20px;height:20px}.featured .tool-icon{color:var(--copper)}
.tool-context{display:flex;align-items:center;gap:8px;margin:0 0 14px;color:var(--muted);font-size:.82rem}.tool-context a{color:var(--accent);text-decoration:none;font-weight:700}.tool-context .separator{color:var(--border-strong)}.tool-context .category-pill{display:inline-flex;align-items:center;min-height:28px;padding:3px 9px;border:1px solid var(--border);border-radius:999px;background:var(--surface-muted);color:var(--ink);font-weight:700}
.trust-bar{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.trust-bar span{display:inline-flex;align-items:center;gap:7px;min-height:30px;padding:4px 10px;border:1px solid var(--border);border-radius:999px;background:var(--surface-muted);color:var(--muted);font-size:.78rem;font-weight:700}.trust-bar span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--success)}.footer-nav{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:8px}.footer-nav a{color:var(--accent);text-decoration:none;font-weight:650}footer{margin-top:34px;color:var(--muted);font-size:.84rem}
.calculator-workspace{display:grid;grid-template-columns:minmax(0,720px) minmax(240px,1fr);gap:20px;align-items:start;margin-top:20px}.calculator-pad-card{padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--surface);box-shadow:var(--shadow)}.calc-toolbar,.side-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.segmented{display:inline-flex;padding:4px;border:1px solid var(--border);border-radius:12px;background:var(--surface-muted)}.segmented button{min-height:36px;padding:6px 13px;border:0!important;background:transparent!important;color:var(--muted)!important;font-weight:750}.segmented button.active{background:var(--surface)!important;color:var(--ink)!important;box-shadow:0 1px 4px rgba(23,35,60,.12)}.angle-button,.quiet-button{min-height:36px!important;padding:6px 11px!important;border:1px solid var(--border)!important;background:var(--surface-muted)!important;color:var(--ink)!important;font-weight:800}.calc-display{position:relative;margin:16px 0;padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--surface-muted);text-align:right}.calc-expression{width:100%;min-height:42px!important;padding:0!important;border:0!important;background:transparent!important;box-shadow:none!important;text-align:right;color:var(--muted)!important}.calc-result{display:block;min-height:58px;text-align:right;font-family:var(--mono);font-size:clamp(2rem,6vw,3.3rem);font-weight:750;line-height:1;overflow-wrap:anywhere}.calc-status{min-height:20px;margin-top:7px;text-align:right;color:var(--muted);font-size:.76rem}.calc-status.error{color:var(--danger)}.memory-indicator{position:absolute;left:16px;top:14px;color:var(--copper);font-family:var(--mono);font-size:.75rem;font-weight:700}.memory-row,.scientific-keys,.basic-keys{display:grid;gap:9px}.memory-row{grid-template-columns:repeat(4,1fr);margin-bottom:10px}.scientific-keys{grid-template-columns:repeat(6,1fr);margin-bottom:10px}.basic-keys{grid-template-columns:repeat(5,1fr)}.memory-row button,.scientific-keys button,.basic-keys button{min-height:52px!important;padding:8px!important;border:1px solid var(--border)!important;background:var(--surface)!important;color:var(--ink)!important;font-family:var(--mono)!important;font-size:1rem;font-weight:700;box-shadow:0 1px 2px rgba(23,35,60,.05);cursor:pointer}.memory-row button:hover,.scientific-keys button:hover,.basic-keys button:hover{border-color:var(--accent)!important;background:var(--surface-muted)!important}.memory-row button{min-height:42px!important;color:var(--muted)!important;font-size:.82rem}.scientific-keys button{background:var(--surface-muted)!important;color:var(--accent)!important;font-size:.85rem}.basic-keys .key-soft{background:var(--surface-muted)!important;color:var(--muted)!important}.basic-keys .key-operator{color:var(--accent)!important;background:color-mix(in srgb,var(--accent) 8%,var(--surface))!important}.basic-keys .key-equals{grid-row:span 2;background:var(--accent)!important;color:#fff!important;border-color:var(--accent)!important}.basic-keys .key-zero{grid-column:span 2}.calculator-side{display:grid;gap:16px}.calculator-side .card{padding:16px}.calculator-side h2{font-size:1rem;margin:0}.quiet-button{min-height:36px!important;padding:4px 7px!important;color:var(--accent)!important}.calc-history{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:7px;max-height:330px;overflow:auto}.history-entry{width:100%;min-height:52px!important;padding:8px 10px!important;border:1px solid var(--border)!important;background:var(--surface-muted)!important;text-align:right;display:grid;gap:2px}.history-entry span{color:var(--muted);font-family:var(--mono);font-size:.75rem;overflow:hidden;text-overflow:ellipsis}.history-entry strong{color:var(--ink);font-family:var(--mono)}.history-empty{padding:16px 5px;color:var(--muted);font-size:.86rem}.calc-guide dl{margin:12px 0;display:grid;gap:6px}.calc-guide dl div{display:flex;justify-content:space-between;gap:12px}.calc-guide dt{font-family:var(--mono);color:var(--ink);font-weight:700}.calc-guide dd{margin:0;color:var(--muted)}.calc-guide p{color:var(--muted);font-size:.84rem}.calculator-method{margin-top:22px;padding:20px}.calculator-method h2{margin-top:0}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.method-grid h3{font-size:.95rem;margin:0 0 5px}.method-grid p{margin:0;color:var(--muted);font-size:.87rem}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.result-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:12px}.secondary-action{min-height:40px!important;padding:8px 12px!important;border:1px solid var(--border)!important;background:var(--surface)!important;color:var(--ink)!important;font-weight:750;cursor:pointer}.secondary-action:hover{border-color:var(--accent)!important;color:var(--accent)!important}.result-status{color:var(--success);font-size:.8rem;font-weight:750}
.commercial-card{margin-top:20px!important;padding:clamp(18px,3vw,26px)!important;border-color:color-mix(in srgb,var(--copper) 35%,var(--border))!important;background:linear-gradient(180deg,var(--surface),color-mix(in srgb,var(--copper) 5%,var(--surface-muted)))!important}.commercial-card h2{margin:6px 0 8px;font-size:1.15rem}.commercial-card p{color:var(--muted);line-height:1.65}.sponsor-label{display:inline-flex;align-items:center;min-height:26px;padding:3px 8px;border:1px solid var(--border);border-radius:999px;color:var(--copper);font-size:.68rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.commercial-cta{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin-top:5px;padding:10px 15px;border-radius:10px;background:var(--accent);color:#fff!important;text-decoration:none;font-weight:800}.commercial-cta:hover{filter:brightness(.95)}.commercial-disclosure{margin:12px 0 0!important;font-size:.78rem!important}.ad-card{min-height:132px;text-align:center}.ad-card .sponsor-label{margin-bottom:12px}.adsbygoogle{min-height:90px}
.methodology{margin-top:22px!important;padding:clamp(20px,4vw,34px)!important}.section-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.section-heading h2,.methodology h2{margin:4px 0 0;font-size:clamp(1.25rem,3vw,1.55rem)}.eyebrow{color:var(--copper);font-size:.72rem;font-weight:850;letter-spacing:.09em;text-transform:uppercase}.reviewed-badge{display:inline-flex;align-items:center;min-height:32px;padding:5px 10px;border:1px solid var(--border);border-radius:999px;background:var(--surface-muted);color:var(--muted);font-size:.76rem;font-weight:750;white-space:nowrap}.methodology .method-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:22px}.methodology h3{margin:0 0 7px;font-size:1rem}.methodology p{color:var(--muted);line-height:1.7}.formula-copy{padding:14px 16px;border-left:3px solid var(--copper);border-radius:0 10px 10px 0;background:var(--surface-muted);color:var(--ink)!important}.assumption-panel{padding:18px;border:1px solid var(--border);border-radius:12px;background:var(--surface-muted)}.assumption-panel ul{margin:10px 0 0;padding-left:20px;color:var(--muted)}.assumption-panel li+li{margin-top:8px}.faq-block,.related-block{margin-top:26px;padding-top:22px;border-top:1px solid var(--border)}.faq-block details{background:var(--surface)!important}.faq-block details p{margin:10px 0 2px}.related-tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}.related-tool{display:flex;justify-content:space-between;align-items:center;gap:10px;min-height:52px;padding:11px 13px;border:1px solid var(--border);border-radius:10px;background:var(--surface-muted);color:var(--ink)!important;text-decoration:none;font-weight:750}.related-tool:hover{border-color:var(--accent);color:var(--accent)!important}.method-note{margin:24px 0 0;padding-top:18px;border-top:1px solid var(--border);font-size:.86rem}
.theme-toggle{position:fixed;z-index:1000;top:16px;right:16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:44px;min-height:44px;padding:8px 12px;border:1px solid var(--border)!important;border-radius:999px!important;background:color-mix(in srgb,var(--surface) 92%,transparent)!important;color:var(--ink)!important;box-shadow:var(--shadow);backdrop-filter:blur(8px);cursor:pointer;font-size:.85rem;font-weight:700}
.theme-toggle:hover{border-color:var(--border-strong)!important;transform:translateY(-1px)}.theme-toggle svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}.theme-toggle .theme-label{white-space:nowrap}
@media(max-width:640px){.site-masthead{padding:10px 68px 0 16px;min-height:62px}.site-brand.compact .brand-logo{width:min(246px,100%)}.wrap{padding-left:16px!important;padding-right:16px!important}.nav-card{min-height:112px}.grid{gap:16px!important}#featured-section .nav-card:nth-child(n+4){display:none}}
@media(max-width:900px){.calculator-workspace{grid-template-columns:1fr}.calculator-side{grid-template-columns:1fr 1fr}.method-grid{grid-template-columns:1fr}}
@media(max-width:720px){.methodology .method-grid,.related-tools{grid-template-columns:1fr}.section-heading{display:grid}.reviewed-badge{width:max-content}}
@media(max-width:640px){.calculator-pad-card{padding:12px;border-radius:14px}.scientific-keys{grid-template-columns:repeat(4,1fr)}.basic-keys{gap:7px}.memory-row button,.scientific-keys button,.basic-keys button{min-height:48px!important}.calculator-side{grid-template-columns:1fr}.calc-result{font-size:2.25rem}.tool-context{padding-right:46px;flex-wrap:wrap}}
@media(max-width:520px){.theme-toggle{top:10px;right:10px;padding:8px}.theme-toggle .theme-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* Phase 1 discovery, category, trust, and feedback pages */
.category-section .category-extra{display:none!important}.category-section.expanded .category-extra,.category-section .category-extra.search-reveal{display:flex!important}
.phase-main{width:min(100% - 32px,var(--content-width));margin:0 auto;padding:28px 0 50px}.phase-crumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:.82rem;margin:0 0 24px}.phase-crumb a{color:var(--accent);font-weight:700;text-decoration:none}.phase-hero{max-width:780px;margin:0 0 30px}.phase-hero h1{font-family:var(--font-display);font-size:clamp(2rem,5vw,3.5rem);line-height:1.03;letter-spacing:-.045em;margin:5px 0 14px;color:var(--ink)}.phase-hero>p:last-child{font-size:1.05rem;color:var(--muted);max-width:700px}.phase-eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--copper)!important;font-size:.75rem!important;font-weight:800}.phase-filter{display:grid;grid-template-columns:1fr auto;gap:8px 16px;align-items:end;padding:18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin-bottom:18px}.phase-filter label{grid-column:1/-1;font-weight:750}.phase-filter input{min-height:46px;border:1px solid var(--border);border-radius:10px;background:var(--field);color:var(--ink);padding:0 13px;font:inherit}.phase-filter p{margin:0;color:var(--muted);font-size:.82rem}.phase-tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.phase-tool-card{display:flex;justify-content:space-between;gap:14px;min-height:150px;padding:19px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:inherit;text-decoration:none;transition:transform .16s,border-color .16s,box-shadow .16s}.phase-tool-card:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow)}.phase-tool-card h2{font-size:1rem;margin:7px 0}.phase-tool-card p{font-size:.82rem;color:var(--muted);line-height:1.45;margin:0}.phase-tool-card>span{color:var(--accent);font-weight:800}.phase-card-badge{display:inline-flex;padding:3px 7px;border-radius:999px;background:color-mix(in srgb,var(--accent) 10%,var(--surface));color:var(--accent);font-size:.67rem;text-transform:uppercase;letter-spacing:.06em;font-weight:800}.phase-empty,.phase-note,.phase-prose,.phase-feedback{margin-top:22px;padding:clamp(20px,4vw,34px);border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.phase-note h2,.phase-prose h2,.phase-feedback h2{font-family:var(--font-display);margin-top:0}.phase-note p,.phase-prose p,.phase-feedback p{color:var(--muted)}.phase-prose{display:grid;gap:24px;max-width:900px}.phase-prose article{border-bottom:1px solid var(--border);padding-bottom:20px}.phase-prose article:last-of-type{border-bottom:0}.phase-prose h2{font-size:1.18rem;margin-bottom:8px}.phase-prose p{margin:0}.phase-reviewed{padding:12px 15px;border-radius:10px;background:color-mix(in srgb,var(--copper) 9%,var(--surface));color:var(--ink)!important}.phase-feedback{max-width:820px}.phase-feedback form{display:grid;gap:8px;margin-top:20px}.phase-feedback label{font-weight:750;margin-top:8px}.phase-feedback input,.phase-feedback select,.phase-feedback textarea{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:10px;background:var(--field);color:var(--ink);font:inherit}.phase-feedback textarea{resize:vertical}.phase-actions{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0}.phase-actions button{min-height:44px;padding:0 16px;border:1px solid var(--accent);border-radius:10px;background:var(--accent);color:#fff;font-weight:800;cursor:pointer}.phase-actions button+button{background:transparent;color:var(--accent)}.phase-footer{width:min(100% - 32px,var(--content-width));margin:0 auto;padding:24px 0 40px;border-top:1px solid var(--border);color:var(--muted);font-size:.82rem}.phase-footer nav{display:flex;gap:14px;flex-wrap:wrap}.phase-footer a{color:var(--accent);font-weight:700;text-decoration:none}
@media(max-width:900px){.phase-tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.phase-tool-grid{grid-template-columns:1fr}.phase-filter{grid-template-columns:1fr}.phase-main{width:min(100% - 24px,var(--content-width));padding-top:20px}.phase-tool-card{min-height:0}.phase-footer{width:min(100% - 24px,var(--content-width))}}