/* SolveCalcs: warm paper, plum ink, terracotta accents, serif headings. Colours come from theme variables set in <head>. */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);background:var(--bg);color:var(--ink);line-height:1.7;font-size:18px;display:flex;flex-direction:column;min-height:100vh;overflow-x:hidden}
main{flex:1}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--brand2)}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.18;margin:0 0 .6em;color:var(--plum);letter-spacing:-.012em}
h1{font-size:clamp(2.1rem,5vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.55rem,3vw,2.15rem);font-weight:700}
h3{font-size:1.22rem;font-weight:700}
p{margin:0 0 1.05em}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 22px}
.page-narrow{max-width:800px}
.center{text-align:center}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:8px 14px;z-index:9999}
.skip-link:focus{left:8px;top:8px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;padding:13px 26px;border-radius:99px;font-weight:800;text-decoration:none;cursor:pointer;font-family:inherit;font-size:1rem;box-shadow:0 6px 16px rgba(194,65,12,.22);transition:transform .14s,background .15s,box-shadow .15s}
.btn:hover{background:var(--brand2);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(194,65,12,.28)}
.btn-ghost{background:var(--soft);color:var(--plum);box-shadow:none}
.btn-ghost:hover{background:#efdfc3;color:var(--plum);box-shadow:none}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,246,236,.94);backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--plum);font-family:var(--font-head);font-weight:800;font-size:1.45rem;letter-spacing:-.02em}
.logo b{color:var(--brand)}
.logo-mark{display:inline-flex;width:40px;height:40px;border-radius:50% 50% 50% 12px;background:var(--brand);color:#fff;align-items:center;justify-content:center;font-size:1.05rem}
.main-nav{display:flex;align-items:center;gap:6px;background:var(--surface);padding:5px;border-radius:99px;box-shadow:0 2px 10px rgba(59,42,77,.07)}
.nav-link{padding:8px 18px;border-radius:99px;text-decoration:none;color:var(--ink);font-weight:700;font-size:.95rem}
.nav-link:hover{background:var(--soft);color:var(--brand2)}
.nav-link i{font-size:.65rem;margin-left:5px}
.nav-drop{position:relative}
.nav-menu{display:none;position:absolute;top:100%;left:0;margin-top:8px;min-width:280px;background:var(--surface);border-radius:20px;box-shadow:0 22px 50px rgba(59,42,77,.18);padding:10px;z-index:60}
.nav-menu:before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
.nav-drop:hover .nav-menu,.nav-drop:focus-within .nav-menu{display:block}
.nav-menu a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;text-decoration:none;color:var(--ink);font-size:.95rem;font-weight:600}
.nav-menu a i{width:30px;height:30px;border-radius:50%;background:var(--soft);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:.8rem}
.nav-menu a:hover{background:var(--soft)}
.menu-btn{display:none;background:var(--surface);border:0;font-size:1.25rem;color:var(--plum);cursor:pointer;padding:10px 14px;border-radius:99px}
.mobile-nav{display:none;background:var(--surface);padding:8px 22px 18px;box-shadow:0 14px 24px rgba(59,42,77,.08)}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:11px 0;color:var(--ink);text-decoration:none;font-weight:700;border-bottom:1px dashed var(--line)}
.mobile-nav a.sub{font-weight:500;padding-left:14px;font-size:.96rem}
/* hero: left aligned on graph paper */
.hero{position:relative;padding:62px 0 30px;background-color:var(--bg);background-image:linear-gradient(rgba(194,65,12,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(194,65,12,.07) 1px,transparent 1px);background-size:34px 34px;-webkit-mask-image:none}
.hero:after{content:"";position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(180deg,rgba(251,246,236,0),var(--bg))}
.hero-inner{position:relative;z-index:1;max-width:1140px;text-align:left}
.eyebrow{display:inline-block;background:var(--plum);color:#f9e9cf;font-weight:700;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;padding:6px 15px;border-radius:99px;margin-bottom:20px}
.hero h1{max-width:820px}
.hero h1 em{font-style:italic;color:var(--brand);font-weight:700}
.hero-sub{font-size:1.25rem;color:var(--muted);max-width:640px;margin:0 0 26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.hero-points{list-style:none;padding:0;margin:0;display:flex;gap:10px 14px;flex-wrap:wrap;font-size:.94rem}
.hero-points li{background:var(--surface);padding:7px 15px;border-radius:99px;box-shadow:0 2px 8px rgba(59,42,77,.06);font-weight:600}
.hero-points i{color:var(--accent);margin-right:7px}
section.wrap{padding-top:40px;padding-bottom:40px}
.section-head{margin-bottom:26px}
.section-head p{color:var(--muted);margin:0;max-width:680px}
.section-head.center p{margin:0 auto}
.calc-section{padding-top:24px}
.calc-col{width:100%;max-width:430px;margin:0 auto}
/* cards: soft, no outlines */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:18px}
.tool-card{display:flex;gap:15px;align-items:flex-start;background:var(--surface);border-radius:22px;padding:20px;text-decoration:none;color:var(--ink);box-shadow:0 3px 14px rgba(59,42,77,.07);transition:box-shadow .16s,transform .16s}
.tool-card:hover{box-shadow:0 16px 34px rgba(59,42,77,.14);transform:translateY(-3px);color:var(--ink)}
.tool-ico{flex:0 0 48px;height:48px;border-radius:50%;background:var(--soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:1.15rem}
.tool-card:nth-child(3n+2) .tool-ico{background:#e1efe9;color:var(--accent)}
.tool-card:nth-child(3n) .tool-ico{background:#e9e1f1;color:var(--plum)}
.tool-body{display:flex;flex-direction:column;gap:3px}
.tool-body strong{font-size:1.06rem;font-family:var(--font-head);font-weight:700;color:var(--plum)}
.tool-body span{color:var(--muted);font-size:.93rem;line-height:1.5}
/* prose */
.block-text{max-width:800px}
.block-text h2{margin-bottom:.7em}
.prose{max-width:800px}
.prose h2{margin-top:1.7em}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.15em}
.prose li{margin-bottom:.5em}
.prose table,.block-text table{width:100%;border-collapse:separate;border-spacing:0;margin:1.3em 0;font-size:.97rem;display:block;overflow-x:auto;background:var(--surface);border-radius:16px;box-shadow:0 2px 12px rgba(59,42,77,.06)}
.prose th,.prose td,.block-text th,.block-text td{border-bottom:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.prose th,.block-text th{background:var(--soft);font-family:var(--font-head);color:var(--plum)}
.prose tr:last-child td,.block-text tr:last-child td{border-bottom:0}
.prose blockquote,.block-text blockquote{margin:1.3em 0;padding:16px 20px;background:var(--soft);border-radius:18px;color:var(--plum)}
.prose code{background:var(--soft);padding:2px 7px;border-radius:7px;font-size:.92em}
.note-box{background:var(--soft);border-radius:18px;padding:18px 20px;margin:1.3em 0}
.lead{font-size:1.2rem;color:var(--muted);max-width:760px}
.hub-prose{margin-top:38px}
/* steps: big serif numerals */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.step{background:var(--plum);color:#f3e6d0;border-radius:24px;padding:26px 22px}
.step-n{display:block;font-family:var(--font-head);font-weight:800;font-size:3rem;line-height:1;color:#f0a35e;margin-bottom:10px}
.step h3{color:#fff;margin-bottom:.35em}
.step p{margin:0;color:#d9cbe4;font-size:.97rem}
/* guides */
.guide-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:18px}
.guide-list.compact{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.guide-card{display:flex;flex-direction:column;gap:9px;background:var(--surface);border-radius:22px;padding:22px;text-decoration:none;color:var(--ink);box-shadow:0 3px 14px rgba(59,42,77,.07);transition:box-shadow .16s,transform .16s}
.guide-card:hover{box-shadow:0 16px 34px rgba(59,42,77,.14);transform:translateY(-3px);color:var(--ink)}
.guide-card strong{font-family:var(--font-head);font-size:1.18rem;line-height:1.3;color:var(--plum)}
.g-desc{color:var(--muted);font-size:.96rem;line-height:1.55}
.g-meta,.byline{color:var(--muted);font-size:.88rem}
.tag{align-self:flex-start;display:inline-block;background:#e1efe9;color:#236354;font-weight:800;font-size:.74rem;padding:4px 12px;border-radius:99px;text-transform:uppercase;letter-spacing:.06em}
.more-link{margin-top:20px;font-weight:700}
.more-h{margin-top:2em}
.cta-box{background:var(--soft);border-radius:24px;padding:24px 26px;margin:2.2em 0}
.cta-box p{margin:.5em 0}
/* faq */
.faq-list{display:flex;flex-direction:column;gap:11px}
.faq-item{background:var(--surface);border-radius:18px;overflow:hidden;box-shadow:0 2px 10px rgba(59,42,77,.06)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:14px;align-items:center;padding:17px 22px;font-weight:700;color:var(--plum)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--brand);font-size:.85rem;flex:0 0 auto}
.faq-item[open] summary{color:var(--brand2)}
.faq-body{padding:0 22px 18px;color:var(--muted)}
.faq-body p:last-child{margin-bottom:0}
/* crumbs */
.crumbs{font-size:.88rem;color:var(--muted);margin:24px 0 12px}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 8px}
/* tool page */
.tool-box{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:24px;align-items:start;margin:24px 0 10px}
.tool-box>*{min-width:0}
.tool-form{background:var(--surface);border-radius:26px;padding:24px;box-shadow:0 10px 30px rgba(59,42,77,.09)}
.field{margin-bottom:15px}
.field label{display:block;font-weight:700;font-size:.92rem;margin-bottom:6px;color:var(--plum)}
.field input,.field select,.field textarea{width:100%;padding:12px 15px;border:2px solid transparent;border-radius:14px;font:inherit;background:var(--soft);color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);background:#fff}
.field small{display:block;color:var(--muted);font-size:.8rem;margin-top:5px}
.calc-go{width:100%;margin-top:6px}
.tool-out{background:var(--surface);border-radius:26px;padding:24px;min-height:190px;box-shadow:0 10px 30px rgba(59,42,77,.09);overflow:hidden}
.out-empty{color:var(--muted)}
.out-error{background:#fdeceb;color:#9b2c1f;padding:13px 16px;border-radius:14px}
.out-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:11px}
.out-card{background:var(--soft);border-radius:16px;padding:13px 16px}
.out-card span{display:block;font-size:.8rem;color:var(--muted)}
.out-card strong{font-size:1.15rem;word-break:break-word;font-family:var(--font-head);color:var(--plum)}
.out-card.big{grid-column:1/-1;background:var(--plum)}
.out-card.big span{color:#d9cbe4}
.out-card.big strong{font-size:1.9rem;color:#f6b878}
.out-steps{margin-top:18px}
.out-steps h3{font-size:1.05rem}
.out-steps ol{padding-left:1.25em;margin:0}
.out-steps li{margin-bottom:7px}
.out-table-wrap{overflow-x:auto;margin-top:14px;max-height:340px;overflow-y:auto}
.out-table{width:100%;min-width:420px;border-collapse:collapse;font-size:.88rem}
.out-table th,.out-table td{padding:8px 11px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.out-table th:first-child,.out-table td:first-child{text-align:left}
.out-table thead th{position:sticky;top:0;background:var(--soft)}
.out-note{color:var(--muted);font-size:.88rem;margin-top:12px}
.tool-prose{margin-top:30px}
/* footer */
.site-footer{background:var(--footer);color:#cdbfd9;margin-top:60px;padding:54px 0 22px;border-radius:44px 44px 0 0}
.site-footer a{color:#efe3f7;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}
.site-footer h4{color:#f6b878;font-size:1rem;margin-bottom:.9em}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.55em;font-size:.94rem}
.footer-brand p{font-size:.94rem;color:#b8a8c8;margin-top:14px;max-width:330px}
.site-footer .logo{color:#fff}
.footer-base{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.13);margin-top:32px;padding-top:20px;font-size:.85rem;color:#a393b5}
@media(max-width:860px){
  .main-nav{display:none}.menu-btn{display:block}
  .tool-box{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  body{font-size:17px}
  .hero{padding:40px 0 22px}
  .footer-grid{grid-template-columns:1fr}
  .wrap{padding:0 16px}
  .site-footer{border-radius:30px 30px 0 0}
}