/* PayMrBill — clean, fast, professional. No frameworks. */
:root{
  --ink:#1a2332;
  --ink-soft:#4b5563;
  --muted:#6b7280;
  --line:#e5e7eb;
  --bg:#ffffff;
  --bg-soft:#f6f8fb;
  --brand:#1d4ed8;
  --brand-dark:#1e40af;
  --brand-soft:#eff4ff;
  --green:#15803d;
  --green-soft:#f0fdf4;
  --radius:10px;
  --shadow:0 1px 3px rgba(16,24,40,.08),0 4px 12px rgba(16,24,40,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
img{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:820px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:1.35rem;color:#fff;letter-spacing:-.02em}
.logo span{color:#7fb0ff}
.main-nav{display:flex;gap:4px;align-items:center}
.main-nav a{color:#dbe4f3;padding:8px 12px;border-radius:8px;font-size:.95rem}
.main-nav a:hover{background:rgba(255,255,255,.1);color:#fff;text-decoration:none}
.main-nav .cta{background:var(--brand);color:#fff;font-weight:600}
.main-nav .cta:hover{background:var(--brand-dark)}
@media(max-width:760px){
  .main-nav a{padding:8px 8px;font-size:.88rem}
  .main-nav a.hide-sm{display:none}
}

/* Hero */
.hero{background:linear-gradient(180deg,#101c33 0%,#1a2b4d 100%);color:#fff;padding:64px 0 56px;text-align:center}
.hero h1{font-size:2.4rem;line-height:1.2;margin:0 0 14px;letter-spacing:-.02em}
.hero p.lead{font-size:1.15rem;color:#c7d6f2;max-width:640px;margin:0 auto 26px}
.hero .btn-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:700;padding:13px 26px;border-radius:var(--radius);border:0;cursor:pointer;font-size:1rem}
.btn:hover{background:var(--brand-dark);text-decoration:none;color:#fff}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid #5b7195}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#8aa4cf}
.btn-outline{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-outline:hover{background:var(--brand-soft)}
.btn-sm{padding:8px 14px;font-size:.88rem}
@media(max-width:600px){.hero h1{font-size:1.8rem}}

/* Trust badges */
.trust{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:18px 0}
.trust .wrap{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:.88rem;font-weight:600;color:var(--ink-soft);box-shadow:var(--shadow)}
.badge .dot{width:9px;height:9px;border-radius:50%;background:var(--green);flex:none}
.badge.privacy{border-color:#bbf7d0;background:var(--green-soft);color:var(--green)}

/* Tool layout */
.tool-section{padding:44px 0}
.tool-section h2{margin-top:0}
.tool-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:28px;align-items:start}
@media(max-width:960px){.tool-grid{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.panel-head{padding:16px 20px;border-bottom:1px solid var(--line);font-weight:700;font-size:1.05rem;display:flex;justify-content:space-between;align-items:center}
.panel-body{padding:20px}
fieldset{border:0;padding:0;margin:0 0 22px}
fieldset:last-child{margin-bottom:0}
legend{font-weight:700;font-size:.95rem;padding:0;margin-bottom:12px;color:var(--ink)}
.field{margin-bottom:12px}
.field label{display:block;font-size:.82rem;font-weight:600;color:var(--ink-soft);margin-bottom:5px}
.field input[type=text],.field input[type=email],.field input[type=date],.field input[type=number],.field select,.field textarea{
  width:100%;padding:9px 12px;border:1px solid #cbd5e1;border-radius:8px;font-size:.95rem;font-family:inherit;color:var(--ink);background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--brand);outline-offset:0;border-color:var(--brand)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field-row3{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px}
@media(max-width:520px){.field-row,.field-row3{grid-template-columns:1fr}}
.hint{font-size:.8rem;color:var(--muted);margin-top:4px}
.item-row{display:grid;grid-template-columns:1fr 70px 90px 90px 34px;gap:8px;margin-bottom:8px;align-items:center}
.item-head{display:grid;grid-template-columns:1fr 70px 90px 90px 34px;gap:8px;font-size:.75rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
@media(max-width:520px){
  .item-row,.item-head{grid-template-columns:1fr 60px 80px 30px}
  .item-row .rate-col,.item-head .rate-col{display:none}
}
.icon-btn{background:#fff;border:1px solid var(--line);border-radius:8px;width:32px;height:32px;cursor:pointer;color:#b91c1c;font-size:1rem;line-height:1}
.icon-btn:hover{background:#fef2f2}
.item-row input,.tax-row input{width:100%;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;font-size:.92rem;font-family:inherit;color:var(--ink)}
.item-row input:focus,.tax-row input:focus{outline:2px solid var(--brand);border-color:var(--brand)}
#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;display:none;z-index:100;font-size:.92rem;box-shadow:var(--shadow);max-width:90vw;text-align:center}
.add-row{background:var(--bg-soft);border:1px dashed #b6c2d6;color:var(--brand);border-radius:8px;padding:9px;width:100%;cursor:pointer;font-weight:600;font-size:.9rem}
.add-row:hover{background:var(--brand-soft)}
.tax-row{display:grid;grid-template-columns:1fr 90px 34px;gap:8px;margin-bottom:8px;align-items:center}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.logo-preview{max-height:64px;margin-top:8px;border:1px solid var(--line);border-radius:6px;padding:4px;background:#fff}

/* Invoice preview (the document) */
.preview-sticky{position:sticky;top:76px}
@media(max-width:960px){.preview-sticky{position:static}}
.invoice-doc{background:#fff;border:1px solid var(--line);border-radius:6px;padding:40px 36px;box-shadow:var(--shadow);font-size:.92rem;color:#111}
.inv-top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:28px}
.inv-top h2{margin:0;font-size:1.9rem;letter-spacing:.06em;color:var(--ink)}
.inv-logo{max-height:70px;max-width:200px}
.inv-meta{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:26px}
.inv-meta h4{margin:0 0 6px;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.inv-meta p{margin:0;white-space:pre-line}
.inv-dates{text-align:right}
.inv-dates p{margin:3px 0}
.inv-table{width:100%;border-collapse:collapse;margin-bottom:20px}
.inv-table th{background:#f1f5f9;text-align:left;padding:9px 10px;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);border-bottom:2px solid var(--line)}
.inv-table td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
.inv-table .r{text-align:right}
.inv-totals{margin-left:auto;width:260px;max-width:100%}
.inv-totals .trow{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px solid var(--line)}
.inv-totals .trow.grand{font-weight:800;font-size:1.12rem;border-bottom:0;border-top:2px solid var(--ink);padding-top:10px;margin-top:4px}
.inv-notes{margin-top:26px;border-top:1px solid var(--line);padding-top:16px;white-space:pre-line}
.inv-notes h4{margin:0 0 6px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.inv-foot{margin-top:30px;text-align:center;color:var(--muted);font-size:.78rem}
@media(max-width:520px){.invoice-doc{padding:24px 18px}.inv-meta{grid-template-columns:1fr}.inv-dates{text-align:left}}

/* Sections */
.section{padding:56px 0}
.section.alt{background:var(--bg-soft)}
.section h2{font-size:1.7rem;letter-spacing:-.01em;margin:0 0 8px;text-align:center}
.section .sub{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 32px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:860px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin:0 0 8px;font-size:1.05rem}
.card p{margin:0;color:var(--ink-soft);font-size:.93rem}
.card .ico{font-size:1.6rem}

/* FAQ */
.faq{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;background:#fff;overflow:hidden}
.faq-item summary{padding:16px 20px;font-weight:700;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--bg-soft)}
.faq-item .faq-a{padding:0 20px 18px;color:var(--ink-soft);font-size:.95rem}
.faq-item .faq-a p{margin:0 0 10px}
.faq-item .faq-a p:last-child{margin-bottom:0}

/* Prose (guides, legal) */
.prose{padding:44px 0}
.prose h1{font-size:2rem;letter-spacing:-.02em;margin:0 0 10px}
.prose .meta{color:var(--muted);font-size:.9rem;margin-bottom:28px}
.prose h2{font-size:1.35rem;margin:34px 0 10px}
.prose h3{font-size:1.1rem;margin:26px 0 8px}
.prose p,.prose li{color:#2b3444}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin-bottom:8px}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.93rem}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.prose th{background:#f1f5f9}
.callout{background:var(--brand-soft);border-left:4px solid var(--brand);padding:16px 20px;border-radius:0 8px 8px 0;margin:24px 0}
.callout.green{background:var(--green-soft);border-color:var(--green)}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:18px}
.guide-list{display:grid;gap:16px;margin-top:8px}
.guide-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);color:inherit}
.guide-card:hover{text-decoration:none;border-color:var(--brand)}
.guide-card h3{margin:0 0 6px;color:var(--brand)}
.guide-card p{margin:0;color:var(--ink-soft);font-size:.93rem}

/* Footer */
.site-footer{background:var(--ink);color:#aeb9cf;padding:44px 0 26px;margin-top:20px;font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h4{color:#fff;margin:0 0 12px;font-size:.95rem}
.foot-grid a{display:block;color:#aeb9cf;margin-bottom:8px}
.foot-grid a:hover{color:#fff}
.foot-bottom{border-top:1px solid #2c3a55;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.82rem}

/* Print: only the invoice */
@media print{
  body *{visibility:hidden}
  #invoice-doc,#invoice-doc *{visibility:visible}
  #invoice-doc{position:absolute;left:0;top:0;width:100%;box-shadow:none;border:0;margin:0;padding:0}
  .site-header,.hero,.trust,.no-print,.site-footer,.tool-form-col{display:none!important}
  .tool-grid{display:block}
}
.all-guides-h{margin:26px 0 10px;font-size:1.15rem}
.all-guides{columns:2;column-gap:28px;list-style:none;padding:0;margin:0}
.all-guides li{margin:0 0 8px;break-inside:avoid}
.all-guides a{color:var(--brand)}
@media(max-width:640px){.all-guides{columns:1}}

/* ---- Tools: calculators ---- */
.tool-links{font-size:.95rem;color:var(--ink-soft);margin:-8px 0 22px}
.tool-links a{color:var(--brand)}
.rate-presets{display:flex;gap:8px;flex-wrap:wrap}
.rate-presets button{background:#fff;border:1.5px solid var(--line);border-radius:var(--radius);padding:9px 18px;font-weight:700;cursor:pointer;font-size:.95rem;color:var(--ink)}
.rate-presets button:hover{border-color:var(--brand)}
.rate-presets button.active{background:var(--brand);border-color:var(--brand);color:#fff}
.seg{display:flex;border:1.5px solid var(--line);border-radius:var(--radius);overflow:hidden}
.seg button{flex:1;background:#fff;border:0;padding:10px;font-weight:700;cursor:pointer;font-size:.92rem;color:var(--ink-soft)}
.seg button.active{background:var(--brand);color:#fff}
.calc-result{margin-top:18px;border-top:1px solid var(--line);padding-top:6px}
.calc-row{display:flex;justify-content:space-between;align-items:center;padding:10px 2px;border-bottom:1px dashed var(--line);font-size:1rem}
.calc-row span{color:var(--ink-soft)}
.calc-row.total{border-bottom:0;font-size:1.25rem}
.calc-row.total strong{color:var(--brand)}

/* ---- Daily question ---- */
.dq-q{font-size:1.15rem;font-weight:700;margin:0 0 16px}
.dq-opt{display:block;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:var(--radius);padding:12px 16px;margin:0 0 10px;cursor:pointer;font-size:1rem;color:var(--ink)}
.dq-opt:hover:not(:disabled){border-color:var(--brand);background:var(--brand-soft)}
.dq-opt:disabled{cursor:default}
.dq-opt.correct{border-color:var(--green);background:var(--green-soft)}
.dq-opt.wrong{border-color:#dc2626;background:#fef2f2}
.dq-letter{display:inline-block;min-width:26px;font-weight:800;color:var(--brand)}
.dq-opt.correct .dq-letter{color:var(--green)}
.dq-why .callout{margin:14px 0 0}