/* ============================================================
   Billing Buddy — billingbuddy.com
   Brand: Blue #4862B7 · Teal #49B6D5 · Coral #F14973 · Navy #1D3E5B · Ink #25252D
   Type: Poppins
   Pillar color system:
     Billing & Collections .......... teal
     Expense Management ............. coral
     Data Transformation ............ blue
     Customized Billing Solutions ... navy
   ============================================================ */

:root {
  --blue:  #4862B7;
  --teal:  #49B6D5;
  --coral: #F14973;
  --navy:  #1D3E5B;
  --ink:   #25252D;
  --paper: #F7F9FC;
  --white: #FFFFFF;
  --line:  #E3E9F2;
  --muted: #5B6B7E;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(29, 62, 91, 0.10);
  --maxw: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; color: var(--navy); }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p  { color: var(--muted); }
.lead { font-size: 1.12rem; color: var(--muted); max-width: 62ch; }

/* ---------- Header ---------- */
.topbar {
  background: var(--navy);
  color: #cfe3f2;
  font-size: 0.82rem;
  padding: 6px 0;
}
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar a { color: #fff; font-weight: 600; }

header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.nav .logo img { height: 46px; width: auto; }
.nav ul { display: flex; gap: 26px; list-style: none; align-items: center; }
.nav ul a { color: var(--navy); font-weight: 500; font-size: 0.95rem; padding: 6px 2px; border-bottom: 2px solid transparent; }
.nav ul a:hover, .nav ul a[aria-current="page"] { border-bottom-color: var(--teal); }
.btn {
  display: inline-block; font-weight: 600; border-radius: 999px;
  padding: 12px 26px; border: 2px solid transparent; cursor: pointer;
  font-family: inherit; font-size: 0.98rem; text-align: center;
}
.btn-coral { background: var(--coral); color: #fff; }
.btn-coral:hover { background: #d93a63; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: #16324a; }
.btn-ghost { border-color: var(--navy); color: var(--navy); background: transparent; }
.btn-ghost:hover { background: var(--navy); color: #fff; }
.nav .btn { padding: 10px 22px; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 26px; height: 3px; background: var(--navy); margin: 5px 0; border-radius: 2px; }

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav ul {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; flex-direction: column; padding: 18px 24px 24px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .nav ul.open { display: flex; align-items: flex-start; }
}

/* ---------- Hero ---------- */
.hero { background: linear-gradient(180deg, var(--paper) 0%, #ffffff 100%); overflow: hidden; }
.hero .wrap {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px;
  align-items: center; padding-top: 72px; padding-bottom: 72px;
}
.hero h1 { color: var(--blue); }
.hero h1 em { font-style: normal; color: var(--navy); }
.hero .lead { margin: 18px 0 28px; }
.hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .art { position: relative; }
.hero .art .caption { text-align: center; font-weight: 600; color: var(--navy); margin-top: 14px; font-size: 0.95rem; }
.doodle { position: absolute; z-index: 0; opacity: 0.9; }
@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 44px; }
}

/* ---------- Sections ---------- */
section.band { padding: 72px 0; }
section.band.alt { background: var(--paper); }
.section-head { max-width: 68ch; margin-bottom: 40px; }
.section-head p { margin-top: 10px; }

/* ---------- Pillar cards (mirrors the data-sheet layout) ---------- */
.pillars { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
@media (max-width: 820px) { .pillars { grid-template-columns: 1fr; } }

.pillar {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.pillar .tab {
  color: #fff; font-weight: 600; font-size: 0.8rem; letter-spacing: 0.06em;
  padding: 10px 22px;
}
.pillar.teal  .tab { background: var(--teal); }
.pillar.coral .tab { background: var(--coral); }
.pillar.blue  .tab { background: var(--blue); }
.pillar.navy  .tab { background: var(--navy); }
.pillar .body { padding: 24px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.pillar h3 { font-size: 1.35rem; margin-bottom: 12px; }
.pillar ul { list-style: none; margin: 0 0 18px; }
.pillar ul li { padding-left: 22px; position: relative; margin: 7px 0; color: var(--muted); font-size: 0.95rem; }
.pillar ul li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 8px; height: 8px; border-radius: 50%;
}
.pillar.teal  ul li::before { background: var(--teal); }
.pillar.coral ul li::before { background: var(--coral); }
.pillar.blue  ul li::before { background: var(--blue); }
.pillar.navy  ul li::before { background: var(--navy); }
.pillar .more { margin-top: auto; font-weight: 600; }

/* ---------- Step flow (real sequences only) ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; margin-top: 8px; }
.flow::before {
  content: ""; position: absolute; top: 26px; left: 10%; right: 10%;
  height: 3px; background: var(--line);
}
.flow .step { text-align: center; position: relative; padding: 0 10px; }
.flow .step .dot {
  width: 52px; height: 52px; border-radius: 50%; margin: 0 auto 12px;
  background: #fff; border: 3px solid var(--blue); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; position: relative; z-index: 1;
}
.flow .step h4 { font-size: 1rem; margin-bottom: 4px; }
.flow .step p { font-size: 0.85rem; }
.flow.teal .step .dot { border-color: var(--teal); color: var(--teal); }
.flow.coral .step .dot { border-color: var(--coral); color: var(--coral); }
.flow.navy .step .dot { border-color: var(--navy); color: var(--navy); }
@media (max-width: 820px) {
  .flow { grid-template-columns: 1fr; gap: 18px; }
  .flow::before { display: none; }
  .flow .step { display: grid; grid-template-columns: 52px 1fr; text-align: left; gap: 14px; align-items: start; }
  .flow .step .dot { margin: 0; }
}

/* ---------- Support tiers ---------- */
.tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 820px) { .tiers { grid-template-columns: 1fr; } }
.tier {
  background: #fff; border-top: 6px solid var(--blue); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 26px;
}
.tier:nth-child(2) { border-top-color: var(--teal); }
.tier:nth-child(3) { border-top-color: var(--coral); }
.tier .opt { font-size: 0.78rem; font-weight: 700; color: var(--muted); letter-spacing: 0.08em; }
.tier h3 { margin: 6px 0 10px; }
.tier p { font-size: 0.95rem; }

/* ---------- Case studies ---------- */
.case {
  background: #fff; border: 1px solid var(--line); border-left: 8px solid var(--blue);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 30px 32px; margin-bottom: 28px;
  display: grid; grid-template-columns: 1fr 260px; gap: 32px;
}
.case.teal { border-left-color: var(--teal); }
.case.coral { border-left-color: var(--coral); }
.case.navy { border-left-color: var(--navy); }
.case h3 { margin-bottom: 4px; }
.case .kind { font-size: 0.85rem; font-weight: 600; color: var(--muted); margin-bottom: 16px; }
.case dl div { margin-bottom: 14px; }
.case dt { font-weight: 700; color: var(--navy); font-size: 0.95rem; }
.case dd { color: var(--muted); font-size: 0.97rem; }
.case .stats { display: flex; flex-direction: column; gap: 14px; justify-content: center; }
.stat { background: var(--paper); border-radius: 10px; padding: 14px 16px; text-align: center; }
.stat .big { font-weight: 700; color: var(--navy); font-size: 1.15rem; }
.stat .small { font-size: 0.8rem; color: var(--muted); }
@media (max-width: 820px) { .case { grid-template-columns: 1fr; } }

/* ---------- Contact / intake ---------- */
.intake { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
@media (max-width: 880px) { .intake { grid-template-columns: 1fr; } }
form.bb {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 32px;
}
form.bb .field { margin-bottom: 20px; }
form.bb label { display: block; font-weight: 600; color: var(--navy); margin-bottom: 6px; font-size: 0.95rem; }
form.bb input, form.bb select, form.bb textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--line);
  border-radius: 10px; font-family: inherit; font-size: 0.97rem; color: var(--ink);
  background: var(--paper);
}
form.bb textarea { min-height: 120px; resize: vertical; }
form.bb .hint { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }
.form-status { margin-top: 14px; font-weight: 600; display: none; }
.form-status.ok { display: block; color: #1e7e4e; }
.form-status.err { display: block; color: var(--coral); }

.contact-side .block { margin-bottom: 30px; }
.contact-side .phone { font-size: 1.5rem; font-weight: 700; color: var(--navy); }

/* ---------- Downloads ---------- */
.downloads { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 700px) { .downloads { grid-template-columns: 1fr; } }
.dl {
  display: flex; align-items: center; gap: 14px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; color: var(--navy); font-weight: 600;
}
.dl:hover { border-color: var(--teal); }
.dl svg { flex: none; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--navy); color: #fff; padding: 64px 0; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #cfe3f2; margin: 12px 0 24px; max-width: 60ch; }

/* ---------- Footer ---------- */
footer.site { background: var(--ink); color: #b9c2cf; padding: 44px 0 30px; font-size: 0.9rem; }
footer.site .cols { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 36px; margin-bottom: 28px; }
@media (max-width: 700px) { footer.site .cols { grid-template-columns: 1fr; } }
footer.site img { height: 40px; margin-bottom: 12px; filter: brightness(1.6); }
footer.site h4 { color: #fff; font-size: 0.95rem; margin-bottom: 10px; }
footer.site ul { list-style: none; }
footer.site ul li { margin: 6px 0; }
footer.site a { color: #b9c2cf; }
footer.site a:hover { color: #fff; }
footer.site .legal { border-top: 1px solid #3a3a44; padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.badges { font-weight: 600; color: #dfe6ee; }

/* ---------- Solution detail sections ---------- */
.sol { padding: 72px 0; border-top: 1px solid var(--line); }
.sol .head { display: flex; align-items: center; gap: 16px; margin-bottom: 8px; flex-wrap: wrap; }
.sol .chip { color: #fff; border-radius: 999px; padding: 6px 16px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.05em; }
.sol.teal .chip { background: var(--teal); }
.sol.coral .chip { background: var(--coral); }
.sol.blue .chip { background: var(--blue); }
.sol.navy .chip { background: var(--navy); }
.sol .designed {
  background: var(--paper); border-left: 5px solid var(--navy); border-radius: 8px;
  padding: 16px 20px; margin: 22px 0 30px; color: var(--muted); max-width: 75ch;
}
.sol .designed strong { color: var(--navy); }
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin: 8px 0 40px; }
@media (max-width: 820px) { .cols3 { grid-template-columns: 1fr; } }
.cols3 h4 { margin-bottom: 10px; padding-bottom: 8px; border-bottom: 2px solid var(--line); }
.cols3 ul { list-style: none; }
.cols3 ul li { padding-left: 20px; position: relative; margin: 8px 0; color: var(--muted); font-size: 0.94rem; }
.cols3 ul li::before { content: ""; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.sol.teal .cols3 ul li::before { background: var(--teal); }
.sol.coral .cols3 ul li::before { background: var(--coral); }
.sol.navy .cols3 ul li::before { background: var(--navy); }
.sol .dl-row { margin-top: 30px; }

/* ---------- Product screenshots ---------- */
.shot { margin: 34px 0 10px; }
.shot img { width: 100%; }
.shot figcaption { text-align: center; font-size: 0.88rem; color: var(--muted); margin-top: 6px; }