/* ShareMyBill landing — light, fast, accessible */
:root {
  --ink: #1e1b4b;
  --ink-soft: #443d6b;
  --muted: #6b6b7b;
  --paper: #ffffff;
  --soft: #f6f5ff;
  --line: #e6e4f2;
  --violet: #7c3aed;
  --violet-deep: #5b21b6;
  --violet-soft: #ede9fe;
  --bg-dark: #1e1b4b;
  --radius: 14px;
  --shadow: 0 18px 40px -22px rgba(30, 27, 75, 0.35);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink-soft);
  line-height: 1.6;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--violet-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--violet); }
code { background: var(--violet-soft); padding: 0.1em 0.4em; border-radius: 6px; font-size: 0.9em; }

.container { width: min(1140px, 92%); margin-inline: auto; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--violet); color: #fff;
  padding: 0.6rem 1rem; border-radius: 0 0 8px 0; z-index: 50;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--violet); outline-offset: 2px; border-radius: 4px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 700; color: var(--ink); font-size: 1.1rem; text-decoration: none; }
.brand-logo { border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.site-nav a:hover { color: var(--violet); }
.nav-cta { background: var(--violet); color: #fff !important; padding: 0.5rem 1rem; border-radius: 999px; }
.nav-cta:hover { background: var(--violet-deep); }
.nav-download { border: 1.5px solid var(--violet); color: var(--violet-deep) !important; padding: 0.45rem 1rem; border-radius: 999px; }
.nav-download:hover { background: var(--violet-soft); }
.nav-toggle { display: none; border: 0; background: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: 0.2s; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.8rem 1.5rem; border-radius: 999px; font-weight: 600; text-decoration: none;
  font-size: 1rem; transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease; border: 0; cursor: pointer;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary { background: var(--violet); color: #fff !important; box-shadow: 0 10px 24px -10px var(--violet); }
.btn-primary:hover { background: var(--violet-deep); transform: translateY(-1px); }
.btn-secondary { background: var(--paper); color: var(--violet-deep) !important; border: 1.5px solid var(--violet-deep); }
.btn-secondary:hover { background: var(--violet-soft); transform: translateY(-1px); }
.btn-ghost { background: rgba(255, 255, 255, 0.12); color: #fff !important; border: 1.5px solid rgba(255, 255, 255, 0.55); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.22); transform: translateY(-1px); }

/* Hero */
.hero { background: linear-gradient(160deg, #f8f7ff 0%, #f0ecff 60%, #e9e3ff 100%); position: relative; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; width: 560px; height: 560px; right: -200px; top: -260px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.18), transparent 65%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 3rem; align-items: center; padding-block: 4.5rem 4rem; }
.eyebrow, .section-eyebrow {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.8rem; font-weight: 700; color: var(--violet);
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
}
.badge {
  background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 0.3rem 0.7rem;
  font-size: 0.74rem; font-weight: 600; letter-spacing: 0; color: var(--ink-soft); box-shadow: 0 4px 12px -6px rgba(30, 27, 75, 0.25);
}
.hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); line-height: 1.12; color: var(--ink); margin: 1rem 0; font-weight: 800; }
.hero-sub { font-size: 1.12rem; max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 1.6rem; }
.hero-trust { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; padding: 0; margin: 1.8rem 0 0; font-weight: 500; color: var(--ink-soft); }
.hero-trust .tick {
  display: inline-grid; place-items: center; width: 18px; height: 18px; margin-right: 0.35rem;
  background: var(--violet); color: #fff; border-radius: 50%; font-size: 0.7rem; vertical-align: -2px;
}

/* Screenshot frames */
.hero-visual { position: relative; z-index: 1; }
.shot-glow {
  position: absolute; inset: 8% -6% -4% -6%;
  background: radial-gradient(70% 60% at 50% 40%, rgba(124, 58, 237, 0.28), transparent 70%);
  filter: blur(20px); z-index: 0;
}
.shot-frame, .wind-frame {
  position: relative; z-index: 1; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line); background: #10102a; box-shadow: 0 30px 60px -30px rgba(30, 27, 75, 0.5);
}
.shot-bar, .window-bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.65rem 0.9rem; background: #f4f2ff; color: var(--muted); font-size: 0.76rem; }
.shot-bar .dot, .window-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
.shot-bar .r, .window-bar .r { background: #f87171; } .shot-bar .y, .window-bar .y { background: #fbbf24; } .shot-bar .g, .window-bar .g { background: #34d399; }
.shot-bar span:last-child, .window-bar span:last-child { margin-left: 1rem; opacity: 0.85; }
.shot-frame img { width: 100%; height: auto; border-radius: 0 0 15px 15px; }
.hero-shot { transform: rotate(-1deg); }
.wind-frame img { width: 100%; max-height: 520px; object-fit: cover; object-position: top; }
.wind-frame { box-shadow: 0 30px 60px -30px rgba(30, 27, 75, 0.6); }

/* Floating chips */
.chip {
  position: absolute; z-index: 2; display: inline-flex; align-items: center; gap: 0.4rem;
  background: rgba(255, 255, 255, 0.94); backdrop-filter: blur(6px);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.5rem 0.9rem;
  font-size: 0.82rem; font-weight: 600; color: var(--ink); box-shadow: 0 14px 30px -14px rgba(30, 27, 75, 0.45);
  animation: floaty 4s ease-in-out infinite;
}
.chip-a { top: -14px; left: -12px; }
.chip-b { bottom: 26%; right: -16px; animation-delay: 1s; }
.chip-c { bottom: -14px; left: 12%; animation-delay: 2s; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* Trust strip */
.trust-strip { background: var(--bg-dark); color: #e5e3ff; }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; padding-block: 2rem; }
.strip-item { display: flex; align-items: center; gap: 0.9rem; }
.strip-icon { font-size: 1.7rem; line-height: 1; filter: grayscale(0.1); }
.strip-item strong { display: block; color: #fff; font-size: 1rem; }
.strip-item span:not(.strip-icon) { font-size: 0.85rem; color: #b8b2e6; }

/* Sections */
.section { padding-block: 4.5rem; }
.section.alt { background: var(--soft); }
.section-title { font-size: clamp(1.7rem, 3vw, 2.3rem); color: var(--ink); line-height: 1.2; margin: 0.5rem 0 0.6rem; }
.section-sub { max-width: 44em; }
.label { font-weight: 700; color: var(--violet-deep); letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.85rem; }
[id] { scroll-margin-top: 84px; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-top: 2.2rem; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-icon { font-size: 1.9rem; display: inline-block; margin-bottom: 0.7rem; }
.card h3 { margin: 0 0 0.5rem; color: var(--ink); font-size: 1.12rem; }
.card p { margin: 0; font-size: 0.96rem; }

.use-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; margin-top: 2.2rem; }
.use-card { text-align: center; padding: 1.8rem 1.2rem; }
.use-card .card-icon { font-size: 2.2rem; }

/* Split sections */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.split.flip .split-copy { order: 2; }
.split.flip .split-visual { order: 1; }
.ticks { list-style: none; padding: 0; margin: 1.2rem 0 1.6rem; display: grid; gap: 0.6rem; }
.ticks li { padding-left: 1.9rem; position: relative; }
.ticks li::before {
  content: "\2713"; position: absolute; left: 0; top: 1px;
  width: 19px; height: 19px; border-radius: 50%; background: var(--violet-soft); color: var(--violet-deep);
  display: grid; place-items: center; font-size: 0.7rem; font-weight: 700;
}
.small-note { color: var(--muted); font-size: 0.9rem; }

/* Steps */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 2.4rem 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.steps li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; }
.step-num {
  display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  background: var(--violet); color: #fff; font-weight: 800; margin-bottom: 0.9rem;
}
.steps h3 { margin: 0 0 0.4rem; color: var(--ink); }
.steps p { margin: 0; font-size: 0.95rem; }

/* Install guide */
.install-steps { grid-template-columns: repeat(4, 1fr); }
.install-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 1.6rem; }
.callout {
  background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--violet);
  border-radius: var(--radius); padding: 1.1rem 1.3rem;
}
.callout h3 { margin: 0 0 0.3rem; color: var(--ink); font-size: 1.05rem; }
.callout p { margin: 0; font-size: 0.95rem; }
.callout-data { border-left-color: #0ea5e9; }
.center { text-align: center; }

/* Tech band */
.tech-band { text-align: center; }
.tech-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; margin-top: 1.2rem; }
.tech-chips span {
  background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 0.5rem 1rem;
  font-size: 0.9rem; font-weight: 500; color: var(--ink-soft); box-shadow: 0 6px 18px -10px rgba(30, 27, 75, 0.3);
}

/* FAQ */
.narrow { max-width: 820px; }
.faq {
  border: 1px solid var(--line); border-radius: 12px; background: #fff;
  margin: 0.7rem 0; padding: 0.2rem 1.2rem;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--ink); padding: 0.9rem 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--violet); font-size: 1.2rem; font-weight: 700; }
.faq[open] summary::after { content: "\2212"; }
.faq p { margin: 0 0 1rem; font-size: 0.96rem; }
.faq a { font-weight: 500; }

.faq-cta {
  margin-top: 3rem; text-align: center; background: linear-gradient(135deg, #1e1b4b, #3b1870);
  border-radius: 20px; padding: 3rem 1.5rem; color: #cfc8f2;
}
.faq-cta h2 { color: #fff; margin: 0 0 0.4rem; font-size: 1.6rem; }
.faq-cta p { margin: 0 0 1.2rem; }
.faq-cta .btn { margin: 0.3rem; }

/* Footer */
.site-footer { background: #17143a; color: #b8b2e6; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; padding-block: 3.5rem 2rem; }
.footer-brand img { margin-bottom: 0.8rem; }
.footer-tag { max-width: 26em; margin: 0; font-size: 0.95rem; }
.footer-col h3 { color: #fff; font-size: 0.95rem; margin: 0 0 0.9rem; }
.footer-col { display: grid; gap: 0.55rem; }
.footer-col a { color: #b8b2e6; text-decoration: none; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12); padding-block: 1.4rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem; font-size: 0.9rem;
}
.footer-bottom p { margin: 0; }
.footer-note { color: #8f88c9; }

/* Prose (privacy) */
.prose { max-width: 760px; padding-block: 3.5rem 4.5rem; }
.prose h1 { color: var(--ink); font-size: 2.2rem; margin: 0.5rem 0 0.4rem; }
.prose h2 { color: var(--ink); margin-top: 2.2rem; font-size: 1.3rem; }
.prose p, .prose li { font-size: 1rem; }
.prose ul { padding-left: 1.4rem; }

/* Reveal on scroll (progressive enhancement) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chip, .card, .use-card, .steps li { animation: none; transition: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .split.flip .split-copy { order: 1; }
  .split.flip .split-visual { order: 2; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .use-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed; inset: 64px 0 auto 0; background: #fff; flex-direction: column; gap: 0;
    padding: 0.5rem 1rem 1.2rem; border-bottom: 1px solid var(--line);
    transform: translateY(-120%); transition: transform 0.25s ease; box-shadow: 0 20px 30px -20px rgba(0, 0, 0, 0.25);
  }
  .site-nav.open { transform: none; }
  .site-nav a { padding: 0.8rem 0.4rem; width: 100%; text-align: center; border-radius: 8px; }
  .site-nav a:hover { background: var(--violet-soft); }
  .nav-cta, .nav-download { border-radius: 8px; }
  .chip-a { left: 4px; } .chip-b { right: 4px; }
}
@media (max-width: 560px) {
  .feature-grid, .use-grid, .steps, .install-notes, .strip-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding-block: 3.2rem; }
  .hero-actions .btn { width: 100%; }
  .hero-grid { padding-block: 3rem 2.5rem; }
  .chip { font-size: 0.74rem; padding: 0.4rem 0.7rem; }
}