/* Walmart Invoice Exporter — site styles.
   Mirrors the extension's design language: slate surfaces, blue accent,
   light + dark via prefers-color-scheme. No frameworks, no external fonts. */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  --max: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #101a2e;
    --surface-2: #16233c;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --primary: #60a5fa;
    --primary-contrast: #0b1220;
    --border: #24334f;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.55;
}

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

/* ---- Header / nav ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  margin-right: auto;
}
.brand img { width: 28px; height: 28px; border-radius: 6px; }
.brand:hover { text-decoration: none; }

.nav a.navlink { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav a.navlink:hover { color: var(--text); text-decoration: none; }

@media (max-width: 720px) {
  .nav { flex-wrap: wrap; gap: 12px 16px; }
  .brand { flex-basis: 100%; }
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 11px 22px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--primary);
  color: var(--primary-contrast);
  box-shadow: var(--shadow);
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}

/* ---- Hero ---- */

.hero { padding: 72px 0 40px; text-align: center; }

.hero h1 {
  font-size: clamp(32px, 5.5vw, 52px);
  line-height: 1.12;
  margin: 0 auto 18px;
  max-width: 820px;
  letter-spacing: -0.02em;
}
.hero h1 em { color: var(--primary); font-style: normal; }

.hero p.lede {
  color: var(--muted);
  font-size: clamp(16px, 2.2vw, 19px);
  max-width: 680px;
  margin: 0 auto 30px;
}

.hero .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.hero-note { margin-top: 14px; color: var(--muted); font-size: 13.5px; }

.hero-shot {
  margin: 48px auto 0;
  max-width: 960px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-shot img { display: block; width: 100%; height: auto; }

/* ---- Sections ---- */

section { padding: 64px 0; }
section.alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 10px;
}

h2.section-title {
  font-size: clamp(26px, 3.6vw, 34px);
  margin: 0 0 12px;
  letter-spacing: -0.015em;
}

p.section-lede { color: var(--muted); max-width: 720px; margin: 0 0 36px; }

/* ---- Feature grid ---- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
section.alt .card { background: var(--surface-2); }

.card .icon {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  color: var(--primary);
  border-radius: 10px;
  margin-bottom: 14px;
}

.card h3 { margin: 0 0 8px; font-size: 17.5px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* ---- Split rows (screenshot + copy) ---- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  margin-top: 44px;
}
.split.reverse .shot { order: 2; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; gap: 24px; }
  .split.reverse .shot { order: 0; }
}

.split .shot {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.split .shot img { display: block; width: 100%; height: auto; }

.split h3 { font-size: 22px; margin: 0 0 10px; }
.split p, .split li { color: var(--muted); }
.split ul { padding-left: 20px; margin: 12px 0 0; }
.split li { margin-bottom: 8px; }
.split li strong { color: var(--text); }

/* ---- Checklist ---- */

.check-list { list-style: none; padding: 0; margin: 20px 0 0; }
.check-list li {
  padding-left: 30px;
  position: relative;
  margin-bottom: 12px;
  color: var(--muted);
}
.check-list li strong { color: var(--text); }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 5px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 16%, transparent);
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%232563eb" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>');
  background-size: 11px;
  background-position: center;
  background-repeat: no-repeat;
}

/* ---- FAQ (details/summary accordion) ---- */

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-weight: 600;
  font-size: 16.5px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex: none;
  width: 20px; height: 20px;
  background: currentColor;
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"/></svg>') center / contain no-repeat;
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"/></svg>') center / contain no-repeat;
  transition: transform 0.18s ease;
  color: var(--muted);
}
.faq details[open] summary::after { transform: rotate(180deg); }

.faq .answer { padding: 0 22px 20px; color: var(--muted); }
.faq .answer strong { color: var(--text); }
.faq .answer ol, .faq .answer ul { padding-left: 22px; }
.faq .answer li { margin-bottom: 6px; }

.note, .tip {
  border-radius: 10px;
  padding: 12px 16px;
  margin-top: 14px;
  font-size: 14.5px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.tip { border-left: 3px solid var(--primary); }

.copy-link {
  display: inline-block;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  user-select: all;
}
.copy-link:hover { border-color: var(--primary); }

/* ---- Page (FAQ / privacy) headers ---- */

.page-head { padding: 56px 0 8px; }
.page-head h1 { font-size: clamp(28px, 4.5vw, 40px); margin: 0 0 10px; letter-spacing: -0.02em; }
.page-head p { color: var(--muted); max-width: 700px; margin: 0; }
.page-body { padding: 36px 0 72px; }
.page-body h2 { margin-top: 36px; }
.page-body p, .page-body li { color: var(--muted); }
.page-body strong { color: var(--text); }

/* ---- Footer ---- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 56px;
  color: var(--muted);
  font-size: 14.5px;
}
.site-footer .cols {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 48px;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer .heart { color: #ef4444; }
.site-footer nav { display: flex; flex-direction: column; gap: 8px; }