/* RFIDapp — marketing site styles */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --text: #14171a;
  --text-muted: #5b6169;
  --accent: #0a6cff;
  --accent-dark: #0850c4;
  --border: #e4e7eb;
  --card-bg: #ffffff;
  --radius: 14px;
  --max-width: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013;
    --bg-alt: #16191d;
    --text: #f2f3f5;
    --text-muted: #a2a8b0;
    --accent: #4f9cff;
    --accent-dark: #7db4ff;
    --border: #262a30;
    --card-bg: #16191d;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

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

/* Header */

header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 12px;
}

@media (max-width: 720px) {
  header.site .wrap {
    height: auto;
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  nav.site {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    row-gap: 8px;
    column-gap: 14px;
    font-size: 0.9rem;
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
}

nav.site {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
}

nav.site a {
  color: var(--text-muted);
}

nav.site a:hover {
  color: var(--text);
}

.lang-switch a {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.lang-switch a.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Hero */

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 32px;
}

.cta-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  text-decoration: none;
}

/* Notice / callout */

.notice {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 0 auto 64px;
  max-width: 720px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.notice strong {
  color: var(--text);
}

/* Sections */

section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.7rem;
  margin: 0 0 10px;
  text-align: center;
}

section p.section-lead {
  text-align: center;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 40px;
}

/* Feature grid */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.card .icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

/* Support-compatible list */

.compat {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 640px) {
  .compat {
    grid-template-columns: 1fr;
  }
}

.compat .card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.compat .card.yes {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

/* Simple content pages (privacy / support) */

.content h1 {
  font-size: 2rem;
  margin: 48px 0 8px;
}

.content .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.content h2 {
  font-size: 1.25rem;
  text-align: left;
  margin: 36px 0 10px;
}

.content p, .content li {
  color: var(--text-muted);
}

.content ul {
  padding-left: 20px;
}

.todo {
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-alt));
  border: 1px dashed var(--accent);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.9rem;
  margin: 20px 0;
}

/* Footer */

footer.site {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 40px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}

footer.site nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

footer.site a {
  color: var(--text-muted);
}