/* ==========================================================================
   Generador QR — ProfeDeEF
   Sections: Reset · Tokens · Layout · Header · Hero · Tool card · Content ·
   FAQ · Footer · Responsive
   ========================================================================== */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  color: var(--ink);
  background: var(--bg);
}
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; line-height: 1.15; }
input, select { font: inherit; color: inherit; }

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

.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--cream); color: var(--bg);
  z-index: 9999; border-radius: 8px; font-weight: 500;
}
.skip-link:focus { top: 1rem; }

/* ---------- Tokens ---------- */
:root {
  --bg: #F4EEDB;
  --cream: #FFFFFF;
  --ink: #1B3A5C;
  --ink-soft: #3C4C5C;
  --accent: #2E7D32;
  --accent-dark: #1F5F23;
  --border: #D6C59C;
  --warn-bg: #FFF3E0;
  --warn-text: #8A4B0B;

  --sans: "Inter", system-ui, sans-serif;
  --display: "Poppins", var(--sans);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12202E;
    --cream: #1B3247;
    --ink: #F4EEDB;
    --ink-soft: #C9D3DC;
    --border: #2E4A61;
  }
}

.wrap { max-width: 960px; margin-inline: auto; padding-inline: 1.25rem; }

/* ---------- Header ---------- */
.site-header { padding: 1.25rem 0; border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; }
.brand {
  font-family: var(--display); font-weight: 700; font-size: 1.15rem;
  color: var(--ink); display: flex; align-items: center; gap: .5rem;
}
.brand-mark { color: var(--accent); font-size: 1.3rem; }
.site-nav a {
  font-size: .9rem; font-weight: 500; color: var(--ink-soft);
  transition: color .2s var(--ease-out);
}
.site-nav a:hover { color: var(--accent); }

/* ---------- Hero ---------- */
.hero { padding: 2.5rem 0 1.25rem; text-align: center; }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--ink); letter-spacing: -0.01em;
}
.hero .subtitle {
  margin-top: .6rem; color: var(--ink-soft); font-size: 1.05rem;
}

/* ---------- Tool section ---------- */
.tool-section { padding-block: 1.5rem 2rem; }

.tool-card {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 2px 18px rgba(27, 58, 92, 0.06);
}

.tabs { display: flex; gap: .5rem; margin-bottom: 1.25rem; }
.tab {
  padding: .55rem 1rem; border-radius: 999px; font-weight: 600; font-size: .92rem;
  color: var(--ink-soft); background: transparent; border: 1px solid var(--border);
  transition: all .2s var(--ease-out);
}
.tab.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 720px) {
  .tool-grid { grid-template-columns: 1.1fr 1fr; align-items: start; }
}

.field-group { display: flex; flex-direction: column; gap: .35rem; margin-bottom: 1rem; }
.field-group label { font-size: .85rem; font-weight: 600; color: var(--ink-soft); }
.field-group input[type="text"],
.field-group select {
  padding: .65rem .8rem; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--ink); font-size: .95rem;
  transition: border-color .2s var(--ease-out);
}
.field-group input[type="text"]:focus,
.field-group select:focus { border-color: var(--accent); }
.field-group input[type="color"] {
  width: 100%; height: 42px; border: 1px solid var(--border); border-radius: 10px;
  padding: 3px; background: var(--cream); cursor: pointer;
}
.field-row { display: flex; gap: 1rem; }
.field-row .field-group { flex: 1; }

.checkbox-label { display: flex; align-items: center; gap: .5rem; font-size: .9rem; color: var(--ink-soft); font-weight: 500; }
.checkbox-label input { width: 16px; height: 16px; }

.is-hidden { display: none !important; }

.warning-msg {
  font-size: .85rem; color: var(--warn-text); background: var(--warn-bg);
  padding: .6rem .8rem; border-radius: 10px; margin-top: .5rem;
}

.tool-preview {
  display: flex; flex-direction: column; align-items: center; gap: 1.25rem;
  padding: 1.25rem; background: var(--bg); border-radius: var(--radius);
}
.qr-preview {
  width: 100%; max-width: 260px; aspect-ratio: 1; display: flex;
  align-items: center; justify-content: center; background: var(--cream);
  border-radius: 10px; border: 1px solid var(--border); overflow: hidden;
}
.qr-preview canvas, .qr-preview svg, .qr-preview img { max-width: 100%; height: auto; }

.download-row { display: flex; gap: .75rem; width: 100%; max-width: 260px; }
.btn-primary, .btn-secondary {
  flex: 1; padding: .75rem 1rem; border-radius: 10px; font-weight: 600; font-size: .9rem;
  text-align: center; transition: transform .15s var(--ease-out), opacity .15s var(--ease-out);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); opacity: .93; }
.btn-secondary { background: transparent; color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.privacy-badge {
  margin-top: 1.25rem; font-size: .85rem; color: var(--ink-soft); text-align: center;
}

/* ---------- Ad slots ---------- */
.ad-slot {
  min-height: 90px; margin-block: 1.5rem; border: 1px dashed var(--border);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
}
.ad-label { font-size: .8rem; color: var(--ink-soft); opacity: .6; }

/* ---------- Content section ---------- */
.content-section { padding-block: 1rem 3rem; }
.content-section h2 {
  font-family: var(--display); font-size: 1.4rem; margin-top: 2rem; margin-bottom: .75rem;
  color: var(--ink);
}
.content-section p { color: var(--ink-soft); margin-bottom: .75rem; }

.steps { padding-left: 1.25rem; color: var(--ink-soft); }
.steps li { margin-bottom: .5rem; }
.steps strong { color: var(--ink); }

details {
  border: 1px solid var(--border); border-radius: 10px; padding: .8rem 1rem;
  margin-bottom: .6rem; background: var(--cream);
}
details summary {
  font-weight: 600; cursor: pointer; color: var(--ink); font-size: .95rem;
}
details p { margin-top: .5rem; margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0; }
.site-footer .wrap {
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; align-items: center; justify-content: space-between;
  font-size: .85rem; color: var(--ink-soft);
}
.site-footer nav { display: flex; gap: 1rem; }
.site-footer a:hover { color: var(--accent); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; }
}