/* ============================================================
   my-qrcode — hoja de estilos única
   ============================================================ */

:root {
  color-scheme: light;
  --bg: #faf9f6;
  --surface: #ffffff;
  --ink: #16171d;
  --ink-soft: #565a66;
  --line: #e3e1da;
  --accent: #d8542f;
  --accent-ink: #ffffff;
  --ok: #1d7a4f;
  --warn: #a86400;
  --bad: #bb2d1c;
  --radius: 14px;
  --gutter: clamp(16px, 4vw, 32px);
  --maxw: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.18; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.02em; }
p { margin: 0 0 1em; }
a { color: inherit; }
.muted { color: var(--ink-soft); font-weight: 400; font-style: normal; }
.small { font-size: .85rem; }

/* ---------- Cabecera ---------- */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: var(--maxw); margin: 0 auto; padding: 18px var(--gutter);
}
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; text-decoration: none; color: var(--accent); font-size: 1.05rem; white-space: nowrap; }
.logo span { color: var(--ink); }
.header-right { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: flex-end; }
.site-header nav { display: flex; gap: 18px; font-size: .92rem; }
.site-header nav a { color: var(--ink-soft); text-decoration: none; }
.site-header nav a:hover { color: var(--accent); }

/* ---------- Selector de idioma ---------- */
.lang-switch { display: flex; gap: 2px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.lang {
  display: flex; align-items: center; gap: 5px;
  font-size: .82rem; font-weight: 700; letter-spacing: .02em;
  color: var(--ink-soft); text-decoration: none;
  padding: 4px 10px; border-radius: 999px;
}
.lang:hover { color: var(--ink); }
.lang.is-on { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.lang:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Hero ---------- */
.hero { max-width: var(--maxw); margin: 0 auto; padding: 8px var(--gutter) 20px; }
.hero h1 { font-size: clamp(1.75rem, 5.2vw, 2.7rem); }
.hero .sub { color: var(--ink-soft); max-width: 62ch; font-size: 1.02rem; margin: 0; }

/* ---------- Tarjeta de la herramienta ---------- */
.tool-card {
  max-width: var(--maxw); margin: 20px auto 0;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(16px, 3vw, 26px);
}
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(20px, 3vw, 34px); }
@media (max-width: 900px) { .tool-grid { grid-template-columns: 1fr; } }

.noscript-msg { background: #fff3cd; color: #6b4c00; border-radius: 10px; padding: 12px 14px; }

.panel-h { font-size: .85rem; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-soft); margin: 22px 0 10px; font-weight: 800; }

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: .87rem; font-weight: 600; margin-bottom: 6px; }
.field input[type=text], .field input[type=url], .field select {
  width: 100%; padding: 11px 13px; font: inherit; font-size: .96rem;
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px;
}
.field input:focus-visible, .field select:focus-visible, .btn:focus-visible, .chip:focus-visible, .tab:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.field input[type=color] {
  width: 100%; height: 44px; padding: 4px; background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
}
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.tabs { display: flex; gap: 6px; background: var(--bg); border: 1px solid var(--line); border-radius: 11px; padding: 4px; margin-bottom: 16px; }
.tab { flex: 1; border: 0; background: transparent; color: var(--ink-soft); font: inherit; font-weight: 600; font-size: .92rem; padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.tab.is-on { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }

.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink-soft);
  font: inherit; font-size: .87rem; font-weight: 600;
  padding: 7px 12px; border-radius: 999px; cursor: pointer;
  transition: border-color .15s, color .15s;
}
.chip:hover { border-color: var(--accent); color: var(--ink); }
.chip.is-on { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); }
.chip.emoji { font-size: 1.15rem; padding: 4px 9px; line-height: 1.5; }

.logo-row { display: flex; gap: 8px; margin-top: 9px; align-items: center; flex-wrap: wrap; }

.btn {
  font: inherit; font-weight: 700; font-size: .94rem;
  padding: 12px 18px; border-radius: 11px; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  transition: transform .12s, filter .15s;
}
.btn:hover { filter: brightness(1.04); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .5; cursor: progress; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn-ghost { background: transparent; }
.btn-3mf { width: 100%; }

.downloads { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.downloads .btn { flex: 1 1 auto; min-width: 46%; }

.privacy { font-size: .84rem; color: var(--ink-soft); margin: 14px 0 0; }
.hint { font-size: .84rem; color: var(--ink-soft); margin: 6px 0 12px; }
.viewer-tip { margin-top: 8px; }

/* ---------- Vista previa 2D ---------- */
.qr-stage {
  display: grid; place-items: center; padding: 18px;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  min-height: 240px;
}
#qr-preview canvas, #qr-preview svg { display: block; max-width: 100%; height: auto; border-radius: 8px; }

/* ---------- Objeto 3D ---------- */
.obj3d { margin-top: 22px; }
.viewer-wrap { margin-top: 14px; }
.viewer {
  position: relative; width: 100%; aspect-ratio: 4 / 3; min-height: 220px;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: grid; place-items: center; touch-action: none;
}
.viewer canvas { display: block; width: 100%; height: 100%; }
.viewer-msg { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 20px; font-size: .9rem; color: var(--ink-soft); }

.warnings { display: grid; gap: 8px; margin: 14px 0 0; }
.warn-item { font-size: .87rem; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); }
.warn-item.ok  { border-color: color-mix(in srgb, var(--ok) 45%, var(--line));  color: var(--ok); }
.warn-item.mid { border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); color: var(--warn); }
.warn-item.bad { border-color: color-mix(in srgb, var(--bad) 50%, var(--line)); color: var(--bad); }

/* ---------- Huecos de anuncios ---------- */
.ad-slot {
  display: grid; place-items: center;
  border: 1px dashed color-mix(in srgb, var(--ink-soft) 45%, transparent);
  border-radius: 10px; color: var(--ink-soft);
  font-size: .72rem; letter-spacing: .16em; font-weight: 700;
}
.ad-leaderboard { max-width: var(--maxw); margin: 26px auto; min-height: 90px; }
.ad-incontent { max-width: 720px; margin: 30px auto; min-height: 250px; }
.ad-modal-slot { width: 100%; min-height: 250px; margin: 12px 0 16px; }
.ad-corner { width: 260px; min-height: 200px; background: var(--surface); }

.ad-toast {
  position: fixed; right: 14px; bottom: 14px; z-index: 60;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.18);
}
.ad-toast-x, .ad-modal-x {
  position: absolute; top: 4px; right: 6px; z-index: 2;
  border: 0; background: transparent; color: var(--ink-soft);
  font-size: 1.5rem; line-height: 1; cursor: pointer; padding: 2px 6px;
}
@media (max-width: 620px) { .ad-toast { display: none; } }

.ad-modal {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--ink);
  padding: 22px; width: min(360px, 92vw);
}
.ad-modal::backdrop { background: rgba(0,0,0,.5); }
.ad-modal-t { font-weight: 700; margin: 0 0 4px; }
.ad-modal .btn { width: 100%; }

/* ---------- Secciones de contenido ---------- */
section { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.pasos, .usos, .seo-text, .faq { margin-top: 54px; }
.pasos h2, .usos h2, .seo-text h2, .faq h2 { font-size: clamp(1.35rem, 3.4vw, 1.85rem); }

.pasos-grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.pasos-grid li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.pasos-grid h3 { font-size: 1.05rem; margin-bottom: .35em; }
.pasos-grid p { margin: 0; color: var(--ink-soft); font-size: .93rem; }
.num { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 800; font-size: .9rem; margin-bottom: 12px; }

.usos-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.uso { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.uso .ico { font-size: 1.5rem; display: block; margin-bottom: 8px; }
.uso h3 { font-size: 1rem; margin-bottom: .3em; }
.uso p { margin: 0; color: var(--ink-soft); font-size: .91rem; }

.seo-text { max-width: 760px; }
.seo-text p { color: var(--ink-soft); }
.seo-text h3 { font-size: 1.12rem; margin-top: 1.6em; }

.faq { max-width: 820px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); padding: 4px 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 13px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 800; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--ink-soft); margin: 0 0 14px; font-size: .95rem; }

/* ---------- Pie ---------- */
.site-footer { max-width: var(--maxw); margin: 64px auto 0; padding: 26px var(--gutter) 48px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .9rem; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0; }
.site-footer a { color: var(--ink-soft); }

/* ---------- Páginas legales ---------- */
.legal { max-width: 760px; padding-top: 20px; }
.legal h2 { font-size: 1.15rem; margin-top: 1.8em; }
.legal p, .legal li { color: var(--ink-soft); }
.todo { background: color-mix(in srgb, var(--warn) 16%, transparent); border-radius: 6px; padding: 1px 6px; color: var(--ink); font-weight: 600; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .01ms !important; }
}