:root {
  --bg: #ffffff; --fg: #1a1a1a; --muted: #6b6b6b; --line: #e6e6e6;
  --card: #ffffff; --brand: #f2a900; --brand-ink: #1a1a1a; --link: #9a6b00;
  --accent: #f2a900; --free: #1f7a4d; --free-bg: #e4f3ea; --prem: #8a5a2b; --prem-bg: #fbeccd;
  --err-bg: #fde8e8; --err: #b42318; --ok: #1f7a4d;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121212; --fg: #f0f0f0; --muted: #a3a3a3; --line: #2a2a2a;
    --card: #1c1c1c; --brand: #f2b100; --brand-ink: #1a1a1a; --link: #f2b100;
    --accent: #f2b100; --free: #6fd79b; --free-bg: #16311f; --prem: #e0b483; --prem-bg: #2c2114;
    --err-bg: #3a1a17; --err: #f1a9a0; --ok: #6fd79b;
  }
}
:root[data-theme="dark"] {
  --bg: #121212; --fg: #f0f0f0; --muted: #a3a3a3; --line: #2a2a2a;
  --card: #1c1c1c; --brand: #f2b100; --brand-ink: #1a1a1a; --link: #f2b100;
  --accent: #f2b100; --free: #6fd79b; --free-bg: #16311f; --prem: #e0b483; --prem-bg: #2c2114;
  --err-bg: #3a1a17; --err: #f1a9a0; --ok: #6fd79b;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: -apple-system, "Segoe UI", system-ui, Arial, sans-serif; line-height: 1.6;
}
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.nav { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.navrow { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; }
.brand img { height: 42px; display: block; background: #fff; padding: 3px 7px; border-radius: 8px; }
.navlinks { display: flex; align-items: center; gap: 14px; }
.inline { display: inline; margin: 0; }
.linkbtn { background: none; border: 0; color: var(--link); cursor: pointer; font: inherit; padding: 0; }
.tema-toggle { display: inline-flex; align-items: center; justify-content: center; color: var(--fg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; }
.tema-toggle svg { display: block; }
.tema-toggle:hover { background: var(--line); }

.main { padding: 24px 16px 60px; }
h1 { font-size: 30px; margin: 10px 0 14px; }
h2 { font-size: 22px; margin: 32px 0 14px; }
.lead { color: var(--muted); font-size: 18px; }
.muted { color: var(--muted); }
.crumbs { color: var(--muted); font-size: 14px; margin-bottom: 6px; }

.hero { text-align: center; padding: 30px 10px 10px; }
.hero-logo { max-width: 420px; width: 80%; height: auto; margin: 0 auto 10px; display: block; }
.hero p { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 auto 18px; }

.btn { display: inline-block; background: var(--brand); color: var(--brand-ink); padding: 9px 16px; border-radius: 8px; border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { text-decoration: none; opacity: .92; }
.btn.big { padding: 12px 22px; font-size: 17px; }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn.danger { background: #b42318; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.grid.temas { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.tema-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; display: block; color: var(--fg); }
.tema-card h3 { margin: 0 0 6px; color: var(--brand); }
.tema-card p { margin: 0; color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: block; color: var(--fg); transition: transform .08s ease; }
.card:hover { transform: translateY(-2px); text-decoration: none; }
.card-body { padding: 15px; }
.card h3 { margin: 0 0 4px; font-size: 18px; }
.autor { color: var(--muted); font-size: 14px; }
.autor.grande { font-size: 16px; margin-bottom: 10px; }
.sinopsis { color: var(--muted); font-size: 14px; margin: 8px 0 10px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.badge.free { background: var(--free-bg); color: var(--free); }
.badge.prem { background: var(--prem-bg); color: var(--prem); }

/* Lectura */
.lectura { max-width: 680px; margin: 10px auto 0; font-family: Georgia, "Times New Roman", serif; font-size: 19px; line-height: 1.8; }
.lectura p { margin: 0 0 1.1em; }
.lectura.adelanto { position: relative; max-height: 420px; overflow: hidden; }
.lectura.adelanto::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 160px; background: linear-gradient(transparent, var(--bg)); }
.watermark { margin-top: 30px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; text-align: center; font-family: -apple-system, "Segoe UI", sans-serif; }
.muro { max-width: 680px; margin: 0 auto; text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.muro h3 { margin: 0 0 8px; }
.muro p { color: var(--muted); margin: 0 0 16px; }

/* Formularios */
.form-box { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; max-width: 460px; }
.form-box.ancho { max-width: 820px; }
.form-box label { display: block; margin: 0 0 12px; font-size: 14px; color: var(--muted); }
.form-box input, .form-box textarea, .form-box select { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); font: inherit; margin-top: 4px; }
.form-box textarea.mono { font-family: ui-monospace, Consolas, monospace; font-size: 14px; }
.form-box .dos { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.checks { display: flex; gap: 20px; margin: 6px 0 14px; }
.chk { display: flex; align-items: center; gap: 8px; }
.chk input { width: auto; margin: 0; }
.precio { font-size: 26px; font-weight: 800; color: var(--brand); }
.err { background: var(--err-bg); color: var(--err); padding: 9px 12px; border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.ok { color: var(--ok); }

/* Admin */
.admin-cols { display: grid; grid-template-columns: 300px 1fr; gap: 24px; align-items: start; }
.row-between { display: flex; align-items: center; justify-content: space-between; }
.tabla { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.tabla th { background: rgba(0,0,0,.04); text-align: left; padding: 9px 11px; font-size: 13px; }
.tabla td { padding: 9px 11px; border-top: 1px solid var(--line); font-size: 14px; }
.tabla .acc { display: flex; gap: 6px; flex-wrap: wrap; }

.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 40px; margin-top: 30px; }

@media (max-width: 760px) {
  .admin-cols { grid-template-columns: 1fr; }
  .form-box .dos { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
}