/* BLOG (público) — diseño estilo producto Apple. Marcado y lógica: blog.php · blog_apple.js
   Claro y oscuro: sigue al sistema; el botón de la barra lo cambia y lo recuerda (data-theme en <html>). */
:root {
    color-scheme: light dark;
    --bg: #ffffff; --bg2: #f5f5f7; --card: #ffffff; --ink: #1d1d1f; --ink2: #515154; --ink3: #86868b;
    --line: rgba(0, 0, 0, .1); --line2: rgba(0, 0, 0, .06); --field: rgba(0, 0, 0, .05);
    --accent: #0071e3; --accent2: #5e5ce6; --on-accent: #ffffff;
    --nav: rgba(255, 255, 255, .72);
    --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 12px 36px rgba(0, 0, 0, .07);
    --shadow-hover: 0 2px 4px rgba(0, 0, 0, .05), 0 22px 54px rgba(0, 0, 0, .13);
    --glow1: rgba(0, 113, 227, .10); --glow2: rgba(175, 82, 222, .08);
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #000000; --bg2: #0a0a0c; --card: #161618; --ink: #f5f5f7; --ink2: #b0b0b6; --ink3: #7d7d83;
        --line: rgba(255, 255, 255, .14); --line2: rgba(255, 255, 255, .08); --field: rgba(255, 255, 255, .09);
        --accent: #2997ff; --accent2: #bf5af2; --on-accent: #ffffff;
        --nav: rgba(22, 22, 24, .72);
        --shadow: 0 1px 0 rgba(255, 255, 255, .04) inset, 0 16px 44px rgba(0, 0, 0, .5);
        --shadow-hover: 0 1px 0 rgba(255, 255, 255, .06) inset, 0 26px 64px rgba(0, 0, 0, .65);
        --glow1: rgba(41, 151, 255, .20); --glow2: rgba(191, 90, 242, .15);
    }
}
:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #000000; --bg2: #0a0a0c; --card: #161618; --ink: #f5f5f7; --ink2: #b0b0b6; --ink3: #7d7d83;
    --line: rgba(255, 255, 255, .14); --line2: rgba(255, 255, 255, .08); --field: rgba(255, 255, 255, .09);
    --accent: #2997ff; --accent2: #bf5af2; --on-accent: #ffffff;
    --nav: rgba(22, 22, 24, .72);
    --shadow: 0 1px 0 rgba(255, 255, 255, .04) inset, 0 16px 44px rgba(0, 0, 0, .5);
    --shadow-hover: 0 1px 0 rgba(255, 255, 255, .06) inset, 0 26px 64px rgba(0, 0, 0, .65);
    --glow1: rgba(41, 151, 255, .20); --glow2: rgba(191, 90, 242, .15);
}
:root[data-theme="light"] { color-scheme: light; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { margin: 0; background: var(--bg); max-width: 100%; }
html { overflow-x: hidden; }
body { overflow-x: clip; } /* sin 'hidden' en el body: así las barras fijas (sticky) funcionan */
body { font-family: var(--font); color: var(--ink); line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 2px; border-radius: 10px; }

/* ── Barra superior ── */
.bz-nav { position: sticky; top: 0; z-index: 50; background: var(--nav); -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line2); }
.bz-nav-in { max-width: 1120px; margin: 0 auto; height: 56px; padding: 0 20px; display: flex; align-items: center; gap: 24px; }
.bz-brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; letter-spacing: -.02em; color: var(--ink); }
.bz-brand:hover { text-decoration: none; }
.bz-brand svg { width: 26px; height: 26px; }
.bz-links { display: flex; gap: 22px; margin-left: 8px; }
.bz-links a { font-size: 14px; font-weight: 500; color: var(--ink2); }
.bz-links a:hover, .bz-links a[aria-current] { color: var(--ink); text-decoration: none; }
.bz-tools { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.bz-pill { font-size: 13px; font-weight: 600; color: var(--ink); background: var(--field); padding: 7px 13px; border-radius: 999px; }
.bz-pill:hover { text-decoration: none; filter: brightness(.95); }
.bz-icon { appearance: none; border: 0; cursor: pointer; width: 34px; height: 34px; border-radius: 999px; background: var(--field); color: var(--ink); display: inline-grid; place-items: center; }
.bz-icon:hover { filter: brightness(.95); }
.bz-icon svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.bz-icon .i-sol { display: none; }
:root[data-theme="dark"] .bz-icon .i-sol { display: block; }
:root[data-theme="dark"] .bz-icon .i-luna { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .bz-icon .i-sol { display: block; }
    :root:not([data-theme="light"]) .bz-icon .i-luna { display: none; }
}

/* ── Estructura ── */
.bz-wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.bz-narrow { max-width: 740px; margin: 0 auto; padding: 0 20px; }
main { padding-bottom: 96px; }

/* ── Portada del blog ── */
.bz-hero { position: relative; text-align: center; padding: 76px 0 36px; }
.bz-hero::before { content: ""; position: absolute; inset: -80px -10% auto; height: 520px; z-index: -1; pointer-events: none;
    background: radial-gradient(52% 60% at 28% 22%, var(--glow1), transparent 70%), radial-gradient(46% 58% at 76% 14%, var(--glow2), transparent 70%); }
.bz-eyebrow { margin: 0 0 10px; font-size: 14px; font-weight: 600; letter-spacing: .01em; color: var(--accent); }
.bz-hero h1 { margin: 0; font-size: clamp(2.8rem, 8.5vw, 5.6rem); font-weight: 700; line-height: 1.02; letter-spacing: -.045em;
    background: linear-gradient(95deg, var(--ink) 20%, var(--accent) 62%, var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: .06em; }
.bz-sub { margin: 18px auto 0; max-width: 620px; font-size: clamp(1.05rem, 2.2vw, 1.3rem); line-height: 1.4; color: var(--ink2); font-weight: 400; letter-spacing: -.01em; }

/* ── Temas: una sola fila que se desliza + hoja con todos ── */
.bz-temas { position: sticky; top: 56px; z-index: 40; padding: 12px 0; margin: 8px 0 8px; background: var(--nav); -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px); border-block: 1px solid var(--line2); }
.bz-temas-in { max-width: 1120px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 10px; }
.bz-todos { appearance: none; border: 0; cursor: pointer; flex: 0 0 auto; font: inherit; font-size: 14px; font-weight: 600; color: var(--ink); background: var(--field); padding: 9px 15px; border-radius: 999px; display: none; align-items: center; gap: 8px; }
.bz-todos.on { display: inline-flex; }
.bz-todos:hover { filter: brightness(.95); }
.bz-todos svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.bz-todos small { font-size: 12px; font-weight: 700; color: var(--ink3); }
.bz-railwrap { position: relative; flex: 1 1 auto; min-width: 0; }
.bz-rail { display: flex; gap: 8px; overflow-x: auto; scroll-snap-type: x proximity; scrollbar-width: none; -ms-overflow-style: none; padding: 2px 0; scroll-behavior: smooth;
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 var(--fi, 0px), #000 calc(100% - var(--fd, 28px)), transparent 100%);
            mask-image: linear-gradient(90deg, transparent 0, #000 var(--fi, 0px), #000 calc(100% - var(--fd, 28px)), transparent 100%); }
.bz-rail::-webkit-scrollbar { display: none; }
.bz-rail.scroll-i { --fi: 28px; }
.bz-rail.fin { --fd: 0px; }
.bz-chip { flex: 0 0 auto; scroll-snap-align: start; white-space: nowrap; font-size: 14px; font-weight: 500; color: var(--ink2); background: transparent; border: 1px solid var(--line); padding: 8px 15px; border-radius: 999px; transition: background .15s, color .15s, border-color .15s; }
.bz-chip:hover { text-decoration: none; color: var(--ink); background: var(--field); }
.bz-chip[aria-current] { color: var(--on-accent); background: var(--accent); border-color: transparent; font-weight: 600; }
.bz-flecha { appearance: none; border: 0; cursor: pointer; position: absolute; top: 50%; transform: translateY(-50%); z-index: 2; width: 30px; height: 30px; border-radius: 999px; background: var(--card); color: var(--ink); box-shadow: 0 1px 6px rgba(0, 0, 0, .25); display: none; place-items: center; }
.bz-flecha svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.bz-flecha.i { left: -4px; } .bz-flecha.d { right: -4px; }
@media (hover: hover) and (min-width: 700px) { .bz-flecha.show { display: inline-grid; } }

.bz-hoja { border: 0; padding: 0; width: min(760px, calc(100vw - 24px)); max-height: min(78vh, 720px); border-radius: 26px; background: var(--card); color: var(--ink); box-shadow: 0 30px 90px rgba(0, 0, 0, .45); overflow: hidden; }
.bz-hoja::backdrop { background: rgba(0, 0, 0, .45); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.bz-hoja[open] { display: flex; flex-direction: column; animation: bz-sube .22s ease-out; }
@keyframes bz-sube { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.bz-hoja-h { display: flex; align-items: center; gap: 12px; padding: 20px 22px 12px; }
.bz-hoja-h h2 { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: -.02em; flex: 1; }
.bz-hoja-b { padding: 0 22px 12px; }
.bz-hoja-b input { width: 100%; font: inherit; font-size: 16px; color: var(--ink); background: var(--field); border: 0; border-radius: 12px; padding: 11px 14px; }
.bz-hoja-b input::placeholder { color: var(--ink3); }
.bz-hoja-l { overflow: auto; padding: 4px 22px 24px; columns: 3 200px; column-gap: 24px; }
.bz-fila { display: block; break-inside: avoid; padding: 9px 12px; margin: 0 -12px; border-radius: 10px; font-size: 15px; color: var(--ink); }
.bz-fila:hover { background: var(--field); text-decoration: none; }
.bz-fila[aria-current] { color: var(--accent); font-weight: 700; }
.bz-vacio-h { padding: 14px 0; color: var(--ink3); }

/* ── Tarjetas ── */
.bz-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin-top: 26px; }
.bz-card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line2); border-radius: 26px; overflow: hidden; color: var(--ink); box-shadow: var(--shadow); transition: transform .35s cubic-bezier(.2, .8, .2, 1), box-shadow .35s; }
.bz-card:hover { text-decoration: none; transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.bz-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg2); }
.bz-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s cubic-bezier(.2, .8, .2, 1); }
.bz-card:hover .bz-media img { transform: scale(1.045); }
.bz-ph { position: absolute; inset: 0; display: grid; place-items: center; background: radial-gradient(80% 90% at 30% 20%, color-mix(in srgb, var(--accent) 32%, transparent), transparent 70%), radial-gradient(70% 80% at 80% 90%, color-mix(in srgb, var(--accent2) 28%, transparent), transparent 70%), var(--bg2); }
.bz-ph svg { width: 54px; height: 54px; fill: none; stroke: var(--accent); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; opacity: .9; }
.bz-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.bz-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink3); margin-bottom: 8px; }
.bz-tag { font-size: 12px; font-weight: 700; letter-spacing: .02em; color: var(--accent); }
.bz-card h2, .bz-card h3 { margin: 0 0 8px; font-size: 1.3rem; line-height: 1.2; font-weight: 700; letter-spacing: -.025em; color: var(--ink); }
.bz-card p { margin: 0; font-size: 15px; line-height: 1.45; color: var(--ink2); }
.bz-mas { margin-top: auto; padding-top: 16px; font-size: 15px; font-weight: 600; color: var(--accent); }
.bz-card.feat { grid-column: 1 / -1; flex-direction: row; }
.bz-card.feat .bz-media { flex: 1.25 1 0; aspect-ratio: auto; min-height: 340px; }
.bz-card.feat .bz-body { flex: 1 1 0; justify-content: center; padding: 38px 40px; }
.bz-card.feat h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); letter-spacing: -.035em; line-height: 1.1; margin-bottom: 14px; }
.bz-card.feat p { font-size: 17px; }
.bz-card.feat .bz-mas { margin-top: 22px; padding-top: 0; }
.bz-vacio { text-align: center; color: var(--ink3); padding: 70px 0; font-size: 17px; }

/* ── Paginación ── */
.bz-pager { display: flex; justify-content: center; gap: 12px; margin-top: 44px; }
.bz-pager a { font-size: 15px; font-weight: 600; color: var(--ink); background: var(--field); padding: 11px 22px; border-radius: 999px; }
.bz-pager a:hover { text-decoration: none; filter: brightness(.95); }

/* ── Artículo ── */
.bz-art { padding-top: 54px; }
.bz-art .bz-tag-link { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .02em; color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); padding: 6px 13px; border-radius: 999px; margin-bottom: 18px; }
.bz-art .bz-tag-link:hover { text-decoration: none; filter: brightness(.95); }
.bz-art h1 { margin: 0 0 14px; font-size: clamp(2.1rem, 5.6vw, 3.6rem); font-weight: 700; line-height: 1.06; letter-spacing: -.04em; }
.bz-art .bz-fecha { font-size: 14px; color: var(--ink3); margin-bottom: 30px; }
.bz-cover { width: 100%; height: auto; display: block; border-radius: 28px; margin: 0 0 38px; background: var(--bg2); box-shadow: var(--shadow); }
.bz-content { font-size: 1.14rem; line-height: 1.7; color: var(--ink); letter-spacing: -.003em; }
.bz-content p { margin: 0 0 1.15em; }
.bz-content img { max-width: 100%; height: auto; border-radius: 16px; }
.bz-content h2 { font-size: clamp(1.55rem, 3vw, 2rem); line-height: 1.15; letter-spacing: -.03em; margin: 2.1em 0 .6em; }
.bz-content h3 { font-size: 1.3rem; letter-spacing: -.02em; margin: 1.7em 0 .5em; }
.bz-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.bz-content ul, .bz-content ol { padding-left: 1.3em; margin: 0 0 1.15em; }
.bz-content li { margin: .35em 0; }
.bz-content blockquote { border-left: 3px solid var(--accent); margin: 1.6em 0; padding: 4px 22px; color: var(--ink2); font-size: 1.12em; }
.bz-content table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .95em; display: block; overflow-x: auto; }
.bz-content th, .bz-content td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.bz-content pre, .bz-content code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--field); border-radius: 8px; }
.bz-content code { padding: 2px 6px; } .bz-content pre { padding: 14px 16px; overflow-x: auto; }
.bz-cta { margin-top: 48px; padding: 30px 32px; border-radius: 28px; text-align: center; font-size: 1.05rem; line-height: 1.55; color: var(--ink);
    background: radial-gradient(90% 140% at 10% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 65%), radial-gradient(80% 140% at 100% 100%, color-mix(in srgb, var(--accent2) 14%, transparent), transparent 65%), var(--card);
    border: 1px solid var(--line2); box-shadow: var(--shadow); }
.bz-cta p { margin: 0; }
.bz-related { margin-top: 72px; padding-top: 12px; }
.bz-related h2 { margin: 0; font-size: clamp(1.6rem, 3.4vw, 2.1rem); font-weight: 700; letter-spacing: -.03em; }
.bz-related .bz-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bz-404 { padding: 110px 0 40px; text-align: center; }
.bz-404 h1 { font-size: clamp(2rem, 6vw, 3.4rem); letter-spacing: -.04em; margin: 0 0 18px; }

/* ── Pie ── */
.bz-foot { border-top: 1px solid var(--line2); padding: 34px 20px 44px; text-align: center; color: var(--ink3); font-size: 13px; background: var(--bg2); }
.bz-foot a { color: var(--ink2); }

/* ── Pantallas pequeñas ── */
@media (max-width: 980px) {
    .bz-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bz-card.feat .bz-media { min-height: 280px; }
}
@media (max-width: 720px) {
    .bz-nav-in { gap: 14px; padding: 0 16px; }
    .bz-links { gap: 16px; margin-left: 0; }
    .bz-wrap, .bz-narrow { padding: 0 16px; }
    .bz-temas-in { padding: 0 16px; }
    .bz-hero { padding: 48px 0 24px; }
    .bz-grid, .bz-related .bz-grid { grid-template-columns: 1fr; gap: 16px; }
    .bz-card { border-radius: 22px; }
    .bz-card.feat { flex-direction: column; }
    .bz-card.feat .bz-media { flex: none; aspect-ratio: 16 / 10; min-height: 0; }
    .bz-card.feat .bz-body { padding: 22px 22px 26px; }
    .bz-card.feat p { font-size: 15px; }
    .bz-hoja { width: calc(100vw - 16px); max-height: 86vh; border-radius: 22px; }
    .bz-hoja-l { columns: 1; }
    .bz-cta { padding: 24px 20px; border-radius: 22px; }
    .bz-cover { border-radius: 20px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .bz-card, .bz-media img, .bz-hoja[open] { transition: none; animation: none; }
    .bz-card:hover { transform: none; }
}