/* Vega Studio Research · lo propio de las páginas de paper, sobre /assets/vega.css.
   La portada es el objeto: arranca girada como un libro y se endereza con el scroll. */

/* ---------- Nav corta: volver al sitio y el CTA ---------- */
.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-back { font: 500 var(--fs-mono) var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--mute); text-decoration: none; transition: color var(--dur-fast); }
.nav-back:hover { color: var(--paper); }
.nav-right .btn { min-height: 40px; padding: 8px 18px; font-size: .88rem; }
@media (max-width: 620px) { .nav-back { display: none; } }

/* ---------- Hero ---------- */
.hero { padding: calc(var(--nav-h) + clamp(40px, 7vw, 96px)) 0 clamp(48px, 7vw, 80px); --dots-at: 85% 35%; }
.hero-grid { display: grid; gap: clamp(36px, 5vw, 64px); align-items: center; }
.hero h1 { margin: 20px 0 18px; font-size: clamp(2.6rem, 1.2rem + 5vw, 5.4rem); }
.hero .lede { font-size: clamp(1.05rem, 1rem + .5vw, 1.3rem); }
.meta-row { display: flex; flex-wrap: wrap; gap: 26px; margin: 28px 0 34px; padding-top: 22px; border-top: 1px solid var(--line); }
.meta-row div { display: flex; flex-direction: column; gap: 5px; }
.meta-row .k { font: 500 .6rem var(--mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--faint); }
.meta-row .v { font-size: .92rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.cover-wrap { perspective: 1400px; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.15fr .85fr; } }

/* ---------- Portada ---------- */
.cover { min-height: 420px; padding: 38px 32px; display: flex; flex-direction: column; border-color: var(--gold-soft); background: linear-gradient(160deg, #18150e, var(--surface) 55%); box-shadow: 0 40px 80px -40px #000; }
.c-top { display: flex; justify-content: space-between; align-items: center; font: 500 .6rem var(--mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--gold); }
.c-brand { display: flex; align-items: center; gap: 8px; }
.c-brand .mark { width: 22px; height: 22px; }
.c-title { margin-top: auto; font-size: clamp(2rem, 1.4rem + 3vw, 3rem); font-weight: 800; line-height: 1; letter-spacing: -.04em; }
.c-rule { width: 64px; height: 1px; margin: 22px 0 18px; background: var(--gold); }
.c-sub { color: var(--mute); font-size: .9rem; line-height: 1.5; }
.c-foot { margin-top: auto; padding-top: 28px; font: 500 .6rem var(--mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--faint); }

/* ---------- Secciones ---------- */
main section.block, .download { padding: clamp(56px, 8vw, 104px) 0; }
main h2 { font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3.2rem); }
.sec-eyebrow { margin-bottom: 26px; }
.block h2 { margin-bottom: 22px; }
p { max-width: 64ch; }
.two-col { display: grid; gap: clamp(28px, 4vw, 52px); }
@media (min-width: 820px) { .two-col { grid-template-columns: 1fr 1fr; } }
.toc { list-style: none; display: flex; flex-direction: column; margin-top: 8px; }
.toc li { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.toc li span { flex: none; padding-top: .15em; font: 500 .72rem var(--mono); color: var(--gold); }
.stats { display: grid; gap: 18px; margin-top: 10px; }
.stat { padding: 26px 22px; }
.stat:nth-child(odd) { --r: -2deg; } .stat:nth-child(even) { --r: 2deg; }
.stat .n { font: italic 400 clamp(2.4rem, 2rem + 1.4vw, 3.2rem)/.9 var(--serif); color: var(--gold-bright); }
.stat .d { margin-top: 12px; color: var(--mute); font-size: .86rem; line-height: 1.5; }
@media (min-width: 520px) { .stats { grid-template-columns: 1fr 1fr; } }
.who-list { list-style: none; display: flex; flex-direction: column; gap: 14px; margin-top: 6px; }
.who-list li { position: relative; padding-left: 26px; color: var(--mute); }
.who-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: 10px; height: 1px; background: var(--gold); }

/* ---------- Descarga ---------- */
.gate-card { padding: clamp(30px, 4vw, 48px); display: flex; flex-direction: column; gap: 20px; border-color: var(--gold-soft); }
.gate-card h2 { margin: 0; }
.gate-card .fine { color: var(--faint); font-size: .8rem; line-height: 1.5; max-width: 60ch; }
.gate-card .fine a { color: var(--gold); }
.unlocked-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.unlocked-note { display: inline-flex; align-items: center; gap: 10px; font: 500 .66rem var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--gold); }
.unlocked-note::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

/* ---------- Modal de captura ---------- */
.wp-modal { position: fixed; inset: 0; z-index: 210; display: none; align-items: center; justify-content: center; padding: 20px; background: rgba(5,5,5,.72); backdrop-filter: blur(6px); }
.wp-modal.open { display: flex; }
.wp-card { width: min(480px, 100%); max-height: calc(100vh - 40px); overflow: auto; padding: clamp(28px, 4vw, 40px); display: flex; flex-direction: column; gap: 18px; border-color: var(--gold-soft); }
.wp-card .x { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 1px solid var(--line-strong); border-radius: 50%; background: none; color: var(--mute); font-size: 1.1rem; line-height: 1; cursor: pointer; }
.wp-card .x:hover { color: var(--paper); border-color: var(--gold); }
.wp-card .head .k { font: 500 .6rem var(--mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--gold); }
.wp-card h3 { margin-top: 8px; }
.wp-card p.sub { color: var(--mute); font-size: .9rem; }
.wp-card form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font: 500 .62rem var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--mute); }
.field input { width: 100%; min-height: 50px; padding: 13px 15px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: rgba(255,255,255,.03); color: var(--paper); font: 400 1rem var(--font); }
.field input:focus { border-color: var(--gold); background: rgba(255,255,255,.05); outline: none; }
.wp-status { min-height: 1.3em; font-size: .9rem; }
.wp-status.ok, .wp-status a { color: var(--gold); }
.wp-status.err { color: #e07b6a; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ---------- Texto completo, resumen y preguntas ---------- */
.pt-body { max-width: 72ch; }
.pt-body h3 { margin: 56px 0 16px; font-size: clamp(1.25rem, 1.1rem + .6vw, 1.6rem); scroll-margin-top: 96px; }
.pt-body h4 { margin: 34px 0 12px; font-size: 1.05rem; }
.pt-body p, .pt-body li { color: var(--mute); line-height: 1.75; }
.pt-body p + p { margin-top: 14px; }
.pt-body strong { color: var(--paper); }
.pt-body ul, .pt-body ol { margin: 16px 0 16px 1.2em; display: flex; flex-direction: column; gap: 10px; }
.pt-body blockquote { margin: 26px 0; padding: 4px 0 4px 22px; border-left: 1px solid var(--gold); }
.pt-body blockquote p { color: var(--paper); }
.pt-meta { margin-bottom: 22px; font: 500 .72rem var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--faint); }
.pt-note { margin: 22px 0; padding: 18px 20px; border: 1px solid var(--line); }
.pt-answer { font-size: clamp(1.02rem, 1rem + .3vw, 1.15rem); color: var(--paper) !important; }
.pt-keys { margin-top: 22px !important; }
.pt-small { font-size: .88rem; }
.pt-formula { margin: 18px 0; padding: 14px 18px; border: 1px solid var(--line); font: .92rem var(--mono); color: var(--gold) !important; }
.pt-table { overflow-x: auto; margin: 22px 0; }
.pt-table table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.pt-table caption { padding-bottom: 12px; caption-side: top; text-align: left; font: 500 .7rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--gold); }
.pt-table th, .pt-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; color: var(--mute); }
.pt-table thead th, .pt-table tbody th { color: var(--paper); font-weight: 500; }
.paper-faq details { padding: 18px 0; border-bottom: 1px solid var(--line); }
.paper-faq summary { cursor: pointer; font-weight: 500; list-style-position: outside; }
.paper-faq details p { margin-top: 12px; }

@supports (animation-timeline: scroll()) {
  @media (prefers-reduced-motion: no-preference) and (min-width: 900px) {
    .cover { animation: turn linear both; animation-timeline: scroll(); animation-range: 0 70vh; }
    @keyframes turn { from { rotate: y -22deg; translate: 0 0 -40px; } }
  }
}