/* ============================================================
   Tuvi — páginas públicas de contenido (SEO/GEO).
   MISMO mundo que el landing "EL SERVIDOR": hielo sci-fi, video de
   fondo + atmósfera three.js, texto blanco sobre velo oscuro, cian
   Tuvi, paneles frost-glass, mono JetBrains + display Space Grotesk.
   ============================================================ */

:root {
  --tv-cyan: #28d7e8;
  --tv-cyan-deep: #0cc0d6;
  --tv-cyan-soft: #b5f2fc;
  --tv-green: #17c98b;
  --tv-text: #ffffff;
  --tv-soft: rgba(238, 250, 255, 0.9);
  --tv-dim: rgba(226, 245, 252, 0.66);
  --tv-ink: rgba(8, 22, 34, 0.55);
  --tv-panel: rgba(255, 255, 255, 0.07);
  --tv-panel-2: rgba(255, 255, 255, 0.12);
  --tv-border: rgba(180, 236, 250, 0.28);
  --tv-border-strong: rgba(168, 240, 252, 0.7);
  --tv-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", monospace;
  --tv-display: "Space Grotesk", "Inter", sans-serif;
  --tv-body: "Inter", system-ui, sans-serif;
  --maxw: 1100px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--tv-body);
  color: var(--tv-text);
  line-height: 1.65;
  font-size: 17px;
  /* base oscura de hielo: persiste detrás del video en todo el scroll */
  background:
    radial-gradient(1200px 720px at 78% -6%, rgba(40, 215, 232, 0.16), transparent 58%),
    radial-gradient(1000px 620px at 6% 4%, rgba(23, 201, 139, 0.1), transparent 55%),
    linear-gradient(180deg, #07131f 0%, #0a1b29 42%, #081824 100%);
  text-shadow: 0 1px 3px var(--tv-ink), 0 2px 26px rgba(10, 26, 38, 0.35);
  overflow-x: hidden;
}

::selection { background: rgba(40, 215, 232, 0.4); color: #063540; }

a { color: var(--tv-cyan-soft); text-decoration: none; }
a:hover { color: #fff; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.4rem; position: relative; z-index: 2; }

/* ---------- Escenario fijo (video + atmósfera + overlays) ---------- */
.tv-stage { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.tv-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0.9;
  filter: saturate(1.05) contrast(1.02);
}
.tv-atmos { position: absolute; inset: 0; width: 100%; height: 100%; }
/* velo: oscurece para legibilidad y funde el video con la base de hielo */
.tv-veil {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 16, 26, 0.35) 0%, rgba(6, 16, 26, 0.62) 46%, rgba(6, 17, 27, 0.86) 100%),
    radial-gradient(120% 80% at 50% 0%, transparent 40%, rgba(6, 16, 26, 0.55) 100%);
}
.tv-vignette { position: absolute; inset: 0; box-shadow: inset 0 0 240px 60px rgba(4, 12, 20, 0.75); }
.tv-grain {
  position: absolute; inset: 0; opacity: 0.05; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Header ---------- */
.tv-head {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(1.4) blur(16px);
  background: linear-gradient(180deg, rgba(7, 19, 30, 0.72), rgba(7, 19, 30, 0.32));
  border-bottom: 1px solid rgba(180, 236, 250, 0.14);
}
.tv-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 1rem; }
.tv-brand { display: inline-flex; align-items: baseline; gap: 0.55rem; color: #fff; font-family: var(--tv-display); }
.tv-brand:hover { color: #fff; }
.tv-brand b { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.08em; }
.tv-brand em { font-style: normal; font-family: var(--tv-mono); font-size: 0.6rem; color: var(--tv-cyan-soft); letter-spacing: 0.24em; }
.tv-nav { display: flex; align-items: center; gap: 1.25rem; font-size: 0.9rem; }
.tv-nav a { color: var(--tv-soft); font-weight: 500; }
.tv-nav a:hover { color: #fff; }

.tv-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.62rem 1.2rem; border-radius: 999px; font-weight: 600; font-size: 0.9rem;
  border: 1px solid transparent; cursor: pointer; transition: all 0.18s ease; white-space: nowrap;
  font-family: var(--tv-body);
}
.tv-btn--solid {
  background: linear-gradient(100deg, var(--tv-cyan), #4aa8e6);
  color: #04212a; text-shadow: none;
  box-shadow: 0 14px 34px -16px rgba(40, 215, 232, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.tv-btn--solid:hover { color: #04212a; transform: translateY(-1px); filter: brightness(1.06); }
.tv-btn--ghost { border-color: var(--tv-border); color: var(--tv-soft); background: rgba(255, 255, 255, 0.05); }
.tv-btn--ghost:hover { border-color: var(--tv-border-strong); color: #fff; }

/* ---------- Menús del header: "Sobre Tuvi" + chooser "Empezar gratis" ---------- */
.tv-menu { position: relative; }
.tv-menu > summary { list-style: none; cursor: pointer; }
.tv-menu > summary::-webkit-details-marker { display: none; }
.tv-menu > summary:focus-visible { outline: 2px solid var(--tv-cyan); outline-offset: 3px; border-radius: 999px; }

.tv-nav-trigger {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.9rem; color: var(--tv-soft); font-weight: 500; padding: 0.4rem 0;
}
.tv-nav-trigger::after {
  content: ""; width: 6px; height: 6px;
  border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px); transition: transform 0.2s ease;
}
.tv-nav-trigger:hover { color: #fff; }
.tv-menu[open] .tv-nav-trigger { color: #fff; }
.tv-menu[open] .tv-nav-trigger::after { transform: rotate(-135deg) translateY(2px); }

.tv-menu-panel {
  position: absolute; top: calc(100% + 12px); right: 0; z-index: 30;
  min-width: 240px; display: flex; flex-direction: column; gap: 2px; padding: 8px;
  background: rgba(9, 24, 36, 0.93); border: 1px solid var(--tv-border-strong);
  border-radius: 15px; backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 26px 60px -30px rgba(0, 0, 0, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  animation: tv-menu-in 0.16s ease;
}
@keyframes tv-menu-in { from { opacity: 0; transform: translateY(-7px); } to { opacity: 1; transform: none; } }
.tv-menu-panel a { color: var(--tv-soft); text-decoration: none; padding: 11px 13px; border-radius: 10px; font-size: 0.88rem; transition: background 0.16s ease, color 0.16s ease; }
.tv-menu-panel a:hover { background: rgba(40, 215, 232, 0.14); color: #fff; }

.tv-menu-panel--start { min-width: 302px; gap: 8px; padding: 10px; }
.tv-start-opt {
  display: block; padding: 13px 15px; border-radius: 12px; text-decoration: none;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--tv-border);
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}
.tv-start-opt:hover { border-color: var(--tv-border-strong); background: rgba(40, 215, 232, 0.1); transform: translateY(-1px); }
.tv-start-opt strong { display: block; font-family: var(--tv-display); font-size: 0.98rem; font-weight: 600; color: #fff; }
.tv-start-opt span { display: block; font-size: 0.76rem; color: var(--tv-dim); margin-top: 3px; line-height: 1.4; }
.tv-start-opt--primary { background: linear-gradient(120deg, var(--tv-cyan), #4aa8e6); border-color: transparent; box-shadow: 0 14px 30px -16px rgba(40, 215, 232, 0.8); }
.tv-start-opt--primary strong { color: #04212a; }
.tv-start-opt--primary span { color: rgba(4, 33, 42, 0.82); }

/* ---------- Eyebrow mono + HUD ---------- */
.tv-eyebrow {
  font-family: var(--tv-mono); font-size: 0.7rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--tv-cyan-soft); margin: 0 0 1rem;
}
.tv-crumbs { font-family: var(--tv-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--tv-dim); padding-top: 1.5rem; text-transform: uppercase; }
.tv-crumbs a { color: var(--tv-dim); }

/* ---------- Hero + secciones ---------- */
.tv-hero { padding: 5rem 0 2.5rem; }
.tv-hero h1 {
  font-family: var(--tv-display); font-weight: 700;
  font-size: clamp(2.1rem, 5.4vw, 3.7rem); line-height: 1.06; letter-spacing: -0.02em; margin: 0 0 1.15rem;
}
.tv-hero h1 span { color: var(--tv-cyan); }
.tv-lead { font-size: clamp(1.06rem, 2.1vw, 1.32rem); color: var(--tv-soft); max-width: 62ch; margin: 0 0 1.7rem; }

section { padding: 2.6rem 0; position: relative; z-index: 2; }
section h2 {
  font-family: var(--tv-display); font-weight: 700;
  font-size: clamp(1.55rem, 3.4vw, 2.3rem); line-height: 1.14; letter-spacing: -0.015em; margin: 0 0 0.9rem;
}
section h2 em { font-style: normal; color: var(--tv-cyan); }
section h3 { font-family: var(--tv-display); font-size: 1.2rem; margin: 0 0 0.5rem; font-weight: 600; }
section p { color: var(--tv-soft); max-width: 72ch; }
.tv-sub { color: var(--tv-dim); max-width: 68ch; }

/* ---------- Cards frost-glass ---------- */
.tv-grid { display: grid; gap: 1.15rem; margin: 1.8rem 0; }
.tv-grid-2 { grid-template-columns: repeat(2, 1fr); }
.tv-grid-3 { grid-template-columns: repeat(3, 1fr); }
.tv-card {
  background: var(--tv-panel); border: 1px solid var(--tv-border); border-radius: 1.15rem;
  padding: 1.5rem 1.45rem; backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: 0 24px 60px -44px rgba(0, 0, 0, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  position: relative; overflow: hidden; transition: border-color 0.2s ease, transform 0.2s ease;
}
.tv-card:hover { border-color: var(--tv-border-strong); transform: translateY(-2px); }
.tv-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--tv-cyan), transparent); opacity: 0.7;
}
.tv-card p { margin: 0.35rem 0 0; color: var(--tv-soft); font-size: 0.98rem; }
.tv-kicker { font-family: var(--tv-mono); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--tv-cyan-soft); }

/* ---------- Stats ---------- */
.tv-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
.tv-stat { background: var(--tv-panel); border: 1px solid var(--tv-border); border-radius: 1rem; padding: 1.3rem; text-align: center; backdrop-filter: blur(12px); }
.tv-stat b { display: block; font-family: var(--tv-display); font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; color: var(--tv-cyan); text-shadow: 0 0 24px rgba(40, 215, 232, 0.5); }
.tv-stat span { display: block; font-size: 0.82rem; color: var(--tv-dim); margin-top: 0.3rem; }

/* ---------- Steps ---------- */
ol.tv-steps { counter-reset: s; list-style: none; padding: 0; margin: 1.6rem 0; display: grid; gap: 0.8rem; }
ol.tv-steps li {
  counter-increment: s; position: relative; padding: 1rem 1.15rem 1rem 3.4rem;
  background: var(--tv-panel); border: 1px solid var(--tv-border); border-radius: 0.95rem; backdrop-filter: blur(10px);
}
ol.tv-steps li::before {
  content: counter(s, decimal-leading-zero); position: absolute; left: 1.15rem; top: 1rem;
  font-family: var(--tv-mono); font-weight: 600; color: var(--tv-cyan); font-size: 0.95rem;
}
ol.tv-steps li b { display: block; font-family: var(--tv-display); font-weight: 600; }
ol.tv-steps li span { color: var(--tv-soft); font-size: 0.96rem; }

/* ---------- Checks ---------- */
ul.tv-checks { list-style: none; padding: 0; margin: 1.2rem 0; display: grid; gap: 0.65rem; }
ul.tv-checks li { position: relative; padding-left: 1.8rem; color: var(--tv-soft); }
ul.tv-checks li::before { content: "→"; position: absolute; left: 0; color: var(--tv-cyan); font-weight: 700; }

/* ---------- FAQ ---------- */
.tv-faq { display: grid; gap: 0.9rem; margin: 1.8rem 0; }
.tv-faq details {
  background: var(--tv-panel); border: 1px solid var(--tv-border); border-radius: 0.95rem;
  padding: 0.35rem 1.25rem; backdrop-filter: blur(12px);
}
.tv-faq details[open] { border-color: var(--tv-border-strong); }
.tv-faq summary { cursor: pointer; font-family: var(--tv-display); font-weight: 600; padding: 0.95rem 0; list-style: none; color: #fff; }
.tv-faq summary::-webkit-details-marker { display: none; }
.tv-faq summary::after { content: "+"; float: right; color: var(--tv-cyan); font-weight: 700; font-family: var(--tv-mono); }
.tv-faq details[open] summary::after { content: "–"; }
.tv-faq details p { margin: 0 0 1.1rem; color: var(--tv-soft); }

/* ---------- CTA band ---------- */
.tv-cta {
  margin: 3.4rem 0 1rem; padding: 2.8rem 2rem; text-align: center; border-radius: 1.4rem;
  background: linear-gradient(120deg, rgba(9, 34, 52, 0.72), rgba(12, 58, 74, 0.6));
  border: 1px solid var(--tv-border); backdrop-filter: blur(16px);
  box-shadow: 0 34px 80px -50px rgba(0, 0, 0, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  position: relative; overflow: hidden;
}
.tv-cta::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 1px; background: linear-gradient(90deg, transparent, var(--tv-cyan), transparent); }
.tv-cta h2 { margin: 0 0 0.6rem; }
.tv-cta p { color: var(--tv-soft); max-width: 56ch; margin: 0 auto 1.6rem; }
.tv-cta-row { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.tv-foot { border-top: 1px solid rgba(180, 236, 250, 0.14); margin-top: 3.5rem; padding: 2.8rem 0; color: var(--tv-dim); font-size: 0.9rem; position: relative; z-index: 2; }
.tv-foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 1.5rem; }
.tv-foot-grid h4 { font-family: var(--tv-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--tv-cyan-soft); margin: 0 0 0.7rem; }
.tv-foot-grid a { display: block; color: var(--tv-dim); padding: 0.22rem 0; }
.tv-foot-grid a:hover { color: #fff; }
.tv-foot-legal { margin-top: 2rem; padding-top: 1.3rem; border-top: 1px solid rgba(180, 236, 250, 0.1); font-size: 0.8rem; color: var(--tv-dim); font-family: var(--tv-mono); letter-spacing: 0.04em; }

@media (max-width: 780px) {
  body { font-size: 16px; }
  .tv-grid-2, .tv-grid-3, .tv-foot-grid { grid-template-columns: 1fr; }
  .tv-hero { padding: 3.2rem 0 1.5rem; }
  .tv-bg { opacity: 0.8; }
}

/* Header y menús en móvil: marca compacta, panel anclado al viewport */
@media (max-width: 560px) {
  .tv-brand em { display: none; }
  .tv-nav { gap: 0.7rem; }
  .tv-head .wrap { gap: 0.6rem; }
  .tv-menu-panel { position: fixed; top: 72px; left: 14px; right: 14px; min-width: 0; }
  .tv-stats { gap: 0.55rem; }
  .tv-stat { padding: 1rem 0.5rem; }
  .tv-stat b { font-size: 1.5rem; }
}