/* Ventus — la web. Los colores son los de la app (crates/ventus-ui/src/tema.rs): fondo casi negro y violeta en
   oscuro, blanco y violeta más hondo en claro. Inter, la misma letra de respaldo de la app, servida desde aquí. */

@font-face {
  font-family: "Inter";
  src: url("../fonts/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --surface: #faf9fc;
  --surface-2: #f3f1f8;
  --border: #e6e2ee;
  --border-strong: #d4cee0;
  --text: #16141c;
  --muted: #5d5869;
  --accent: #6d3fd4;
  --accent-hover: #5f31c4;
  --accent-text: #5f31c4;
  --accent-soft: #efe9fd;
  --on-accent: #ffffff;
  --bar-other: #c9c4d4;
  --shadow: 0 1px 2px rgba(22, 20, 28, .06), 0 10px 24px -8px rgba(22, 20, 28, .14), 0 28px 48px -20px rgba(22, 20, 28, .16);
  --radius: 12px;
  --radius-sm: 8px;
  --wrap: 1180px;
  --gutter: 24px;
  --header: 64px;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0b0a0e;
  --surface: #121117;
  --surface-2: #19171f;
  --border: #26232f;
  --border-strong: #363241;
  --text: #eeebf5;
  --muted: #a39fb1;
  --accent: #8550e0;
  --accent-hover: #6f3fd0;
  --accent-text: #b69cff;
  --accent-soft: #261d40;
  --on-accent: #ffffff;
  --bar-other: #3b3746;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 24px -8px rgba(0, 0, 0, .5), 0 28px 48px -20px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Lo que el navegador pinta por su cuenta, también con la marca. */
::selection { background: var(--accent-soft); color: var(--text); }
:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; border-radius: 4px; }
html { scrollbar-color: var(--border-strong) var(--bg); }
a { color: var(--accent-text); text-underline-offset: .2em; text-decoration-thickness: 1px; }

img, svg { display: block; max-width: 100%; }
h1, h2, h3 { margin: 0; font-weight: 650; letter-spacing: -0.025em; line-height: 1.1; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.muted { color: var(--muted); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.skip {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--accent); color: var(--on-accent); padding: 10px 14px; border-radius: var(--radius-sm);
  text-decoration: none; transition: top .15s var(--ease-out);
}
.skip:focus { top: 12px; }

/* --- Botones --------------------------------------------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 20px; border-radius: 10px;
  font: inherit; font-size: 16px; font-weight: 560; line-height: 1;
  text-decoration: none; cursor: pointer; border: 1px solid transparent; white-space: nowrap;
  transition: background-color .16s var(--ease-out), border-color .16s var(--ease-out), transform .12s var(--ease-out);
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--surface-2); }
.btn-small { min-height: 36px; padding: 0 14px; font-size: 14.5px; border-radius: 8px; }
.btn[aria-disabled="true"] { opacity: .55; pointer-events: none; }

.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px;
  background: transparent; border: 1px solid transparent; color: var(--muted); cursor: pointer;
  transition: background-color .16s var(--ease-out), color .16s var(--ease-out);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn svg { width: 19px; height: 19px; }

/* --- Cabecera -------------------------------------------------------------------------------------------- */

.site-header {
  position: sticky; top: 12px; z-index: 50; height: var(--header); margin-top: 12px;
  padding-inline: var(--gutter); pointer-events: none;
}
.site-header .wrap {
  height: 100%; display: flex; align-items: center; gap: 24px; pointer-events: auto;
  padding-inline: 14px 10px; border-radius: 18px;
  background: color-mix(in srgb, var(--bg) 52%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(170%); backdrop-filter: blur(18px) saturate(170%);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 9%, transparent), 0 12px 32px -14px rgba(0, 0, 0, .45);
  transition: background-color .2s var(--ease-out), border-color .2s var(--ease-out);
}
.site-header.scrolled .wrap { background: color-mix(in srgb, var(--bg) 66%, transparent); border-color: color-mix(in srgb, var(--text) 14%, transparent); }
.nav a[aria-current="page"] { color: var(--text); }
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header .wrap { background: var(--bg); }
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 650; font-size: 19px; letter-spacing: -0.02em; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; padding: 8px 12px; border-radius: 8px; transition: color .15s, background-color .15s; }
.nav a:hover { color: var(--text); background: var(--surface-2); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }

@media (max-width: 860px) {
  .nav { display: none; }
}

/* --- Secciones ------------------------------------------------------------------------------------------- */

section { padding: 112px 0; }

/* --- Pantalla partida: el escaneado y el mismo papel en Editar, que avanzan juntos al bajar ------------------ */

/* Escenas (sitio.js): la sección fija un tramo del scroll; --pa lleva el título y --pb, un 15 % por detrás, lo que
   enseña. Nada parte de invisible: llega desde abajo y algo apagado. Sin la clase .escenas, todo quieto. */
.escenas main > section.fija { padding-bottom: 0; box-sizing: border-box; }
.escenas main > section.fija > .escena-pin { position: sticky; padding: 0; }
.escenas [data-mueve] { will-change: transform, opacity; }
.escenas [data-mueve="a"] { transform: translateY(calc((1 - var(--pa, 1)) * 48px)); opacity: calc(.4 + .6 * var(--pa, 1)); }
.escenas [data-mueve="a"] h2 { color: color-mix(in srgb, var(--text) calc(35% + 65% * var(--pa, 1)), var(--muted)); }
.escenas [data-mueve="b"] { transform: translateY(calc((1 - var(--pb, 1)) * 96px)) scale(calc(.965 + .035 * var(--pb, 1))); opacity: calc(.35 + .65 * var(--pb, 1)); }
#partida .partida-pin { padding: 0; }
.partida-panes { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
.partida-pane { position: relative; margin: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 14px; background: #fff; box-shadow: var(--shadow); aspect-ratio: 780 / 420; }
.partida-pane img { display: block; width: 100%; height: auto; }
.escenas .partida-pane img { will-change: transform; }
.escenas .partida-pane img.a { transform: translateY(calc((1 - var(--pa, 1)) * 38%)); opacity: calc(.35 + .65 * var(--pa, 1)); }
.escenas .partida-pane img.b { transform: translateY(calc((1 - var(--pb, 1)) * 38%)); opacity: calc(.35 + .65 * var(--pb, 1)); }
.partida-pane .tag {
  position: absolute; top: 12px; inset-inline-end: 12px; z-index: 1; padding: 5px 11px; border-radius: 999px;
  font-size: 13px; font-weight: 560; line-height: 1; color: #fff; background: rgba(22, 20, 28, .78);
}
.partida-pane .tag-accent { background: var(--accent); }
section + section { border-top: 1px solid var(--border); }
.section-head { max-width: 720px; }
.section-head h2 { font-size: clamp(32px, 4.2vw, 48px); }
.section-head p { margin-top: 18px; font-size: 19px; color: var(--muted); max-width: 62ch; }
.center { text-align: center; margin-left: auto; margin-right: auto; }
.center p { margin-left: auto; margin-right: auto; }

/* El marco de las capturas: la ventana de la app tal cual, con su borde y una sombra que la levanta. */
.shot {
  margin: 0; border-radius: var(--radius); overflow: hidden; background: var(--surface);
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.shot img { width: 100%; height: auto; }
.shot-3d { max-width: 820px; margin: 48px auto 0; }
.only-dark { display: none !important; }
:root[data-theme="dark"] .only-dark { display: block !important; }
:root[data-theme="dark"] .only-light { display: none !important; }

/* --- Hero ------------------------------------------------------------------------------------------------ */

.hero { padding: 96px 0 0; border-top: 0; overflow: hidden; }
.hero-copy { text-align: center; max-width: 860px; margin: 0 auto; }
.hero h1 { font-size: clamp(40px, 6.4vw, 76px); letter-spacing: -0.035em; line-height: 1.02; }
.hero .sub { margin: 24px auto 0; font-size: clamp(18px, 2vw, 21px); color: var(--muted); max-width: 640px; }
.hero .fact { margin-top: 20px; font-size: 15.5px; font-weight: 560; color: var(--accent-text); }
.hero .actions { margin-top: 32px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .shot { margin: 72px auto 0; max-width: 1120px; border-bottom-left-radius: 0; border-bottom-right-radius: 0; border-bottom: 0; }

[data-enter] { animation: enter .7s var(--ease-out) both; }
[data-enter="2"] { animation-delay: .08s; }
[data-enter="3"] { animation-delay: .16s; }
[data-enter="4"] { animation-delay: .26s; }
@keyframes enter { from { transform: translateY(10px); filter: blur(5px); } to { transform: none; filter: none; } }

/* --- Velocidad: la gráfica ------------------------------------------------------------------------------- */

.speed-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.facts { display: flex; gap: 40px; margin-top: 40px; }
.facts .n { font-size: 44px; font-weight: 680; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.facts .d { margin-top: 8px; font-size: 15px; color: var(--muted); max-width: 26ch; }
.chart { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.chart h3 { font-size: 15px; font-weight: 600; letter-spacing: 0; color: var(--muted); }
.legend { display: flex; gap: 18px; margin-top: 14px; font-size: 14px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.legend .v { background: var(--accent); }
.legend .o { background: var(--bar-other); }
.bars { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 22px; }
.bars li { display: grid; gap: 7px; }
.bars .label { font-size: 15px; font-weight: 520; display: flex; justify-content: space-between; }
.bars .label b { font-weight: 600; font-variant-numeric: tabular-nums; color: var(--accent-text); }
.bar { height: 10px; border-radius: 99px; background: var(--bar-other); position: relative; overflow: hidden; }
.bar.ventus { background: transparent; }
.bar.ventus::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: calc(var(--w) * 100%); border-radius: 99px; background: var(--accent);
  transform-origin: left; transition: transform 1.1s var(--ease-out);
}
.chart:not(.seen) .bar.ventus::before { transform: scaleX(0); }
.chart .note { margin-top: 22px; font-size: 13.5px; color: var(--muted); }

/* --- Funciones a dos columnas ---------------------------------------------------------------------------- */

.feature { display: grid; grid-template-columns: 1fr 1.35fr; gap: 64px; align-items: center; }
.feature.flip { grid-template-columns: 1.35fr 1fr; }
.feature.flip .feature-copy { order: 2; }
.feature-copy h2 { font-size: clamp(30px, 3.6vw, 42px); }
.feature-copy p { margin-top: 18px; font-size: 18.5px; color: var(--muted); max-width: 46ch; }

/* --- Para leer ------------------------------------------------------------------------------------------- */

.reading-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 56px; }
.reading-grid article h3 { margin-top: 24px; font-size: 21px; letter-spacing: -0.015em; }
.reading-grid article p { margin-top: 10px; color: var(--muted); font-size: 16.5px; }
.reading-grid .shot { aspect-ratio: 4 / 3; }
.reading-grid .shot img { height: 100%; object-fit: cover; object-position: var(--pos, 50% 50%); }

/* --- El resto de herramientas ---------------------------------------------------------------------------- */

.tools { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px 32px; margin-top: 56px; list-style: none; padding: 0; }
.tools svg { width: 22px; height: 22px; color: var(--accent-text); }
.tools h3 { margin-top: 14px; font-size: 17px; letter-spacing: -0.01em; }
.tools p { margin-top: 6px; font-size: 15px; color: var(--muted); }

/* --- Comparativa ----------------------------------------------------------------------------------------- */

.table-wrap { margin-top: 48px; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.compare { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 15.5px; }
.compare th, .compare td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.compare tr:last-child th, .compare tr:last-child td { border-bottom: 0; }
.compare thead th { font-size: 14px; font-weight: 600; color: var(--muted); background: var(--surface); }
.compare tbody th { font-weight: 500; color: var(--muted); width: 26%; }
.compare .us { background: var(--accent-soft); color: var(--text); font-weight: 600; }
.compare thead .us { color: var(--accent-text); }
.compare .yes, .compare .no { display: inline-flex; align-items: center; gap: 6px; }
.compare .yes svg, .compare .no svg { width: 16px; height: 16px; }
.compare .yes svg { color: var(--accent-text); }
.compare .no { color: var(--muted); }
.fine { margin-top: 16px; font-size: 13.5px; color: var(--muted); }

/* --- Nativa ---------------------------------------------------------------------------------------------- */

.checks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; font-size: 16.5px; }
.checks svg { width: 20px; height: 20px; color: var(--accent-text); flex: none; margin-top: 3px; }

/* --- Precio ---------------------------------------------------------------------------------------------- */

.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; max-width: 880px; margin-left: auto; margin-right: auto; }
.plan { border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; background: var(--surface); }
.plan.launch { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); background: var(--accent-soft); }
.plan h3 { font-size: 16px; font-weight: 600; letter-spacing: 0; color: var(--muted); }
.plan .big { margin-top: 12px; font-size: 56px; font-weight: 700; letter-spacing: -0.04em; line-height: 1; }
.plan p { margin-top: 14px; color: var(--muted); font-size: 16px; }
.price-status { margin-top: 32px; text-align: center; font-size: 16px; font-weight: 560; color: var(--accent-text); font-variant-numeric: tabular-nums; min-height: 1.6em; }
.price-actions { margin-top: 16px; display: flex; justify-content: center; }
.currency-note { margin: 10px auto 0; max-width: 560px; text-align: center; font-size: 13.5px; color: var(--muted); }

/* --- Descargas ------------------------------------------------------------------------------------------- */

.downloads { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.os { border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 10px; background: var(--surface); transition: border-color .2s var(--ease-out); }
.os.current { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); }
.os h3 { font-size: 22px; }
.os .req { color: var(--muted); font-size: 15px; }
.os .btns { margin-top: auto; padding-top: 18px; display: grid; gap: 10px; }
.os .btns .btn { width: 100%; }
.os .file { font-size: 13.5px; color: var(--muted); text-align: center; }
.first-open { margin: 40px auto 0; max-width: 760px; padding: 20px 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); font-size: 15px; color: var(--muted); }
.first-open b { color: var(--text); font-weight: 600; }

/* --- Preguntas ------------------------------------------------------------------------------------------- */

.faq { max-width: 780px; margin: 48px auto 0; }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 0; display: flex; justify-content: space-between; gap: 16px;
  font-size: 18px; font-weight: 560;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { width: 20px; height: 20px; color: var(--muted); flex: none; transition: transform .2s var(--ease-out); margin-top: 3px; }
.faq details[open] summary svg { transform: rotate(180deg); }
.faq .answer { padding: 0 0 24px; color: var(--muted); font-size: 16.5px; max-width: 68ch; }

/* --- Etiquetas de sección, versión, principios y llamada final ------------------------------------------ */

.volver { margin-bottom: 20px; font-size: 14.5px; font-weight: 500; }
.volver a, .doc .volver a { color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; transition: color .15s var(--ease-out); }
.volver a:hover, .doc .volver a:hover { color: var(--text); }
.volver svg.flip { width: 14px; height: 14px; transform: scaleX(-1); }
[dir="rtl"] .volver svg.flip { transform: none; }
.hero-meta {
  margin-top: 18px; font: 500 12.5px/1.4 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; letter-spacing: .04em;
  color: var(--muted);
}

.principles {
  list-style: none; padding: 0; margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border); border-left: 1px solid var(--border);
}
.principles li { position: relative; padding: 32px 28px 36px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.principles svg { width: 22px; height: 22px; color: var(--accent-text); }
.principles h3 { margin-top: 16px; font-size: 18px; letter-spacing: -0.01em; }
.principles p { margin-top: 8px; font-size: 15px; color: var(--muted); }

.cta { text-align: center; padding: 128px 0; background: radial-gradient(60% 80% at 50% 100%, var(--accent-soft), transparent 70%); }
.cta h2 { font-size: clamp(32px, 4.6vw, 52px); max-width: 18ch; margin: 0 auto; }
.cta p { margin-top: 16px; font-size: 18px; color: var(--muted); }
.cta .btn { margin-top: 32px; }

/* --- Pie ------------------------------------------------------------------------------------------------- */

.site-footer { border-top: 1px solid var(--border); padding: 72px 0 40px; font-size: 14.5px; color: var(--muted); }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand p { margin-top: 14px; max-width: 30ch; }
.foot-brand .lang-select { margin-top: 22px; }
.site-footer nav { display: flex; flex-direction: column; gap: 10px; }
.site-footer nav h2 {
  font: 600 12px/1.4 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text); margin-bottom: 6px;
}
.site-footer a { color: var(--muted); text-decoration: none; transition: color .15s var(--ease-out); }
.site-footer a:hover { color: var(--text); }
.foot-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 8px 32px; justify-content: space-between; }
.lang-select { display: inline-flex; align-items: center; gap: 8px; }
.lang-select svg { width: 17px; height: 17px; }
.lang-select select {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: 8px; padding: 8px 32px 8px 12px; appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23888' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
.credits { font-size: 13px; }

/* --- Página de texto (privacidad, condiciones, 404) ------------------------------------------------------ */

.doc { padding: 96px 0; border-top: 0; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(34px, 5vw, 52px); }
.doc h2 { font-size: 22px; margin-top: 40px; letter-spacing: -0.01em; }
.doc p, .doc li { margin-top: 14px; color: var(--muted); font-size: 17px; }
.doc .lead { font-size: 19px; }
.doc ul { padding-inline-start: 22px; }
.doc a { color: var(--accent-text); }
.doc .actualizado { font-size: 14px; }
.nota-doc { margin-top: 20px; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); font-size: 15px; }
.nota-doc.aviso { border-color: color-mix(in srgb, #f5a524 45%, var(--border)); }
mark.pendiente { background: color-mix(in srgb, #f5a524 22%, transparent); color: var(--text); padding: 1px 6px; border-radius: 4px; font-size: .9em; }
.datos { display: grid; grid-template-columns: max-content 1fr; gap: 10px 24px; margin-top: 24px; font-size: 17px; }
.datos dt { color: var(--text); font-weight: 600; }
.datos dd { margin: 0; color: var(--muted); }
.doc-cuerpo pre { margin-top: 16px; padding: 16px; overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 12.5px; color: var(--muted); }
.doc-cuerpo pre code { white-space: pre-wrap; }

.buzon { margin-top: 40px; display: grid; gap: 24px; }
.buzon fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.buzon legend { font-weight: 600; margin-bottom: 12px; color: var(--text); }
.buzon .opcion { cursor: pointer; }
.buzon .opcion input { position: absolute; opacity: 0; pointer-events: none; }
.buzon .opcion span {
  display: inline-block; padding: 9px 16px; border: 1px solid var(--border-strong); border-radius: 999px; font-size: 15px; color: var(--muted);
  transition: border-color .15s var(--ease-out), color .15s var(--ease-out), background-color .15s var(--ease-out);
}
.buzon .opcion input:checked + span { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }
.buzon .opcion input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.buzon .campo { display: grid; gap: 8px; }
.buzon .campo > span { font-weight: 600; color: var(--text); }
.buzon textarea, .buzon input[type="email"] {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 12px 14px; width: 100%; resize: vertical;
}
.buzon textarea:focus, .buzon input[type="email"]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.buzon small { color: var(--muted); font-size: 13.5px; }
.buzon .casilla { display: flex; gap: 10px; align-items: flex-start; color: var(--muted); font-size: 15px; }
.buzon .casilla input { margin-top: 4px; accent-color: var(--accent); width: 16px; height: 16px; }
.buzon .enviar { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.buzon .estado { color: var(--muted); font-size: 15px; }
.buzon button[disabled] { opacity: .55; cursor: not-allowed; }

/* --- Pantallas medianas y pequeñas ----------------------------------------------------------------------- */

@media (max-width: 980px) {
  .principles { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 88px 0; }
  .speed-grid, .feature, .feature.flip { grid-template-columns: 1fr; gap: 40px; }
  .feature.flip .feature-copy { order: 0; }
  .reading-grid { grid-template-columns: 1fr; gap: 48px; max-width: 640px; }
  .tools { grid-template-columns: repeat(2, 1fr); }
  .downloads { grid-template-columns: 1fr; max-width: 520px; margin-left: auto; margin-right: auto; }
}

@media (max-width: 600px) {
  .principles { grid-template-columns: 1fr; }
  .partida-panes { grid-template-columns: 1fr; gap: 16px; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta { padding: 88px 0; }
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  section { padding: 72px 0; }
  .hero { padding-top: 56px; }
  .hero .actions .btn { width: 100%; }
  .hero .shot { margin-top: 48px; }
  .facts { gap: 28px; flex-wrap: wrap; }
  .tools { grid-template-columns: 1fr; gap: 28px; }
  .price-grid { grid-template-columns: 1fr; }
  .header-actions .btn { display: none; }
  .lang-select { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .chart:not(.seen) .bar.ventus::before { transform: none; }
}

/* Árabe: el diseño se refleja solo (dir=rtl); lo que lleva dirección se corrige aquí. */
[dir="rtl"] .bar.ventus::before { inset: 0 0 0 auto; transform-origin: right; }
[dir="rtl"] .lang-select { margin-left: 0; margin-right: auto; }
[dir="rtl"] .nav { margin-left: 0; margin-right: 8px; }
[dir="rtl"] .header-actions { margin-left: 0; margin-right: auto; }
[dir="rtl"] .lang-select select { padding: 8px 12px 8px 32px; background-position: left 10px center; }