/* Varipra — tokens, base y estructura general.
   Paleta "Índigo y ámbar" con modo claro, oscuro y automático. */

:root {
  color-scheme: light;

  --bg: #f5f6fb;
  --bg-soft: #eaeef9;
  --surface: #ffffff;
  --surface-2: #f4f6fc;
  --surface-3: #e9edf8;
  --ink: #101527;
  --ink-soft: #2b3246;
  --muted: #5e6578;
  --faint: #868da2;
  --line: #e3e6f1;
  --line-strong: #ccd2e3;

  --accent: #4b45d6;
  --accent-strong: #3a34b4;
  --accent-ink: #ffffff;
  --accent-soft: #eceafd;
  --accent-line: #c9c6f7;
  --accent-ring: #4b45d63d;

  --warm: #a85f06;
  --warm-soft: #fdf1dc;
  --warm-line: #f0d6a8;

  --shadow-sm: 0 1px 2px #10152710, 0 10px 26px #1015270a;
  --shadow-md: 0 16px 44px #1015271f;
  --shadow-lg: 0 34px 96px #1015272e;
  --backdrop: #0b0f1c8c;

  --radius: 14px;
  --radius-sm: 9px;
  --gutter: clamp(20px, 7vw, 116px);
  --mono: "DM Mono", ui-monospace, monospace;
  --sans: Manrope, system-ui, "Segoe UI", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #080a12;
    --bg-soft: #0e1220;
    --surface: #121623;
    --surface-2: #181d2d;
    --surface-3: #1f2539;
    --ink: #eef0f8;
    --ink-soft: #d3d8e8;
    --muted: #99a1b8;
    --faint: #7d859c;
    --line: #232940;
    --line-strong: #333b57;

    --accent: #8f8aff;
    --accent-strong: #a9a5ff;
    --accent-ink: #0b0d18;
    --accent-soft: #1d2142;
    --accent-line: #343a6d;
    --accent-ring: #8f8aff4d;

    --warm: #f1b35d;
    --warm-soft: #2a2014;
    --warm-line: #4a3a21;

    --shadow-sm: 0 1px 2px #00000052, 0 10px 26px #0000003d;
    --shadow-md: 0 16px 44px #00000066;
    --shadow-lg: 0 34px 96px #00000080;
    --backdrop: #04060db8;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #080a12;
  --bg-soft: #0e1220;
  --surface: #121623;
  --surface-2: #181d2d;
  --surface-3: #1f2539;
  --ink: #eef0f8;
  --ink-soft: #d3d8e8;
  --muted: #99a1b8;
  --faint: #7d859c;
  --line: #232940;
  --line-strong: #333b57;

  --accent: #8f8aff;
  --accent-strong: #a9a5ff;
  --accent-ink: #0b0d18;
  --accent-soft: #1d2142;
  --accent-line: #343a6d;
  --accent-ring: #8f8aff4d;

  --warm: #f1b35d;
  --warm-soft: #2a2014;
  --warm-line: #4a3a21;

  --shadow-sm: 0 1px 2px #00000052, 0 10px 26px #0000003d;
  --shadow-md: 0 16px 44px #00000066;
  --shadow-lg: 0 34px 96px #00000080;
  --backdrop: #04060db8;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

h1, h2, h3, h4 { font-weight: 700; letter-spacing: -.02em; }
a { color: inherit; }

/* ---------- Barra superior ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 70px;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 var(--gutter);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.04em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  background: linear-gradient(140deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--warm)));
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  border-radius: 10px 10px 10px 3px;
  box-shadow: 0 6px 18px var(--accent-ring);
}

.brand-dot { color: var(--accent); }

.topbar nav { display: flex; gap: 26px; margin-left: auto; }

.topbar nav a {
  position: relative;
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: none;
  color: var(--muted);
  padding: 4px 0;
  transition: color .18s;
}

.topbar nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: right .22s ease;
}

.topbar nav a:hover { color: var(--ink); }
.topbar nav a:hover::after { right: 0; }

.topbar-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink-soft);
  transition: border-color .18s, background .18s, transform .18s;
}

.theme-toggle:hover { border-color: var(--accent-line); color: var(--accent); transform: translateY(-1px); }
.theme-toggle svg { width: 17px; height: 17px; }

.theme-toggle i {
  position: absolute;
  right: 5px;
  bottom: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.top-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 700;
  text-decoration: none;
  color: var(--accent-ink);
  background: var(--accent);
  padding: 11px 16px;
  border-radius: 10px;
  transition: background .18s, transform .18s, box-shadow .18s;
}

.top-cta:hover { background: var(--accent-strong); transform: translateY(-1px); box-shadow: 0 10px 24px var(--accent-ring); }

/* ---------- Elementos compartidos ---------- */

.eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  font: 10px var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow.muted { color: var(--faint); }
.eyebrow-line { display: inline-block; width: 28px; height: 1px; background: var(--line-strong); }

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-ring);
}

.section-pad { padding-left: var(--gutter); padding-right: var(--gutter); }

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.section-heading h2 { font-size: clamp(27px, 3.4vw, 40px); margin: 14px 0 0; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font: 9.5px var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  padding: 7px 11px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- Portada ---------- */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 50px;
  padding: clamp(46px, 6vw, 86px) var(--gutter) clamp(50px, 6vw, 84px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -30% 38% 18% -22%;
  background: radial-gradient(circle at 50% 50%, var(--accent-ring), transparent 62%);
  opacity: .55;
  pointer-events: none;
}

.hero-copy { position: relative; }

.hero h1 {
  font-size: clamp(38px, 5.4vw, 66px);
  line-height: 1.05;
  letter-spacing: -.045em;
  margin: 22px 0 18px;
  font-weight: 800;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(104deg, var(--accent) 15%, color-mix(in srgb, var(--accent) 72%, var(--warm)));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.intro { color: var(--muted); max-width: 440px; font-size: 15px; line-height: 1.75; margin: 0; }

.hero-buttons { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 26px; }

.primary-btn, .ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 15px 20px;
  border-radius: 11px;
  transition: transform .18s, background .18s, box-shadow .18s, border-color .18s, color .18s;
}

.primary-btn {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 12px 30px var(--accent-ring);
}

.primary-btn:hover { background: var(--accent-strong); transform: translateY(-2px); }

.ghost-btn {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.ghost-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-stats div { display: flex; flex-direction: column; gap: 4px; }
.hero-stats b { font-size: 21px; letter-spacing: -.03em; }
.hero-stats span { font: 9.5px var(--mono); letter-spacing: .09em; text-transform: uppercase; color: var(--faint); }

/* Composición decorativa de la portada */

.hero-art { position: relative; display: grid; place-items: center; min-height: 360px; }

.art-window {
  width: min(100%, 420px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transform: rotate(-1.4deg);
}

.art-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.art-bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.art-bar i:first-child { background: var(--accent); }
.art-bar span { margin-left: auto; font: 8.5px var(--mono); letter-spacing: .1em; color: var(--faint); }

.art-screen {
  display: grid;
  place-items: center;
  height: 176px;
  background:
    radial-gradient(circle at 30% 20%, var(--accent-ring), transparent 55%),
    linear-gradient(150deg, var(--surface-2), var(--surface-3));
}

.art-play {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 18px;
  padding-left: 4px;
  box-shadow: 0 14px 34px var(--accent-ring);
  animation: pulse 3.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 14px 34px var(--accent-ring); }
  50% { box-shadow: 0 14px 34px var(--accent-ring), 0 0 0 16px color-mix(in srgb, var(--accent) 10%, transparent); }
}

.art-rows { display: grid; gap: 9px; padding: 16px; }
.art-rows i { display: block; height: 9px; border-radius: 5px; background: var(--surface-3); }
.art-rows i:nth-child(1) { width: 72%; background: var(--accent-soft); }
.art-rows i:nth-child(2) { width: 54%; }
.art-rows i:nth-child(3) { width: 38%; }

.art-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  border-radius: 999px;
  padding: 9px 13px;
  font: 9.5px var(--mono);
  letter-spacing: .08em;
  color: var(--ink-soft);
}

.art-chip b { color: var(--accent); font-family: var(--sans); font-size: 10px; }
.chip-one { top: 6%; right: -2%; }
.chip-two { bottom: 10%; left: -4%; }

/* ---------- Guía de instalación ---------- */

.install-guide { padding-top: 76px; padding-bottom: 86px; background: var(--bg-soft); }
.guide-intro { max-width: 290px; color: var(--muted); font-size: 13px; line-height: 1.8; margin: 0; }

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 38px;
}

.guide-grid details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 20px;
  transition: border-color .18s, box-shadow .18s;
}

.guide-grid details[open] { border-color: var(--accent-line); box-shadow: var(--shadow-sm); }

.guide-grid summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  font-size: 13px;
  font-weight: 700;
  list-style: none;
}

summary::-webkit-details-marker { display: none; }

.guide-grid summary span {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 9px var(--mono);
}

.guide-grid summary b { margin-left: auto; color: var(--accent); font-size: 18px; font-weight: 400; transition: transform .2s; }
.guide-grid details[open] summary b { transform: rotate(45deg); }
.guide-grid details p { color: var(--muted); font-size: 12.5px; line-height: 1.85; margin: 0 0 18px; padding-left: 39px; }

/* ---------- Verificación ---------- */

.security {
  display: grid;
  grid-template-columns: 58px 1fr auto;
  gap: 28px;
  align-items: center;
  padding-top: 62px;
  padding-bottom: 62px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.security-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent);
  font-size: 23px;
}

.security h2 { font-size: clamp(24px, 2.8vw, 32px); max-width: 480px; margin: 14px 0 12px; }
.security p { color: var(--muted); line-height: 1.8; font-size: 13px; max-width: 590px; margin: 0 0 18px; }

.checksum-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  padding: 11px 15px;
  border-radius: 10px;
  transition: background .18s, transform .18s;
}

.checksum-link:hover { background: color-mix(in srgb, var(--accent) 14%, var(--surface)); transform: translateY(-1px); }

.security-aside {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding-left: 28px;
  border-left: 1px solid var(--line);
  color: var(--faint);
  font: 8.5px var(--mono);
  letter-spacing: .1em;
  text-align: center;
}

.aside-mark { font: 800 26px var(--sans); color: var(--accent); letter-spacing: -.04em; }

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

footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  padding: 52px var(--gutter) 40px;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}

footer p { color: var(--muted); font-size: 12px; line-height: 1.8; max-width: 300px; margin: 14px 0 0; }
footer h3 { font: 9.5px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--faint); margin: 0 0 14px; }
footer ul { list-style: none; display: grid; gap: 10px; margin: 0; padding: 0; }
footer ul a { font-size: 12.5px; color: var(--muted); text-decoration: none; }
footer ul a:hover { color: var(--accent); }

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  font: 9.5px var(--mono);
  letter-spacing: .08em;
  color: var(--faint);
}

/* ---------- Adaptación a pantallas pequeñas ---------- */

@media (max-width: 1040px) {
  .hero { grid-template-columns: 1fr; gap: 10px; }
  .hero-art { grid-row: 1; min-height: 290px; margin-bottom: 14px; }
  .art-window { max-width: 400px; }
  .security { grid-template-columns: 54px 1fr; }
  .security-aside { display: none; }
  footer { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 70px; }
  .topbar { height: 62px; gap: 12px; }
  .topbar nav { display: none; }
  .topbar-actions { margin-left: auto; }
  .top-cta { padding: 10px 13px; font-size: 11.5px; }
  .hero-stats { gap: 16px 24px; }
  .hero-stats b { font-size: 18px; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-intro { max-width: 100%; }
  .install-guide .section-heading { flex-direction: column; align-items: flex-start; gap: 14px; }
  footer { grid-template-columns: 1fr; gap: 28px; }
  .chip-one { top: 20%; right: 0; }
  .chip-two { bottom: 14%; left: 0; }
}

@media (max-width: 420px) {
  .brand { font-size: 17px; }
  .hero-buttons .primary-btn, .hero-buttons .ghost-btn { flex: 1 1 100%; justify-content: space-between; }
}