:root {
  --bg: #0f1216;
  --bg-alt: #181d23;
  --text: #e6e9ed;
  --text-dim: #b3bbc4;
  --accent: #3aa8ff;
  --accent-hover: #68c4ff;
  --danger: #ff4d5d;
  --radius: 12px;
  --font-stack: system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;
  --max-width: 1000px;
  --gradient: radial-gradient(circle at 30% 20%, #203040, #0f1216 70%);
  --surface: #161c22;
  --border: #242c33;
  --accent-glow: 180 100% 55%;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  background: var(--gradient);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3 {
  line-height: 1.2;
  font-weight: 600;
}

p,li {
  max-width: 72ch;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover,
a:focus {
  text-decoration: underline;
}

.site-header {
  padding: clamp(1.5rem,4vw,3rem) 1.5rem 0;
  text-align: center;
}

.branding h1 {
  margin: 0;
  font-size: clamp(2rem,6vw,3.2rem);
  background: linear-gradient(90deg,#3aa8ff,#7ed6ff 60%,#b0e9ff);
  -webkit-background-clip: text;
  color: transparent;
}

.by-matrix {
  font-size: 0.6em;
  font-weight: 500;
  letter-spacing: 0.5px;
  background: none;
  color: var(--accent);
}

.tagline {
  margin: 0.5rem auto 0;
  font-size: clamp(1rem,2.4vw,1.25rem);
  color: var(--text-dim);
}

.hero {
  display: grid;
  gap: 2.5rem;
  align-items: stretch;
  grid-template-columns: minmax(0,1fr) minmax(0,0.6fr);
  padding: 3rem clamp(1.2rem,3.2vw,2rem) 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-text {
  max-width: var(--max-width);
  background: linear-gradient(145deg,var(--bg-alt),#12171d);
  padding: clamp(1.5rem,3vw,2.5rem);
  border: 1px solid #252c33;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px -8px rgba(0,0,0,0.6),0 0 0 1px rgba(255,255,255,0.02) inset;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-text .mini-intro {
  margin-top: .9rem;
  font-size: .9rem;
  color: var(--text-dim);
}

.hero-art {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  isolation: isolate;
}

.hero-art .orb {
  width: clamp(200px,50%,320px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%,rgba(58,168,255,0.9),rgba(58,168,255,0.15) 60%,transparent 70%),
    radial-gradient(circle at 70% 70%,rgba(104,196,255,0.8),transparent 65%);
  box-shadow: 0 0 40px -10px rgba(58,168,255,0.6), 0 0 120px -20px rgba(104,196,255,0.5);
  animation: orbFloat 10s ease-in-out infinite;
  position: relative;
}

@keyframes orbFloat {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-28px); }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.25rem;
}

.btn {
  --pad-y: 0.85rem;
  --pad-x: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--pad-y) var(--pad-x);
  border-radius: calc(var(--radius) - 2px);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: .4px;
  border: 1px solid #2d343b;
  background: #1d242b;
  color: var(--text);
  cursor: pointer;
  position: relative;
  transition: background .25s, transform .15s;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn:hover {
  background: #242c34;
}
.btn.primary {
  background: linear-gradient(135deg,var(--accent) 0%,var(--accent-hover) 100%);
  color: #0d1114;
  border: none;
}
.btn.primary:hover {
  filter: brightness(1.08);
}
.btn.secondary {
  background: #202730;
}

/* Sección de descargas */
.downloads {
  padding: 2rem 1.5rem 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem 1rem;
  margin-top: 1rem;
}

.btn.download {
  justify-content: flex-start;
  gap: .6rem;
  padding: 0.9rem 1rem;
  background: #1c232b;
  border-color: #2a323a;
}
.btn.download:hover {
  background: #242c34;
}

.btn.download .icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: inline-block;
  vertical-align: -.2em;
  color: var(--accent);
}

.features,
.instructions,
.security,
.license,
.downloads {
  padding: 2rem 1.5rem 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.features h3,
.instructions h3,
.security h3,
.license h3 {
  margin-top: 0;
  font-size: 1.6rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.9rem;
}
.feature-list li {
  background: #161c22;
  padding: 0.85rem 1rem;
  border: 1px solid #242c33;
  border-radius: 10px;
  font-size: 0.95rem;
}

.instructions .steps {
  margin: 1rem 0;
  padding-left: 1.25rem;
}
.instructions .steps li {
  margin-bottom: .65rem;
  padding-left: .25rem;
}
.instructions code {
  background: #222a31;
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
  font-size: 0.85rem;
}

.note {
  margin-top: .75rem;
  font-size: .85rem;
  color: var(--text-dim);
}

.security p {
  margin-top: .6rem;
}

.license .smallprint {
  font-size: 0.7rem;
  line-height: 1.3;
  color: var(--text-dim);
  background: #151a1f;
  padding: 0.75rem 1rem;
  border: 1px solid #232a30;
  border-radius: 8px;
}

.site-footer {
  margin-top: 2rem;
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  font-size: 0.85rem;
  background: linear-gradient(to top,#0d1013,#12171d);
  border-top: 1px solid #1f262d;
}

.site-footer a {
  font-weight: 600;
}

copyright, .copyright {
  display: block;
  margin-top: .6rem;
  color: var(--text-dim);
}

@media (min-width: 880px) {
  .feature-list {
    grid-template-columns: repeat(2,1fr);
  }
  .hero-text {
    padding: 3rem 3.25rem;
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 2.5rem;
  }
  .hero-art {
    order: -1;
    padding-bottom: 1rem;
  }
}

@media (min-width: 1200px) {
  .hero {
    grid-template-columns: minmax(0,0.9fr) minmax(0,0.7fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  [data-animate],
  .in-view,
  .hero-art .orb {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

::selection {
  background: var(--accent);
  color: #0d1114;
}

/* Animaciones de entrada */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  will-change: opacity, transform;
}
.in-view {
  opacity: 1;
  transform: translateY(0);
  animation: fadeInUp .7s ease both;
}

@keyframes fadeInUp {
  from { opacity:0; transform: translateY(32px); }
  to { opacity:1; transform: translateY(0); }
}

/* Ajustes de instrucciones */
.instructions {
  background: linear-gradient(145deg,var(--bg-alt),#141a20);
  border: 1px solid #1f262d;
  border-radius: var(--radius);
  box-shadow: 0 6px 24px -10px rgba(0,0,0,0.55);
}

.security, .license {
  position: relative;
}

.security::before, .license::before {
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(90deg,rgba(58,168,255,0.05),transparent 70%);
  pointer-events:none;
  border-radius: 8px;
}