/* NextSync landing - look & feel gnome.org (paleta GNOME oficial + Inter) */
:root {
  --blue1: rgb(153, 193, 241);
  --blue2: rgb(98, 160, 234);
  --blue3: rgb(53, 132, 228);
  --blue4: rgb(28, 113, 216);
  --blue5: rgb(26, 95, 180);
  --gnomeblue: #4a86cf;
  --green3: rgb(51, 209, 122);
  --purple4: rgb(129, 61, 156);
  --light1: rgb(255, 255, 255);
  --light2: rgb(246, 245, 244);
  --light3: rgb(222, 221, 218);
  --dark3: rgb(61, 56, 70);
  --dark4: rgb(36, 31, 49);
  --bg: #f6f5f4;
  --fg: #1b1b1b;
  --fg-dim: #4b4a4e;
  --card: #ffffff;
  --card-border: rgba(0, 0, 0, 0.07);
  --link: var(--blue5);
  --accent: var(--blue4);
  --accent-fg: #ffffff;
  --nav-bg: rgba(246, 245, 244, 0.82);
  --hero-grad: linear-gradient(to bottom, #ccdef9 0%, rgba(204, 222, 249, 0) 78%);
  --btn-bg: rgba(0, 0, 0, 0.08);
  --btn-fg: #1b1b1b;
  --radius: 12px;
  --pill: 500px;
  --pagewidth: 62rem;
  --slickease: cubic-bezier(0.17, 0.89, 0.32, 1.28);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 8px 24px rgba(0, 0, 0, 0.06);
  --mono: "JetBrains Mono", monospace;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #15161a;
  --fg: #f6f5f4;
  --fg-dim: #b9b7bd;
  --card: #1e1f24;
  --card-border: rgba(255, 255, 255, 0.09);
  --link: var(--blue2);
  --accent: var(--blue2);
  --nav-bg: rgba(21, 22, 26, 0.82);
  --hero-grad: linear-gradient(to bottom, #433583 0%, rgba(84, 148, 224, 0) 82%);
  --btn-bg: rgba(255, 255, 255, 0.1);
  --btn-fg: #f6f5f4;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: Inter, "Inter Variable", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  color: var(--fg);
  background: var(--bg);
}

h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 2rem; margin: 0 0 0.5rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }
p { margin: 0 0 1rem; }
code {
  font-family: var(--mono); font-size: 0.85em;
  background: var(--btn-bg); border-radius: 6px; padding: 0.1em 0.4em;
}
a { color: var(--link); font-weight: 600; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--pagewidth); margin: 0 auto; padding: 0 1.5rem; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-fg); padding: 0.5rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- NAV (siempre visible) ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--card-border);
}
.nav-inner { display: flex; align-items: center; gap: 1.5rem; min-height: 62px; }
.nav-logo {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 800; font-size: 1.15rem; color: var(--fg);
}
.nav-logo:hover { text-decoration: none; }
.nav-logo img { display: block; }
.nav-links { display: flex; gap: 0.2rem; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  color: var(--fg); font-weight: 500; padding: 0.35rem 0.9rem;
  border-radius: var(--pill); transition: background-color 250ms ease-out;
}
.nav-links a:hover { background: var(--btn-bg); text-decoration: none; }
.nav-links a.active { background: var(--btn-bg); font-weight: 700; }
.nav-actions { display: flex; align-items: center; gap: 0.6rem; }
#langSelect {
  font: inherit; font-weight: 600; color: var(--fg);
  background: var(--btn-bg); border: none; border-radius: var(--pill);
  padding: 0.35rem 0.8rem; cursor: pointer;
}
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: none; border-radius: 50%;
  background: var(--btn-bg); color: var(--btn-fg); cursor: pointer;
  transition: box-shadow 200ms var(--slickease);
}
.icon-btn:hover { box-shadow: 0 0 0 2px var(--btn-bg); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ---------- Botones (patrón gnome.org) ---------- */
.btn {
  font-weight: 600; color: var(--btn-fg); background: var(--btn-bg);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4em;
  padding: 0.6rem 1.5rem; border: none; border-radius: var(--pill);
  text-decoration: none; cursor: pointer; font-size: 100%; white-space: nowrap;
  box-shadow: 0 0 0 0 var(--btn-bg); transition: box-shadow 200ms var(--slickease);
}
.btn:hover { box-shadow: 0 0 0 2px var(--btn-bg); text-decoration: none; }
.btn.big { padding: 0.8rem 2rem; font-size: 1.05rem; }
.btn.suggested {
  font-weight: 700; background: var(--blue5); color: #fff;
  box-shadow: 0 0 0 0 var(--blue5);
}
.btn.suggested:hover { background: var(--blue4); box-shadow: 0 0 0 3px var(--blue4); }
.btn.suggested:active { background: var(--blue3); }
.nav-cta { padding: 0.45rem 1.2rem; }

/* ---------- HERO ---------- */
.hero { position: relative; overflow: hidden; text-align: center; padding: 4.5rem 0 3rem; }
.hero-bg { position: absolute; inset: 0; background: var(--hero-grad); pointer-events: none; }
.hero-bg::before, .hero-bg::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.5;
}
.hero-bg::before {
  width: 480px; height: 480px; left: -120px; top: -80px;
  background: radial-gradient(circle, var(--blue1), transparent 70%);
  animation: drift1 22s ease-in-out infinite alternate;
}
.hero-bg::after {
  width: 420px; height: 420px; right: -100px; top: 40px;
  background: radial-gradient(circle, var(--purple4), transparent 70%); opacity: 0.28;
  animation: drift2 26s ease-in-out infinite alternate;
}
@keyframes drift1 { to { transform: translate(70px, 40px) scale(1.12); } }
@keyframes drift2 { to { transform: translate(-60px, 60px) scale(1.05); } }
.hero-inner { position: relative; }
.eyebrow {
  display: inline-block; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--link); margin-bottom: 1rem;
}
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); margin: 0 0 1.2rem; }
.text-accent { color: var(--accent); }
.hero-sub { max-width: 46ch; margin: 0 auto 1.6rem; color: var(--fg-dim); font-size: 1.12rem; }
.hero-actions { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.6rem; }
.hero-facts {
  display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap;
  list-style: none; padding: 0; margin: 0 0 3rem;
}
.hero-facts li {
  font-size: 0.85rem; font-weight: 600; color: var(--fg-dim);
  border: 1px solid var(--card-border); background: var(--card);
  border-radius: var(--pill); padding: 0.3rem 0.9rem;
}

/* Widget de sync animado */
.sync-widget { max-width: 720px; margin: 0 auto; }
.sw-node rect { fill: var(--card); stroke: var(--card-border); }
.sw-glyph { stroke: var(--fg); }
.sw-label { fill: var(--fg); font: 600 19px Inter, sans-serif; }
.sw-cloud circle { fill: var(--blue3); opacity: 0.92; }
.sw-path { stroke: var(--fg-dim); stroke-width: 3; stroke-dasharray: 8 10; opacity: 0.45; fill: none; }
.sw-dot { fill: var(--green3); }
.sw-dot.down { fill: var(--blue3); }
.sw-dot.d2 { opacity: 0.7; }

/* ---------- Secciones ---------- */
.block { padding: 4rem 0; }
.block.alt { background: var(--card); border-block: 1px solid var(--card-border); }
.lead { color: var(--fg-dim); max-width: 56ch; margin-bottom: 2rem; }
#shots .lead, .block.alt .lead { margin-inline: auto; }
#shots { text-align: center; }

.cards { display: grid; gap: 1.2rem; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.cards.two { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 1.4rem 1.5rem; box-shadow: var(--shadow);
  transition: transform 300ms var(--slickease), box-shadow 300ms var(--slickease);
}
.card:hover { transform: translateY(-4px); }
.card p { color: var(--fg-dim); margin: 0; }

/* ---------- Slider de capturas ---------- */
.slider { position: relative; max-width: 900px; margin: 0 auto; }
.slider-viewport {
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  border: 1px solid var(--card-border); cursor: zoom-in;
}
.slider-viewport img { display: block; width: 100%; height: auto; }
.slider-arrow {
  position: absolute; top: 40%; transform: translateY(-50%);
  width: 46px; height: 46px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--card); color: var(--fg); font-size: 1.1rem; box-shadow: var(--shadow);
  transition: box-shadow 200ms var(--slickease);
}
.slider-arrow:hover { box-shadow: 0 0 0 3px var(--blue3); }
.slider-arrow.prev { left: -23px; }
.slider-arrow.next { right: -23px; }
.slider-thumbs { display: flex; gap: 0.7rem; justify-content: center; margin-top: 1rem; }
.slider-thumbs button {
  border: 2px solid transparent; border-radius: 8px; padding: 0; cursor: pointer;
  background: none; width: 120px; overflow: hidden; opacity: 0.65;
  transition: opacity 200ms, border-color 200ms;
}
.slider-thumbs button img { display: block; width: 100%; height: auto; }
.slider-thumbs button[aria-selected="true"] { border-color: var(--blue3); opacity: 1; }
.slider-caption { color: var(--fg-dim); font-size: 0.95rem; margin-top: 0.8rem; }

/* ---------- Comparativa ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.matrix { width: 100%; border-collapse: collapse; background: var(--card); font-size: 0.98rem; }
.matrix th, .matrix td { padding: 0.9rem 1.1rem; text-align: left; border-bottom: 1px solid var(--card-border); }
.matrix thead th { font-weight: 700; background: var(--btn-bg); }
.matrix td.yes { color: var(--green3); font-weight: 700; }
[data-theme="light"] .matrix td.yes { color: #176140; }
.matrix td.no { color: #c01c28; font-weight: 600; }
.matrix td.mid { color: #8a5600; font-weight: 600; }
[data-theme="dark"] .matrix td.mid { color: #f5c211; }
.honest {
  margin-top: 1.6rem; border-left: 4px solid var(--blue3);
  background: var(--card); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.2rem 1.5rem; box-shadow: var(--shadow);
}
.honest ul { margin: 0; padding-left: 1.2rem; color: var(--fg-dim); }

/* ---------- Instalación ---------- */
.install-card { text-align: center; }
.code-block {
  display: block; font-family: var(--mono); font-size: 0.95rem;
  background: var(--dark4); color: #e8e6ec; border-radius: 10px;
  padding: 1rem 1.3rem; overflow-x: auto; text-align: left; white-space: pre;
  margin: 0 0 1rem;
}
.reqs { margin-top: 1.2rem; }
.small-print { font-size: 0.9rem; color: var(--fg-dim); margin: 0.8rem 0 0; }

/* ---------- FAQ ---------- */
.faq { margin-top: 2rem; max-width: 46rem; }
.faq details {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 0.9rem 1.2rem; margin-bottom: 0.7rem;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 0.6rem 0 0; color: var(--fg-dim); }
.faq details[open] summary { color: var(--accent); }

/* ---------- About ---------- */
.about-text { max-width: 56ch; }

/* ---------- Footer ---------- */
footer { background: #1a1622; color: #fff; padding: 3rem 0 3.5rem; margin-top: 2rem; }
footer .tagline { font-weight: 800; font-size: 1.2rem; }
.bottomlinks { list-style: none; padding: 0; margin: 1rem 0 1.5rem; display: flex; gap: 1.4rem; flex-wrap: wrap; }
.bottomlinks a { color: rgba(255, 255, 255, 0.85); font-weight: 500; }
.bottomlinks a:hover { color: #fff; }
footer .copy { font-size: 0.8rem; color: rgba(255, 255, 255, 0.55); max-width: 60ch; }

/* ---------- Lightbox ---------- */
dialog#lightbox {
  border: none; border-radius: var(--radius); padding: 0; max-width: 92vw; max-height: 90vh;
  background: var(--card); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
dialog#lightbox::backdrop { background: rgba(20, 16, 34, 0.6); backdrop-filter: blur(6px); }
dialog#lightbox img { display: block; max-width: 92vw; max-height: 86vh; }
.lightbox-close {
  position: absolute; top: 10px; right: 10px; width: 40px; height: 40px;
  border-radius: 50%; border: none; background: rgba(0, 0, 0, 0.55); color: #fff;
  font-size: 1rem; cursor: pointer;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease-out, transform 600ms var(--slickease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 90ms; }
.reveal.d2 { transition-delay: 180ms; }
.reveal.d3 { transition-delay: 270ms; }
.reveal.d4 { transition-delay: 360ms; }
.reveal.d5 { transition-delay: 450ms; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .cards.three { grid-template-columns: 1fr; }
  .cards.two { grid-template-columns: 1fr; }
  .nav-inner { flex-wrap: wrap; padding: 0.5rem 1.5rem; }
  .nav-links { order: 3; width: 100%; justify-content: center; margin-left: 0; }
  .nav-actions { margin-left: auto; }
  .slider-arrow.prev { left: 6px; }
  .slider-arrow.next { right: 6px; }
  .slider-thumbs button { width: 72px; }
}