/* ============================================================
   NEXO · UI KIT — chrome del sitio (identidad propia)
   Paleta base tomada de NEXO SD (azul-noche) pero tratada
   como herramienta: ficha técnica, mono para valores, reglas finas.
   ============================================================ */

:root {
  --bg: #0b1220;
  --bg-2: #0f1a2b;
  --panel: #111f34;
  --panel-2: #142640;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --ink: #e8eef7;
  --ink-muted: #93a4bc;
  --ink-faint: #6b7c96;
  --brand: #1477f8;
  --brand-cyan: #25c6da;
  --brand-grad: linear-gradient(90deg, #1477f8, #25c6da);
  --ok: #10b981;
  --warn: #f5a524;
  --err: #f24d67;
  --radius: 14px;
  --radius-sm: 9px;
  --sidebar-w: 270px;
  --content-max: 1120px;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Poppins", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

:root[data-chrome="light"] {
  --bg: #f4f6fb;
  --bg-2: #eef1f8;
  --panel: #ffffff;
  --panel-2: #f7f9fd;
  --border: rgba(11, 18, 32, 0.1);
  --border-strong: rgba(11, 18, 32, 0.2);
  --ink: #101a2c;
  --ink-muted: #4a5a72;
  --ink-faint: #7a8aa1;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 24px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 600; line-height: 1.2; margin: 0; }

code, kbd, pre { font-family: var(--font-mono); }

::selection { background: rgba(20, 119, 248, 0.3); }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  padding: 22px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 6px 10px 18px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.sidebar__brand img { width: 30px; height: 30px; }
.sidebar__brand b {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 14px;
}
.sidebar__brand span {
  display: block;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-cyan);
  margin-top: 2px;
}

.nav-group { margin-top: 10px; }
.nav-group__title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 8px 10px 6px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
  font-size: 13.5px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  position: relative;
}
.nav-link:hover { background: rgba(255, 255, 255, 0.04); color: var(--ink); }
:root[data-chrome="light"] .nav-link:hover { background: rgba(11, 18, 32, 0.05); }
.nav-link.is-active { background: rgba(20, 119, 248, 0.14); color: var(--ink); }
.nav-link.is-active::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 3px; height: 18px;
  transform: translateY(-50%);
  border-radius: 0 3px 3px 0;
  background: var(--brand);
}
.nav-link .dot {
  width: 7px; height: 7px; border-radius: 50%;
  flex-shrink: 0;
}
.nav-sub {
  margin-left: 16px;
  padding-left: 10px;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.nav-sub .nav-link { font-size: 12.5px; font-weight: 400; padding: 5px 10px; }

.sidebar__foot {
  margin-top: auto;
  padding: 14px 10px 0;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-faint);
  line-height: 1.7;
}

/* ---------- Main ---------- */
.main { flex: 1; min-width: 0; }
.main__inner { max-width: var(--content-max); margin: 0 auto; padding: 46px 48px 120px; }

.topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 40;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.topbar b { font-family: var(--font-head); font-size: 13px; letter-spacing: 0.02em; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Section scaffolding ---------- */
.proj-section { padding-top: 40px; margin-top: 40px; border-top: 1px solid var(--border); }
.proj-section:first-of-type { border-top: none; margin-top: 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand-cyan);
  display: block;
  margin-bottom: 12px;
}

.proj-head h2 { font-size: 30px; letter-spacing: -0.01em; }
.proj-head p { color: var(--ink-muted); max-width: 60ch; margin: 10px 0 0; }

.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.chip {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--ink-muted);
}
.chip--path { color: var(--brand-cyan); border-color: rgba(37, 198, 218, 0.35); }

.subhead {
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 44px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.note {
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--warn);
  background: var(--panel);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 13px;
  color: var(--ink-muted);
}
.note b { color: var(--ink); }
.note--info { border-left-color: var(--brand-cyan); }

/* ---------- Fundamentos: swatches ---------- */
.swatch-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.swatch {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--panel);
}
.swatch__chip { height: 74px; border-bottom: 1px solid var(--border); }
.swatch__body { padding: 10px 12px; }
.swatch__name { font-size: 12.5px; font-weight: 600; }
.swatch__val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  cursor: copy;
  display: inline-block;
  margin-top: 2px;
}
.swatch__val:hover { color: var(--brand-cyan); }
.swatch__role { font-size: 11px; color: var(--ink-faint); margin-top: 5px; line-height: 1.45; }

/* ---------- Fundamentos: type / spacing / radius / shadow ---------- */
.spec-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 22px 24px;
  margin-bottom: 14px;
}
.type-row { padding: 12px 0; border-top: 1px dashed var(--border); }
.type-row:first-child { border-top: none; }
.type-row__meta { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); margin-bottom: 4px; }

.scale-row { display: flex; align-items: center; gap: 14px; padding: 5px 0; }
.scale-row__label { font-family: var(--font-mono); font-size: 11px; color: var(--ink-muted); width: 92px; flex-shrink: 0; }
.scale-row__bar { height: 14px; background: var(--brand-grad); border-radius: 3px; }
.scale-row__val { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); }

.token-row { display: flex; flex-wrap: wrap; gap: 18px; }
.token-demo { text-align: center; }
.token-demo__box {
  width: 108px; height: 76px;
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
}
.token-demo__label { font-family: var(--font-mono); font-size: 11px; color: var(--ink-muted); margin-top: 8px; }
.token-demo__val { font-family: var(--font-mono); font-size: 10px; color: var(--ink-faint); }

/* ---------- Componentes: preview surface ---------- */
.cmp {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  margin-bottom: 18px;
  overflow: hidden;
}
.cmp__bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}
.cmp__name { font-family: var(--font-head); font-weight: 600; font-size: 14px; }
.cmp__desc { font-size: 12px; color: var(--ink-faint); }

.cmp__stage {
  padding: 30px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px 22px;
  align-items: flex-start;
}
.cmp__stage.is-col { flex-direction: column; }
.cmp__stage.center { align-items: center; }

/* label under each example */
.ex { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.ex > .ex__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.cmp__code {
  border-top: 1px solid var(--border);
  background: #0a1523;
  position: relative;
}
:root[data-chrome="light"] .cmp__code { background: #0d1a2c; }
.cmp__code pre {
  margin: 0;
  padding: 15px 46px 15px 18px;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.65;
  color: #b9c7da;
}
.cmp__code .tok-cls { color: #7fd4e6; }
.cmp__code .tok-tag { color: #6ea8fe; }
.copy-btn {
  position: absolute;
  top: 9px; right: 9px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  color: #b9c7da;
  cursor: pointer;
}
.copy-btn:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

/* ---------- Comparativa ---------- */
.cmp-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.cmp-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 640px; }
.cmp-table th, .cmp-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.cmp-table th {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: var(--panel-2);
}
.cmp-table td:first-child { font-weight: 600; }
.cmp-table tr:last-child td { border-bottom: none; }
.mini-sw { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 11px; color: var(--ink-muted); }
.mini-sw i { width: 15px; height: 15px; border-radius: 4px; border: 1px solid var(--border-strong); flex-shrink: 0; }

.type-compare { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.type-compare__cell { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 18px; background: var(--panel); }
.type-compare__cell h4 { font-size: 13px; color: var(--ink-muted); margin-bottom: 10px; font-family: var(--font-mono); font-weight: 400; letter-spacing: 0.08em; text-transform: uppercase; }
.type-compare__cell .disp { font-size: 26px; margin-bottom: 4px; }
.type-compare__cell .body { font-size: 14px; }
.type-compare__cell .meta { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); margin-top: 10px; }

/* ---------- Overview / hero ---------- */
.hero { margin-bottom: 8px; }
.hero h1 { font-size: 42px; letter-spacing: -0.02em; }
.hero h1 .grad { background: var(--brand-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--ink-muted); max-width: 62ch; font-size: 16px; margin-top: 14px; }
.overview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 30px; }
.ov-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 18px 20px;
  transition: border-color 0.15s, transform 0.15s;
}
.ov-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.ov-card__top { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.ov-card__swatches { display: flex; gap: 4px; }
.ov-card__swatches i { width: 16px; height: 16px; border-radius: 4px; border: 1px solid var(--border-strong); }
.ov-card h3 { font-size: 15px; }
.ov-card p { font-size: 12.5px; color: var(--ink-muted); margin: 0; }
.ov-card__meta { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-faint); margin-top: 12px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .main__inner { padding: 34px 30px 100px; }
}
@media (max-width: 860px) {
  .sidebar {
    position: fixed;
    z-index: 60;
    left: 0; top: 0;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
  }
  .sidebar.is-open { transform: translateX(0); }
  .topbar { display: flex; }
  .main__inner { padding: 26px 18px 90px; }
  .hero h1 { font-size: 32px; }
  .proj-head h2 { font-size: 24px; }
  .scrim {
    position: fixed; inset: 0; z-index: 55;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0; pointer-events: none;
    transition: opacity 0.2s;
  }
  .scrim.is-open { opacity: 1; pointer-events: auto; }
}