/* ==========================================================================
   BRIGHTLOOP — ESTILOS PROPIOS DE LA GUÍA
   Sólo lo que existe para documentar. Nada de aquí se usa en la web pública.
   ========================================================================== */

.sg-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 40;
  background-color: color-mix(in srgb, var(--surface-page) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  border-block-end: 1px solid var(--border-hairline);
}
.sg-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  min-height: var(--header-h);
}
.sg-header__meta {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tr-micro);
  text-transform: uppercase;
  color: var(--text-tertiary);
}
@media (min-width: 48rem) { .sg-header__meta { display: block; } }

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

.sg-hero {
  position: relative;
  display: grid;
  align-content: center;
  min-height: min(74svh, 40rem);
  padding-block: var(--section-pad);
  overflow: hidden;
}
.sg-hero__canvas {
  position: absolute;
  inset: 50% auto auto 50%;
  translate: -50% -50%;
  width: min(150%, 62rem);
  aspect-ratio: 1;
  pointer-events: none;
}
.sg-hero__content { position: relative; }

/* --- Bloque de sección ------------------------------------------------ */

.sg-block { border-block-start: 1px solid var(--border-hairline); }

.sg-note {
  max-width: var(--measure-prose);
  font-size: var(--fs-body-sm);
  line-height: var(--lh-prose);
  color: var(--text-secondary);
}
.sg-note code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.1em 0.35em;
  border-radius: var(--r-xs);
  background-color: var(--surface-sunken);
  color: var(--text-primary);
}

.sg-sub {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  margin-block: var(--sp-10) var(--sp-6);
}
.sg-sub::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-hairline);
}
.sg-sub:first-child { margin-block-start: 0; }

/* --- Rejillas de muestra ---------------------------------------------- */

.sg-grid {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: repeat(auto-fill, minmax(min(15rem, 100%), 1fr));
}
.sg-grid--wide {
  grid-template-columns: repeat(auto-fill, minmax(min(20rem, 100%), 1fr));
}

/* --- Muestras de color ------------------------------------------------ */

.sw {
  display: grid;
  gap: var(--sp-3);
}
.sw__chip {
  height: 4.5rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-hairline);
}
.sw__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}
.sw__name { color: var(--text-primary); text-transform: none; }

.sw-ramp {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(3.5rem, 1fr));
  border-radius: var(--r-sm);
  overflow: hidden;
  border: 1px solid var(--border-hairline);
}
.sw-ramp div {
  aspect-ratio: 1 / 1.6;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-block-end: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.04em;
}

/* --- Especímenes tipográficos ----------------------------------------- */

.spec {
  display: grid;
  gap: var(--sp-3);
  padding-block: var(--sp-6);
  border-block-end: 1px solid var(--border-hairline);
}
.spec:last-child { border-block-end: 0; }
.spec__tag {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-5);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}
.spec__tag b { color: var(--text-primary); font-weight: var(--fw-medium); }
.spec__sample { overflow: hidden; }

/* --- Escala de espaciado ---------------------------------------------- */

.sp-row {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  align-items: center;
  gap: var(--sp-4);
  padding-block: var(--sp-2);
}
.sp-row__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}
.sp-row__bar {
  height: 0.5rem;
  border-radius: var(--r-xs);
  background-color: var(--text-primary);
}

/* --- Demostradores ---------------------------------------------------- */

.demo {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-5);
  padding: var(--sp-7);
  border: 1px dashed var(--border-strong);
  border-radius: var(--r-md);
}
.demo--stack { flex-direction: column; align-items: stretch; }

.radius-demo {
  display: grid;
  place-items: center;
  height: 5rem;
  border: 1px solid var(--border-strong);
  background-color: var(--surface-sunken);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}

.elev-demo {
  display: grid;
  place-items: center;
  height: 6rem;
  border-radius: var(--r-md);
  background-color: var(--surface-raised);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}

.ease-demo {
  position: relative;
  height: 2.5rem;
  border-radius: var(--r-sm);
  background-color: var(--surface-sunken);
  overflow: hidden;
  cursor: pointer;
}
.ease-demo__dot {
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 0.5rem;
  width: 1.25rem; height: 1.25rem;
  margin-block-start: -0.625rem;
  border-radius: var(--r-full);
  background-color: var(--text-primary);
  transition-property: transform;
  transition-duration: var(--demo-dur, 520ms);
  transition-timing-function: var(--demo-ease, ease);
}
.ease-demo:hover .ease-demo__dot { transform: translateX(calc(100cqw - 2.75rem)); }
.ease-demo { container-type: inline-size; }

/* --- Prohibiciones ---------------------------------------------------- */

.dont {
  display: grid;
  gap: var(--sp-3);
  padding: var(--sp-5);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  background-color: var(--surface-sunken);
  font-size: var(--fs-body-sm);
  line-height: 1.5;
  color: var(--text-secondary);
}
.dont__head {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tr-micro);
  text-transform: uppercase;
  color: var(--feedback-error);
}
.dont--do .dont__head { color: var(--feedback-ok); }

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

.sg-footer {
  border-block-start: 1px solid var(--border-hairline);
  padding-block: var(--sp-9);
  font-size: var(--fs-caption);
  color: var(--text-tertiary);
}