/* ─────────────────────────────────────────────────────────────────────────────
   SinapsiaLab design system — chrome layer for LinksBuilder.
   Canonical source: sinapsialab-astro/src/styles/global.css + DESIGN.md.
   Mirror of the --portfolio-* palette and the retro layer (NoStateNode clone).
   Retro = shape + shadow + font; colors stay --portfolio-*.
   Chrome only: the published links page (linkspage.css) and the builder's
   preview iframe belong to the user's brand and never load this file.
   ───────────────────────────────────────────────────────────────────────────── */

:root {
  /* Portfolio palette */
  --portfolio-deep: #0c070f;
  --portfolio-dark: #150a1a;
  --portfolio-base: #1a0f20;
  --portfolio-medium: #2a1530;
  --portfolio-accent: #3a2540;
  --portfolio-gradient-1: #4a2560;
  --portfolio-gradient-2: #5a3570;
  --portfolio-gradient-3: #6a3590;
  --portfolio-gradient-4: #7a45a0;
  --portfolio-text: #c8b8d8;
  --portfolio-text-light: #e0d0f0;
  --portfolio-light: #cdb7e4;
  --portfolio-orange: #e7762b;

  /* Derived alphas (Tailwind's text-portfolio-text/70, bg-portfolio-orange/15 …) */
  --portfolio-text-muted: rgb(200 184 216 / 0.7);
  --portfolio-text-faint: rgb(200 184 216 / 0.5);
  --portfolio-orange-soft: rgb(231 118 43 / 0.12);
  --portfolio-violet-soft: rgb(122 69 160 / 0.18);

  /* Logo multicolor gradient — brand name / decorative only */
  --sl-gradient: linear-gradient(90deg, #ec4899 0%, #facc15 50%, #3b82f6 100%);

  /* Semantic status (outside the brand palette; feedback messages only) */
  --status-success: #4ade80;
  --status-warn: #f59e0b;
  --status-error: #f87171;

  /* Retro layer — NoStateNode clone */
  --retro-shadow-color: #000;
  --retro-offset-color: #5a3570;
  --retro-offset-strong: #7a45a0;
  --retro-shadow: -4px 5px 0 0 var(--retro-offset-color);
  --retro-shadow-hover: 7px -4px 0 0 var(--retro-offset-strong);
  --retro-shadow-lg: -6px 7px 0 0 var(--retro-offset-color);
  --retro-shadow-soft: 9px 11px 16px 1px var(--retro-shadow-color);
  --retro-radius: 5px;
  --retro-radius-lg: 8px;
  --retro-border-width: 2px;
  --font-retro-weight: 300;
  --font-retro-weight-display: 700;
  --retro-ghost-color: rgba(231, 118, 43, 0.55);
  --retro-glow: 0 3px 16px 2px rgba(231, 118, 43, 0.30);
  --font-retro-display: 'Source Code Pro Variable', 'Source Code Pro', ui-monospace, 'Cascadia Code', monospace;

  /* App chrome: fixed-height topbar so everything below can size against it. */
  --topbar-height: 3.75rem;
}

@media (min-width: 768px) {
  :root { --topbar-height: 4.25rem; }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* clip (not hidden): hidden turns body into a scroll container and breaks the sticky topbar. */
html, body { overflow-x: clip; }

html { scroll-padding-top: var(--topbar-height); }

/* NSN-pure typography: mono everywhere, weight is the only hierarchy lever. */
body {
  font-family: var(--font-retro-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  background: var(--portfolio-deep);
  color: var(--portfolio-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-retro-weight-display);
  letter-spacing: 0.06em;
  color: var(--portfolio-light);
}

label,
button {
  font-weight: var(--font-retro-weight);
  letter-spacing: 0.03em;
}

button, input, textarea, select { font-family: inherit; }

/* NSN signature: orange ghost behind big titles. */
h1, h2 {
  text-shadow: 5px 6px 0 var(--retro-ghost-color);
}

/* ── Retro building blocks ── */

.retro-shadow { box-shadow: var(--retro-shadow); }
.retro-shadow-soft { box-shadow: var(--retro-shadow-soft); }

.retro-title { text-shadow: 10px 13px 0 var(--retro-ghost-color); }

.logo-retro {
  display: inline-block;
  font-family: var(--font-retro-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--portfolio-text-light);
  text-shadow: -4px 5px 0 var(--portfolio-gradient-3);
}

.text-retro-shadow { text-shadow: 0.125rem 0.1875rem 0 var(--portfolio-dark); }
.text-retro-shadow-sm { text-shadow: 0.0625rem 0.125rem 0 var(--portfolio-dark); }

.btn-retro {
  font-family: var(--font-retro-display);
  letter-spacing: 0.06em;
  font-weight: var(--font-retro-weight);
  text-transform: capitalize;
  border-radius: var(--retro-radius);
  border: var(--retro-border-width) solid var(--portfolio-dark);
  box-shadow: var(--retro-shadow);
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease, font-weight 0.15s ease;
}

.btn-retro:hover {
  box-shadow: var(--retro-shadow-hover);
  font-weight: 500;
  opacity: 0.9;
}

.card-retro {
  border-radius: var(--retro-radius);
  border: var(--retro-border-width) solid var(--portfolio-accent);
  box-shadow: var(--retro-shadow);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.card-retro-lg { box-shadow: var(--retro-shadow-lg); }

.card-retro-interactive { cursor: pointer; }
.card-retro-interactive:hover { box-shadow: var(--retro-shadow), var(--retro-glow); }

.input-retro {
  border-radius: var(--retro-radius);
  border: var(--retro-border-width) solid var(--portfolio-accent);
  box-shadow: var(--retro-shadow);
  outline: none;
}

.input-retro:focus { border-color: var(--portfolio-orange); }

/* CTA glow — multicolor sweep behind the main call to action. */
.cta-glow {
  position: relative;
  isolation: isolate;
}

.cta-glow::before {
  content: '';
  position: absolute;
  inset: -0.5rem;
  z-index: 0;
  border-radius: 0.75rem;
  pointer-events: none;
  background: linear-gradient(
      90deg,
      rgb(236 72 153 / 0),
      rgb(236 72 153 / 0.55) 20%,
      rgb(250 204 21 / 0.55),
      rgb(59 130 246 / 0.55) 80%,
      rgb(59 130 246 / 0)
    )
    0% 0% / 220% 100% no-repeat;
  filter: blur(0.75rem);
  opacity: 0.65;
  animation: gradient-neon-sweep 6s ease-in-out infinite;
}

.cta-glow > * {
  position: relative;
  z-index: 1;
}

@keyframes gradient-neon-sweep {
  0%, 100% { background-position: -40% 0; }
  50% { background-position: 140% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cta-glow::before { animation: none; }
}

/* Brand name link — multicolor gradient text + animated underline. */
.gradient-link {
  position: relative;
  font-weight: 700;
  text-decoration: none;
  color: transparent;
  background: var(--sl-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 10px 8px rgb(0 0 0 / 0.04)) drop-shadow(0 4px 3px rgb(0 0 0 / 0.1));
}

.gradient-link::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 100%;
  height: 0.125rem;
  background: var(--sl-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.gradient-link:hover::before { transform: scaleX(1); }

.gradient-text {
  background: var(--sl-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Slim violet scrollbar. */
.scrollbar-custom {
  scrollbar-width: thin;
  scrollbar-color: rgb(139 92 246 / 0.5) rgb(21 10 26);
}
.scrollbar-custom::-webkit-scrollbar { width: 8px; }
.scrollbar-custom::-webkit-scrollbar-track { background: rgb(21 10 26); border-radius: 4px; }
.scrollbar-custom::-webkit-scrollbar-thumb { background: rgb(139 92 246 / 0.5); border-radius: 4px; }
.scrollbar-custom::-webkit-scrollbar-thumb:hover { background: rgb(139 92 246 / 0.7); }

.section-divider-dark-to-light {
  width: 100%;
  height: 1rem;
  background: linear-gradient(to bottom, var(--portfolio-deep) 0%, var(--portfolio-dark) 100%);
}

.section-divider-light-to-dark {
  width: 100%;
  height: 1rem;
  background: linear-gradient(to bottom, var(--portfolio-dark) 0%, var(--portfolio-deep) 100%);
}

@media (min-width: 768px) {
  .section-divider-dark-to-light,
  .section-divider-light-to-dark { height: 2.5rem; }
}

:focus-visible {
  outline: 2px solid var(--portfolio-orange);
  outline-offset: 2px;
}

/* ── Shared app chrome (topbar + footer) ── */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-shrink: 0;
  height: var(--topbar-height);
  padding: 0 0.75rem;
  background: var(--portfolio-dark);
  border-bottom: var(--retro-border-width) solid var(--portfolio-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-brand {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  gap: 0.625rem;
  min-width: 0;
  text-decoration: none;
}

/* Wordmark "LINKSBUILDER by SinapsiaLab": same on every page. */
.topbar-brand--wordmark { gap: 0.375rem; }

.topbar-brand-home {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 2.75rem;
  text-decoration: none;
}

.topbar-app {
  font-size: 0.9375rem;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
  text-shadow: -2px 2px 0 var(--portfolio-gradient-3); /* the big logo shadow reads as a ghost copy at this size */
}

.topbar-by {
  display: none;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--portfolio-text-muted);
  white-space: nowrap;
}

.topbar-name {
  display: none;
  font-size: 0.9375rem;
  white-space: nowrap;
}

/* Under 400px "by SinapsiaLab" is dropped so brand and actions fit. */
@media (min-width: 400px) {
  .topbar-by { display: inline; }
  .topbar-name { display: inline-block; }
}

@media (min-width: 641px) {
  .topbar-app { font-size: 1rem; }
  .topbar-by { font-size: 0.75rem; }
  .topbar-name { font-size: 1rem; }
}

.topbar-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .topbar { padding: 0 1.5rem; }
}

/* Footer contract: © {YYYY} Creado con ❤️ por SinapsiaLab */
.sl-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.25rem 0.375rem;
  width: 100%;
  padding: 0 1rem;
  background: linear-gradient(to right, var(--portfolio-deep), var(--portfolio-dark), var(--portfolio-base));
  text-align: center;
}

.sl-footer__t {
  margin: 0;
  font-size: 0.6875rem;
  line-height: 1.3;
  color: var(--portfolio-text);
}

.sl-footer__a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  font-size: 0.75rem;
  line-height: 1.3;
}

@media (min-width: 640px) {
  .sl-footer { gap: 0.5rem; padding: 0.25rem 0; }
  .sl-footer__t { font-size: 0.75rem; }
  .sl-footer__a { font-size: 1rem; }
}