/* ============================================================
   Liquid Glass — base styles
   Pairs with liquid-glass.js. The JS assigns `backdrop-filter: url(#…)`
   per element (chromatic displace -> blur -> saturate); this stylesheet
   supplies the tint, bevel, shine, cursor highlight, and tint variants.

   Theme via custom properties:
     --glass-radius   corner radius          (default 26px)
     --glass-tint     translucent fill       (default rgba(255,255,255,.06))
     --glass-border   rim color              (default rgba(255,255,255,.20))
   ============================================================ */

.glass {
  --glass-radius: 26px;
  --glass-tint: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.20);

  position: relative;
  border-radius: var(--glass-radius);
  background: var(--glass-tint);
  border: 1px solid var(--glass-border);
  /* Safari/Firefox fallback — no url() filter support for backdrop-filter */
  -webkit-backdrop-filter: blur(6px) saturate(170%);
  box-shadow:
    inset 0 1px 1px rgba(255, 255, 255, 0.55),   /* top bevel light */
    inset 0 -1px 1px rgba(255, 255, 255, 0.18),  /* bottom bevel */
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),   /* faint full rim */
    inset 0 0 14px rgba(255, 255, 255, 0.04),
    0 6px 24px rgba(0, 0, 0, 0.22);              /* float shadow */
  isolation: isolate;
}

/* static diagonal shine */
.glass::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(133deg,
    rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.06) 22%, transparent 42%);
  pointer-events: none; z-index: 1;
}

/* cursor-following specular highlight (set --mx/--my from JS to activate) */
.glass::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(130px circle at var(--mx, -200px) var(--my, -200px),
    rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.06) 40%, transparent 65%);
  pointer-events: none; z-index: 1; opacity: 0;
  transition: opacity 0.3s ease; mix-blend-mode: screen;
}
.glass:hover::after { opacity: 1; }
.glass > * { position: relative; z-index: 2; }

/* tint variants */
.glass--clear  { --glass-tint: rgba(255, 255, 255, 0.03); }
.glass--dark   { --glass-tint: rgba(0, 0, 0, 0.22); --glass-border: rgba(255, 255, 255, 0.12); }
.glass--frost  { --glass-tint: rgba(255, 255, 255, 0.12); }
.glass--tinted { --glass-tint: rgba(120, 170, 255, 0.14); }