/* ============================================================================
   BirtaGlass — gler-undirskrift NexoItec-fjölskyldunnar
   Upprunnið í Birtu Coach (Embla 🌳, kúpta ljósið staðfest af Maríu 2.7.2026);
   pakkað sem deilanlegt stílblað 11.7.2026 svo allar síður fjölskyldunnar
   geti borið sama svipinn.

   Notkun:  <link rel="stylesheet" href="/birtaglass.css">
            <div class="bg-card"> … </div>
   Stillanlegt per síða með CSS-breytum (sjá :root).
   ========================================================================== */

:root {
  /* Aðal-áherslulitur síðunnar — hver síða setur sinn (nexoitec: rósagull). */
  --bg-accent: #b76e79;
  /* Grunn-gler: himinn/bakgrunnur síðunnar lifir í gegn. */
  --bg-gler: rgba(255, 255, 255, 0.045);
  --bg-gler-rammi: rgba(255, 255, 255, 0.14);
  --bg-radius: 18px;
  /* Skuggadýpt — dramatísk á dökkum bakgrunni, lækkið á ljósum. */
  --bg-grunn-skuggi: rgba(0, 0, 0, 0.45);
}

/* ---- Kúpta gler-kortið -------------------------------------------------- */
.bg-card {
  position: relative;
  isolation: isolate;
  background:
    /* mjúk lit-glóð efst-hægra í áherslulitnum */
    radial-gradient(ellipse 78% 60% at 100% 0%,
      color-mix(in srgb, var(--bg-accent) 10%, transparent) 0%,
      transparent 62%),
    /* hvít birta sem deyr niður — efsta gler-lagið */
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05), transparent 40%),
    var(--bg-gler);
  border: 1px solid var(--bg-gler-rammi);
  border-radius: var(--bg-radius);
  padding: 28px;
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  /* fullt kúpt BirtaGlass: innri gljái + hvít halo + lituð glóð + grunn-skuggi */
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    inset 0 -1px 0 rgba(255, 255, 255, 0.07),
    inset 0 8px 7px -7px rgba(255, 255, 255, 0.34),
    0 0 12px rgba(255, 255, 255, 0.05),
    0 6px 18px color-mix(in srgb, var(--bg-accent) 14%, transparent),
    0 16px 18px var(--bg-grunn-skuggi);
}

/* Kúpta ljósið efst: MIÐJAÐ radial-blóm sem deyr til hliðanna — les sem kúpt
   gler (bein rönd las sem límd stripa; lærdómur úr glerramma-æfingunni 2.7). */
.bg-card::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 6px;
  height: 28px;
  border-radius: 999px;
  background: radial-gradient(ellipse at 50% 0%, rgba(255, 255, 255, 0.42) 0%, transparent 72%);
  filter: blur(7px);
  pointer-events: none;
  z-index: -1;
}

/* ---- Innfelldur flötur (inputs, minni fletir inni í korti) --------------- */
.bg-innfellt {
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--bg-gler-rammi);
  border-radius: 12px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.16);
}

/* ---- Gler-hnappur --------------------------------------------------------- */
.bg-hnappur {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--bg-accent) 35%, transparent);
  background: color-mix(in srgb, var(--bg-accent) 14%, transparent);
  color: var(--bg-accent);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s;
}
.bg-hnappur:hover {
  background: color-mix(in srgb, var(--bg-accent) 20%, transparent);
  box-shadow: 0 0 40px color-mix(in srgb, var(--bg-accent) 25%, transparent);
  transform: scale(1.03);
}

/* Aðal-útgáfa hnappsins (fyllt) */
.bg-hnappur.adal {
  background: var(--bg-accent);
  color: #fff;
  border: none;
  box-shadow: 0 6px 24px color-mix(in srgb, var(--bg-accent) 40%, transparent);
}