/* Shield InfoSec — lightweight interaction and 3D polish. Keeps the charcoal/gold identity. */
:root {
  --sh-gold: #d6a84e;
  --sh-gold-light: #e4bc6a;
  --sh-ink: #0f1012;
  --sh-motion-fast: 180ms;
}

html { scroll-padding-top: 5.5rem; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
:target { scroll-margin-top: 5.5rem; }

#shield-scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 1000;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #b9852d, #f1d58b 65%, #fff2bd);
  box-shadow: 0 0 12px rgb(214 168 78 / 38%);
  pointer-events: none;
  transform-origin: left center;
}

#shield-back-to-top {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 80;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgb(214 168 78 / 55%);
  border-radius: 12px;
  color: var(--sh-gold-light);
  background: rgb(15 16 18 / 90%);
  box-shadow: 0 10px 28px rgb(0 0 0 / 28%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  cursor: pointer;
}
#shield-back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
#shield-back-to-top:hover {
  border-color: var(--sh-gold-light);
  box-shadow: 0 12px 32px rgb(0 0 0 / 38%), 0 0 20px rgb(214 168 78 / 13%);
}
#shield-back-to-top:focus-visible,
.sh-tilt-card:focus-visible {
  outline: 2px solid var(--sh-gold-light);
  outline-offset: 3px;
}

#home figure { isolation: isolate; }
#home .shield-3d-hero {
  position: absolute;
  z-index: 0;
  top: 76px;
  right: 26px;
  width: min(30%, 132px);
  height: auto;
  aspect-ratio: 221 / 300;
  opacity: .24;
  pointer-events: none;
  filter: drop-shadow(0 0 18px rgb(214 168 78 / .35));
  transform: perspective(600px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  transition: transform .25s ease-out;
}
@media (prefers-reduced-motion: no-preference) {
  #home .shield-3d-hero { animation: shield-float 6s ease-in-out infinite; }
}
@keyframes shield-float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -8px; }
}
#home figure > div,
#home figure > svg {
  position: relative;
  z-index: 1;
}

.sh-interactive-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s ease, transform .5s cubic-bezier(.2,.75,.2,1);
}
.sh-interactive-visible {
  opacity: 1;
  transform: none;
}

.sh-tilt-card {
  transform-style: preserve-3d;
  transition: transform .2s cubic-bezier(.2,.75,.2,1),
              border-color .2s ease,
              box-shadow .2s ease,
              background-color .2s ease;
}
.sh-tilt-card.sh-tilting {
  transform: perspective(1000px) rotateX(var(--sh-tilt-x, 0deg)) rotateY(var(--sh-tilt-y, 0deg)) translateY(-3px);
  border-color: rgb(214 168 78 / 55%);
  box-shadow: 0 24px 50px rgb(0 0 0 / 22%), 0 0 0 1px rgb(214 168 78 / 8%);
}
.sh-tilt-card > * { backface-visibility: hidden; }

a, button, input[type="button"], input[type="submit"], [role="button"] {
  -webkit-tap-highlight-color: transparent;
}
main a:focus-visible,
main button:focus-visible,
footer a:focus-visible {
  outline: 2px solid var(--sh-gold-light);
  outline-offset: 3px;
}
button, input[type="button"], input[type="submit"], [role="button"] {
  transition: box-shadow .18s ease, border-color .18s ease, filter .18s ease, transform .18s ease;
}
@media (hover: hover) and (pointer: fine) {
  main button:hover,
  main input[type="button"]:hover,
  main input[type="submit"]:hover,
  main a[role="button"]:hover {
    filter: brightness(1.045);
  }
}
main button:active,
main input[type="button"]:active,
main input[type="submit"]:active,
main a[role="button"]:active {
  filter: brightness(.98);
}
button:disabled, input:disabled, [aria-disabled="true"] {
  cursor: not-allowed;
}

@media (max-width: 640px) {
  #home .shield-3d-hero {
    top: 40px;
    right: 8px;
    width: 84px;
    opacity: .22;
  }
  #shield-back-to-top { width: 42px; height: 42px; border-radius: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  .sh-interactive-reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  html { scroll-behavior: auto !important; }
  #shield-back-to-top,
  .sh-tilt-card,
  button, input[type="button"], input[type="submit"], [role="button"] {
    transition: none !important;
    animation: none !important;
  }
  .sh-tilt-card.sh-tilting { transform: none !important; }
}