/* Exam Result Button styles (namespaced: erb-*) */
:root {
  --erb-bg-start: #2563eb; /* blue-600 */
  --erb-bg-end:   #1d4ed8; /* blue-700 */
  --erb-hover:    #1e40af; /* blue-800 */
  --erb-ring:     rgba(37, 99, 235, 0.35);
  --erb-text:     #ffffff;
  --erb-sub:      rgba(255,255,255,0.85);
  --erb-shadow:   0 10px 20px rgba(0,0,0,.15), 0 6px 6px rgba(0,0,0,.10);
  --erb-shadow-h: 0 14px 24px rgba(0,0,0,.20), 0 8px 8px rgba(0,0,0,.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --erb-bg-start: #3b82f6; /* blue-500 */
    --erb-bg-end:   #2563eb; /* blue-600 */
    --erb-hover:    #1d4ed8; /* blue-700 */
    --erb-ring:     rgba(59, 130, 246, 0.45);
    --erb-sub:      rgba(255,255,255,0.9);
  }
}

.erb-cta-wrap {
  width: 100%;
  margin: 1.25rem 0;
  display: flex;
}

.erb-align-left  { justify-content: flex-start; }
.erb-align-center{ justify-content: center; }
.erb-align-right { justify-content: flex-end; }

.erb-cta {
  display: inline-flex;
  align-items: center;
  gap: .9rem;
  text-decoration: none;
  background-image: linear-gradient(135deg, var(--erb-bg-start), var(--erb-bg-end));
  color: var(--erb-text);
  border-radius: .875rem;
  box-shadow: var(--erb-shadow);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  position: relative;
  isolation: isolate;
  white-space: nowrap;
}

.erb-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--erb-shadow-h);
  filter: saturate(1.05);
}

.erb-cta:active {
  transform: translateY(0);
  filter: saturate(0.98);
}

.erb-cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 .25rem var(--erb-ring), var(--erb-shadow-h);
}

.erb-icon, .erb-ext {
  width: 1.4em;
  height: 1.4em;
  flex: 0 0 auto;
  fill: currentColor;
  opacity: .95;
}

.erb-ext {
  width: 1.1em;
  height: 1.1em;
  opacity: .9;
  margin-inline-start: .25rem;
}

.erb-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
}

.erb-label {
  font-weight: 700;
  letter-spacing: .2px;
}

.erb-sub {
  font-size: .82em;
  opacity: .95;
  color: var(--erb-sub);
  margin-top: .1em;
}

/* Sizes */
.erb-size-sm { padding: .55rem .9rem; font-size: .92rem; }
.erb-size-md { padding: .70rem 1.05rem; font-size: 1rem; }
.erb-size-lg { padding: .95rem 1.25rem; font-size: 1.08rem; }
.erb-size-xl { padding: 1.15rem 1.45rem; font-size: 1.2rem; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .erb-cta { transition: none; }
  .erb-cta:hover, .erb-cta:active { transform: none; }
}