/* 03-components.css · Shared components: buttons, glass surfaces (spotlight + lit border)
   Part of the Lumen stylesheet, loaded in numeric order (the cascade depends on it). */

/* ══════════ BUTTONS ══════════ */
.btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  min-height: 3rem;
  padding: .85rem 1.65rem;
  border-radius: var(--pill);
  border: 1px solid transparent;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--white);
  translate: var(--tx, 0px) var(--ty, 0px);
  transition: color var(--d-fast), box-shadow .4s var(--ease), translate .4s var(--ease);
}
.btn .icon {
  width: 16px;
  height: 16px;
  transition: transform .3s var(--ease);
}
.btn:hover .icon { transform: translateX(3px); }
/* primary · Aura's shiny CTA in ember: a conic light circles the border; hover pours the flame in */
.btn--fill, .btn--solid {
  color: var(--accent-2);
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    conic-gradient(from var(--angle), rgba(253, 186, 116, .22) 0%, var(--accent) 7%, #fff7ed 13%, var(--accent) 20%, rgba(253, 186, 116, .22) 32%, rgba(253, 186, 116, .22) 100%) border-box;
  box-shadow: 0 0 34px -12px rgba(253, 186, 116, .55);
  animation: border-spin 3.6s linear infinite;
}
.btn--fill::before, .btn--solid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(95deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .6s var(--ease-expo);
}
.btn--fill::after, .btn--solid::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 1.5px 1.5px, rgba(255, 237, 213, .5) .6px, transparent 0) 0 0 / 5px 5px;
  -webkit-mask-image: conic-gradient(from calc(var(--angle) + 45deg), #000, transparent 12% 88%, #000);
  mask-image: conic-gradient(from calc(var(--angle) + 45deg), #000, transparent 12% 88%, #000);
  opacity: .35;
}
.btn--fill:hover, .btn--solid:hover {
  color: var(--bg);
  box-shadow: 0 0 46px -8px rgba(253, 186, 116, .7);
}
.btn--fill:hover::before, .btn--solid:hover::before { transform: scaleX(1); }
@keyframes border-spin {
  to { --angle: 360deg; }
}
/* secondary · Fluxora glass pill, lifts on a pool of blue light */
.btn--ghost, .btn--outline {
  color: var(--text);
  background:
    linear-gradient(rgba(10, 16, 36, .7), rgba(10, 16, 36, .7)) padding-box,
    var(--hairline-strong) border-box;
}
.btn--ghost:hover, .btn--outline:hover {
  color: var(--white);
  translate: var(--tx, 0px) calc(var(--ty, 0px) - 2px);
  box-shadow: 0 14px 34px -14px rgba(56, 189, 248, .6);
}
.btn--sm {
  min-height: 2.75rem;
  padding: .65rem 1.25rem;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}
.link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding-bottom: .35rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-2);
  transition: color .3s;
}
.link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line-3);
}
.link::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  z-index: 1;
  background: var(--dawn);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .5s var(--ease-expo);
}
.link:hover { color: var(--white); }
.link:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}
.link .icon {
  width: 14px;
  height: 14px;
  transition: transform .3s var(--ease);
}
.link:hover .icon { transform: rotate(45deg); }

/* ══════════ SURFACES ══════════
   One glass recipe for every panel: dark base + 225° veil, a gradient hairline drawn by a mask,
   and a spotlight that follows the cursor (--mx/--my set by script; --spot-c fades in on hover). */
.glass, .cap, .step {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius);
  background:
    radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), var(--spot-c), transparent 62%),
    var(--veil),
    var(--glass-base);
  box-shadow: 0 24px 60px -40px rgba(0, 0, 0, .9);
  transition: --spot-c .5s var(--ease), box-shadow .5s var(--ease), translate .5s var(--ease);
}
.glass::after, .cap::after, .step::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  background: var(--hairline);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: opacity .5s var(--ease);
}
/* hover only where a pointer can hover: a tap would otherwise latch the glow on touch screens */
@media (hover: hover) {
  .glass:hover, .cap:hover, .step:hover {
    --spot-c: rgba(56, 189, 248, .13);
    box-shadow: var(--shadow-glow);
  }
  a.glass:hover { translate: 0 -3px; }
}
/* panels: the hairline lights up where the cursor is (--mx/--my in px, set by the glass spotlight script) */
.glass::before, .cap::before, .step::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), var(--ice), rgba(56, 189, 248, .65) 32%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .5s var(--ease);
}
@media (hover: hover) {
  .glass:hover::before, .cap:hover::before, .step:hover::before { opacity: 1; }
}