/* background.css — MAGMA canvas background (COLOR-TUNED to your roots)
   Requires: your root vars already exist:
   --bg-carbon, --lancaster-cream, --caramel-amber, --soft-ivory
*/

/* =========================
   1) PALETTE CONTROLS
   (edit these only)
========================= */
:root{
  /* Mode + base */
  --magma-mode: dark;
  --magma-bg: var(--bg-carbon);
  --magma-accent: var(--caramel-amber);
  --magma-ember: var(--soft-ivory);

  /* Luxe “cocoa” tones (darker + richer than before) */
--magma-choc-dark: #241410;
--magma-choc-mid:  #4b2a1d;
--magma-choc-hi:   #8a4b2c;

  /* Overlay strength (dark) */
  --magma-overlay-top: 0.22;
  --magma-overlay-mid: 0.72;
  --magma-overlay-bot: 0.90;

  --magma-glow-a: 0.14; /* accent glow */
  --magma-glow-b: 0.06; /* soft ivory glow */
}

body.theme-light{
  --magma-mode: light;
  --magma-bg: var(--lancaster-cream);
  --magma-accent: var(--caramel-amber);
  --magma-ember: #ffffff;

  /* On cream, we lift the cocoa slightly so it shows nicely */
  --magma-choc-dark: #2a1410;  /* warm cocoa */
  --magma-choc-mid:  #5a2b18;  /* milk-truffle */
  --magma-choc-hi:   #b06a3c;  /* toffee */

  /* Overlay strength (light) */
  --magma-overlay-top: 0.06;
  --magma-overlay-mid: 0.18;
  --magma-overlay-bot: 0.32;

  --magma-glow-a: 0.10;
  --magma-glow-b: 0.03;
}

/* =========================
   2) HERO LAYERING
========================= */
.hero{
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: var(--magma-bg);
}

/* Canvas layer */
.magma-bg{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Default overlay fallback (works everywhere) */
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index: 1;
  background:
    radial-gradient(1000px 600px at 70% 40%, rgba(210,155,74,0.12), transparent 60%),
    radial-gradient(900px 540px at 30% 30%, rgba(255,255,255,0.05), transparent 60%),
    linear-gradient(180deg,
      rgba(0,0,0,var(--magma-overlay-top)),
      rgba(0,0,0,var(--magma-overlay-mid)) 62%,
      rgba(0,0,0,var(--magma-overlay-bot))
    );
  pointer-events:none;
}

/* If supported, use your accent var in the overlay (so it matches palette changes) */
@supports (background: color-mix(in srgb, red 50%, transparent)){
  .hero::after{
    background:
      radial-gradient(1000px 600px at 70% 40%,
        color-mix(in srgb, var(--magma-accent) 18%, transparent), transparent 60%
      ),
      radial-gradient(900px 540px at 30% 30%,
        color-mix(in srgb, var(--magma-ember) 10%, transparent), transparent 60%
      ),
      linear-gradient(180deg,
        rgba(0,0,0,var(--magma-overlay-top)),
        rgba(0,0,0,var(--magma-overlay-mid)) 62%,
        rgba(0,0,0,var(--magma-overlay-bot))
      );
  }
}

/* Ensure hero content above */
.hero > *:not(.magma-bg){
  position: relative;
  z-index: 2;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  .magma-bg{ display:none; }
}

/* Option A — Invite banner */
.contest-section.invite{
  padding: 110px 10%;
  background: var(--lancaster-cream);
  color: var(--bg-carbon);
}

.invite-wrap{
  max-width: 1100px;
  margin: 0 auto;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.10);
  box-shadow: 0 18px 55px rgba(0,0,0,0.14);
  background:
    radial-gradient(1200px 420px at 20% 0%, rgba(210,155,74,0.26), transparent 60%),
    radial-gradient(900px 360px at 90% 100%, rgba(0,0,0,0.08), transparent 55%),
    rgba(255,255,255,0.72);
  backdrop-filter: blur(10px);
}

.invite-wrap{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
}

.invite-left{
  padding: 52px 46px;
}

.invite-left h2{
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 4.3vw, 3.1rem);
  margin: 10px 0 14px;
}

.invite-left p{
  font-family: var(--font-body);
  line-height: 1.75;
  font-size: 1.05rem;
  max-width: 70ch;
  opacity: .95;
}

.invite-tags{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.invite-tags span{
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  border: 1px solid rgba(0,0,0,0.12);
  background: rgba(255,255,255,0.55);
}

.invite-right{
  padding: 24px;
  display:flex;
  align-items: stretch;
}

.invite-box{
  width: 100%;
  border-radius: 22px;
  padding: 26px 22px;
  background: rgba(11,11,12,0.92);
  color: var(--soft-ivory);
  border: 1px solid rgba(255,255,255,0.10);
  display:flex;
  flex-direction: column;
  gap: 14px;
}

.invite-box h3{
  font-family: var(--font-heading);
  font-size: 1.35rem;
  margin: 0;
}

.invite-box .small{
  opacity: .9;
  line-height: 1.6;
  font-size: .95rem;
  margin: 0;
}

.invite-box .btn{
  width: fit-content;
}

.btn.btn-ghost{
  background: transparent;
  border: 1px solid rgba(255,255,255,0.28);
  color: var(--soft-ivory);
  padding: 12px 18px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.75rem;
}

.btn.btn-ghost:hover{
  border-color: rgba(255,255,255,0.42);
  transform: translateY(-1px);
}

.invite-foot{
  margin-top: auto;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  opacity: .85;
  font-size: .82rem;
}

.invite-foot span{
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
}

@media (max-width: 900px){
  .invite-wrap{ grid-template-columns: 1fr; }
  .invite-left{ padding: 40px 26px; }
  .invite-right{ padding: 18px; }
}