/* --- base / reset --- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, system-ui, -apple-system, Arial, sans-serif;
  color: rgba(255,255,255,0.9);
  background: #0a0b0e;
  overflow-x: hidden;
}

/* --- background: dark grain + subtle vignette --- */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 700px at 65% 25%, rgba(255,255,255,0.06), transparent 60%),
    radial-gradient(900px 600px at 25% 75%, rgba(255,255,255,0.05), transparent 62%),
    radial-gradient(1200px 900px at 50% 50%, transparent 55%, rgba(0,0,0,0.55) 100%),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.02), rgba(255,255,255,0.02) 1px, transparent 1px, transparent 3px);
  mix-blend-mode: overlay;
  opacity: 0.35;
}

/* optional “film speckle” feel */
body::after{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 18%, rgba(255,255,255,0.06) 0 1px, transparent 2px),
    radial-gradient(circle at 72% 44%, rgba(255,255,255,0.05) 0 1px, transparent 2px),
    radial-gradient(circle at 38% 66%, rgba(255,255,255,0.04) 0 1px, transparent 2px),
    radial-gradient(circle at 88% 78%, rgba(255,255,255,0.05) 0 1px, transparent 2px);
  opacity: 0.35;
  filter: blur(0.2px);
}

/* --- top bar --- */
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(to bottom, rgba(18,19,26,0.9), rgba(10,11,14,0.75));
  backdrop-filter: blur(8px);
}

.brand{
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: none;
  opacity: 0.95;
}

/* --- nav buttons --- */
.nav { display: flex; gap: 10px; align-items: stretch; }

.navbtn{
  display: grid;
  align-content: center;
  gap: 2px;
  padding: 10px 12px;
  min-width: 132px;
  text-decoration: none;
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 8px 24px rgba(0,0,0,0.35);
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.navbtn:hover{
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.22);
  background: linear-gradient(to bottom, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
}

.navbtn.active{
  border-color: rgba(255,255,255,0.28);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.10),
    0 10px 26px rgba(0,0,0,0.45);
}

.navbtn-title{
  font-weight: 700;
  letter-spacing: 0.2px;
}

.navbtn-sub{
  font-size: 12px;
  opacity: 0.72;
  letter-spacing: 0.3px;
}

/* --- main stage --- */
.stage{
  position: relative;
  padding: 22px 18px 30px;
  max-width: 1100px;
  margin: 0 auto;
}

.grid{
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "ul ur"
    "ll lr";
}

.panel-ul { grid-area: ul; }
.panel-ur { grid-area: ur; }
.panel-ll { grid-area: ll; }
.panel-lr { grid-area: lr; }

/* --- poster-inspired rings (subtle) --- */
.rings{
  position: absolute;
  inset: -40px -40px auto auto;
  width: 560px;
  height: 560px;
  opacity: 0.55;
  pointer-events: none;
  filter: blur(0.2px);
  mask-image: radial-gradient(circle at 50% 50%, rgba(0,0,0,1) 40%, rgba(0,0,0,0) 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, rgba(0,0,0,1) 40%, rgba(0,0,0,0) 72%);
}

.rings::before{
  content:"";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, transparent 56%, rgba(255,255,255,0.04) 57%, transparent 58%),
    radial-gradient(circle at 50% 50%, transparent 61%, rgba(255,255,255,0.04) 62%, transparent 63%),
    radial-gradient(circle at 50% 50%, transparent 66%, rgba(255,255,255,0.04) 67%, transparent 68%),
    radial-gradient(circle at 50% 50%, transparent 71%, rgba(255,255,255,0.04) 72%, transparent 73%),
    conic-gradient(from 180deg,
      rgba(255,80,80,0.75),
      rgba(255,200,80,0.75),
      rgba(120,255,170,0.70),
      rgba(90,220,255,0.70),
      rgba(160,130,255,0.65),
      rgba(255,80,80,0.75)
    );
  mix-blend-mode: screen;
  opacity: 0.85;
}

/* --- panels (Vista-ish glass) --- */
.panel{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.10);
  background: linear-gradient(to bottom, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 14px 34px rgba(0,0,0,0.40);
  overflow: hidden;
}

.panel-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.78);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(to bottom, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
}

.panel-body{
  padding: 14px 14px 16px;
  min-height: 170px;
}

.panel-text .panel-body{
  font-size: 18px;
  line-height: 1.35;
}

/* media placeholders */
.media{
  display: grid;
  place-items: center;
  padding: 0;
}

.media img{
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  min-height: 170px;
  filter: contrast(1.05) saturate(1.02);
}

/* --- footer --- */
.footer{
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 18px 18px;
  opacity: 0.72;
  display: flex;
  gap: 10px;
  align-items: center;
}
.sep{ opacity: 0.5; }

/* --- responsive --- */
@media (max-width: 820px){
  .topbar{ flex-direction: column; align-items: flex-start; }
  .nav{ width: 100%; flex-wrap: wrap; }
  .navbtn{ flex: 1; min-width: 160px; }

  .grid{
    grid-template-columns: 1fr;
    grid-template-areas:
      "ul"
      "ur"
      "ll"
      "lr";
  }
  .rings{ inset: -80px -160px auto auto; opacity: 0.40; }
}