*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --sega-dark:#000011;
  --sega-blue1:#0000AA;
  --sega-blue2:#0044FF;
  --sega-blue3:#0066CC;
  --sega-gold:#FFD700;
  --sega-white:#E8E8E8;
  --sega-red:#CC0000;
  --sega-green:#00AA44;
  --crt-bg:#111118;
  --bezel:#1a1a2e;
}

body{
  background:var(--sega-dark);
  color:var(--sega-white);
  font-family:'Press Start 2P',monospace;
  min-height:100vh;
  overflow-x:hidden;
}

#app{
  max-width:1200px;
  margin:0 auto;
  padding:0 16px 40px;
}

/* HEADER */
#header{
  position:relative;
  text-align:center;
  padding:32px 16px 24px;
  background:linear-gradient(135deg,var(--sega-blue1) 0%,var(--sega-blue2) 50%,var(--sega-blue1) 100%);
  border-bottom:4px solid var(--sega-gold);
  overflow:hidden;
  margin:0 -16px;
}
#header .scanline-overlay{
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.15) 2px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events:none;
  animation:scanlineScroll 8s linear infinite;
}
@keyframes scanlineScroll{
  from{transform:translateY(0)}
  to{transform:translateY(4px)}
}
#header h1{
  font-size:clamp(16px,5vw,36px);
  color:#fff;
  text-shadow:3px 3px 0 #000,0 0 20px rgba(0,68,255,0.8);
  letter-spacing:2px;
  position:relative;
  z-index:1;
}
.subtitle{
  font-size:clamp(7px,2vw,11px);
  color:var(--sega-gold);
  margin-top:10px;
  position:relative;
  z-index:1;
  text-shadow:1px 1px 0 #000;
}

/* CARTRIDGE SLOT */
.cartridge-slot{
  margin:32px auto;
  max-width:500px;
  background:#0a0a14;
  border:3px solid #222240;
  border-radius:8px;
  padding:6px;
  box-shadow:
    inset 0 4px 12px rgba(0,0,0,0.8),
    0 0 30px rgba(0,68,255,0.15);
  cursor:pointer;
  transition:box-shadow 0.3s;
}
.cartridge-slot:hover,.cartridge-slot.dragover{
  box-shadow:
    inset 0 4px 12px rgba(0,0,0,0.8),
    0 0 50px rgba(0,68,255,0.4);
}
.slot-inner{
  border:2px dashed #333366;
  border-radius:4px;
  padding:40px 20px;
  text-align:center;
  transition:border-color 0.3s;
}
.cartridge-slot.dragover .slot-inner{
  border-color:var(--sega-gold);
}
.slot-label{
  font-size:clamp(10px,3vw,16px);
  color:var(--sega-gold);
  margin-bottom:12px;
  animation:blink 2s steps(1) infinite;
}
@keyframes blink{
  0%,80%{opacity:1}
  50%,70%{opacity:0.3}
}
.slot-sublabel{
  font-size:8px;
  color:#667;
  margin-bottom:16px;
}
.load-btn{
  display:inline-block;
  font-family:'Press Start 2P',monospace;
  font-size:10px;
  background:linear-gradient(180deg,#CC0000,#880000);
  color:#fff;
  padding:12px 24px;
  border-radius:20px;
  cursor:pointer;
  border:2px solid #FF4444;
  text-shadow:1px 1px 0 #000;
  transition:transform 0.1s,box-shadow 0.1s;
  box-shadow:0 4px 0 #440000,0 0 15px rgba(204,0,0,0.3);
}
.load-btn:hover{
  transform:translateY(1px);
  box-shadow:0 3px 0 #440000,0 0 25px rgba(204,0,0,0.5);
}
.load-btn:active{
  transform:translateY(3px);
  box-shadow:0 1px 0 #440000;
}

/* PREVIEW */
#preview-area{
  display:flex;
  gap:20px;
  justify-content:center;
  align-items:flex-start;
  flex-wrap:wrap;
  margin:24px 0;
}
.crt-wrapper{
  flex:1 1 400px;
  max-width:560px;
  min-width:280px;
}
.crt-label{
  font-size:9px;
  color:var(--sega-gold);
  text-align:center;
  margin-bottom:6px;
  text-shadow:0 0 8px rgba(255,215,0,0.5);
}
.crt-bezel{
  position:relative;
  background:#080812;
  border-radius:16px;
  padding:12px;
  border:3px solid #1a1a2e;
  box-shadow:
    inset 0 0 40px rgba(0,0,0,0.9),
    0 0 20px rgba(0,0,30,0.8),
    0 8px 24px rgba(0,0,0,0.6);
  overflow:hidden;
}
.crt-bezel canvas{
  display:block;
  width:100%;
  border-radius:4px;
  image-rendering:pixelated;
  image-rendering:crisp-edges;
}
.crt-scanlines{
  position:absolute;
  inset:12px;
  border-radius:4px;
  background:repeating-linear-gradient(
    0deg,
    transparent,
    transparent 1px,
    rgba(0,0,0,0.25) 1px,
    rgba(0,0,0,0.25) 2px
  );
  pointer-events:none;
  opacity:0;
  transition:opacity 0.3s;
}
.crt-scanlines.active{
  opacity:1;
}

/* CONTROLS */
#controls-panel{
  margin:24px auto;
  max-width:900px;
  background:linear-gradient(180deg,#0c0c20 0%,#080818 100%);
  border:2px solid #222240;
  border-radius:8px;
  padding:20px;
  box-shadow:0 0 20px rgba(0,0,30,0.5);
}
.controls-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:16px;
}
.control-group{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.control-group label{
  font-size:8px;
  color:var(--sega-blue2);
  text-shadow:0 0 6px rgba(0,68,255,0.4);
}
.control-group select{
  font-family:'Press Start 2P',monospace;
  font-size:8px;
  background:#0a0a1a;
  color:var(--sega-white);
  border:2px solid #333366;
  border-radius:4px;
  padding:8px;
  cursor:pointer;
  outline:none;
}
.control-group select:focus{
  border-color:var(--sega-gold);
}
.slider-row{
  display:flex;
  align-items:center;
  gap:8px;
}
.slider-val{
  font-size:8px;
  color:var(--sega-gold);
  min-width:48px;
  text-align:right;
}
input[type=range]{
  -webkit-appearance:none;
  flex:1;
  height:8px;
  background:#1a1a3e;
  border-radius:4px;
  outline:none;
  border:1px solid #333366;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:16px;height:16px;
  background:linear-gradient(180deg,var(--sega-blue2),var(--sega-blue1));
  border:2px solid #6688FF;
  border-radius:2px;
  cursor:pointer;
  box-shadow:0 0 6px rgba(0,68,255,0.5);
}
input[type=range]::-moz-range-thumb{
  width:16px;height:16px;
  background:linear-gradient(180deg,var(--sega-blue2),var(--sega-blue1));
  border:2px solid #6688FF;
  border-radius:2px;
  cursor:pointer;
}
.toggle-btn{
  font-family:'Press Start 2P',monospace;
  font-size:8px;
  padding:8px 16px;
  background:#1a1a3e;
  color:#667;
  border:2px solid #333366;
  border-radius:4px;
  cursor:pointer;
  transition:all 0.2s;
  width:fit-content;
}
.toggle-btn.active{
  background:var(--sega-blue1);
  color:#fff;
  border-color:var(--sega-blue2);
  box-shadow:0 0 10px rgba(0,68,255,0.4);
}

/* ACTION BUTTONS */
.action-buttons{
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
  margin-top:24px;
}
.sega-btn{
  font-family:'Press Start 2P',monospace;
  font-size:10px;
  padding:14px 24px;
  border:none;
  border-radius:24px;
  cursor:pointer;
  color:#fff;
  text-shadow:1px 1px 0 #000;
  transition:transform 0.1s,box-shadow 0.1s;
  position:relative;
}
.sega-btn:active{
  transform:translateY(3px);
}
.btn-process{
  background:linear-gradient(180deg,#00CC44,#008822);
  border:2px solid #44FF88;
  box-shadow:0 4px 0 #004411,0 0 20px rgba(0,204,68,0.3);
  font-size:12px;
}
.btn-process:active{box-shadow:0 1px 0 #004411}
.btn-process:hover{box-shadow:0 4px 0 #004411,0 0 35px rgba(0,204,68,0.5)}
.btn-download{
  background:linear-gradient(180deg,var(--sega-blue2),var(--sega-blue1));
  border:2px solid #6688FF;
  box-shadow:0 4px 0 #000044,0 0 15px rgba(0,68,255,0.3);
}
.btn-download:active{box-shadow:0 1px 0 #000044}
.btn-reset{
  background:linear-gradient(180deg,#AA0000,#660000);
  border:2px solid #FF4444;
  box-shadow:0 4px 0 #330000,0 0 15px rgba(204,0,0,0.3);
}
.btn-reset:active{box-shadow:0 1px 0 #330000}

/* PROCESSING ANIMATION */
.processing .crt-bezel{
  animation:flicker 0.15s steps(2) 3;
}
@keyframes flicker{
  0%,100%{opacity:1}
  50%{opacity:0.7}
}

/* FOOTER */
footer{
  text-align:center;
  margin-top:40px;
  padding:20px;
  font-size:7px;
  color:#445;
  line-height:1.8;
  border-top:1px solid #1a1a2e;
}
footer a{
  color:var(--sega-blue2);
  text-decoration:none;
  display:inline-block;
  margin-top:8px;
  font-size:8px;
}
footer a:hover{
  color:var(--sega-gold);
}

/* MOBILE */
@media(max-width:640px){
  #preview-area{flex-direction:column;align-items:center}
  .crt-wrapper{width:100%;max-width:100%}
  .controls-grid{grid-template-columns:1fr}
  .action-buttons{flex-direction:column;align-items:stretch}
  .sega-btn{text-align:center}
}