:root{
  --sg-bg: #05070c;
  --sg-ink: #eaf0ff;
  --sg-muted: rgba(234,240,255,.70);
  --sg-line: rgba(255,255,255,.12);
  --sg-panel: rgba(12,16,24,.78);
  --sg-panel2: rgba(10,14,22,.66);
  --sg-accent: #3b7bff;
  --sg-accent2:#1f4fff;
  --sg-good:#35d07f;
  --sg-warn:#ffcc66;
  --sg-bad:#ff5a6a;

  /* Images (you will drop real files later)
     - assets/ui/bg/lobby.webp
     - assets/ui/bg/campaign.webp
  */
  --sg-bg-image: url('./bg/lobby.webp');
  --sg-hero-image: url('./bg/lobby.webp');
  --sg-campaign-image: url('./bg/campaign.webp');
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body.sg{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", Arial, sans-serif;
  color:var(--sg-ink);
  background: var(--sg-bg);
  overflow:hidden;
}

.sg-bg{
  position:fixed; inset:0;
  background-image: var(--sg-bg-image);
  background-size:cover;
  background-position:center;
  filter: saturate(.95) contrast(1.05);
  transform: scale(1.02);
}
.sg-bg::before{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(900px 520px at 18% 12%, rgba(59,123,255,.22), transparent 60%),
    radial-gradient(780px 520px at 78% 88%, rgba(53,208,127,.10), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.05), transparent 35%),
    linear-gradient(90deg, rgba(0,0,0,.82) 0%, rgba(0,0,0,.60) 34%, rgba(0,0,0,.26) 62%, rgba(0,0,0,.18) 100%);
}
.sg-bg::after{
  content:"";
  position:absolute; inset:0;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,.035) 0 1px, transparent 1px 10px);
  opacity:.30;
  mix-blend-mode: overlay;
}

.sg-shell{
  position:relative;
  height:100%;
  display:grid;
  grid-template-rows: auto 1fr auto;
}

.sg-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:18px 22px;
}

.sg-brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-weight:900;
  letter-spacing:.12em;
  text-transform:uppercase;
  font-size:14px;
}

.sg-tag{
  font-weight:800;
  letter-spacing:.08em;
  font-size:11px;
  color:rgba(234,240,255,.85);
  padding:5px 10px;
  border-radius:999px;
  border:1px solid var(--sg-line);
  background:rgba(0,0,0,.25);
}

.sg-main{
  display:grid;
  grid-template-columns: 330px 1fr;
  gap:18px;
  padding:0 22px 18px;
  min-height:0;
}

@media (max-width: 980px){
  body.sg{ overflow:auto; }
  .sg-shell{ overflow:auto; }
  .sg-main{ grid-template-columns: 1fr; }
}

.sg-nav{
  border:1px solid var(--sg-line);
  background: linear-gradient(180deg, var(--sg-panel), var(--sg-panel2));
  border-radius:18px;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  min-height:0;
}

.sg-navHead{
  padding:14px 14px 12px;
  border-bottom:1px solid rgba(255,255,255,.10);
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.sg-navHead .hint{
  color:rgba(234,240,255,.55);
  font-size:12px;
  font-weight:700;
}

.sg-navList{ padding:10px; display:flex; flex-direction:column; gap:8px; overflow:auto; }

.sg-groupLabel{
  margin:10px 6px 2px;
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(234,240,255,.55);
  font-weight:900;
}

.sg-item{
  width:100%;
  text-align:left;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.18);
  color:var(--sg-ink);
  padding:12px 12px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  transition: transform .08s ease, border-color .12s ease, background .12s ease;
  user-select:none;
}

.sg-item:hover{ transform: translateY(-1px); border-color: rgba(255,255,255,.22); }
.sg-item:active{ transform: translateY(0px); }

.sg-item .label{
  font-weight:900;
  letter-spacing:.02em;
}
.sg-item .sub{
  color:rgba(234,240,255,.62);
  font-size:12px;
  margin-top:4px;
}
.sg-item .meta{
  font-weight:900;
  font-size:11px;
  letter-spacing:.12em;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.05);
  color:rgba(234,240,255,.85);
  text-transform:uppercase;
}

.sg-item.is-active{
  border-color: rgba(59,123,255,.75);
  background: rgba(59,123,255,.16);
  box-shadow: 0 0 0 2px rgba(59,123,255,.22) inset;
}

.sg-right{ min-height:0; display:grid; grid-template-rows: 1fr auto; gap:14px; }

.sg-hero{
  border:1px solid var(--sg-line);
  border-radius:18px;
  overflow:hidden;
  background-image: var(--sg-hero-image);
  background-size:cover;
  background-position:center;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
  position:relative;
  min-height:340px;
}
.sg-hero::before{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(0,0,0,.72) 0%, rgba(0,0,0,.42) 48%, rgba(0,0,0,.18) 100%),
    radial-gradient(800px 420px at 20% 30%, rgba(59,123,255,.18), transparent 60%),
    radial-gradient(700px 420px at 70% 75%, rgba(53,208,127,.10), transparent 60%);
}

.sg-heroContent{
  position:absolute;
  left:18px;
  bottom:16px;
  right:18px;
  display:grid;
  gap:8px;
}

.sg-heroTitle{
  font-size:34px;
  font-weight:950;
  letter-spacing:.02em;
  line-height:1.05;
}
.sg-heroDesc{ color:rgba(234,240,255,.72); font-size:14px; line-height:1.45; max-width:66ch; }
.sg-heroMeta{ display:flex; gap:10px; flex-wrap:wrap; align-items:center; }
.sg-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(0,0,0,.22);
  font-size:12px;
  font-weight:800;
  color:rgba(234,240,255,.80);
}

.sg-panels{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:14px;
}
@media (max-width: 980px){
  .sg-panels{ grid-template-columns: 1fr; }
}

.sg-panel{
  border:1px solid var(--sg-line);
  background: linear-gradient(180deg, rgba(12,16,24,.70), rgba(10,14,22,.58));
  border-radius:18px;
  box-shadow: 0 18px 60px rgba(0,0,0,.40);
  overflow:hidden;
}
.sg-panelTitle{
  padding:12px 14px;
  border-bottom:1px solid rgba(255,255,255,.10);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  font-weight:950;
  color:rgba(234,240,255,.75);
}
.sg-panelBody{ padding:12px 14px 14px; color:rgba(234,240,255,.78); font-size:13px; line-height:1.55; }
.sg-panelBody b{ color:rgba(234,240,255,.92); }

.sg-status{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 22px 18px;
  color:rgba(234,240,255,.62);
  font-size:12px;
}
.sg-status b{ color:rgba(234,240,255,.85); }

/* Modals */
.sg-overlay{
  position:fixed; inset:0;
  background:rgba(0,0,0,.60);
  display:none;
  align-items:center;
  justify-content:center;
  padding:18px;
  z-index:9998;
}
.sg-overlay.open{ display:flex; }
.sg-modal{
  width:min(820px, 96vw);
  max-height:calc(100vh - 36px);
  border-radius:18px;
  border:1px solid rgba(255,255,255,.12);
  background: linear-gradient(180deg, rgba(15,22,32,.96), rgba(10,14,22,.96));
  box-shadow: 0 24px 90px rgba(0,0,0,.60);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.sg-modalHeader{
  padding:14px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.sg-modalHeader .title{
  font-weight:950;
  letter-spacing:.10em;
  text-transform:uppercase;
  font-size:12px;
  color:rgba(234,240,255,.78);
}
.sg-iconBtn{
  width:40px; height:40px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  color:var(--sg-ink);
  cursor:pointer;
  font-weight:900;
}
.sg-modalBody{
  padding:16px;
  overflow:auto;
  -webkit-overflow-scrolling:touch;
  display:grid;
  gap:12px;
}

.sg-field{
  border:1px solid rgba(255,255,255,.12);
  border-radius:16px;
  padding:14px;
  background:rgba(0,0,0,.16);
}
.sg-fieldTitle{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
.sg-fieldTitle b{ font-weight:950; }
.sg-fieldTitle span{ color:rgba(234,240,255,.55); font-size:12px; }

.sg-row{ display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; }
.sg-input, .sg-select{
  width:100%;
  padding:10px 11px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(0,0,0,.22);
  color:var(--sg-ink);
}

.sg-btn{
  padding:10px 14px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  color:var(--sg-ink);
  font-weight:900;
  cursor:pointer;
}
.sg-btn.primary{ background: linear-gradient(180deg, var(--sg-accent), var(--sg-accent2)); border-color: rgba(59,123,255,.70); }
.sg-btn:disabled{ opacity:.5; cursor:not-allowed; }

.sg-audioHint{
  position:fixed;
  right:18px;
  top:18px;
  z-index:9999;
  padding:10px 12px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(0,0,0,.45);
  color:rgba(234,240,255,.82);
  font-size:12px;
  font-weight:800;
  display:none;
}
.sg-audioHint.show{ display:inline-flex; }