:root{
  --bg:#0c0c0c;
  --bg2:#151515;
  --card:#1b1b1b;
  --line:#3a3320;
  --gold:#d4af37;
  --gold2:#f2d98b;
  --txt:#f3efe2;
  --muted:#b7ab8a;
  --ok:#3abf7a;
  --err:#ef5350;
  --r:12px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,sans-serif;background:radial-gradient(circle at 15% 15%,#242017 0%,var(--bg) 45%),linear-gradient(145deg,var(--bg),var(--bg2));color:var(--txt);min-height:100vh}
.hidden{display:none !important}

.u-view{min-height:100vh}
#u-login-view{display:flex;align-items:center;justify-content:center}
.u-login-card{width:min(420px,92vw);margin:0;background:linear-gradient(180deg,#221f16,#191919);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:28px;animation:floatIn .45s ease;text-align:center}
.u-logo{width:54px;height:54px;border-radius:12px;background:linear-gradient(135deg,#5a4a1f,var(--gold));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:24px;color:#111;margin:0 auto 10px}
.u-login-card h1{margin:0;font-size:24px}
.u-login-card p{margin:6px 0 16px;color:var(--muted)}
.u-login-card .u-field{text-align:left}
#u-login-btn{width:100%}
.u-mode{display:flex;gap:8px;margin-bottom:14px}
.u-mode button{flex:1;padding:10px;border-radius:10px;border:1px solid var(--line);background:#191919;color:var(--muted);cursor:pointer}
.u-mode button.active{background:linear-gradient(135deg,#3a311c,#5d4f27);color:var(--gold2);border-color:#7a6933}
.u-field{margin-bottom:12px}
.u-field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.u-field input{width:100%;padding:11px 12px;background:#111;border:1px solid var(--line);border-radius:10px;color:var(--txt);font-family:inherit;font-size:14px}
.u-field input:focus{outline:none;border-color:var(--gold)}
#merge-code{flex:1;padding:11px 12px;background:#111;border:1px solid var(--line);border-radius:10px;color:var(--txt);font-family:inherit;font-size:14px}
#merge-code:focus{outline:none;border-color:var(--gold)}
.u-btn{border:1px solid var(--line);background:#171717;color:var(--txt);padding:10px 14px;border-radius:10px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;font-family:inherit;font-size:14px;transition:opacity .15s}
.u-btn:disabled{opacity:.45;cursor:not-allowed}
.u-btn-pri{background:linear-gradient(135deg,#7f6b2c,var(--gold));color:#16120a;border-color:#a98a34;font-weight:600}
.u-err{color:var(--err);font-size:13px}

.u-top{height:58px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(10,10,10,.75);backdrop-filter:blur(8px);position:sticky;top:0;z-index:3}
.u-brand{font-weight:700;display:flex;align-items:center;gap:8px;color:var(--gold2)}
.u-logo-sm{width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,#5a4a1f,var(--gold));color:#111;display:inline-flex;align-items:center;justify-content:center;font-size:12px}

.u-main{max-width:1100px;margin:0 auto;padding:18px}
.u-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.u-span2{grid-column:span 2}
.u-card{background:linear-gradient(180deg,#1a1a1a,#141414);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow)}
.u-card h2{margin:0 0 10px;color:var(--gold2);font-size:18px}
.u-kv{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.u-kv li{display:flex;justify-content:space-between;gap:14px;border-bottom:1px dashed #3a3320;padding-bottom:6px}
.u-kv span{color:var(--muted);font-size:13px}
.u-kv strong{font-family:Consolas,monospace;font-size:13px;text-align:right}
.u-muted{color:var(--muted);font-size:13px}
.u-actions{display:flex;gap:10px;margin-top:10px}
.u-placeholder{padding:14px;border:1px dashed #4c4122;border-radius:10px;color:var(--muted);font-size:13px;background:rgba(212,175,55,.05)}
.u-inline{display:flex;gap:10px;margin-top:8px}
.u-msg{min-height:20px;color:var(--muted);font-size:13px;margin-top:8px}
.u-msg-ok{color:var(--ok)}
.u-msg-err{color:var(--err)}

.reveal{opacity:0;transform:translateY(8px);animation:reveal .5s ease forwards}
.reveal:nth-child(2){animation-delay:.06s}
.reveal:nth-child(3){animation-delay:.12s}
.reveal:nth-child(4){animation-delay:.18s}
.reveal:nth-child(5){animation-delay:.24s}
.reveal:nth-child(6){animation-delay:.30s}
.reveal:nth-child(7){animation-delay:.36s}

@keyframes floatIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes reveal{to{opacity:1;transform:translateY(0)}}

@media (max-width: 900px){
  .u-grid{grid-template-columns:1fr}
  .u-span2{grid-column:span 1}
  .u-inline{flex-direction:column}
}