/* A/B Test Readout - Dark theme */
:root{
  --bg:#0b0e12; --surface:#12161c; --muted:#9098a6; --text:#eef2f7; --card:#141a22; --border:#1f2733; --accent:#3b82f6; --accent-2:#60a5fa; --good:#10b981; --warn:#f59e0b; --error:#ef4444;
  --radius:12px; --shadow:0 8px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:linear-gradient(180deg,#0b0e12 0%,#0b0f14 40%,#0b0e12 100%);color:var(--text);font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji"}
img{max-width:100%;display:block}

.app-header{display:flex;justify-content:space-between;align-items:center;padding:18px clamp(16px,4vw,36px);border-bottom:1px solid var(--border);background:rgba(18,22,28,.6);backdrop-filter:saturate(140%) blur(8px);position:sticky;top:0;z-index:10}
.brand{display:flex;gap:12px;align-items:center}
.logo{filter:drop-shadow(0 2px 6px rgba(59,130,246,.35))}
.app-title{font-weight:700;letter-spacing:.2px}
.app-subtitle{font-size:12px;color:var(--muted)}
.meta{display:flex;gap:8px;align-items:center}
.badge{background:#0f1722;border:1px solid var(--border);color:var(--muted);padding:6px 10px;border-radius:999px;font-size:12px}

.container{max-width:1000px;margin:28px auto;padding:0 clamp(12px,4vw,24px)}
.card{background:linear-gradient(180deg,#12161c, #0f141a);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:20px}
.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.card-actions{display:flex;gap:8px;align-items:center}
.card-sub{margin-top:12px;padding-top:12px;border-top:1px dashed var(--border)}

.form .grid{display:grid;grid-template-columns:repeat(2, minmax(0, 1fr));gap:16px}
@media (max-width:720px){.form .grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field.toggle{justify-content:flex-end}
label{font-size:14px;color:#cfd6e4}
.help{font-size:12px;color:var(--muted)}
input[type=file],input[type=text],input[type=number],select{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 12px;outline:none}
input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.25)}
.actions{margin-top:12px}

.btn{appearance:none;border:none;background:#0f1722;border:1px solid var(--border);color:var(--text);padding:10px 14px;border-radius:10px;cursor:pointer;transition:.18s ease;display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.btn:hover{border-color:#2a3444}
.btn.primary{background:linear-gradient(180deg,var(--accent), var(--accent-2));color:#fff;border-color:transparent}
.btn.primary:hover{filter:brightness(1.05)}
.btn.ghost{background:transparent;border-color:var(--border);color:var(--muted)}
.btn.small{padding:6px 10px;font-size:12px}

.alert{border-radius:10px;padding:10px 12px;margin-bottom:12px;border:1px solid}
.alert-error{border-color:rgba(239,68,68,.6);background:rgba(239,68,68,.08);color:#fecaca}
.alert-warn{border-color:rgba(245,158,11,.5);background:rgba(245,158,11,.08);color:#fde68a}

.muted{color:var(--muted)}
.center{text-align:center}
.small{font-size:13px}
.mt{margin-top:10px}

.kv{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:6px 12px}
.kv li{display:contents}
.kv li span:first-child{color:var(--muted)}
.kv li span:last-child{text-align:right}

.table{display:grid;gap:6px}
.table-row{display:grid;grid-template-columns:1.2fr .7fr .6fr .6fr .8fr;gap:8px;padding:8px 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface)}
.table-head{background:#0f141a;color:#cfd6e4;font-weight:600}

.prewrap{white-space:pre-wrap;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px}
.code{white-space:pre;overflow:auto;background:#0c1117;border:1px solid var(--border);border-radius:10px;padding:12px}
.code.small{font-size:12px;max-height:320px}