:root{
  --bg1:#0ea5e9;
  --bg2:#8b5cf6;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --border: rgba(15, 23, 42, 0.12);
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.14);
  --btn:#0f172a;
  --btnText:#ffffff;
  --accent:#22c55e;
}

body.dark{
  --card: rgba(15, 23, 42, 0.82);
  --text:#e2e8f0;
  --muted:#cbd5e1;
  --border: rgba(226, 232, 240, 0.18);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --btn:#e2e8f0;
  --btnText:#0f172a;
  --accent:#38bdf8;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  font-family: Arial, sans-serif;
  color: var(--text);
  min-height:100vh;
  background: radial-gradient(1200px 600px at 10% 10%, var(--bg1), transparent 60%),
              radial-gradient(1200px 600px at 90% 20%, var(--bg2), transparent 60%),
              #0b1220;
}

.container{
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 16px 40px;
}

.header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom: 18px;
}

h1{
  margin:0;
  font-size: 34px;
  letter-spacing: 0.3px;
}

.subtitle{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.profile{
  display:flex;
  align-items:center;
  gap:14px;
  margin: 14px 0 18px;
}

.avatar{
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  background: linear-gradient(135deg, var(--accent), #f59e0b);
  color: #0b1220;
}

.meta{ margin: 4px 0; }
.small{ font-size: 13px; color: var(--muted); }

.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 860px){
  .grid{ grid-template-columns: 1fr 1fr; }
}

h2{
  margin: 0 0 10px;
  font-size: 20px;
}

p{ margin: 0 0 10px; line-height: 1.6; }

.divider{
  height:1px;
  background: var(--border);
  margin: 14px 0;
}

.actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom: 8px;
}

.btn{
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  transition: transform 0.08s ease, opacity 0.2s ease;
  font-weight: 700;
}

.btn:active{ transform: scale(0.98); }

.primary{
  background: var(--btn);
  color: var(--btnText);
  border-color: transparent;
}

.secondary{
  background: transparent;
  color: var(--text);
}

.ghost{
  background: transparent;
  color: var(--text);
}

.hint{
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}

.result{
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px dashed var(--border);
}

.label{
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 6px;
}

.msg{
  margin: 0 0 12px;
  font-weight: 800;
  font-size: 16px;
}

.stats{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
}

.stat{
  flex: 1 1 140px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.statTitle{
  display:block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.statValue{
  font-weight: 900;
}

.footer{
  margin-top: 18px;
  text-align:center;
  color: rgba(226, 232, 240, 0.8);
  font-size: 13px;
}