:root {
  --bg: #0a0c10;
  --panel: rgba(20, 24, 32, 0.6);
  --text: #e8ecf1;
  --muted: #9aa4b2;
  --accent: #7c5cff;
  --accent2: #22c55e;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 30%, rgba(124,92,255,0.15), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(34,197,94,0.12), transparent 40%),
    var(--bg);
  overflow-x: hidden;
}

body {
  padding: 24px;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
}

.card {
  position: relative;
  background: var(--panel);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow:
    0 0 40px rgba(124,92,255,0.12),
    inset 0 0 20px rgba(255,255,255,0.02);
  overflow: hidden;
}

/* glow edge */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(120deg, transparent, rgba(124,92,255,0.6), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

h1, h2, h3 {
  margin-top: 0;
}

p {
  line-height: 1.6;
}

.muted {
  color: var(--muted);
}

input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(10,12,16,0.8);
  color: var(--text);
  margin: 12px 0;
  transition: 0.25s ease;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(124,92,255,0.4);
}

button, .btn {
  display: inline-block;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  cursor: pointer;
  text-decoration: none;
  font-weight: 700;
  position: relative;
  overflow: hidden;
}

button:hover, .btn:hover {
  opacity: 0.92;
}

/* glow hover wave */
button::after, .btn::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: radial-gradient(circle, rgba(255,255,255,0.18), transparent 40%);
  opacity: 0;
  transition: 0.4s;
}

button:hover::after, .btn:hover::after {
  opacity: 1;
}

.row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.keybox {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,0.15);
  background: rgba(10,12,16,0.7);
  opacity: 0;
  transform: translateY(10px);
  transition: 0.5s ease;
}

.keybox.active {
  opacity: 1;
  transform: translateY(0);
  box-shadow: 0 0 25px rgba(34,197,94,0.25);
}

.good { color: var(--accent2); font-weight: 700; }
.bad { color: #ef4444; font-weight: 700; }

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 50%, rgba(124,92,255,0.06), transparent 60%);
  animation: pulse 6s infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.35; }
  to { opacity: 0.65; }
}