:root {
  --bg-0: #07071a;
  --bg-1: #0d0d24;
  --card: rgba(20, 20, 42, 0.72);
  --card-border: rgba(139, 92, 246, 0.18);
  --card-border-strong: rgba(139, 92, 246, 0.35);
  --text: #f4f4fb;
  --muted: #8a8aa8;
  --label: #c4c4dd;
  --primary: #8b5cf6;
  --primary-hover: #a855f7;
  --primary-glow: rgba(139, 92, 246, 0.45);
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.08);
  --success-border: rgba(52, 211, 153, 0.35);
  --error: #f87171;
  --error-bg: rgba(248, 113, 113, 0.08);
  --error-border: rgba(248, 113, 113, 0.35);
  --cyan: #06b6d4;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 64px 16px;
  min-height: 100vh;
  position: relative;
  background:
    radial-gradient(1200px 800px at 20% 10%, rgba(139, 92, 246, 0.08), transparent 60%),
    radial-gradient(900px 700px at 85% 20%, rgba(6, 182, 212, 0.05), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,0.7), transparent 50%),
    radial-gradient(1px 1px at 27% 72%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1.5px 1.5px at 41% 33%, rgba(255,255,255,0.8), transparent 50%),
    radial-gradient(1px 1px at 55% 88%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 68% 12%, rgba(255,255,255,0.6), transparent 50%),
    radial-gradient(1.5px 1.5px at 79% 58%, rgba(255,255,255,0.7), transparent 50%),
    radial-gradient(1px 1px at 89% 81%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 7% 47%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 33% 6%, rgba(255,255,255,0.6), transparent 50%),
    radial-gradient(1.5px 1.5px at 62% 44%, rgba(255,255,255,0.5), transparent 50%);
  opacity: 0.85;
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  background: var(--card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  width: 100%;
  max-width: 480px;
  padding: 36px;
  border-radius: 18px;
  border: 1px solid var(--card-border);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.02) inset,
    0 20px 60px rgba(0, 0, 0, 0.45),
    0 0 80px -20px var(--primary-glow);
}

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--success);
  margin-bottom: 10px;
}

h1 {
  margin: 0 0 28px;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: linear-gradient(135deg, #ffffff 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--label);
  margin-bottom: 8px;
}

.field { margin-bottom: 20px; }

input, select, button {
  width: 100%;
  font-size: 15px;
  padding: 12px 14px;
  border-radius: 10px;
  font-family: inherit;
}

input, select {
  background: rgba(10, 10, 26, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

input::placeholder { color: var(--muted); }

input:hover, select:hover {
  border-color: rgba(139, 92, 246, 0.3);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(10, 10, 26, 0.9);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.18);
}

select option {
  background: #0d0d24;
  color: var(--text);
}

button {
  margin-top: 10px;
  background: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
  color: #ffffff;
  border: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.2s, filter 0.2s;
  box-shadow: 0 8px 24px -8px var(--primary-glow);
}

button:hover:not(:disabled) {
  filter: brightness(1.08);
  box-shadow: 0 12px 32px -8px var(--primary-glow);
}

button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.result {
  margin-top: 22px;
  padding: 16px;
  border-radius: 12px;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  display: none;
  backdrop-filter: blur(8px);
}

.result.show { display: block; }

.result.ok {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.result.err {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error-border);
}

.result ul { color: #e8e8f5; }
.result li { margin: 4px 0; }

.hint { font-size: 12px; color: var(--muted); margin-top: 8px; }

pre {
  margin: 10px 0 0;
  background: rgba(7, 7, 26, 0.85);
  color: #d8d8e8;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.05);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  overflow-x: auto;
  max-height: 360px;
}