:root {
  --bg-primary: #0a0e17;
  --bg-card: #131b2e;
  --bg-input: #1b2640;
  --accent: #ec4899;
  --accent-glow: rgba(236, 72, 153, 0.25);
  --text-main: #e2e8f0;
  --text-muted: #8892b0;
  --border: #2d3748;
  --success: #10b981;
  --danger: #ef4444;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Inter', system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand span {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 400;
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  flex: 1;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.card-title {
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: 8px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.input-field {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 6px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.btn:hover {
  opacity: 0.9;
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: #fca5a5;
  padding: 14px 18px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 0.92rem;
}

.preview-box {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
}

.vault-box {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success);
  padding: 16px;
  border-radius: 8px;
  margin-top: 20px;
  display: none;
}