:root {
  --bg-dark: #090d16;
  --bg-panel: #111827;
  --bg-card: rgba(30, 41, 59, 0.78);
  --bg-card-hover: rgba(51, 65, 85, 0.88);
  --border-subtle: rgba(148, 163, 184, 0.18);
  --border-accent: rgba(99, 102, 241, 0.65);
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --accent-pink: #ec4899;
  --accent-amber: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --paper-ivory: #faf6ee;
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow-glow: 0 20px 50px rgba(0, 0, 0, 0.55), 0 0 30px rgba(99, 102, 241, 0.16);
}

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

html, body {
  min-height: 100%;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #090d16 65%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 15px 26px;
  border-radius: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  text-align: center;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(236, 72, 153, 0.45);
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.9);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(51, 65, 85, 0.95);
  border-color: rgba(148, 163, 184, 0.4);
}

.btn-success {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: #ffffff;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.16);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.4);
}

.btn-lg {
  font-size: 1.2rem;
  padding: 18px 34px;
  border-radius: 16px;
}

.btn-block {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(99, 102, 241, 0.2);
  color: #c7d2fe;
  border: 1px solid rgba(99, 102, 241, 0.35);
}

.alert {
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 0.95rem;
  margin-bottom: 16px;
  display: none;
}

.alert.visible {
  display: block;
}

.alert-error {
  background: rgba(239, 68, 68, 0.16);
  border: 1px solid rgba(239, 68, 68, 0.45);
  color: #fecaca;
}

.alert-success {
  background: rgba(16, 185, 129, 0.16);
  border: 1px solid rgba(16, 185, 129, 0.45);
  color: #a7f3d0;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: #e2e8f0;
}

.form-control {
  width: 100%;
  padding: 15px 16px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.85);
  color: var(--text-main);
  font-size: 1.05rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

.field-error {
  color: #fca5a5;
  font-size: 0.85rem;
  margin-top: 6px;
  min-height: 1.1em;
}