:root {
  --bg-app: #0F172A;
  --bg-card: #1E293B;
  --border-card: #334155;
  --text-primary: #F8FAFC;
  --text-muted: #94A3B8;
  --brand-electric: #38BDF8;
  --status-saving: #34D399;
  --accent-bonus: #FBBF24;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: system-ui, -apple-system, sans-serif; }

body {
  background-color: var(--bg-app);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  padding: 16px;
}

.app-container {
  width: 100%;
  max-width: 390px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 20px;
}

/* Tokens de estado y tipografía */
.badge { background: rgba(251, 191, 36, 0.15); color: var(--accent-bonus); padding: 4px 8px; border-radius: 6px; font-size: 12px; font-weight: bold; }
.bonus-counter { font-size: 18px; margin-top: 8px; color: var(--text-muted); }
.bonus-counter strong { color: var(--accent-bonus); }

.input-group {
  display: flex;
  align-items: center;
  background: var(--bg-app);
  border: 1.5px solid var(--border-card);
  border-radius: 12px;
  padding: 8px 16px;
  margin: 12px 0;
}

.input-group input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  font-weight: bold;
  width: 100%;
  outline: none;
}

.btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

.btn-primary { background: var(--brand-electric); color: var(--bg-app); }
.btn-success { background: var(--status-saving); color: var(--bg-app); margin-top: 12px; }

.action-card { border-color: var(--status-saving); text-align: center; }
.amount { font-size: 32px; font-weight: bold; color: var(--status-saving); margin: 8px 0; }

.progress-header { display: flex; justify-content: space-between; font-size: 14px; color: var(--text-muted); }
.progress-bar-bg { background: var(--bg-app); height: 12px; border-radius: 6px; overflow: hidden; margin: 12px 0; }
.progress-bar-fill { background: var(--status-saving); height: 100%; width: 0%; transition: width 0.3s ease; }
.hidden { display: none; }