:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --bg: #f4f5f9;
  --card-bg: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --success: #16a34a;
  --error: #dc2626;
  --border: #e5e7eb;
  --radius: 10px;
}

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

body {
  font-family: 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  background: var(--card-bg);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  font-weight: 600;
}
.navbar a { color: var(--primary); text-decoration: none; margin-left: 16px; }

.container { max-width: 480px; margin: 24px auto; padding: 0 16px; }

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.auth-card {
  background: var(--card-bg);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  width: 100%;
  max-width: 400px;
}
.auth-card h1 { margin-bottom: 20px; font-size: 22px; }

label { display: block; margin-top: 14px; margin-bottom: 6px; font-size: 14px; font-weight: 600; }
small { color: var(--text-muted); font-size: 12px; }

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
input:focus { outline: none; border-color: var(--primary); }

button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: var(--primary-dark); }

.alert {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 14px;
}
.alert-error { background: #fee2e2; color: var(--error); }
.alert-success { background: #dcfce7; color: var(--success); }

.balance-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 24px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.balance-card p { opacity: 0.85; font-size: 14px; }
.balance-card h2 { font-size: 32px; margin-top: 6px; }

.quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}
.action-btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}
.action-btn:hover { border-color: var(--primary); color: var(--primary); }

.txn-table { width: 100%; border-collapse: collapse; background: var(--card-bg); border-radius: var(--radius); overflow: hidden; }
.txn-table th, .txn-table td { padding: 10px 12px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--border); }
.txn-table th { background: #f9fafb; color: var(--text-muted); }
.status-success { color: var(--success); font-weight: 600; }
.status-failed { color: var(--error); font-weight: 600; }
.status-pending { color: #ca8a04; font-weight: 600; }