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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
}

#login-screen {
  text-align: center;
  margin-top: 20vh;
}

#login-screen h1 { margin-bottom: 8px; }
#login-screen p { margin-bottom: 24px; color: #666; }
.g_id_signin { display: inline-block; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

#sign-out-btn, #refresh-btn {
  background: none;
  border: 1px solid #ccc;
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
}

#refresh-btn { margin-right: 8px; }

.balance-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  margin-bottom: 24px;
}

.account-section { margin-bottom: 32px; }

.label { color: #888; font-size: 14px; margin-bottom: 4px; }
.amount { font-size: 36px; font-weight: 700; }

#error-msg {
  background: #fee;
  color: #c00;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 16px;
}

h2 { margin-bottom: 12px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

th, td { padding: 10px 12px; text-align: left; }
th { background: #fafafa; font-weight: 600; font-size: 13px; color: #666; }
td { border-top: 1px solid #eee; font-size: 14px; }
td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.positive { color: #16a34a; }
.negative { color: #dc2626; }