:root {
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --border: #e3e7ed;
  --text: #1a2233;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --red: #dc2626;
  --red-bg: #fee2e2;
  --gray-bg: #f1f5f9;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Pretendard, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---- 로그인 ---- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-box {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.login-box h1 {
  font-size: 18px;
  margin: 0 0 12px;
  text-align: center;
}
.login-box label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}
.login-box input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: var(--gray-bg);
}
.login-box button {
  margin-top: 16px;
  padding: 11px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.login-box button:hover { background: var(--primary-dark); }
.login-error {
  background: var(--red-bg);
  color: var(--red);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  text-align: center;
}