body.theme-1 {
  --bg: #f4f4f4;
  --text: #333;
  --accent: #3498db;
  --card-bg: #ffffff;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --font: Arial, sans-serif;
  --button-bg: var(--accent);
  --button-text: #ffffff;
}

body.theme-1 .container { padding: 26px; border: 1px solid rgba(0,0,0,0.06); }
body.theme-1 .container h1 { font-weight: 700; letter-spacing: 0.2px; }
body.theme-1 .container p { opacity: 0.9; }
body.theme-1 .button { border-radius: 10px; box-shadow: 0 6px 12px rgba(52, 152, 219, 0.24); }
body.theme-1 .button:hover { transform: translateY(-1px); }
body.theme-1 .loaders .loader-spinner { display: block; }