:root{--color-primary: #3f51b5;--color-primary-dark: #303f9f;--color-primary-light: #e8eaf6;--color-accent: #536dfe;--color-success: #4caf50;--color-warning: #ff9800;--color-danger: #f44336;--color-background: #f5f5f5;--color-text: #212121;--color-text-secondary:#757575;--color-border: #e0e0e0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-background);color:var(--color-text);min-height:100vh}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:.95rem;font-weight:700;cursor:pointer;transition:all .2s ease;text-transform:uppercase;letter-spacing:.5px;font-family:inherit}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0003}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}